Carrier Heat Pump 50PCH User Manual
AQUAZONE™  
50PCH,PCV006-060  
Compact High-Efficiency Water Source Heat Pumps  
with PURON® Refrigerant (R-410A)  
Installation, Start-Up, and  
Service Instructions  
Page  
CONTENTS  
Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 30  
Unit Start-Up with WSHP Open Controls . . . . . . . . 30  
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32  
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32  
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32  
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 32  
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-36  
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33  
Units with Aquazone Complete C Control . . . . . . . 33  
Units with Aquazone Deluxe D Control . . . . . . . . . . 33  
Units with WSHP Open Multiple Protocol. . . . . . . . 33  
Page  
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2  
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22  
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2  
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
• STORAGE  
• PROTECTION  
• INSPECT UNIT  
Step 3 — Locate Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
• FIELD CONVERSION OF DISCHARGE AIR  
Step 4 — Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . . . 8  
• HORIZONTAL UNITS  
COMPLETE C AND DELUXE D BOARD  
SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-38  
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36  
WSHP Open Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 36  
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37  
Aquazone Deluxe D Control LED Indicators . . . . . 37  
• VERTICAL UNITS  
Step 5 — Check Duct System . . . . . . . . . . . . . . . . . . . . 8  
• SOUND ATTENUATION  
• EXISTING DUCT SYSTEM  
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-40  
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38  
Water Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38  
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 38  
Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38  
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38  
Fan Motors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38  
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 38  
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39  
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39  
Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 39  
Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 39  
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 40  
Replacing the WSHP Open Controller’s  
Step 6 — Install Condensate Drain . . . . . . . . . . . . . . . 8  
• HORIZONTAL UNITS  
• VERTICAL UNITS  
• VENTING  
Step 7 — Pipe Connections . . . . . . . . . . . . . . . . . . . . . . 9  
• WATER LOOP APPLICATIONS  
• GROUND LOOP APPLICATIONS  
• INSTALLATION OF SUPPLY AND RETURN HOSE  
KIT  
Step 8 — Wire Field Power Supply . . . . . . . . . . . . . . 10  
• POWER CONNECTION  
• SUPPLY VOLTAGE  
• 208-VOLT OPERATION  
• 460-VOLT OPERATION  
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40  
Step 9 — Wire Field Controls. . . . . . . . . . . . . . . . . . . . 20  
• THERMOSTAT CONNECTIONS  
• WATER FREEZE PROTECTION  
• AIR COIL FREEZE PROTECTION  
• ACCESSORY CONNECTIONS  
• WATER SOLENOID VALVES  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 40-42  
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40  
Control Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40  
WSHP Open Controller. . . . . . . . . . . . . . . . . . . . . . . . . . 40  
APPENDIX A — WSHP OPEN SCREEN  
CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . 43-48  
• WSHP OPEN WIRING  
50PCH,PCV START-UP CHECKLIST . . . . . CL-1, CL-2  
PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22,23  
System Checkout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
PSC Blower Speed Selection . . . . . . . . . . . . . . . . . . 22  
IMPORTANT: Read the entire instruction manual before  
starting installation.  
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . .24,25  
Complete C Control Jumper Settings. . . . . . . . . . . 24  
Complete C Control DIP Switches. . . . . . . . . . . . . . 24  
Deluxe D Control Jumper Settings . . . . . . . . . . . . . 24  
Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 24  
Deluxe D Control Accessory Relay  
Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Water Valve (Slow Opening) . . . . . . . . . . . . . . . . . . . 25  
Outside Air Damper (OAD) . . . . . . . . . . . . . . . . . . . . 25  
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-33  
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 26  
Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 26  
SAFETY CONSIDERATIONS  
Installation and servicing of air-conditioning equipment can  
be hazardous due to system pressure and electrical compo-  
nents. Only trained and qualified service personnel should  
install, repair, or service air-conditioning equipment.  
Untrained personnel can perform basic maintenance func-  
tions of cleaning coils and filters and replacing filters. All other  
operations should be performed by trained service personnel.  
When working on air-conditioning equipment, observe  
precautions in the literature, tags and labels attached to the unit,  
and other safety precautions that may apply.  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53500094-01 Printed in U.S.A. Form 50PC-3SI Pg 1 3-11 Replaces: 50PC-2SI  
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or an equivalent protective covering. Cap open ends of pipes  
stored on the jobsite. This precaution is especially important in  
areas where painting, plastering, or spraying of fireproof mate-  
rial, etc. is not yet complete. Foreign material that accumulates  
within the units can prevent proper start-up and necessitate  
costly clean-up operations.  
Before installing any of the system components, be sure to  
examine each pipe, fitting, and valve, and remove any dirt or  
foreign material found in or on these components.  
3. Do not remove the packaging until the unit is ready for  
installation.  
4. Verify that the refrigerant tubing is free of kinks or dents,  
and that it does not touch other unit components.  
5. Inspect all electrical connections. Be sure connections are  
clean and tight at the terminals.  
6. Loosen compressor bolts until the compressor rides freely  
on springs. Remove shipping restraints.  
1
7. Remove the four /4 in. shipping bolts from compressor  
support plate (two bolts on each side) to maximize vibra-  
tion and sound alternation.  
CAUTION  
DO NOT store or install units in corrosive environments or  
in locations subject to temperature or humidity extremes  
(e.g., attics, garages, rooftops, etc.). Corrosive conditions  
and high temperature or humidity can significantly reduce  
performance, reliability, and service life. Always move  
units in an upright position. Tilting units on their sides may  
cause equipment damage.  
CAUTION  
Failure to remove shipping brackets from spring-mounted  
compressors will cause excessive noise and could cause  
component failure due to added vibration.  
8. Remove any blower support cardboard from inlet of the  
blower.  
9. Locate and verify any accessory kit located in compressor  
section.  
10. Remove any access panel screws that may be difficult to  
remove once unit is installed.  
INSPECT UNIT — To prepare the unit for installation, com-  
plete the procedures listed below:  
1. Compare the electrical data on the unit nameplate with  
ordering and shipping information to verify that the  
correct unit has been shipped.  
2. Verify that the unit is the correct model for the entering  
water temperature of the job.  
Table 1 — Physical Data — 50PCH,PCV Units  
50PCH,PCV UNIT  
006  
009  
012  
015  
018  
024  
030  
036  
042  
048  
060  
COMPRESSOR (1 each)  
REFRIGERANT TYPE  
Factory Charge (oz)  
Rotary  
Scroll  
9 x 8  
R-410A  
43  
17  
18.5  
23  
32  
43  
47  
50  
70  
74  
82  
1
FAN MOTOR AND BLOWER  
Fan Motor Type/Speeds  
Fan Motor (hp)  
PSC/3  
1
1
1
1
/
1
/
1
/
3
/
1
/
3
/
3
/
/
/
/
10  
10  
6
6
4
4
2
4
Blower Wheel Size (Dia x W) (in.)  
25 5 x 5  
6 x 5  
8 x 7  
9 x 7  
10 x410 11 x 10  
COAX VOLUME (gal.)  
0.123  
0.143  
0.167  
0.286  
0.450  
0.286  
0.323  
0.323  
0.890  
0.738  
0.939  
1
/
3
WATER CONNECTION SIZE FPT (in.)  
/
1
2
4
HORIZONTAL  
Air Coil Dimensions (H x W)(in.)  
Standard Filter - (Qty)  
1 in. Throwaway  
Weight (lb)  
10 x 15  
16 x 22  
20 x 25  
20 x 35  
(1) 20 x 28 or  
(2) 20 x 14  
(1) 20 x 24,  
(1) 20 x 14  
(1) 10 x 18  
(1) 16 x 25  
(1) 18 x 25  
Operating  
103  
113  
105  
115  
114  
124  
153  
158  
158  
163  
174  
179  
182  
187  
203  
209  
218  
224  
263  
270  
278  
285  
Packaged  
Corner Weight (lb)*  
Left-Front  
37  
24  
23  
19  
38  
24  
23  
20  
42  
26  
25  
21  
53  
36  
34  
30  
55  
37  
35  
31  
62  
40  
39  
33  
67  
41  
40  
34  
75  
47  
44  
37  
81  
50  
48  
39  
98  
60  
58  
47  
103  
64  
Right-Front  
Left-Back  
61  
Right-Back  
75  
VERTICAL  
Air Coil Dimensions (H x W)(in.)  
Standard Filter - (Qty)  
1 in. Throwaway  
Weight (lb)  
10 x 15  
20 x 17.25  
(1) 20 x 20  
24 x 17.75  
(1) 24 x 24  
24 x 28.25  
(1) 14 x 24,  
(1) 18 x 24  
(1) 10 x 18  
Operating  
Packaged  
103  
113  
105  
115  
114  
124  
153  
158  
158  
163  
189  
194  
197  
202  
203  
209  
218  
224  
263  
270  
278  
285  
LEGEND  
FPT — Female Pipe Thread  
PSC — Permanent Split Capacitor  
*Front is located at control box end.  
NOTES:  
1
1. All units have grommet compressor mountings, and /2-in. and  
3/4-in. electrical knockouts.  
2. Maximum water working pressure is 500 psig.  
3
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LEFT RETURN  
RIGHT RETURN  
LEGEND  
OPTIONAL 2 FT  
BSP — Blower Service Panel  
CAP — Control Access Panel  
CSP — Compressor Service Panel  
FPT — Female Pipe Thread  
2 FT [610 MM] SERVICE  
ACCESS  
[610 MM]  
2 FT [610 MM] SERVICE  
ACCESS  
CSP  
SERVICE  
ACCESS  
FRONT  
FRONT  
OPTIONAL 2 FT  
[610 MM]  
SERVICE  
POWER SUPPLY  
3 / 4" [19.1 MM] KNOCKOUT  
ACCESS  
LEFT RETURN  
RIGHT RETURN  
1 / 2"  
G
1.1 [27.9 MM]  
K
[12.7 MM]  
CSP  
KNOCKOUT  
[83.8 MM]  
3.3"  
F
3.3"  
2
J
[83.8 MM]  
H
LOW VOLTAGE  
1 / 2" [12.7 MM]  
KNOCKOUT  
E
D
CAP  
0.7"  
[17.8 MM]  
0.7" [17.8 MM]  
RIGHT/STRAIGHT  
DISCHARGE  
1
3
LEFT/STRAIGHT  
DISCHARGE  
A
CONDENSATE  
3 / 4" FPT  
BACK  
DISCHARGE  
CONDENSATE BACK  
3 / 4" FPT  
DISCHARGE  
NOTE: CHOOSE EITHER  
BACK OR STRAIGHT DISCHARGE  
FRONT-VIEW  
NOTE: CHOOSE EITHER  
BACK OR STRAIGHT DISCHARGE  
NOTE: BLOWER SERVICE PANEL REQUIRES 2 FT SERVICE ACCESS  
P
O
N
N
UNIT HANGER DETAIL  
BSP  
BLOWER  
OUTLET  
BSP  
MODEL  
U
V
W
C
C
M
006-012 34.1 [86.6] 21.1 [53.6] 18.9 [42.9]  
015-030 43.1 [109.5] 22.2 [56.4] 18.0 [45.7]  
036-042 47.1 [119.6] 22.2 [56.4] 18.0 [45.7]  
M
O
BLOWER  
OUTLET  
V
W
048-060 54.1 [137.4] 26.2 [66.5] 22.0 [55.9]  
a50-8695  
P
A
A
U
RIGHT RETURN BACK DISCHARGE  
LEFT RETURN BACK DISCHARGE  
N
O
L
N
BLOWER  
OUTLET  
BSP  
BSP  
CSP  
M
M
BLOWER  
OUTLET  
L
FRONT  
FRONT  
O
RIGHT RETURN STRAIGHT DISCHARGE  
LEFT RETURN STRAIGHT DISCHARGE  
1.75 [44.5 MM]  
AIR COIL  
Q
S
Q
S
T
T
AIR COIL  
CSP  
R
R
C
C
FRONT  
FRONT  
B
B
LEFT RETURN LEFT VIEW -  
AIR COIL OPENING  
RIGHT RETURN RIGHT VIEW -  
AIR COIL OPENING  
50PCH006-060 UNITS  
DISCHARGE CONNECTIONS  
DUCT FLANGE  
RETURN CONNECTION  
USING RETURN AIR  
OPENING  
WATER  
CONNECTIONS  
OVERALL CABINET  
ELECTRICAL KNOCKOUTS  
(0.10 in., 2.5 mm)  
50PCH  
UNIT  
1
2
3
4
H
J
K
M
N
Q
R
SIZE  
Size  
1/2-in.  
1/2-in.  
3/4-in.  
A
B
C
Loop In Loop Out  
L
Supply Supply  
Height Width  
O
P
Return Return  
Depth Height  
S
T
(IPT)  
Width Depth Height  
Low  
Low  
Power  
Supply  
2.1  
5.4  
6.1  
15.6  
6.1  
15.6  
6.1  
15.6  
6.1  
15.6  
10.1  
25.7  
10.1  
25.7  
10.1  
25.7  
10.1  
25.7  
D
E
F
G
Voltage Voltage  
1
006- in.  
012 cm 48.5  
19.1 34.1 11.1  
9.6 1.1  
86.6 28.2 24.3 2.7  
43.1 17.0 15.1 1.4  
1.5 1.1  
3.8 2.7  
3.2 1.4  
8.1 3.5  
/
8.1  
20.6  
12.1  
30.8  
12.1  
30.8  
12.1  
30.8  
12.1  
30.8  
16.1  
41.0  
16.1  
41.0  
5.1  
13.0  
9.1  
23.2  
9.1  
23.2  
9.1  
23.2  
9.1  
23.2  
13.1  
33.3  
13.1  
33.3  
13.1  
33.3  
13.1  
33.3  
0.8  
8.9  
1.9 22.7  
2.6 13.3  
6.6 33.8  
2.6 13.3  
6.6 33.8  
2.6 13.3  
6.6 33.8  
2.6 13.3  
6.6 33.8  
2.5 16.1  
6.3 40.9  
2.5 16.1  
6.3 40.9  
6.7  
8.2 1.3 16.1  
9.8  
25.0  
15.0  
38.1  
15.0  
38.1  
16.3  
41.4  
16.3  
41.4  
19.0  
48.3  
19.0  
48.3  
1.1 0.6  
2.7 1.5  
1.1 1.0  
2.8 2.5  
1.1 1.0  
2.8 2.5  
1.1 1.0  
2.8 2.5  
1.1 1.0  
2.8 2.5  
1.1 1.0  
2.8 2.5  
1.1 1.0  
2.8 2.5  
1.1 1.0  
2.8 2.5  
1.23  
17.0 13.3 3.3 41.0  
1
in.  
20.1  
/
9.9 4.1 1.3 23.0  
25.1 10.5 3.3 58.4  
9.9 4.1 1.3 23.0  
25.1 10.5 3.3 58.4  
9.9 4.1 1.3 23.0  
25.1 10.5 3.3 58.4  
9.9 4.1 1.3 23.0  
25.1 10.5 3.3 58.4  
11.0  
27.9  
11.0  
27.9  
cm 51.1 109.5 43.2 38.4 3.4  
1.23  
015  
018  
024  
030  
036  
042  
048  
060  
1
in.  
20.1  
43.1 17.0 15.1 1.4  
4.1 1.4  
/
cm 51.1 109.5 43.2 38.4 3.4 10.4 3.5  
1.23  
3
in.  
20.1  
43.1 18.3 15.1 1.4  
4.4 1.4  
/
cm 51.1 109.5 46.5 38.4 3.4 11.3 3.5  
1.49  
3
in.  
20.1  
43.1 18.3 15.1 1.4  
3.1 1.4  
7.8 3.5  
5.3 1.4  
/
cm 51.1 109.5 46.5 38.4 3.4  
1.49  
3
in. 20.1 47.1 21.0 15.1 1.4  
cm 51.1 119.6 53.3 38.4 3.4 13.4 3.5  
/
3.0 2.5 25.9  
7.7 6.4 65.8  
3.0 2.5 25.9  
7.7 6.4 65.8  
1.49  
3
in.  
20.1  
47.1 21.0 15.1 1.4  
4.4 1.4  
/
cm 51.1 119.6 53.3 38.4 3.4 11.3 3.5  
1.49  
in. 24.1 54.1 21.0 15.1 1.4 4.4 1.4  
cm 61.2 137.4 53.3 38.4 3.4 11.1 3.5  
1
2.5  
1
2.5  
16.1  
41.0  
16.1  
41.0  
3.7 16.1  
9.5 41.0  
1.7 18.1  
4.4 46.0  
13.7  
4.1 1.3 35.9  
19.0  
48.3  
19.0  
48.3  
34.8 10.3 3.2 91.2  
in.  
24.1  
54.1 21.0 15.1 1.4  
3.8 1.4  
9.7 3.5  
13.7  
4.1 1.3 35.9  
1.1 1.0  
2.8 2.5  
cm 61.2 137.4 53.3 38.4 3.4  
34.8 10.3 3.2 91.2  
NOTES:  
3. Discharge flange and hanger brackets are factory installed.  
4. Condensate is 3/4-in. (19.1 mm) FPT copper.  
1. While clear access to all removable panels is not required, installer should  
take care to comply with all building codes and allow adequate clearance  
for future field service.  
5. Blower service panel requires 2 ft (610 mm) service access.  
6. Blower service access is through back panel on left or right discharge units  
or through panel opposite air coil on back discharge units.  
2. Horizontal units shipped with filter bracket only. This bracket should be  
removed for return duct connection.  
Fig. 1 — 50PCH Unit Dimensions  
4
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Return Loop  
Supply Loop  
3/8" threaded rods  
(by others)  
ater In  
W
Filter Access  
Water Out  
Return Air  
(Ductwork  
not shown)  
Thermostat  
Wiring  
Field-supplied transition to  
minimize pressure loss  
Balancing Valve (Field  
installed and calibrated  
accessory)  
Power Wiring  
Accessory  
stainless steel  
braid hose  
with integral  
“J” swivel  
Supply Air  
Low Pressure Drop Water  
Control Valve (optional) or  
(field-installed accessory)  
Unit Power  
Flexible  
Connection  
Insulated supply duct with  
at least one 90 degree elbow  
to reduce air noise  
Water Out  
Water In  
Unit Power  
Disconnect  
Accessory  
Electric Heat  
(if applicable)  
(field supplied)  
Ball Valve Accessory with optional  
integral P/T plug (typical for supply  
and return piping)  
Unit Hanger  
3/8" Threaded  
Rod (by others)  
Vibration Isolator  
(white compressor end  
and red blower end)  
Washer  
(by others)  
Double Hex Nuts  
(by others)  
Integral hanger support-  
pre-attached in factory  
a50-7842ef  
UNIT HANGER ISOLATION DETAIL  
Fig. 2 — Typical Installation — 50PCH Units  
5
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P
N
ACCESS PANELS  
FIELD INSTALLED  
DISCHARGE FLANGE  
LEGEND  
STANDARD FILTER BRACKET  
ASP — Alternate Service Panel  
BSP — Blower Service Panel  
CAP — Control Access Panel  
CSP — Compressor Service Panel  
FPT — Female Pipe Thread  
HV — High Voltage  
O
Q
LV — Low Voltage  
AIR COIL AND FRONT SIDE  
TOP VIEW-FRONT RETURN  
AIR COIL  
B
BSP  
P
N
P
N
ASP  
OPTIONAL  
O
2 FT [610 MM]  
SERVICE  
O
ACCESS  
A
CSP  
LEFT RTN  
(RIGHT RTN  
OPPOSITE  
SIDE)  
CAP  
M
R
Q
R
AIR COIL SIDE  
AIR COIL SIDE  
TOP VIEW-RIGHT RETURN  
TOP VIEW-LEFT RETURN  
S
S
2 FT [610 MM]  
SERVICE  
ISOMETRIC  
VIEW  
1.00 [25.4 MM]  
U
U
AIR COIL  
AIR COIL  
BSP  
T
T
a50-8696  
G
C
C
CONDENSATE  
3/4" FPT  
POWER SUPPLY  
3/4" [19.1 MM] HV  
KNOCKOUT  
2
LOW VOLTAGE  
1/2" [12.7 MM] LV  
KNOCKOUT  
CAP  
LOW VOLTAGE  
1/2" [12.7 MM] LV  
KNOCKOUT  
3
CSP  
CSP  
F
L
K
I
H
CSP  
FRONT  
BACK BACK  
FRONT  
J
1
D
RIGHT RETURN RIGHT VIEW  
- AIR COIL OPENING  
LEFT RETURN LEFT VIEW  
- AIR COIL OPENING  
E
FRONT-VIEW  
50PCV006-060 UNITS  
DISCHARGE CONNECTION  
DUCT FLANGE INSTALLED  
(0.10 in., 2.5 mm)  
RETURN CONNECTION  
USING RETURN AIR  
OPENING  
OVERALL CABINET  
WATER CONNECTIONS  
ELECTRICAL KNOCKOUTS  
50PCV  
UNIT  
SIZE  
J
K
L
1
2
3
1/2-in.  
1/2-in.  
3/4-in.  
(1.3 cm)  
O
P
S
T
A
B
C
Size  
(1.3 cm) (1.3 cm)  
M
N
Supply Supply  
Width Depth  
Q
R
Return Return  
Depth Height  
U
Width Depth Height  
(IPT)  
D
E
F
G
Low  
Low  
Power  
Supply  
H
I
Voltage Voltage  
Loop In Loop Out  
22.0 1.4 1.6 9.5 1.6  
55.9 3.6 4.1 24.1 4.3 15.6  
1
/
006-  
012  
in.  
19.1  
cm 48.5  
19.1  
48.5  
6.1  
1.6  
4.1  
2.9  
7.3  
5.9  
14.9  
8.9  
22.5  
8.9 5.1  
22.7 12.9  
9.0  
22.9  
9.0  
22.9  
5.5 2.1  
16.2  
41.1  
9.9  
25.1  
0.7  
1.9  
2
1.3  
14.0 5.3  
1
in.  
21.5  
21.5  
54.6  
39.0 1.9 1.4 13.8 1.4  
8.1  
1.4  
3.6  
/
4.1  
7.1  
10.1  
25.7  
6.4 3.8  
14.0  
35.6  
14.0  
35.6  
5.3 2.3  
18.3  
46.5  
20.9  
53.1  
0.7  
1.9  
2
015  
018  
cm 54.6  
99.1 4.8 3.6 35.1 3.6 20.6  
1.3  
1
10.5  
18.1  
16.1 9.5  
13.6 5.8  
in. 21.5  
cm 54.6  
in. 21.5  
cm 54.6  
in. 21.5  
cm 54.6  
in. 21.5  
cm 54.6  
in. 21.5  
cm 54.6  
in. 24.0  
cm 61.0  
in. 24.0  
cm 61.0  
21.5  
54.6  
39.0 1.9 1.4 12.9 1.4 8.1  
99.1 4.8 3.6 32.8 3.6 20.6  
40.0 1.9 1.4 13.8 1.4 8.1  
101.6 4.8 3.6 35.1 3.6 20.6  
40.0 1.9 1.4 15.2 1.4 8.1  
101.6 4.8 3.6 38.6 3.6 20.6  
45.0 1.9 1.4 15.7 1.4 8.1  
114.3 4.8 3.6 39.9 3.6 20.6  
45.0 1.9 1.4 16.6 1.4 8.1  
114.3 4.8 3.6 42.0 3.6 20.6  
46.0 1.9 1.4 16.6 1.4 8.1  
116.8 4.8 3.6 42.2 3.6 20.6  
46.0 1.9 1.4 16.7 1.4 8.1  
116.8 4.8 3.6 42.4 3.6 20.6  
1.4  
3.6  
/
2
4.1  
10.5  
7.1  
18.1  
10.1  
25.7  
6.4 3.8  
16.1 9.5  
14.0  
35.6  
14.0  
35.6  
5.3 2.3  
13.6 5.8  
18.3  
46.5  
20.9  
53.1  
0.7  
1.9  
1.3  
3
21.5  
54.6  
1.4  
3.6  
/
4
4.1  
10.5  
7.1  
18.1  
10.1  
25.7  
6.4 3.8  
16.1 9.5  
14.0  
35.6  
14.0  
35.6  
5.3 2.3  
13.6 5.8  
18.3  
46.5  
20.9  
53.1  
0.7  
1.9  
024  
1.9  
3
21.5  
54.6  
1.4  
3.6  
/
4
4.1  
10.5  
7.1  
18.1  
10.1  
25.7  
6.4 3.8  
16.1 9.5  
14.0  
35.6  
14.0  
35.6  
5.3 2.3  
13.6 5.8  
18.3  
46.5  
20.9  
53.1  
0.7  
1.9  
030  
1.9  
3
26.0  
66.0  
1.4  
3.6  
/
4
4.1  
10.5  
7.1  
18.1  
10.1  
25.7  
6.4 3.8  
16.1 9.5  
14.0  
35.6  
14.0  
35.6  
5.1 2.3  
13.1 5.8  
22.8  
57.9  
23.9  
60.7  
0.7  
1.9  
036  
1.9  
3
26.0  
66.0  
1.4  
3.6  
/
4
4.1  
10.5  
7.1  
18.1  
10.1  
25.7  
6.4 3.8  
16.1 9.5  
14.0  
35.6  
14.0  
35.6  
5.1 2.3  
13.1 5.8  
22.8  
57.9  
23.9  
60.7  
0.7  
1.9  
042  
1.9  
32.5  
82.6  
1.4  
3.6  
1
2.5  
4.1  
10.5  
7.1  
18.1  
10.1  
25.7  
6.9 7.3  
17.4 18.4  
16.0  
40.6  
18.0  
45.7  
5.1 2.3  
13.1 5.8  
29.3  
74.4  
22.5  
57.0  
0.7  
1.9  
048  
32.5  
82.6  
1.4  
3.6  
1
2.5  
4.1  
10.5  
7.1  
18.1  
10.1  
25.7  
6.9 7.3  
17.4 18.4  
16.0  
40.6  
18.0  
45.7  
5.1 2.3  
13.1 5.8  
29.3  
74.4  
22.5  
57.0  
0.7  
1.9  
060  
NOTES:  
3. Discharge flange is field installed.  
4. Condensate is 3/4 in. (19.1 mm) FPT.  
5. Units shipped with filter rails. These rails should be removed for return duct connection.  
See WSHP Accessory Price Page for accessory air filter frame with duct collar.  
1. Shaded areas are recommended service areas. Installer should take care to comply with  
all building codes and allow adequate clearance for future field service.  
2. Front and side access is preferred for service access. However, all components may be  
serviced from the front access panel if side access is not available except on 50PCV009-  
030 with front return.  
Fig. 3 — 50PCV Unit Dimensions  
6
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between side and back discharge in the field. The conversion  
process is the same for right and left return configurations. See  
Fig. 5 and 6.  
NOTE: It is not possible to convert return air between left or  
right return models in the field due to refrigerant piping  
changes.  
Supply Air  
a50-6803ef  
Building  
Loop  
Flexible  
Connection  
Water  
Out  
Preparation — The unit should be on the ground in a well lit  
area for conversion. Hung units should be taken down to  
ground level before converting.  
Water  
In  
Balancing Valve  
(field installed  
and calibrated  
accessory)  
Field-supplied  
stainless steel  
braid hose  
with integral  
“J” swivel  
Remove Screws  
Water  
Connection End  
Low Pressure  
Drop Water  
Control Valve  
(optional)  
(field-installed  
accessory)  
Power  
Return Air  
Thermostat  
Wiring  
Ball Valve with optional  
integral P/T plug  
(typical for supply and  
return piping)  
Compressor  
Access Panel  
Side Discharge  
NOTE: Ball valve with integral pressure temperature plug recommended.  
Water  
Connection End  
Fig. 4 — Typical Vertical Installation of 50PCV Unit  
Rotate  
Step 3 — Locate Unit — The following guidelines  
Return Air  
should be considered when choosing a location for a WSHP:  
• Units are for indoor use only.  
• Locate in areas where ambient temperatures are between  
40 F and 100 F and relative humidity is no greater than  
75%.  
• Provide sufficient space for water, electrical and duct  
connections.  
Move to Side  
• Locate unit in an area that allows easy access and  
removal of filter and access panels.  
• Allow enough space for service personnel to perform  
maintenance.  
Replace Screws  
Water  
Connection End  
Return Air  
• Return air must be able to freely enter the space if unit  
needs to be installed in a confined area such as a closet.  
• Install the unit on a piece of rubber, neoprene or other  
mounting pad material for sound isolation. The pad  
Drain  
3
1
should be at least /8 in. [10 mm] to /2 in. [13 mm] in  
thickness. Extend the pad beyond all four edges of the  
unit.  
Discharge Air  
Back Discharge  
• Provide adequate clearance for filter replacement and  
drain pan cleaning. Do not block filter access with pip-  
ing, conduit or other materials. Refer to Fig. 1 and 3 for  
dimensional data.  
• Provide access for fan and fan motor maintenance and  
for servicing the compressor and coils without removing  
the unit.  
Fig. 5 — Conversion Left Return,  
Side Discharge to Back Discharge  
Water  
Connection End  
Return Air  
• Provide an unobstructed path to the unit within the closet  
or mechanical room. Space should be sufficient to allow  
removal of the unit, if necessary.  
Supply  
Duct  
• In limited side access installations, pre-removal of the  
control box side mounting screws will allow control box  
removal for future servicing.  
Side Discharge  
Water  
Connection End  
• Provide access to water valves and fittings and screw-  
driver access to the unit side panels, discharge collar and  
all electrical connections.  
Return Air  
Drain  
NOTE: Correct placement of the horizontal unit can play an  
important part in minimizing sound problems. Since duct-  
work is normally applied to these units, the unit can be  
placed so that the principal sound emission is outside the oc-  
cupied space in sound-critical applications. A fire damper  
may be required by the local code if a fire wall is penetrated.  
a50-6257ef  
Back Discharge  
Discharge Air  
FIELD CONVERSION OF DISCHARGE AIR — The dis-  
charge air of the 50PCH horizontal units can be converted  
Fig. 6 — Conversion Right Return,  
Side Discharge to Back Discharge  
7
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Side to Back Discharge Conversion  
1. Remove screws to free the top and discharge panels. See  
Fig. 5.  
NOTE: Some codes require the use of a secondary drain pan  
under vertical units. Check local codes for more information.  
Step 5 — Check Duct System — Size the duct sys-  
2. Remove the access panel and set aside.  
tem to handle the design airflow quietly.  
3. Lift the discharge panel from side of unit and rotate it to  
back using care not to damage blower wiring.  
4. Check blower wire routing and connections for undue  
tension or contact with sheet metal edges. Re-route if  
necessary.  
5. Check refrigerant tubing for contact with other compo-  
nents. Adjust if necessary.  
6. Reinstall top panel using screws set aside in Step 1.  
NOTE: Location for some screws at bottom of discharge panel  
may have to be changed.  
7. Manually spin fan wheel to check for obstructions.  
Adjust for any obstruction found.  
NOTE: Depending on the unit, the fan wheel may have a ship-  
ping support installed at the factory. This must be removed  
before operating unit.  
SOUND ATTENUATION — To eliminate the transfer of  
vibration to the duct system, a flexible connector is recom-  
mended for both discharge and return air duct connections on  
metal duct systems. The supply and return plenums should in-  
clude internal duct liner of fiberglass or be made of duct board  
construction to maximize sound attenuation of the blower.  
Installing the WSHP unit to uninsulated ductwork in an uncon-  
ditioned space is not recommended since it will sweat and  
adversely affect the unit’s performance.  
To reduce air noise, at least one 90-degree elbow could be  
included in the supply and return air ducts, provided system  
performance is not adversely impacted. The blower speed can  
also be changed in the field to reduce air noise or excessive air-  
flow, provided system performance is not adversely impacted.  
8. Replace access panel.  
Back to Side Discharge Conversion — Follow instructions  
above for Side to Back Discharge Conversion, noting the  
panels would be reversed.  
EXISTING DUCT SYSTEM — If the unit is connected to  
existing ductwork, consider the following:  
• Verify that the existing ducts have the proper capacity to  
handle the unit airflow. If the ductwork is too small,  
install larger ductwork.  
Step 4 — Mount the Unit  
HORIZONTAL UNITS (50PCH) —Horizontal units should be  
mounted using the factory-installed hangers. Proper attachment  
of hanging rods to building structure is critical for safety. See  
Fig. 2 and 7. Rod attachments must be able to support the  
weight of the unit. See Table 1 for unit operating weights.  
• Check existing ductwork for leaks and repair as  
necessary.  
a50-8489  
NOTE: Local codes may require ventilation air to enter the  
space for proper indoor air quality. Hard-duct ventilation may  
be required for the ventilating air supply. If hard ducted venti-  
lation is not required, be sure that a proper air path is provided  
for ventilation air to unit to meet ventilation requirement of the  
space.  
COMPRESSOR  
SECTION  
AIR HANDLER  
SECTION  
Step 6 — Install Condensate Drain  
HORIZONTAL UNITS (50PCH) — Slope the unit toward  
the drain at a 1/4 in. drop at drain end. See Fig. 9. If it is not pos-  
sible to meet the required pitch, install a condensate pump at  
the unit to pump condensate to building drain.  
Fig. 7 — Horizontal Hanger Bracket  
(Factory Installed)  
VERTICAL UNITS (50PCV) — Vertical units are available in  
left or right return air configurations. See Fig. 3. Mount the unit  
on a vibration absorption pad slightly larger than the entire base  
to minimize vibration transmission. It is not necessary to mount  
the unit on the floor. See Fig. 8.  
1/4” Pitch for  
Drainage  
a50-6259ef  
Pitch Toward  
Drain  
a50-6260ef  
Drain Connection  
Fig. 9 — Horizontal Unit Pitch  
Horizontal units are not internally trapped, therefore an ex-  
ternal trap is necessary. Install each unit with its own individual  
trap and means to flush or blow out the condensate drain line.  
Do not install units with a common trap or vent. For typical  
condensate connections see Fig. 10.  
Vibration  
Absorption  
Pad  
NOTE: Never use a pipe size smaller than the connection.  
VERTICAL UNITS (50PCV) — Each unit uses a condensate  
hose inside all cabinets as a trapping loop, therefore an external  
trap is not necessary and should not be used. See Fig. 11.  
Fig. 8 — 50PCV Unit Mounted with  
Vibration Absorption Pad  
8
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• Insulation may be required on piping to avoid condensa-  
tion in the case where fluid in loop piping operates at  
temperatures below dew point of adjacent air.  
• Piping systems that contain steel pipes or fittings may  
be subject to galvanic corrosion. Dielectric fittings may  
be used to isolate the steel parts of the system to avoid  
galvanic corrosion.  
a50-6261tf  
WATER LOOP APPLICATIONS — Water loop applications  
usually include a number of units plumbed to a common pip-  
ing system. Maintenance to any of these units can introduce air  
into the piping system. Therefore, air elimination equipment  
comprises a major portion of the mechanical room plumbing.  
The flow rate is usually set between 2.25 and 3 gpm per ton  
of cooling capacity. For proper maintenance and servicing,  
pressure-temperature (P/T) ports are necessary for temperature  
and flow verification.  
NOTE: Trap should be deep enough to offset maximum unit static  
difference. A 4-in. trap is recommended.  
In addition to complying with any applicable codes, consid-  
er the following for system piping:  
Fig. 10 — Trap Condensate Drain  
• Piping systems using water temperatures below 50 F  
require 1/2-in. closed cell insulation on all piping surfaces  
to eliminate condensation.  
• Avoid all plastic to metal threaded fittings due to the  
potential to leak. Use a flange fitted substitute.  
• Teflon tape thread sealant is recommended to minimize  
internal fouling of the heat exchanger.  
3/4” Copper FPT/PVC  
3/4” PVC  
Vent  
a50-6262ef  
1/2”  
1/4” per foot  
slope to drain  
• Use backup wrench. Do not overtighten connections.  
• Route piping to avoid service access areas to unit.  
• Flush the piping system prior to operation to remove dirt  
and foreign materials from the system.  
GROUND-LOOP APPLICATIONS — Temperatures be-  
tween 25 and 110 F and a cooling capacity of 2.25 to 3 gpm of  
flow per ton is recommended. In addition to complying with  
any applicable codes, consider the following for system piping:  
1/2”  
Water  
Connections  
Alternate  
Condensate  
Location  
• Limit piping materials to only polyethylene fusion in the  
buried sections of the loop.  
NOTE: Unit does not need to be sloped toward drain.  
• Do not use galvanized or steel fittings at any time due to  
Fig. 11 — Vertical Condensate Connection  
corrosion.  
Each unit must be installed with its own individual vent and  
means to flush or blow out the condensate drain line. Do not in-  
stall units with a common trap or vent.  
VENTING — Install a vent in the condensate line of any  
application that may allow dirt or air to collect in the line. Con-  
sider the following:  
• Avoid all plastic to metal threaded fittings due to the poten-  
tial to leak. Use a flange fitted substitute.  
• Do not overtighten connections.  
• Route piping to avoid service access areas to unit.  
• Use pressure-temperature (P/T) plugs to measure flow of  
pressure drop.  
INSTALLATION OF SUPPLY AND RETURN HOSE  
KIT — Follow these piping guidelines.  
1. Install a drain valve at the base of each supply and return  
riser to facilitate system flushing.  
2. Install shutoff/balancing valves and unions at each unit to  
permit unit removal for servicing.  
3. Place strainers at the inlet of each system circulating  
pump.  
4. Select the proper hose length to allow slack between con-  
nection points. Hoses may vary in length by +2% to –4%  
under pressure.  
5. Refer to Table 2. Do not exceed the minimum bend radius  
for the hose selected. Exceeding the minimum bend radi-  
us may cause the hose to collapse, which reduces water  
flow rate. Install an angle adapter to avoid sharp bends  
in the hose when the radius falls below the required  
minimum.  
• Always install a vent where an application requires a  
long horizontal run.  
• Always install a vent where large units are working  
against higher external static pressure and to allow  
proper drainage for multiple units connected to the same  
condensate main.  
• Be sure to support the line where anticipated sagging from  
the condensate or when “double trapping” may occur.  
• If condensate pump is present on unit, be sure drain con-  
nections have a check valve to prevent back flow of con-  
densate into other units.  
Step 7 — Pipe Connections — Depending on the  
application, there are 3 types of WSHP piping systems to  
choose from: water loop, ground-water and ground loop. Refer  
to Piping Section of Carrier System Design Manual for addi-  
tional information.  
All WSHP units use low temperature soldered female pipe  
thread fittings for water connections to prevent annealing and  
out-of-round leak problems which are typically associated with  
high temperature brazed connections. Refer to Table 1 for con-  
nection sizes. When making piping connections, consider the  
following:  
NOTE: Piping must comply with all applicable codes.  
Table 2 — Metal Hose Minimum Bend Radii  
• Use a backup wrench when making screw connections to  
HOSE DIAMETER (in.)  
MINIMUM BEND RADII (in.)  
unit to prevent internal damage to piping.  
1
/
21/2  
2
3
/
4
4
1
51/2  
9
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Insulation is not required on loop water piping except where  
the piping runs through unheated areas or outside the building  
or when the loop water temperature is below the minimum ex-  
pected dew point of the pipe ambient. Insulation is required if  
loop water temperature drops below the dew point.  
Refer to unit wiring diagrams Fig. 13-20 for a schematic of  
the field connections, which must be made by the installing (or  
electrical) contractor. Refer to Table 3 for fuse sizes.  
Consult the unit wiring diagram located on the inside of the  
compressor access panel to ensure proper electrical hookup.  
The installing (or electrical) contractor must make the field  
connections when using field-supplied disconnect.  
IMPORTANT: Do not bend or kink supply lines or hoses.  
Operating voltage must be the same voltage and phase as  
shown in Table 3.  
Make all final electrical connections with a length of flexi-  
ble conduit to minimize vibration and sound transmission to  
the building.  
Pipe joint compound is not necessary when Teflon* thread-  
ed tape is pre-applied to hose assemblies or when flared-end  
connections are used. If pipe joint compound is preferred, use  
compound only in small amounts on the male pipe threads of  
the fitting adapters. Prevent sealant from reaching the flared  
surfaces of the joint.  
NOTE: When anti-freeze is used in the loop, assure that it is  
compatible with Teflon tape or pipe joint compound employed.  
Maximum allowable torque for brass fittings is 30 ft-lb. If a  
torque wrench is not available, tighten finger-tight plus one  
quarter turn. Tighten steel fittings as necessary.  
POWER CONNECTION — Make line voltage connection  
by connecting the incoming line voltage wires to the L side  
of the CC terminal as shown in Fig. 21. See Table 3 for cor-  
rect wire and maximum overcurrent protection sizing.  
SUPPLY VOLTAGE — Operating voltage to unit must be  
within voltage range indicated on unit nameplate.  
Optional pressure-rated hose assemblies designed specifi-  
cally for use with Carrier units are available. Similar hoses can  
be obtained from alternate suppliers. Supply and return hoses  
are fitted with swivel-joint fittings at one end to prevent kink-  
ing during installation.  
On 3-phase units, voltages under load between phases must  
be balanced within 2%. Use the following formula to deter-  
mine the percentage voltage imbalance:  
% Voltage Imbalance  
max voltage deviation from average voltage  
= 100 x  
CAUTION  
average voltage  
Example: Supply voltage is 460-3-60.  
Backup wrench is required when tightening water connec-  
tions to prevent water line damage. Failure to use a backup  
wrench could result in equipment damage.  
AB = 452 volts  
BC = 464 volts  
AC = 455 volts  
Refer to Fig. 12 for an illustration of a supply/return hose  
kit. Male adapters secure hose assemblies to the unit and risers.  
Install hose assemblies properly and check them regularly to  
avoid system failure and reduced service life.  
452 + 464 + 455  
Average Voltage =  
3
1371  
=
3
Swivel  
Brass  
Fitting  
A50-7734  
Brass  
Fitting  
= 457  
Rib Crimped  
Determine maximum deviation from average voltage:  
(AB) 457 – 452 = 5 v  
(BC) 464 – 457 = 7 v  
(AC) 457 – 455 = 2 v  
Maximum deviation is 7 v.  
Determine percent voltage imbalance.  
Length  
(2 ft Length Standard)  
MPT  
Fig. 12 — Supply/Return Hose Kit  
Step 8 — Wire Field Power Supply  
WARNING  
7
% Voltage Imbalance = 100 x  
457  
= 1.53%  
To avoid possible injury or death due to electrical shock,  
open the power supply disconnect switch and secure it in  
an open position during installation.  
This amount of phase imbalance is satisfactory as it is  
below the maximum allowable 2%.  
Operation on improper line voltage or excessive phase  
imbalance constitutes abuse and may cause damage to electri-  
cal components.  
CAUTION  
NOTE: If more than 2% voltage imbalance is present, contact  
your local electric utility.  
Use only copper conductors for field-installed electrical  
wiring. Unit terminals are not designed to accept other  
types of conductors. Failure to follow this safety precaution  
could lead to equipment damage.  
208-VOLT OPERATION — All 208-230 volt units are factory  
wired for 208 volts. The transformers may be switched to  
230-volt operation by switching the red (208 volt) wire with  
the orange (230 volt) wire at the L1 terminal.  
All field installed wiring, including the electrical ground,  
MUST comply with the National Electrical Code (NEC) as  
well as applicable local codes. In addition, all field wiring must  
conform to the Class II temperature limitations described in the  
NEC.  
460-VOLT OPERATION — Units using 460-v and internal  
secondary pump will require a neutral wire from the supply  
side in order to feed accessory with 265-v.  
*Registered trademark of E. I. du Pont de Nemours and Company.  
10  
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A50-8697  
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A50-8698  
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a50-8380  
D B  
8
7
6
4
5 3  
1
2
1
D
L E  
1
2
4
3
1
2
3
2
4
1
9
7
6
8
3
2
4
1
9
7
6
8
G n d  
n e R t +  
N
E E G R  
W H I T E  
t - R n e  
B L A C K  
R E D  
V
+ 1 2  
To WSHP Controller  
Rnet Terminals (J13)  
18  
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Table 3 — 50PCH,PCV Unit Electrical Data  
COMPRESSOR  
STANDARD UNITS  
UNITS WITH HIGH-STATIC BLOWER  
RATED  
VOLTAGE  
V-Ph-Hz*  
50PCH,PCV VOLTAGE  
VOLTAGE  
MIN/MAX  
Fan Motor Total Unit Min Circuit Max Fuse/ Fan Motor Total Unit Min Circuit Max Fuse/  
UNIT  
006  
009  
012  
015  
018  
024  
CODE  
QTY  
RLA  
LRA  
FLA  
0.40  
0.40  
0.80  
0.70  
0.80  
0.70  
1.00  
0.86  
1.00  
0.86  
1.50  
1.30  
3.00  
2.70  
3.00  
1.70  
1.80  
2.00  
1.80  
1.24  
3.00  
3.00  
1.70  
1.40  
3.40  
3.40  
1.80  
1.40  
4.90  
4.90  
2.50  
1.90  
FLA  
3.7  
AMP  
4.5  
HACR  
15  
15  
15  
15  
15  
15  
15  
15  
15  
15  
30  
20  
30  
25  
20  
15  
35  
30  
25  
15  
40  
30  
15  
15  
50  
30  
15  
15  
60  
40  
20  
15  
FLA  
FLA  
AMP  
HACR  
—
—
—
—
—
—
15  
15  
15  
15  
30  
20  
30  
25  
20  
15  
40  
30  
25  
15  
40  
30  
15  
15  
50  
35  
15  
15  
60  
40  
20  
15  
3
4
3
4
3
4
3
4
3
4
3
4
3
4
5
6
3
4
5
6
3
5
6
1
3
5
6
1
3
5
6
1
208/230-1-60 197/254  
265-1-60 239/292  
208/230-1-60 197/254  
265-1-60 239/292  
208/230-1-60 197/254  
265-1-60 239/292  
208/230-1-60 197/254  
265-1-60 239/292  
208/230-1-60 197/254  
265-1-60 239/292  
208/230-1-60 197/254  
265-1-60 239/292  
208/230-1-60 197/254  
265-1-60 239/292  
208/230-3-60 197/254  
460-3-60 414/506  
208/230-1-60 197/254  
265-1-60 239/292  
208/230-3-60 197/254  
460-3-60 414/506  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3.3  
2.9  
17.7  
13.5  
22.2  
18.8  
32.5  
31.5  
29.0  
28.0  
33.0  
28.0  
58.3  
54.0  
73.0  
60.0  
58.0  
28.0  
79.0  
72.0  
73.0  
38.0  
—
—
—
3.3  
4.0  
—
—
—
5.6  
6.4  
7.8  
—
—
—
3.8  
4.5  
5.5  
—
—
—
5.1  
5.9  
7.2  
—
—
—
4.0  
4.7  
5.7  
—
—
—
6.0  
7.0  
8.5  
1.00  
0.86  
1.50  
1.30  
3.00  
2.70  
3.00  
2.70  
3.00  
1.70  
3.00  
2.70  
3.00  
1.70  
3.00  
3.00  
1.70  
1.40  
4.90  
4.90  
2.50  
1.90  
5.80  
5.80  
2.60  
2.30  
7.0  
8.5  
5.4  
6.3  
7.6  
6.3  
7.6  
7.2  
8.2  
10.0  
8.2  
8.7  
10.5  
8.7  
5.9  
6.8  
7.2  
12.8  
9.6  
14.3  
10.9  
17.1  
13.9  
11.9  
5.9  
17.5  
13.3  
20.6  
16.7  
14.1  
7.0  
15.8  
12.3  
17.1  
13.9  
11.9  
5.9  
19.0  
14.7  
20.6  
16.7  
14.1  
7.0  
14.1  
11.2  
8.9  
030  
036  
042  
048  
060  
4.2  
16.7  
13.5  
10.4  
5.8  
18.5  
15.5  
12.2  
7.0  
22.7  
18.9  
14.8  
8.5  
19.7  
16.2  
13.4  
7.5  
23.9  
19.6  
16.0  
9.0  
208/230-1-60 197/254  
208/230-3-60 197/254  
17.9 112.0  
20.9  
16.5  
7.7  
25.4  
19.9  
9.2  
20.9  
16.5  
7.7  
25.4  
19.9  
9.2  
13.5  
6.0  
88.0  
44.0  
34.0  
460-3-60  
575-3-60  
414/506  
518/633  
4.9  
6.3  
7.5  
6.3  
7.5  
208/230-1-60 197/254  
208/230-3-60 197/254  
21.8 117.0  
25.2  
17.1  
8.0  
30.7  
20.5  
9.6  
26.7  
18.6  
8.7  
32.2  
22.0  
10.3  
7.9  
13.7  
6.2  
83.1  
41.0  
33.0  
460-3-60  
575-3-60  
414/506  
518/633  
4.8  
6.2  
7.4  
6.7  
208/230-1-60 197/254  
208/230-3-60 197/254  
26.3 134.0  
15.6 110.0  
31.2  
20.5  
10.3  
7.7  
37.8  
24.4  
12.3  
9.2  
32.1  
21.4  
10.4  
8.1  
38.7  
25.3  
12.4  
9.6  
460-3-60  
575-3-60  
414/506  
518/633  
7.8  
5.8  
52.0  
38.9  
LEGEND  
Full Load Amps  
*Units using 460-v and ECM (electronically commutated motor), modulating  
HWR (hot water reheat), and/or internal secondary pump will require a neutral  
wire from the supply side in order to feed accessory with 265-v.  
FLA  
—
—
—
—
HACR  
LRA  
Heating, Air Conditioning and Refrigeration  
Locked Rotor Amps  
NOTES:  
1. HACR circuit breaker in U.S.A. only.  
2. All fuses  
RLA  
Rated Load Amps  
3. Class RK-5.  
a50-8162  
Fig. 21 — Typical Single-Phase Line Voltage Power Connection  
19  
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Step 9 — Wire Field Controls  
THERMOSTAT CONNECTIONS — The thermostat  
should be wired directly to the Aquazone™ control board. See  
Fig. 13-20, and 22.  
TERMINAL STRIP P2  
C
CAPACITOR  
TYPICAL  
WATER  
VALVE  
COMPLETE C CONTROL  
COMPRESSOR CONTACTOR  
24 VAC  
A
LINE  
A D  
a50-6269ef  
L O  
J1  
Fig. 24 — Typical Deluxe D Control  
Accessory Wiring  
S1  
W
O
CFM  
SW1  
TRANSFORMER  
SW2  
SW3  
SW4  
SW5  
SW6  
SW7  
SW8  
SW9  
Y2  
Y1  
G
WATER SOLENOID VALVES — An external solenoid  
valve(s) should be used on ground water installations to shut  
off flow to the unit when the compressor is not operating. A  
slow closing valve may be required to help reduce water  
hammer. Figure 24 shows typical wiring for a 24-vac external  
solenoid valve. Figures 25 and 26 illustrate typical slow closing  
water control valve wiring for Taco 500 Series and Taco ESP  
Series valves. Slow closing valves take approximately 60 sec.  
to open (very little water will flow before 45 sec.). Once fully  
open, an end switch allows the compressor to be energized (on-  
ly on valves with end switches). Only relay or triac based elec-  
tronic thermostats should be used with slow closing valves.  
When wired as shown, the slow closing valve will operate  
properly with the following notations:  
ON  
OFF  
DEHUM  
a50-8197  
TB1  
R
C
Y2 Y1  
G
O
W
C
R
DH AL1  
A
A
AL1  
THERMOSTAT CONNECTION  
NOTE: Low voltage connector may be removed for easy installation.  
Fig. 22 — Low Voltage Field Wiring  
WATER FREEZE PROTECTION — The Aquazone control  
allows the field selection of source fluid freeze protection  
points through jumpers. The factory setting of jumper JW3  
(FP1) is set for water at 30 F. In earth loop applications, jumper  
JW3 should be clipped to change the setting to 10 F when  
using antifreeze in colder earth loop applications. See Fig. 23.  
1. The valve will remain open during a unit lockout.  
2. The valve will draw approximately 25 to 35 VA through  
the “Y” signal of the thermostat.  
IMPORTANT: Connecting a water solenoid valve can  
overheat the anticipators of electromechanical thermo-  
stats. Only use relay based electronic thermostats.  
a50-8441  
2
AMV  
TACO VALVE  
3
1
HEATER SWITCH  
a50-6268tf  
THERMOSTAT  
Fig. 23 — Typical Aquazone Control Board  
Jumper Locations (Complete C Control Shown)  
Fig. 25 — AMV Valve Wiring  
AIR COIL FREEZE PROTECTION — The air coil freeze  
protection jumper JW2 (FP2) is factory set for 30 F and should  
not need adjusting.  
ACCESSORY CONNECTIONS — Terminal A on the control  
is provided to control accessory devices such as water valves,  
electronic air cleaners, humidifiers, etc. This signal operates  
with the compressor terminal. See Fig. 24. Refer to the specific  
unit wiring schematic for details.  
a50-8442  
NOTE: The A terminal should only be used with 24 volt  
signals — not line voltage signals.  
Fig. 26 — Taco SBV Valve Wiring  
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WSHP OPEN WIRING — The WSHP Open controller will  
be factory wired to the Complete C or Deluxe D control board,  
however, the system wiring will need to be completed utilizing  
WSHP Open controller wiring diagrams and the Third Party  
Integration (TPI) Guide. Factory installation includes harness,  
LWT (leaving water temperature), supply air, and condensate  
sensor.  
Table 5 — SPT Sensors  
PART  
NUMBER  
SENSOR  
FEATURES  
SPT  
Standard  
• Local access port  
• No operator control  
SPS  
• Slide potentiometer to adjust set point  
• Manual on button to override schedule  
• LED to show occupied status  
• Local access port  
SPT Plus  
SPT Pro  
SPPL  
SPP  
WARNING  
• LCD display  
• Manual on button to override schedule  
• Warmer and cooler buttons to adjust set  
point  
Disconnect all power to the unit before performing mainte-  
nance or service. Unit may automatically start if power is  
not disconnected. Failure to follow this warning could  
cause personal injury, death, and/or equipment damage.  
• Info button to cycle through zone and  
outside air temperatures, set points, and  
local override time  
• Local access port  
Wiring Sensors to Inputs — Sensors can be wired to the  
WSHP Open controller’s inputs. See Table 4.  
All field control wiring that connects to the WSHP Open con-  
troller must be routed through the raceway built into the corner  
post. The raceway provides the UL required clearance between  
high and low-voltage wiring.  
1. Pass control wires through the hole provided in the corner  
post.  
2. Feed the wires through the raceway to the WSHP Open  
controller.  
3. Connect the wires to the removable Phoenix connectors.  
4. Reconnect the connectors to the board.  
Field-Supplied Sensor Hardware — The WSHP Open con-  
troller is configurable with the following field-supplied sen-  
sors. See Table 4.  
• LCD display  
• Manual on button to override schedule  
• Warmer and cooler buttons to adjust set  
point  
• Info button to cycle through zone and  
outside air temperatures, set points, and  
local override time  
• Local access port  
• Fan speed*  
SPT Pro  
Plus  
SPPF  
*The SPT Pro Plus fan speed adjustment has no effect in this  
application.  
Table 6 — Rnet Wiring Specifications  
RNET WIRING SPECIFICATIONS  
4 conductor, unshielded, CMP,  
Description  
plenum rated cable  
Conductor  
Maximum Length  
18 AWG  
500 ft  
Jacket: white  
Table 4 — Field-Supplied Sensors for  
WSHP Open Controller  
Recommended Coloring  
Wiring: black, white, green, red  
UL Temperature  
Voltage  
32 to 167 F  
300-vac, power limited  
UL: NEC CL2P, or better  
SENSOR  
NOTES  
Space Temperature Sensor  
(SPT)  
Field Installed (Must be used with  
WSHP Open controller.)  
Listing  
LEGEND  
Outdoor Air  
Temperature Sensor  
Network Sensor  
AWG — American Wire Gage  
CMP — Communications Plenum Cable  
NEC — National Electrical Code  
Indoor Air Quality Sensor  
(Separate Sensor)  
Required only for demand  
control ventilation.  
UL  
— Underwriters Laboratories  
Space Relative Humidity  
Sensor  
Separate Sensor  
To wire the SPT sensor to the controller:  
NOTE: BACview6 Handheld or Virtual BACview can be used as the  
user interface.  
1. Partially cut, then bend and pull off the outer jacket of the  
Rnet cable(s), being careful not to nick inner insulation.  
For specific details about sensors, refer to the literature sup-  
plied with the sensor.  
2. Strip about 1/4 in. of the inner insulation from each wire.  
See Fig. 27.  
Wiring a SPT Sensor — A WSHP Open controller is connect-  
ed to a wall-mounted space temperature (SPT) sensor to moni-  
tor room temperature using a Molex plug.  
OUTER JACKET  
The WSHP Open system offers the following SPT sensors.  
See Table 5.  
Wire SPT sensors to the WSHP Open controller’s Rnet  
port. An Rnetbus can consist of any of the following combina-  
tions of devices wired in a daisy-chain configuration:  
a50-8443  
.25 IN.  
INNER INSULATION  
Fig. 27 — Rnet Cable Wire  
3. Wire each terminal on the sensor to the same terminal on  
the controller. See Fig. 18-20. Table 7 shows the recom-  
mended Rnet wiring scheme.  
• 1 SPT Plus, SPT Pro, or SPT Pro Plus sensors  
• 1 to 4 SPT Standard sensors  
• 1 to 4 SPT Standard sensors and 1 SPT Plus, SPT Pro, or  
SPT Pro Plus sensor  
Table 7 — Rnet Wiring  
• Any of the above combinations, plus up to 2 BACview6  
Handheld but no more than 6 total devices  
WIRE  
Red  
TERMINAL  
+12-v  
NOTE: If the Rnetbus has multiple SPT Standard sensors, each  
sensor must be given a unique address on the Rnetbus. See the  
Carrier Open Sensor Installation Guide.  
Use the specified type of wire and cable for maximum signal  
integrity. See Table 6.  
Black  
White  
Green  
.Rnet–  
Rnet+  
Gnd  
NOTE: The wire should be connected to the terminal shown.  
21  
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Wiring a Supply Air Temperature (SAT) Sensor  
SAT sensor is required for reheat applications.  
—
The  
2. Fuses, breakers and wire are correct size.  
3. Low voltage wiring is complete.  
If the cable used to wire the SAT sensor to the controller  
will be less than 100 ft, an unshielded 22 AWG (American  
Wire Gage) cable should be used. If the cable will be greater  
than 100 ft, a shield 22 AWG cable should be used. The cable  
should have a maximum length of 500 ft.  
4. Piping and system flushing is complete.  
5. Air is purged from closed loop system.  
6. System is balanced as required. Monitor if necessary.  
7. Isolation valves are open.  
To wire the SAT sensor to the controller:  
1. Wire the sensor to the controller. See Fig. 18-20.  
2. Verify that the Enable SAT jumper is on.  
3. Verify that the Enable SAT and Remote jumper is in the  
left position.  
8. Water control valves or loop pumps are wired.  
9. Condensate line is open and correctly pitched.  
10. Transformer switched to lower voltage tap if necessary.  
11. Blower rotates freely — shipping support is removed.  
12. Blower speed is on correct setting.  
13. Air filter is clean and in position.  
14. Service/access panels are in place.  
15. Return-air temperature is between 40 to 80 F heating and  
50 to 110 F cooling.  
16. Air coil is clean.  
Wiring an Indoor Air Quality (IAQ) Sensor  
—
An IAQ  
sensor monitors CO2 levels. The WSHP Open controller uses  
this information to adjust the outside-air dampers to provide  
proper ventilation. An IAQ sensor can be wall-mounted or  
mounted in a return air duct. (Duct installation requires an aspi-  
rator box assembly.)  
The sensor has a range of 0 to 2000 ppm and a linear 4 to  
20 mA output. This is converted to 1 to 5 vdc by a 250-ohm,  
1/4 watt, 2% tolerance resistor connected across the zone con-  
troller’s IAQ input terminals.  
NOTE: Do not use a relative humidity sensor and CO2 sensor  
on the same zone controller if both sensors are powered off the  
board. If sensors are externally powered, both sensors may be  
used on the same zone controller.  
If the cable used to wire the IAQ sensor to the controller  
will be less than 100 ft, an unshielded 22 AWG (American  
Wire Gage) cable should be used. If the cable will be greater  
than 100 ft, a shield 22 AWG cable should be used. The cable  
should have a maximum length of 500 ft.  
17. Control field-selected settings are correct.  
AIR COIL — To obtain maximum performance, clean the air  
coil before starting the unit. A ten percent solution of dish-  
washer detergent and water is recommended for both sides of  
the coil. Rinse thoroughly with water.  
PSC (Permanent Split Capacitor) Blower  
Speed Selection — The PSC blower fan speed can be  
changed by moving the blue wire on the fan motor terminal  
block to the desired speed as shown in Fig. 28. The 50PC units  
are designed to deliver rated airflow at nominal static (0.15 in.  
wg) on medium speed (factory setting) and rated airflow at a  
higher static (0.4 to 0.5 in. wg) on high speed for applications  
where higher static is required. Low speed will deliver approx-  
imately 85% of rated airflow at 0.10 in. wg. An optional ‘high  
static’ blower is available by using the special option code in  
the model nomenclature.  
To wire the IAQ sensor to the controller:  
1. Wire the sensor to the controller. See Fig. 18-20.  
1
2. Install a field-supplied 250-ohm, /4 watt, 2% tolerance  
resistor across the controller’s RH/IAQ and Gnd  
terminals.  
NOTE: Blower performance is shown in Tables 8-10.  
CONNECT THE BLUE WIRE TO:  
H FOR HIGH SPEED FAN  
M FOR MEDIUM SPEED FAN  
L FOR LOW SPEED FAN  
3. Verify the the RH/IAQ jumper is set to 0 to 5-vdc.  
Wiring a Relative Humidity (RH) Sensor — The RH sensor  
is used for zone humidity control (dehumidification) if the  
WSHP unit has a dehumidification device. If not, the sensor  
only monitors humidity.  
BLU  
NOTE: Do not use a relative humidity sensor and CO2 sensor  
on the same zone controller if both sensors are powered off the  
board. If sensors are externally powered, both sensors may be  
used on the same zone controller.  
MEDIUM FACTORY SETTING  
a50-6805ef  
M
L
H
If the cable used to wire the RH sensor to the controller will  
be less than 100 ft, an unshielded 22 AWG (American Wire  
Gage) cable should be used. If the cable will be greater than  
100 ft, a shield 22 AWG cable should be used. The cable  
should have a maximum length of 500 ft.  
FAN MOTOR  
Fig. 28 — Blower Speed Selection  
To wire the RH sensor to the controller:  
1. Strip the outer jacket from the cable for at least 4 inches.  
2. Strip 1/4 in. of insulation from each wire.  
3. Wire the sensor to the controller.  
Table 8 — 50PCV Blower Performance with  
Wet Coil  
COIL FACE VELOCITY  
(fpm)  
WET COIL REDUCTION  
(in. wg)  
PRE-START-UP  
200  
250  
300  
350  
400  
450  
500  
0.030  
0.055  
0.080  
0.100  
0.120  
0.140  
0.160  
System Checkout — When the installation is complete,  
follow the system checkout procedure outlined below before  
starting up the system. Be sure:  
1. Voltage is within the utilization range specifications of the  
unit compressor and fan motor and voltage is balanced  
for 3 phase units.  
22  
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Table 9 — 50PCH,PCV Blower Performance — Standard Unit  
AIRFLOW (cfm) AT EXTERNAL STATIC PRESSURE (in. wg)  
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 1.00  
50PCH,  
PCV  
FAN  
SPEED  
RATED  
AIRFLOW  
MIN  
CFM  
Hi  
310  
260  
210  
410  
390  
340  
470  
420  
360  
745  
666  
588  
300  
250  
200  
400  
370  
330  
460  
410  
360  
725  
657  
578  
290  
240  
190  
380  
360  
322  
450  
400  
350  
706  
647  
568  
280  
230  
180  
360  
340  
310  
440  
390  
340  
696  
637  
559  
270  
210  
160  
350  
320  
300  
430  
380  
320  
686  
617  
549  
250  
200  
150  
330  
310  
280  
420  
370  
320  
666  
608  
529  
230  
190  
210  
150  
180  
006  
009  
012  
015  
018  
024  
030  
036  
042  
048  
060  
Med  
Low  
220  
325  
150  
225  
300  
375  
450  
600  
750  
900  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
320  
290  
260  
400  
360  
310  
637  
588  
510  
637  
588  
510  
300  
280  
250  
390  
350  
300  
588  
549  
480  
588  
549  
480  
280  
260  
380  
340  
320  
451  
451  
400  
539  
510  
451  
539  
510  
451  
884  
789  
665  
525  
686  
608  
676  
598  
745  
666  
588  
725  
657  
578  
706  
647  
568  
696  
637  
559  
686  
617  
549  
666  
608  
529  
600  
686  
608  
676  
598  
950  
836  
694  
922  
817  
684  
827  
732  
618  
903  
846  
751  
732  
665  
656  
800  
960  
779  
950  
770  
941  
760  
931  
751  
912  
741  
893  
732  
874  
722  
855  
713  
1102 1074 1045 1017 979  
798  
1000  
1200  
1350  
1600  
2000  
1188 1169 1140 1121 1093 1064 1036 1017 988  
1064 1045 1017 998 979 960 931 912 884  
960  
855  
922  
827  
1474 1455 1436 1416 1387 1358 1329 1310 1280 1232 1174 1077 931  
1174 1164 1106 1106 1096 1096 1086 1077 1067 1038 1009 912  
980  
980  
970  
970  
960  
960  
951  
951  
941  
922  
902  
1558 1530 1501 1473 1444 1416 1378 1340 1302 1264 1226 1131  
1050 1416 1397 1368 1349 1321 1302 1273 1245 1207 1169 1131 1064  
1083 1083 1074 1074 1064 1055  
1881 1853 1815 1767 1710 1653 1596 1416 1216 1216  
1200 1843 1824 1805 1786 1767 1729 1682 1653 1625 1577 1520 1340  
1682 1663 1644 1625 1606 1587 1568 1530 1492 1435 1378 1264  
2195 2195 2185 2176 2156 2117 2078 2048 2019 1999 1970 1921 1842 1754 1627  
1500 2009 2009 1999 1980 1950 1931 1901 1882 1852 1823 1793 1744 1676 1588  
1813 1813 1803 1793 1774 1764 1744 1725 1695 1666 1637 1588  
Hi  
Med  
Low  
Hi  
Med  
Low  
NOTES:  
3. All airflow is rated and shown above at lowest voltage if unit is dual volt-  
1. Shaded areas denote ESP (external static pressure) where operation is  
age rated, i.e., 208-v for 208/230-v units.  
not recommended.  
4. Only two-speed fan (Hi and Med) available on 575-v units.  
5. Performance stated is at the rated power supply. Performance may vary  
as the power supply varies from the rated.  
2. Units factory shipped on medium speed. Other speeds require field  
selection.  
Table 10 — 50PCH,PCV Blower Performance — High-Static Unit  
AIRFLOW (cfm) AT EXTERNAL STATIC PRESSURE (in. wg)  
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 1.00  
50PCH,  
PCV  
FAN  
SPEED  
RATED  
AIRFLOW  
MIN  
CFM  
Hi  
774  
696  
617  
774  
696  
617  
764  
686  
608  
764  
686  
608  
755  
676  
598  
755  
676  
598  
745  
657  
588  
745  
657  
588  
735  
657  
578  
735  
657  
578  
715  
647  
568  
715  
647  
568  
696  
637  
568  
696  
637  
568  
676  
617  
559  
676  
617  
559  
979  
922  
827  
637  
588  
519  
637  
588  
519  
903  
846  
751  
519  
480  
015  
018  
024  
030  
036  
042  
048  
060  
Med  
Low  
525  
600  
375  
450  
600  
750  
900  
735  
657  
725  
647  
706  
627  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
Hi  
Med  
Low  
519  
480  
735  
657  
725  
647  
706  
627  
789  
713  
675  
874  
779  
665  
760  
800  
988  
884  
960  
855  
979  
941  
960  
931  
931  
912  
912  
893  
1102 988  
1074 1026 979 884  
865 836 798  
1000  
1200  
1350  
1600  
2000  
998  
988  
979  
960  
1484 1455 1426 1358 1251 1135 931  
1319 1310 1300 1290 1280 1271 1261 1242 1222 1213 1193 1116 1038  
999 989 980 980 970 970 960 951 931 922 902  
1473 1463 1444 1425 1397 1387 1378 1311 1178  
1050 1321 1311 1302 1292 1283 1273 1254 1245 1235 1216 1188 1121  
1957 1938 1910 1862 1786 1701 1577 1435  
1200 1948 1948 1938 1919 1891 1872 1843 1824 1796 1767 1739 1691 1625 1539 1416 1254  
1758 1758 1748 1739 1720 1710 1691 1672 1644 1615 1587 1520 1435 1311  
2352 2352 2342 2332 2323 2313 2293 2274 2254 225 2195 2156 2087 2019 1940 1852  
1500 2117 2117 2107 2107 2097 2068 2038 2019 1999 1989 1980 1940 1891 1842 1460 1715  
1891 1891 1882 1882 1872 1862 1852 1852 1842 1833 1813 1793 1764 1715 1666 1588  
NOTES:  
3. All airflow is rated and shown above at lowest voltage if unit is dual volt-  
1. Shaded areas denote ESP (external static pressure) where operation is  
age rated, i.e., 208-v for 208/230-v units.  
not recommended.  
4. Only two-speed fan (Hi and Med) available on 575-v units.  
5. Performance stated is at the rated power supply. Performance may vary  
as the power supply varies from the rated.  
2. Units factory shipped on medium speed. Other speeds require field  
selection.  
23  
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DIP SWITCH BLOCK 1 (S1) — This set of switches offers  
the following options for Deluxe D control configuration:  
Performance Monitor (PM) — Set switch 1 to enable or dis-  
able performance monitor. To enable the PM, set the switch to  
ON. To disable the PM, set the switch to OFF.  
FIELD SELECTABLE INPUTS  
Jumpers and DIP (dual in-line package) switches on the  
control board are used to customize unit operation and can be  
configured in the field.  
IMPORTANT: Jumpers and DIP switches should only  
be clipped when power to control board has been turned  
off.  
Compressor Relay Staging Operation — Switch 2 will en-  
able or disable compressor relay staging operation. The com-  
pressor relay can be set to turn on with stage 1 or stage 2 call  
from the thermostat. This setting is used with dual stage units  
(units with 2 compressors and 2 Deluxe D controls) or in mas-  
ter/slave applications. In master/slave applications, each com-  
pressor and fan will stage according to its switch 2 setting.  
If switch is set to stage 2, the compressor will have a 3-sec-  
ond delay before energizing during stage 2 demand.  
NOTE: If DIP switch is set for stage 2, the alarm relay will not  
cycle during Test mode.  
Complete C Control Jumper Settings (Refer to  
Fig. 13 and 16)  
WATER COIL FREEZE PROTECTION (FP1) LIMIT  
SETTING — Select jumper 3, (JW3-FP1 Low Temp) to  
choose FP1 limit of 10 F or 30 F. To select 30 F as the limit,  
DO NOT clip the jumper. To select 10 F as the limit, clip the  
jumper.  
Heating/Cooling Thermostat Type — Switch 3 provides selec-  
tion of thermostat type. Heat pump or heat/cool thermostats  
can be selected. Select OFF for heat/cool thermostats. When in  
heat/cool mode, Y1 is used for cooling stage 1, Y2 is used for  
cooling stage 2, W1 is used for heating stage 1 and O/W2 is  
used for heating stage 2. Select ON for heat pump applications.  
In heat pump mode, Y1 used is for compressor stage 1, Y2 is  
used for compressor stage 2, W1 is used for heating stage 3 or  
emergency heat, and O/W2 is used for RV (heating or cooling)  
depending upon switch 4 setting.  
O/B Thermostat Type — Switch 4 provides selection for heat  
pump O/B thermostats. O is cooling output. B is heating out-  
put. Select ON for heat pumps with O output. Select OFF for  
heat pumps with B output.  
AIR COIL FREEZE PROTECTION (FP2) LIMIT SET-  
TING — Select jumper 2 (JW2-FP2 Low Temp) to choose  
FP2 limit of 10 F or 30 F. To select 30 F as the limit, DO NOT  
clip the jumper. To select 10 F as the limit, clip the jumper.  
ALARM RELAY SETTING — Select jumper 1 (JW1-AL2  
Dry) for connecting alarm relay terminal (AL2) to 24 vac (R)  
or to remain as a dry contact (no connection). To connect AL2  
to R, do not clip the jumper. To set as dry contact, clip the  
jumper.  
Complete C Control DIP Switches — The Con-  
plete C control has 1 DIP switch block with two switches.  
Refer to Fig. 13 and 16.  
PERFORMANCE MONITOR (PM) — DIP switch 1 will  
enable or disable this feature. To enable the PM, set the switch  
to ON. To disable the PM, set the switch to OFF.  
STAGE 2 — DIP switch 2 will enable or disable compressor  
delay. Set DIP switch to OFF for stage 2 in which the compres-  
sor will have a 3-second delay before energizing.  
Dehumidification Fan Mode — Switch 5 provides selection  
of normal or dehumidification fan mode. Select OFF for dehu-  
midification mode. The fan speed relay will remain OFF dur-  
ing cooling stage 2. Select ON for normal mode. The fan speed  
relay will turn on during cooling stage 2 in normal mode.  
NOTE: The alarm relay will not cycle during Test mode if  
switch is set to OFF, stage 2.  
Switch 6 — Not used.  
Boilerless Operation — Switch 7 provides selection of boil-  
erless operation and works in conjunction with switch 8. In  
boilerless operation mode, only the compressor is used for  
heating when FP1 is above the boilerless changeover tempera-  
ture set by switch 8 below. Select ON for normal operation or  
select OFF for boilerless operation.  
Boilerless Changeover Temperature — Switch 8 on S1 pro-  
vides selection of boilerless changeover temperature set point.  
Select OFF for set point of 50 F or ON for set point of 40 F.  
If switch 8 is set for 50 F, then the compressor will be used  
for heating as long as the FP1 is above 50 F. The compressor  
will not be used for heating when the FP1 is below 50 F and the  
compressor will operates in emergency heat mode, staging on  
EH1 and EH2 to provide heat. If a thermal switch is being used  
instead of the FP1 thermistor, only the compressor will be used  
for heating mode when the FP1 terminals are closed. If the FP1  
terminals are open, the compressor is not used and the control  
goes into emergency heat mode.  
Deluxe D Control Jumper Settings (Refer to  
Fig. 14, 15, and 17)  
WATER COIL FREEZE PROTECTION (FP1) LIMIT  
SETTING — Select jumper 3, (JW3-FP1 Low Temp) to  
choose FP1 limit of 10 F or 30 F. To select 30 F as the limit,  
DO NOT clip the jumper. To select 10 F as the limit, clip the  
jumper.  
AIR COIL FREEZE PROTECTION (FP2) LIMIT SET-  
TING — Select jumper 2 (JW2-FP2 Low Temp) to choose  
FP2 limit of 10 F or 30 F. To select 30 F as the limit, DO NOT  
clip the jumper. To select 10 F as the limit, clip the jumper.  
ALARM RELAY SETTING — Select jumper 4 (JW4-AL2  
Dry) for connecting alarm relay terminal (AL2) to 24 vac (R)  
or to remain as a dry contact (no connection). To connect AL2  
to R, do not clip the jumper. To set as dry contact, clip the  
jumper.  
LOW PRESSURE SETTING — The Deluxe D control can  
be configured for Low Pressure Setting (LP). Select jumper 1  
(JW1-LP Norm Open) for choosing between low pressure in-  
put normally open or closed. To configure for normally closed  
operation, do not clip the jumper. To configure for normally  
open operation, clip the jumper.  
DIP SWITCH BLOCK 2 (S2) — This set of DIP switches is  
used to configure accessory relay options. Refer to Fig. 14, 15,  
and 17.  
Switches 1 to 3 — These DIP switches provide selection  
of Accessory 1 relay options. See Table 11 for DIP switch  
combinations.  
Deluxe D Control DIP Switches — The Deluxe D  
control has 2 DIP switch blocks. Each DIP switch block has 8  
switches and is labeled either S1 or S2 on the circuit board.  
Refer to Fig. 14, 15, and 17.  
Switches 4 to 6 — These DIP switches provide selection  
of Accessory 2 relay options. See Table 12 for DIP switch  
combinations.  
24  
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Table 11 — DIP Switch Block S2 —  
Accessory 1 Relay Options  
Outside Air Damper (OAD) — If relay is configured  
for OAD, the relay will normally be ON any time the Fan  
Enable relay is energized. The relay will not start for  
30 minutes following a return to normal mode from NSB,  
when NSB is no longer connected to ground C. After 30 min-  
utes, the relay will start if the Fan Enable is set to ON.  
DIP SWITCH POSITION  
ACCESSORY 1  
RELAY OPTIONS  
1
2
3
Cycle with Fan  
Digital NSB  
Water Valve — Slow Opening  
OAD  
On  
Off  
On  
On  
On  
On  
Off  
On  
On  
On  
On  
Off  
CAUTION  
LEGEND  
To avoid equipment damage, DO NOT leave system filled  
in a building without heat during the winter unless anti-  
freeze is added to system water. Condenser coils never  
fully drain by themselves and will freeze unless winterized  
with antifreeze.  
NSB  
OAD  
—
—
Night Setback  
Outside Air Damper  
NOTE: All other DIP switch combinations are invalid.  
Table 12 — DIP Switch Block S2 —  
Accessory 2 Relay Options  
START-UP  
DIP SWITCH POSITION  
ACCESSORY 2  
RELAY OPTIONS  
4
5
6
Use the procedure outlined below to initiate proper unit  
start-up.  
NOTE: This equipment is designed for indoor installation only.  
Cycle with Fan  
Digital NSB  
Water Valve — Slow Opening  
OAD  
On  
Off  
On  
On  
On  
On  
Off  
On  
On  
On  
On  
Off  
Operating Limits  
LEGEND  
ENVIRONMENT — This equipment is designed for indoor  
installation ONLY. Extreme variations in temperature, hu-  
midity and corrosive water or air will adversely affect the  
unit performance, reliability and service life.  
NSB  
OAD  
—
—
Night Setback  
Outside Air Damper  
NOTE: All other switch combinations are invalid.  
POWER SUPPLY — A voltage variation of ± 10% of  
nameplate utilization voltage is acceptable.  
UNIT STARTING CONDITIONS — Depending on the  
model, units start and operate in an ambient temperature of  
45 F with entering-air temperature at 40 F or 50 F, entering-  
water temperature at 20 F or 50 F and with both air and water at  
the flow rates used.  
Auto Dehumidification Mode or High Fan Mode — Switch 7  
provides selection of auto dehumidification fan mode or high  
fan mode. In auto dehumidification fan mode the fan speed  
relay will remain off during cooling stage 2 if terminal H is  
active. In high fan mode, the fan enable and fan speed relays  
will turn on when terminal H is active. Set the switch to ON for  
auto dehumidification fan mode or to OFF for high fan mode.  
NOTE: These operating limits are not normal or continuous  
operating conditions. Assume that such a start-up is for the  
purpose of bringing the building space up to occupancy  
temperature. See Table 14 for operating limits.  
Switch 8 — Not used.  
Deluxe D Control Accessory Relay Configura-  
tions — The following accessory relay settings are applica-  
ble for both Deluxe D controls only:  
CYCLE WITH FAN — In this configuration, the relay will be  
ON any time the Fan Enable relay is on.  
CYCLE WITH COMPRESSOR — In this configuration, the  
relay will be ON any time the Compressor relay is on.  
DIGITAL NIGHT SET BACK (NSB) — In this configura-  
tion, the relay will be ON if the NSB input is connected to  
ground C.  
WARNING  
When the disconnect switch is closed, high voltage is  
present in some areas of the electrical panel. Exercise  
caution when working with the energized equipment.  
Failure to heed this warning could lead to personal  
injury.  
NOTE: If there are no relays configured for digital NSB, then  
the NSB and override (OVR) inputs are automatically config-  
ured for mechanical operation.  
MECHANICAL NIGHT SET BACK — When NSB input is  
connected to ground C, all thermostat inputs are ignored. A  
thermostat set back heating call will then be connected to the  
OVR input. If OVR input becomes active, then the Deluxe D  
control will enter Night Low Limit (NLL) staged heating  
mode. The NLL staged heating mode will then provide heating  
during the NSB period.  
1. Restore power to system.  
2. Turn thermostat fan position to ON. Blower should  
start.  
3. Balance airflow at registers.  
4. Adjust all valves to the full open position and turn on  
the line power to all heat pump units.  
5. Operate unit in the cooling cycle first, then the heating  
cycle. Refer to Table 13 for unit operating limits. Al-  
low 15 minutes between cooling and heating tests for  
pressure to equalize.  
NOTE: Two factors determine the operating limits of a unit:  
entering-air temperature and water temperature. Whenever  
any of these factors are at a minimum or maximum level,  
the other two factors must be at a normal level to ensure  
proper unit operation. See Table 13.  
Water Valve (Slow Opening) — If relay is config-  
ured for Water Valve (slow opening), the relay will start  
60 seconds prior to starting compressor relay.  
25  
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Table 13 — Operating Limits — 50PCH,PCV Units  
When the compressor is rotating in the wrong direction, the  
unit makes more noise and does not provide cooling.  
After a few minutes of reverse operation, the scroll com-  
pressor internal overload protection will open, thus activating  
the unit lockout. This requires a manual reset. To reset, turn the  
thermostat on and then off.  
OPERATING LIMITS  
AIR LIMITS  
COOLING (F) HEATING (F)  
Min. Ambient Air – db  
Rated Ambient Air – db  
Max. Ambient Air – db  
Min. Entering Air – db/wb  
Rated Entering Air – db/wb  
Max. Entering Air – db/wb  
WATER LIMITS  
45  
80.6  
110  
50  
80.6/66.2  
110/83  
39  
68  
85  
40  
68  
80  
NOTE: There is a 5-minute time delay before the compressor  
will start.  
Unit Start-Up Cooling Mode  
1. Adjust the unit thermostat to the warmest position.  
Slowly reduce the thermostat position until the compres-  
sor activates.  
2. Check for cool air delivery at unit grille a few minutes  
after the unit has begun to operate.  
Min. Entering Water  
Normal Entering Water  
Max. Entering Water  
Normal Water Flow  
30  
50-110  
120  
20  
30-70  
90  
2.5-3.0 gpm per ton  
LEGEND  
db — Dry Bulb  
wb — Wet Bulb  
3. Verify that the compressor is on and that the water flow  
rate is correct by measuring pressure drop through the  
heat exchanger using P/T plugs. See Table 14. Check the  
elevation and cleanliness of the condensate lines; any  
dripping could be a sign of a blocked line. Be sure the  
condensate trap includes a water seal.  
4. Check the temperature of both supply and discharge wa-  
ter. Compare to Tables 15-25. If temperature is within  
range, proceed. If temperature is outside the range, check  
the cooling refrigerant pressures in Tables 15-25.  
Scroll Compressor Rotation — It is important to  
be certain compressor is rotating in the proper direction. To  
determine whether or not compressor is rotating in the prop-  
er direction:  
1. Connect service gages to suction and discharge pressure  
fittings.  
2. Energize the compressor.  
3. The suction pressure should drop and the discharge  
pressure should rise, as is normal on any start-up.  
If the suction pressure does not drop and the discharge  
pressure does not rise to normal levels:  
1. Turn off power to the unit. Install disconnect tag.  
2. Reverse any two of the unit power leads.  
5. Check air temperature drop across the coil when com-  
pressor is operating. Air temperature drop should be  
between 15 and 25 F.  
Table 14 — Water Temperature Change  
Through Heat Exchanger  
COOLING  
RISE (F)  
HEATING  
DROP (F)  
WATER FLOW RATE (GPM)  
3. Reapply power to the unit and verify pressures are correct.  
Min  
Max  
Min  
Max  
For Closed Loop: Ground Source or  
Cooling/Boiler Systems at 3 gpm/ton  
For Open Loop: Ground Water Systems at  
1.5 gpm/ton  
The suction and discharge pressure levels should now move  
to their normal start-up levels.  
9
12  
4
8
20  
26  
10  
17  
26  
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Table 15 — 50PC006 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Pressure  
(psig)  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction  
Pressure  
(psig)  
Discharge Super-  
Sub-  
Air Temp  
Rise  
(F) DB  
Pressure  
(psig)  
heat cooling  
Pressure  
(psig)  
heat cooling  
(F)  
(F)  
(F)  
(F)  
(F)  
1.5  
2.25  
3
124-134  
120-130  
117-127  
159-179  
147-167  
136-156  
17-22  
20-25  
24-29  
5-10  
5-10  
5-10  
18.7-20.7  
13.6-15.6  
8.5-10.5  
17-23  
18-24  
18-24  
71- 81  
72- 82  
74- 84  
295-315  
296-316  
297-317  
13-18  
14-19  
15-20  
5-10  
5-10  
5-10  
5.9- 7.9  
4.2- 6.2  
2.5- 4.5  
17-23  
17-23  
17-23  
30*  
50  
1.5  
2.25  
3
132-142  
131-141  
130-140  
210-230  
199-219  
189-209  
7-12  
8-13  
9-14  
5-10  
5-10  
4- 9  
16.2-18.2  
11.9-13.9  
7.7- 9.7  
18-24  
19-25  
19-25  
105-115  
110-120  
115-125  
330-350  
335-355  
339-359  
8-13  
9-14  
9-14  
9-14  
9-14  
9-14  
8.2-10.2  
6.1- 8.1  
4.0- 6.0  
22-28  
22-28  
23-29  
1.5  
2.25  
3
136-146  
136-146  
135-145  
275-295  
262-282  
250-270  
5-10  
6-11  
6-11  
5-10  
4- 9  
4- 9  
15.1-17.1  
11.1-13.1  
7.2- 9.2  
17-23  
18-24  
18-24  
136-146  
141-151  
147-157  
362-382  
368-388  
374-394  
9-14  
9-14  
9-14  
10-15 11.3-13.3  
10-15 16.9-18.9  
27-33  
28-34  
29-35  
70  
10-15  
5.6- 7.6  
1.5  
2.25  
3
142-152  
141-151  
140-150  
365-385  
353-373  
340-360  
5-10  
5-10  
5-10  
4- 9  
4- 9  
4- 9  
13.8-15.8  
10.2-12.2  
6.6- 8.6  
16-22  
16-22  
16-22  
170-180  
173-183  
177-187  
402-422  
407-427  
412-432  
14-19  
15-20  
17-22  
12-17 14.4-16.4  
12-17 11.1-13.1  
33-39  
33-39  
34-40  
90  
12-17  
7.7- 9.1  
1.5  
2.25  
3
148-158  
147-157  
146-156  
462-482  
449-469  
438-458  
5-10  
5-10  
5-10  
4- 9  
3- 8  
3- 8  
12.5-14.5  
9.2-11.2  
5.9- 7.9  
14-20  
14-20  
14-20  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
Table 16 — 50PC009 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction Discharge Super-  
Sub-  
Air Temp  
Rise  
(F) DB  
Pressure Pressure  
heat cooling  
Pressure Pressure  
heat cooling  
(F)  
(psig)  
(psig)  
(F)  
(F)  
(psig)  
(psig)  
(F)  
(F)  
1.5  
2.25  
3
113-123  
110-120  
108-118  
160-180  
147-167  
135-155  
22-27  
25-30  
28-33  
13-18  
11-16  
9-14  
19.5-21.5  
14.2-16.2  
8.9-10.9  
17-23  
17-23  
16-21  
69- 79  
72- 82  
75- 85  
331-351  
335-355  
339-359  
11-16  
11-16  
11-16  
20-25  
20-25  
21-26  
7.3- 9.3  
5.4- 7.4  
3.5- 5.5  
17-23  
18-24  
19-25  
30*  
50  
1.5  
2.25  
3
124-134  
122-132  
120-130  
211-231  
199-219  
187-207  
9-14  
12-17  
15-20  
10-15  
9-14  
8-13  
18.0-20.0  
13.2-15.2  
8.4-10.4  
17-23  
17-23  
17-23  
101-111  
105-115  
110-120  
360-380  
363-383  
366-386  
9-14  
9-14  
9-14  
20-25  
19-24  
19-24  
9.8-11.8  
7.4- 9.4  
4.9- 6.9  
23-29  
24-30  
24-30  
1.5  
2.25  
3
129-139  
128-138  
127-137  
275-295  
261-281  
247-267  
7-12  
8-13  
8-13  
8-13 17.4-19.4  
16-22  
16-22  
16-22  
130-140  
137-147  
144-154  
400-420  
407-427  
414-434  
10-15  
10-15  
10-15  
20-25  
19-24  
18-23  
12.8-14.8  
9.6-11.6  
6.4- 8.4  
28-34  
29-35  
30-36  
7-12  
6-11  
12.8-14.8  
8.2-10.2  
70  
1.5  
2.25  
3
136-146  
135-145  
134-144  
364-384  
350-370  
336-356  
7-12  
7-12  
7-12  
3- 8  
4- 9  
4- 9  
15.7-17.7  
11.7-13.7  
7.6- 9.6  
15-21  
15-21  
15-21  
170-180  
178-188  
186-196  
449-469  
455-475  
460-480  
13-18  
14-19  
15-20  
17-22  
15-20  
13-18  
16.0-18.0  
12.0-14.0  
7.9- 9.9  
34-40  
35-41  
36-42  
90  
1.5  
2.25  
3
142-152  
141-151  
140-150  
467-487  
451-471  
435-455  
5-10  
5-10  
5-10  
4- 9  
4- 9  
3- 8  
13.5-15.5  
9.9-11.9  
6.3- 8.3  
13-19  
13-19  
13-19  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
Table 17 — 50PC012 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction Discharge Super- Sub-  
Air Temp  
Rise  
(F) DB  
Pressure Pressure  
heat cooling  
Pressure Pressure  
heat cooling  
(F)  
(psig)  
(psig)  
(F)  
(F)  
(psig)  
(psig)  
(F)  
(F)  
1.5  
2.25  
3
116-126  
113-123  
111-121  
155-175  
144-164  
132-152  
14-19  
15-20  
17-22  
9-14  
8-13  
6-11  
19.4-21.4  
14.3-16.3  
9.1-11.1  
18-24  
18-24  
18-24  
70- 80  
72- 82  
75- 85  
311-331  
315-335  
319-339  
8-13  
8-13  
8-13  
8-13  
8-13  
8-13  
6.9- 8.9  
5.1- 7.1  
3.2- 5.2  
18-24  
19-25  
19-25  
30*  
50  
1.5  
2.25  
3
123-133  
122-132  
121-131  
208-228  
196-216  
184-204  
8-13  
9-14  
9-14  
9-14  
7-12  
5-10  
18.1-20.1  
13.4-15.4  
8.6-10.6  
17-23  
18-24  
18-24  
102-112  
106-116  
110-120  
354-364  
355-375  
355-375  
8-13  
8-13  
8-13  
9-14  
9-14  
9-14  
9.3-11.3  
7.0- 9.0  
4.6- 6.6  
25-31  
26-32  
26-32  
1.5  
2.25  
3
127-137  
126-136  
126-136  
266-286  
255-275  
244-264  
7-12  
8-13  
8-13  
8-13  
7-12  
5-10  
17.2-19.2  
12.7-14.7  
8.2-10.2  
16-22  
16-22  
16-22  
131-141  
137-147  
144-154  
392-412  
395-415  
398-418  
9-14  
9-14  
9-14  
8-13  
8-13  
7-12  
12.0-14.0  
9.0-11.0  
6.0- 8.0  
30-36  
31-37  
32-38  
70  
1.5  
2.25  
3
133-143  
132-142  
132-142  
362-382  
342-362  
331-351  
6-11  
7-12  
7-12  
7-12  
5-10  
4- 9  
16.0-18.0  
11.8-13.8  
7.6- 9.6  
15-21  
15-21  
15-21  
175-185  
183-193  
190-200  
443-463  
452-472  
461-491  
10-15  
11-16  
13-18  
3- 8  
3- 8  
3- 8  
15.0-17.0  
11.2-13.2  
7.4- 9.4  
36-42  
37-43  
38-44  
90  
1.5  
2.25  
3
140-150  
140-150  
139-149  
459-479  
441-461  
431-451  
6-11  
6-11  
6-11  
4- 9  
4- 9  
3- 8  
14.4-16.4  
10.6-12.6  
6.9- 8.9  
13-19  
13-19  
13-19  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 18 — 50PC015 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction Discharge Super- Sub-  
Air Temp  
Rise  
(F) DB  
Pressure Pressure  
heat cooling  
Pressure Pressure  
heat cooling  
(F)  
(psig)  
(psig)  
(F)  
(F)  
(psig)  
(psig)  
(F)  
(F)  
1.5  
2.25  
3
116-126  
116-126  
116-126  
167-187  
154-174  
140-160  
15-20  
15-20  
15-20  
9-14  
7-12  
7-12  
18.3-20.3  
13.9-15.9  
9.5-11.5  
18-24  
19-25  
19-25  
70- 80  
73- 83  
75- 85  
279-299  
281-301  
284-304  
6-11  
7-12  
7-12  
1-5  
1-5  
1-5  
7.0- 8.0  
5.1- 7.1  
3.3- 5.3  
16-22  
17-23  
17-23  
30*  
50  
1.5  
2.25  
3
128-138  
128-138  
128-138  
194-214  
180-200  
166-186  
11-14  
11-14  
11-14  
9-14  
7-12  
7-12  
17.9-19.9  
13.7-15.7  
9.4-11.4  
18-24  
19-25  
19-25  
102-112  
106-116  
110-120  
312-332  
316-336  
321-341  
10-15  
10-15  
10-15  
2-6  
2-6  
2-6  
9.9-11.9  
7.4- 9.4  
4.9- 6.9  
22-28  
23-29  
23-29  
1.5  
2.25  
3
136-146  
136-146  
136-146  
289-309  
275-295  
261-281  
7-12  
7-12  
7-12  
9-14  
7-12  
6-11  
17.4-19.4  
15.3-17.3  
8.8-10.8  
17-23  
18-24  
18-24  
128-138  
134-144  
141-151  
335-355  
340-360  
346-366  
12-17  
12-17  
12-17  
3-8  
3-8  
3-8  
12.9-14.9  
9.7-11.7  
6.5- 8.5  
27-34  
28-35  
28-35  
70  
1.5  
2.25  
3
139-149  
139-149  
139-149  
386-406  
370-390  
356-376  
6-11  
6-11  
6-11  
9-14  
7-12  
6-11  
16.8-18.8  
12.5-14.5  
8.2- 9.2  
16-22  
16-22  
16-22  
160-170  
167-177  
174-184  
373-393  
380-400  
388-408  
15-20  
16-21  
17-22  
3-8  
3-8  
3-8  
15.8-17.8  
12.0-14.0  
8.1-10.1  
30-38  
31-39  
32-40  
90  
1.5  
2.25  
3
145-155  
144-154  
143-153  
483-503  
466-486  
449-469  
6-11  
6-11  
6-11  
9-14  
7-12  
6-11  
15.8-17.8  
11.7-13.7  
7.5- 9.5  
15-21  
15-21  
15-21  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
Table 19 — 50PC018 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction Discharge Super- Sub-  
Air Temp  
Rise  
(F) DB  
Pressure Pressure  
heat cooling  
Pressure Pressure  
heat cooling  
(F)  
(psig)  
(psig)  
(F)  
(F)  
(psig)  
(psig)  
(F)  
(F)  
1.5  
2.25  
3
122-132  
122-132  
122-132  
171-191  
157-177  
145-165  
15-20  
15-20  
15-20  
14-19  
13-18  
13-18  
22.5-24.5  
16.8-19.8  
11.2-13.2  
20-28  
20-28  
20-28  
70- 80  
73- 83  
77- 87  
272-292  
275-295  
278-298  
4- 9  
4- 9  
4- 9  
2- 6  
2- 6  
2- 6  
7.4- 9.4  
5.5- 7.5  
3.5- 5.5  
18-24  
19-25  
19-25  
30*  
50  
1.5  
2.25  
3
136-146  
134-144  
133-143  
198-218  
183-203  
171-191  
10-15  
10-15  
11-16  
14-19  
13-18  
13-18  
22.0-24.0  
16.5-18.5  
11.0-13.0  
19-25  
19-25  
19-25  
101-111  
105-115  
109-119  
302-322  
306-326  
311-331  
8-13  
8-13  
8-13  
3- 7  
3- 7  
3- 7  
10.3-12.3  
7.9- 9.9  
5.5- 7.5  
23-29  
24-30  
25-31  
1.5  
2.25  
3
139-149  
138-148  
137-147  
293-313  
280-300  
267-287  
6-10  
6-10  
7-11  
14-19  
13-18  
13-18  
19.0-21.0  
14.4-16.4  
9.8-11.7  
18-24  
18-24  
18-24  
130-140  
137-147  
139-149  
329-349  
337-357  
342-362  
10-15  
10-15  
10-15  
4- 9  
4- 9  
4- 9  
13.6-15.6  
10.4-12.4  
7.2- 9.2  
27-33  
29-35  
30-36  
70  
1.5  
2.25  
3
142-152  
141-151  
140-150  
389-409  
376-396  
363-383  
5-10  
5-10  
5-10  
17-22  
15-20  
13-18  
16.0-18.0  
12.3-14.3  
8.5-10.5  
17-23  
17-23  
17-23  
160-170  
169-179  
178-188  
360-380  
368-388  
376-396  
13-18  
14-19  
14-19  
5-10  
5-10  
4- 9  
17.0-19.0  
12.9-14.9  
8.8-10.8  
33-41  
35-43  
36-44  
90  
1.5  
2.25  
3
148-158  
147-157  
146-156  
486-506  
472-492  
458-478  
5-10  
5-10  
5-10  
17-22  
15-20  
13-18  
14.9-16.9  
11.4-13.4  
7.8- 9.8  
16-22  
16-22  
16-22  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
Table 20 — 50PC024 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction Discharge Super- Sub-  
Air Temp  
Rise  
(F) DB  
Pressure Pressure  
heat cooling  
Pressure Pressure  
heat cooling  
(F)  
(psig)  
(psig)  
(F)  
(F)  
(psig)  
(psig)  
(F)  
(F)  
1.5  
2.25  
3
121-131  
120-130  
120-130  
174-194  
165-185  
155-175  
13-18  
13-18  
13-18  
6-11  
5-10  
5-10  
19.3-21.3  
14.5-16.5  
9.6-11.6  
20-28  
20-28  
20-28  
65- 75  
68- 78  
71- 81  
287-307  
290-310  
292-312  
4- 9  
5-10  
5-10  
3-8  
3-8  
3-8  
6.8- 8.8  
5.0- 7.0  
3.2- 5.2  
17-23  
18-24  
18-24  
30*  
50  
1.5  
2.25  
3
127-137  
128-138  
128-138  
245-265  
231-251  
217-237  
8-13  
8-13  
8-13  
6-11  
7-12  
7-12  
18.3-20.3  
13.7-15.7  
9.1-11.1  
19-27  
19-27  
19-27  
96-106  
101-111  
105-115  
318-338  
322-342  
327-347  
6-11  
7-12  
8-13  
3-8  
3-8  
3-8  
9.8-11.8  
7.2- 9.2  
4.8- 6.8  
22-28  
23-29  
24-30  
1.5  
2.25  
3
130-140  
130-140  
130-140  
352-372  
334-354  
306-326  
6-11  
6-11  
6-11  
8-13  
9-14  
9-14  
17.5-19.5  
26.2-28.2  
8.7-10.7  
18-26  
18-26  
18-26  
127-137  
132-142  
137-147  
349-369  
353-373  
358-378  
9-14  
9-14  
10-15  
3-8  
3-8  
3-8  
12.7-14.7  
9.5-11.5  
6.3- 8.3  
27-34  
28-35  
29-36  
70  
1.5  
2.25  
3
134-144  
133-143  
133-143  
439-459  
416-436  
394-414  
5-10  
5-10  
5-10  
11-16  
12-17  
12-17  
16.7-18.7  
12.5-14.5  
8.3-10.3  
17-23  
17-23  
17-23  
159-169  
164-174  
170-180  
379-399  
384-404  
390-410  
13-18  
14-19  
16-21  
3-8  
3-8  
3-8  
15.6-17.6  
11.7-13.7  
7.8- 9.8  
32-40  
33-41  
34-42  
90  
1.5  
2.25  
3
140-150  
139-149  
138-148  
536-556  
512-532  
488-508  
4- 9  
4- 9  
4- 9  
22-27  
19-23  
17-22  
17.1-19.1  
12.6-14.6  
8.0-10.0  
17-23  
17-23  
17-23  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
28  
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Table 21 — 50PC030 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction Discharge Super- Sub-  
Air Temp  
Rise  
(F) DB  
Pressure Pressure  
heat cooling  
Pressure Pressure  
heat cooling  
(F)  
(psig)  
(psig)  
(F)  
(F)  
(psig)  
(psig)  
(F)  
(F)  
1.5  
2.25  
3
113-123  
114-124  
114-124  
188-208  
177-197  
166-186  
14-19  
14-19  
14-19  
14-19  
13-18  
13-18  
19.5-21.5  
14.5-16.5  
9.5-11.5  
18-26  
19-27  
19-27  
67- 77  
69- 79  
71- 81  
322-342  
324-344  
326-346  
8-13  
8-13  
8-13  
15-20  
15-20  
15-20  
6.9- 8.9  
5.1- 7.1  
3.3- 5.3  
17-25  
18-26  
18-26  
30*  
50  
1.5  
2.25  
3
124-134  
124-134  
124-134  
248-268  
233-253  
218-238  
11-16  
11-16  
11-16  
14-19  
13-18  
13-18  
18.7-20.7  
13.9-15.9  
9.1-11.1  
18-26  
19-27  
19-27  
95-105  
99-109  
103-113  
346-366  
350-370  
355-375  
10-15  
10-15  
11-16  
15-20  
15-20  
15-20  
9.8-11.8  
7.3- 9.3  
4.8- 6.8  
23-31  
24-32  
25-33  
1.5  
2.25  
3
132-142  
132-142  
132-142  
333-353  
313-333  
293-313  
9-14  
9-14  
9-14  
13-18  
12-17  
12-17  
17.5-19.5  
13.0-15.0  
8.5-10.5  
18-26  
18-26  
18-26  
125-135  
133-143  
136-146  
376-396  
386-406  
393-413  
13-18  
13-18  
13-18  
14-19  
14-19  
14-19  
12.7-14.7  
9.8-11.8  
6.4- 8.4  
27-35  
28-36  
30-38  
70  
1.5  
2.25  
3
135-145  
135-145  
135-145  
431-451  
411-431  
391-411  
7-12  
7-12  
7-12  
17-22  
15-20  
13-18  
16.5-18.5  
12.3-14.3  
8.0-10.0  
17-25  
17-25  
17-25  
155-165  
167-177  
170-180  
415-435  
422-442  
430-450  
15-20  
16-21  
17-22  
13-18  
13-18  
13-18  
15.6-18.6  
11.8-13.8  
7.9- 9.9  
33-41  
34-42  
36-44  
90  
1.5  
2.25  
3
140-150  
140-150  
139-149  
528-548  
506-526  
485-505  
6-11  
7-12  
7-12  
17-22  
15-20  
13-18  
16.2-18.2  
11.9-13.9  
7.6- 9.6  
16-24  
16-24  
16-24  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
Table 22 — 50PC036 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction Discharge Super- Sub-  
Air Temp  
Rise  
(F) DB  
Pressure Pressure  
heat cooling  
Pressure Pressure  
heat cooling  
(F)  
(psig)  
(psig)  
(F)  
(F)  
(psig)  
(psig)  
(F)  
(F)  
1.5  
2.25  
3
113-123  
113-123  
113-123  
185-205  
174-194  
163-183  
17-22  
17-22  
17-22  
9-14  
8-13  
8-13  
19.5-21.5  
14.5-16.5  
9.6-11.6  
18-26  
19-27  
19-27  
64- 74  
66- 76  
69- 79  
327-347  
331-351  
335-365  
4- 9  
4- 9  
4- 9  
15-20  
15-20  
15-20  
7.7- 9.7  
5.7- 7.7  
3.7- 5.7  
19-27  
19-27  
20-28  
30*  
50  
1.5  
2.25  
3
121-131  
120-130  
120-130  
249-269  
231-251  
214-234  
12-17  
12-17  
12-17  
9-14  
8-13  
8-13  
19.4-21.4  
14.4-16.4  
9.4-11.4  
17-25  
18-26  
18-26  
91-101  
96-106  
102-112  
360-380  
370-390  
380-400  
10-15  
9-14  
8-13  
15-20  
16-21  
16-21  
11.2-13.2  
8.2-10.2  
5.2- 7.2  
25-33  
26-34  
27-35  
1.5  
2.25  
3
128-138  
128-138  
127-137  
327-347  
304-324  
282-302  
9-14  
9-14  
9-14  
13-18  
11-16  
10-15  
19.1-21.1  
14.1-16.1  
9.1-11.1  
16-24  
17-25  
17-25  
125-135  
132-142  
140-150  
402-422  
413-433  
423-443  
10-15  
10-15  
10-15  
14-19  
14-19  
14-19  
14.7-16.7  
11.0-13.0  
7.3- 9.3  
32-40  
33-41  
34-42  
70  
1.5  
2.25  
3
132-142  
132-142  
131-141  
416-436  
396-416  
376-396  
8-13  
8-13  
8-13  
20-25  
18-23  
16-21  
18.8-20.8  
13.9-15.9  
8.9-10.9  
15-23  
16-24  
16-24  
158-168  
167-177  
177-187  
445-465  
456-476  
467-487  
13-18  
13-18  
14-19  
12-17  
11-16  
11-16  
18.1-20.1  
13.8-15.8  
9.4-11.4  
37-45  
38-46  
40-48  
90  
1.5  
2.25  
3
138-148  
136-146  
135-145  
550-570  
525-545  
500-520  
8-13  
8-13  
8-13  
20-25  
18-23  
16-21  
18.5-20.5  
13.6-15.6  
8.7-10.7  
15-23  
15-23  
15-23  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
Table 23 — 50PC042 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction Discharge Super- Sub-  
Air Temp  
Drop  
(F) DB  
Suction Discharge Super- Sub-  
Air Temp  
Rise  
(F) DB  
Pressure Pressure  
heat cooling  
Pressure Pressure  
heat cooling  
(F)  
(psig)  
(psig)  
(F)  
(F)  
(psig)  
(psig)  
(F)  
(F)  
1.5  
2.25  
3
115-125  
115-125  
115-125  
174-194  
159-179  
144-164  
12-17  
12-17  
12-17  
10-15  
9-14  
9-14  
19.8-21.8  
14.6-16.6  
9.5-11.5  
16-24  
16-24  
16-24  
66- 76  
69- 79  
72- 82  
314-334  
318-338  
321-341  
6-11  
5-10  
4- 9  
11-16  
12-17  
12-17  
7.3- 9.3  
5.4- 7.4  
3.4- 5.4  
18-26  
19-27  
19-27  
30*  
50  
1.5  
2.25  
3
123-133  
122-132  
122-132  
233-253  
219-239  
205-225  
9-14  
9-14  
9-14  
10-15  
9-14  
9-14  
19.0-21.0  
14.0-16.0  
9.1-11.1  
16-24  
16-24  
16-24  
97-107  
101-111  
106-116  
354-374  
360-380  
365-385  
9-14  
8-13  
6-11  
13-18  
13-18  
13-18  
10.2-12.2  
7.6- 9.6  
5.0- 7.0  
24-32  
25-33  
26-34  
1.5  
2.25  
3
128-138  
128-138  
128-138  
309-329  
290-310  
271-291  
6-11  
6-11  
6-11  
12-17  
11-14  
11-14  
18.3-20.3  
13.5-15.5  
8.7-10.7  
16-24  
16-24  
16-24  
130-140  
136-146  
143-153  
394-414  
401-421  
409-429  
7-12  
7-12  
8-13  
13-18  
13-18  
13-18  
13.3-15.3  
9.9-11.9  
6.6- 8.6  
30-38  
31-39  
32-40  
70  
1.5  
2.25  
3
133-143  
133-143  
132-142  
406-426  
386-406  
367-387  
5-10  
5-10  
5-10  
14-19  
13-18  
13-18  
17.6-19.6  
12.9-14.9  
8.3-10.3  
16-24  
16-24  
16-24  
164-174  
172-182  
180-190  
434-454  
443-463  
453-473  
10-15  
11-16  
11-16  
12-17  
12-17  
12-17  
16.4-18.4  
12.3-14.3  
8.3-10.3  
37-45  
38-46  
39-47  
90  
1.5  
2.25  
3
138-148  
138-148  
138-148  
505-525  
484-504  
463-483  
5-10  
5-10  
5-10  
19-24  
16-21  
14-19  
16.8-18.8  
12.4-14.4  
7.9- 9.9  
16-24  
16-24  
16-24  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
29  
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Table 24 — 50PC048 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Pressure  
(psig)  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction  
Pressure  
(psig)  
Discharge Super-  
Sub-  
Air Temp  
Rise  
(F) DB  
Pressure  
(psig)  
heat cooling  
Pressure  
(psig)  
heat cooling  
(F)  
(F)  
(F)  
(F)  
(F)  
1.5  
2.25  
3
119-129  
119-129  
119-129  
190-210  
179-199  
158-178  
15-20  
15-20  
15-20  
10-15 19.3-21.3  
9-14 14.6-16.6  
18-26  
19-27  
19-27  
63- 73  
66- 76  
69- 79  
284-304  
288-308  
292-312  
5-10  
6-10  
6-11  
3-8  
3-8  
3-8  
6.9- 8.9  
5.0- 7.0  
3.1- 5.1  
17-25  
18-26  
18-26  
30*  
50  
9-14  
9.8-11.8  
1.5  
2.25  
3
124-134  
123-133  
123-133  
248-268  
230-250  
213-233  
10-15  
10-15  
10-15  
10-15 19.0-21.0  
9-14 14.3-16.3  
18-26  
19-27  
19-27  
92-102  
96-106  
100-110  
309-329  
313-333  
317-337  
8-13  
9-14  
9-14  
3-8  
3-8  
3-8  
9.5-11.5  
7.0- 9.0  
4.6- 6.6  
23-31  
24-32  
24-32  
9-14  
9.6-11.6  
1.5  
2.25  
3
129-139  
129-139  
129-139  
337-357  
328-348  
300-320  
8-13  
8-13  
8-13  
12-17 18.6-20.6  
11-16 14.0-16.0  
17-25  
18-26  
18-26  
123-133  
128-138  
133-143  
339-359  
344-364  
350-370  
11-16  
11-16  
12-17  
3-8  
3-8  
3-8  
12.5-14.5  
9.3-11.3  
6.2- 8.2  
29-37  
29-37  
30-38  
70  
11-16  
9.4-11.4  
1.5  
2.25  
3
134-144  
134-144  
134-144  
426-446  
406-426  
386-406  
6-11  
6-11  
6-11  
15-20 18.2-20.2  
15-20 13.7-15.7  
16-24  
17-25  
17-25  
153-163  
160-170  
167-177  
369-389  
376-396  
384-404  
14-19  
15-20  
16-21  
1-6  
1-6  
1-6  
15.4-17.4  
11.6-13.6  
7.8- 9.8  
33-41  
35-43  
36-44  
90  
15-20  
9.2-11.2  
1.5  
2.25  
3
140-150  
140-150  
139-149  
560-580  
536-556  
511-531  
4- 9  
4- 9  
4- 9  
23-28 17.7-19.7  
20-25 13.4-15.4  
16-24  
16-24  
16-24  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
18-22  
9.0-11.0  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
Table 25 — 50PC060 Typical Unit Operating Pressures and Temperatures  
COOLING  
HEATING  
ENTERING  
WATER  
TEMP  
WATER  
FLOW  
(GPM/ton)  
Water  
Temp  
Rise  
(F)  
Water  
Temp  
Drop  
(F)  
Suction  
Pressure  
(psig)  
Discharge Super-  
Sub-  
Air Temp  
Drop  
(F) DB  
Suction  
Pressure  
(psig)  
Discharge Super-  
Sub-  
Air Temp  
Rise  
(F) DB  
Pressure  
(psig)  
heat cooling  
Pressure  
(psig)  
heat cooling  
(F)  
(F)  
(F)  
(F)  
(F)  
1.5  
2.25  
3
108-118  
108-118  
108-118  
180-200  
165-185  
150-170  
16-21  
16-21  
16-21  
10-15  
20.6  
19-27  
20-28  
20-28  
61- 71  
64- 74  
66- 76  
314-334  
317-337  
319-339  
6-11  
7-12  
7-12  
14-19  
13-18  
13-18  
7.6- 9.6  
5.6- 7.6  
3.6- 5.6  
19-27  
20-28  
20-28  
9-14 15.2-17.2  
30*  
50  
9-14  
9.7-11.7  
1.5  
2.25  
3
113-123  
113-123  
113-123  
206-226  
190-210  
173-193  
11-14  
11-14  
11-14  
10-15 19.8-21.8  
9-14 14.5-16.5  
9-14  
18-26  
19-27  
19-27  
90-100  
95-105  
99-109  
350-370  
357-377  
364-384  
11-16  
11-16  
10-15  
14-19 10.5-12.5  
14-19  
14-19  
25-33  
27-35  
28-36  
7.9- 9.9  
5.2- 7.2  
9.3-11.3  
1.5  
2.25  
3
119-129  
118-128  
118-128  
305-325  
287-307  
269-289  
9-14  
9-14  
9-14  
12-17 18.8-20.8  
11-14 13.8-15.8  
17-25  
18-26  
18-26  
123-133  
129-139  
135-145  
391-411  
399-419  
407-427  
12-17  
12-17  
13-18  
14-19 13.7-15.7  
14-19 10.3-12.3  
33-41  
34-42  
35-43  
70  
11-14  
8.8-10.8  
14-19  
6.9- 8.9  
1.5  
2.25  
3
124-134  
124-134  
123-133  
402-422  
382-402  
363-383  
7-12  
7-12  
7-12  
14-19 17.8-19.8  
13-18 13.1-15.1  
16-24  
17-25  
17-25  
157-167  
164-184  
172-182  
431-451  
440-460  
450-470  
13-18  
14-19  
16-21  
13-18 16.8-18.8  
13-18 12.7-14.7  
38-46  
39-47  
41-49  
90  
13-18  
8.3-10.3  
12-17  
8.6-10.6  
1.5  
2.25  
3
130-140  
129-139  
128-138  
500-520  
479-499  
458-478  
7-12  
6-11  
5-10  
20-25 17.0-19.0  
16-21 12.4-14.4  
16-24  
16-24  
16-24  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110  
13-18  
7.8- 9.8  
LEGEND  
DB  
—
—
—
Dry Bulb  
No Heating Operation in This Temperature Range  
*Based on 15% Methanol antifreeze solution.  
Unit Start-Up Heating Mode  
NOTE: Operate the unit in heating cycle after checking the  
cooling cycle. Allow 5 minutes between tests for the pressure  
or reversing valve to equalize.  
1. Turn thermostat to lowest setting and set thermostat  
switch to HEAT position.  
2. Slowly turn the thermostat to a higher temperature until  
the compressor activates.  
3. Check for warm air delivery at the unit grille within a few  
minutes after the unit has begun to operate.  
4. Check the temperature of both supply and discharge wa-  
ter. Compare to Tables 15-25. If temperature is within  
range, proceed. If temperature is outside the range, check  
the heating refrigerant pressures in Tables 15-25.  
5. Once the unit has begun to run, check for warm air deliv-  
ery at the unit grille.  
6. Check air temperature rise across the coil when compres-  
sor is operating. Air temperature rise should be between  
20 and 30 F after 15 minutes at load.  
Unit Start-Up with WSHP Open Controls —  
The WSHP Open is a multi-protocol (default BACnet*) con-  
troller with extensive features, flexible options and powerful  
capabilities. The unit comes from the factory pre-programmed  
and needs minimal set up to function in a BAS (Building  
Automation System) system or provide additional capabilities  
to Carrier's WSHP product line. Most settings on the controller  
have factory defaults set for ease of installation. There are a  
few settings that must be configured in the field and several  
settings that can be adjusted if required by unique job condi-  
tions. Refer to Appendix A — WSHP Open Screen Configura-  
tion. In order to configure the unit, a BACview6 display is  
required. See Fig. 29.  
NOTE: If the WSHP Open control has lost its programming,  
all display pixels will be displayed on the SPT sensor. See the  
WSHP Third Party Integration Guide.  
When the unit is OFF, the SPT sensor will indicate OFF.  
When power is applied, the SPT sensor will indicate tempera-  
ture in the space at 78 F.  
7. Check for vibration, noise and water leaks.  
*Sponsored by ASHRAE (American Society of Heating, Refrigerat-  
ing and Air Conditioning Engineers).  
30  
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To start-up a unit with WSHP Open controls:  
• # of Fan Speeds — This should be set to "1" for  
units with PSC motors and set to "3" for units with  
ECM motors.  
• Compressor Stages — This should be set to "1."  
• Factory Dehumidification Reheat Coil — This  
should be set to "none" unless the modulating hot  
water reheat option is supplied in the unit, then set  
to "installed."  
1. To plug in the BACview6 handheld display into a SPT  
sensor, point the two ears on the connector up and tilt the  
bottom of the plug toward you. Insert the plug up into the  
SPT sensor while pushing the bottom of the plug away  
from you.  
2. BACview6 should respond with "Establishing Connec-  
tion." The Home screen will then appear on the display  
showing operating mode and space temperature. Press  
any button to continue.  
• The condenser water limit needs to be verified  
depending on design parameters and application,  
whether geothermal or boiler/tower.  
See Appendix A — WSHP Open Screen Configuration  
for the hierarchal structure of the WSHP Open controller.  
All functions of the controller can be set from the Home  
screen.  
7. To view unit configuration settings:  
a. Select Unit Configuration softkey, then select Unit.  
b. Scroll through the unit settings by using the up and  
down arrow keys. Unit settings include:  
• Fan Mode: Default Continuous  
3. When the Login is requested, type 1111 and push the OK  
softkey. The Logout will then be displayed to indicate the  
password was accepted.  
• Fan Delay:  
• Minimum SAT Cooling: Default 50 F  
• Maximum SAT Heating: Default 110 F  
• Filter Service Alarm: Must be set from 0 to 9999 hr  
4. To set the Clock if it is not already displayed:  
a. Select System Settings from the Home screen, then  
press Clockset.  
b. Scroll to hour, minute and second using the arrow  
keys. Use the number keypad to set actual time.  
c. Scroll to day, month and year using arrow keys.  
Use number keypad to set date.  
8. To set local schedules:  
a. Select the Schedule softkey from the Configuration  
screen, then press enter.  
b. Select Weekly, then press enter (7 schedules  
available).  
c. Select day and press enter.  
d. Press enter again and select ADD or DEL (DECR  
or INCR) set schedule.  
5. To set Daylight Savings Time (DST):  
a. Push the DST softkey. The display will indicate  
02:00:060 which is equal to 2:00AM.  
b. To program the beginning and end dates, scroll  
down to the beginning month and press the enter  
key. The softkeys (INCR and DECR) will activate  
to increment the month in either direction, Jan,  
Feb, March, etc.  
c. Use number keys to select the day of month and  
year.  
e. Enter ON/OFF time, then press continue.  
f. Press OK to apply and save to a particular day of  
the week.  
g. Continue to add the same or different schedule spe-  
cific days of the week.  
To add exceptions to the schedule:  
i. Press Add softkey.  
d. Push the OK softkey to finalize the data.  
6. To view configuration settings:  
ii. Select exception type from following:  
• Date  
a. Select the Config softkey.  
• Date Range  
b. Select the Service Config softkey. Scroll through  
the factory settings by using the up and down  
arrow keys. See below for factory settings.  
• Week-N-Day  
• Calender Reference  
9. Go back to Home Screen.  
Only the following settings will need to be  
checked.  
10. Remove BACview6 cable from SPT sensor by reversing  
the process in Step 1.  
11. Perform system test.  
a50-8444  
Fig. 29 — BACview6 Display Interface  
31  
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the unit by checking pressure drop across the heat exchanger.  
Compare the results to the data in Table 26.  
Flow Regulation — Flow regulation can be accom-  
plished by two methods. Most water control valves have a flow  
adjustment built into the valve. By measuring the pressure drop  
through the unit heat exchanger, the flow rate can be deter-  
mined. See Table 26. Adjust the water control valve until the  
flow of 1.5 to 2 gpm is achieved. Since the pressure constantly  
varies, two pressure gages may be needed in some  
applications.  
An alternative method is to install a flow control device.  
These devices are typically an orifice of plastic material de-  
signed to allow a specified flow rate that are mounted on the  
outlet of the water control valve. Occasionally these valves  
produce a velocity noise that can be reduced by applying some  
back pressure. To accomplish this, slightly close the leaving  
isolation valve of the well water setup.  
Table 26 — Coaxial Water Pressure Drop  
PRESSURE DROP, psi (kPa)  
50PC UNIT  
gpm  
L/s  
30 F  
50 F  
70 F  
90 F  
(32 C)  
SIZE  
(-1 C)  
(10 C)  
(21 C))  
0.75  
1.1  
1.5  
1.1  
1.8  
2.3  
1.5  
2.3  
3.0  
1.9  
2.8  
3.8  
2.3  
3.4  
4.5  
3.0  
4.5  
6.0  
3.8  
5.6  
7.5  
4.5  
6.8  
9.0  
5.3  
7.9  
10.5  
6.0  
9.0  
12.0  
7.5  
11.3  
15.0  
0.05  
0.07  
0.09  
0.07  
0.11  
0.14  
0.09  
0.15  
0.19  
0.12  
0.18  
0.24  
0.14  
0.21  
0.28  
0.19  
0.28  
0.38  
0.24  
0.35  
0.47  
0.28  
0.43  
0.57  
0.33  
0.50  
0.66  
0.38  
0.57  
0.76  
0.47  
0.71  
0.95  
0.5 (3.7) 0.3 (2.3) 0.2 (1.6) 0.2 (1.6)  
0.8 (5.3) 0.5 (3.5) 0.4 (2.7) 0.3 (2.2)  
1.3 (8.8) 0.9 (6.1) 0.7 (4.8) 0.6 (4.0)  
1.3 (9.0) 0.6 (4.4) 0.4 (2.8) 0.3 (1.9)  
2.1 (14.1) 1.4 (9.4) 1.1 (7.4) 0.9 (6.2)  
3.5 (24.3) 2.6 (17.9) 2.1 (14.7) 1.8 (12.7)  
1.9 (12.8) 1.1 (7.6) 0.8 (5.3) 0.6 (4.1)  
3.6 (25.0) 2.6 (17.8) 2.1 (14.3) 1.8 (12.1)  
6.7 (46.1) 5.0 (34.3) 4.1 (28.3) 3.6 (24.5)  
1.0 (6.9) 0.6 (4.4) 0.5 (3.4) 0.4 (2.8)  
1.8 (12.4) 1.4 (9.3) 1.1 (7.6) 1.0 (6.9)  
3.3 (22.7) 2.5 (17.5) 2.1 (14.7) 1.9 (13.1)  
2.1 (14.5) 1.4 (9.9) 1.1 (7.6) 0.9 (6.2)  
3.4 (23.4) 2.6 (17.6) 2.1 (14.7) 1.8 (12.4)  
5.9 (40.6) 4.6 (31.5) 3.9 (26.9) 3.4 (23.4)  
2.2 (15.2) 1.7 (11.6) 1.4 (9.6) 1.2 (8.3)  
4.0 (27.6) 3.2 (22.2) 2.8 (19.3) 2.5 (17.2)  
7.2 (49.6) 5.9 (40.6) 5.2 (35.8) 4.7 (32.4)  
1.3 (9.0) 0.9 (6.1) 0.7 (4.8) 0.6 (4.1)  
2.3 (15.8) 1.8 (12.5) 1.5 (10.3) 1.4 (9.6)  
4.2 (28.9) 3.4 (23.2) 2.9 (20.0) 2.6 (17.9)  
1.8 (12.4) 1.4 (9.6) 1.2 (8.3) 1.0 (6.9)  
3.1 (21.4) 2.4 (16.8) 2.1 (14.7) 1.9 (13.1)  
5.4 (37.2) 4.4 (30.0) 3.8 (26.2) 3.4 (23.4)  
2.3 (15.8) 1.8 (12.1) 1.5 (10.3) 1.3 (9.0)  
4.3 (29.6) 3.5 (24.2) 3.1 (26.4) 2.8 (19.3)  
7.9 (54.4) 6.5 (44.8) 5.7 (39.3) 5.2 (35.8)  
1.8 (12.4) 1.5 (10.1) 1.3 (9.0) 1.2 (8.3)  
3.4 (23.4) 3.0 (20.4) 2.7 (18.6) 2.6 (17.9)  
6.2 (42.7) 5.5 (37.9) 5.1 (35.1) 4.8 (35.1)  
3.4 (23.4) 2.8 (19.2) 2.4 (16.5) 2.2 (15.2)  
6.8 (46.9) 5.9 (40.8) 5.4 (37.2) 5.0 (34.5)  
12.6 (86.8) 11.1(76.8) 10.3(71.0) 9.6 (66.1)  
006  
009  
012  
015  
018  
024  
030  
036  
042  
048  
060  
WARNING  
To avoid possible injury or death due to electrical shock,  
open the power supply disconnect switch and secure it in  
an open position before flushing system.  
Flushing — Once the piping is complete, units require final  
purging and loop charging. A flush cart pump of at least 1.5 hp  
is needed to achieve adequate flow velocity in the loop to purge  
air and dirt particles from the loop. Flush the loop in both  
directions with a high volume of water at a high velocity. Fol-  
low the steps below to properly flush the loop:  
1. Verify power is off.  
2. Fill loop with water from hose through flush cart before  
using flush cart pump to ensure an even fill. Do not allow  
the water level in the flush cart tank to drop below the  
pump inlet line to prevent air from filling the line.  
3. Maintain a fluid level in the tank above the return tee to  
avoid air entering back into the fluid.  
4. Shutting off the return valve that connects into the flush  
cart reservoir will allow 50 psig surges to help purge air  
pockets. This maintains the pump at 50 psig.  
5. To purge, keep the pump at 50 psig until maximum  
pumping pressure is reached.  
6. Open the return valve to send a pressure surge through  
the loop to purge any air pockets in the piping system.  
7. A noticeable drop in fluid level will be seen in the flush  
cart tank. This is the only indication of air in the loop.  
NOTE: If air is purged from the system while using a 10 in.  
PVC flush tank, the level drop will only be 1 to 2 in. since  
liquids are incompressible. If the level drops more than this,  
flushing should continue since air is still being compressed in  
the loop. If level is less than 1 to 2 in., reverse the flow.  
Antifreeze — In areas where entering loop temperatures  
drop below 40 F or where piping will be routed through areas  
subject to freezing, antifreeze is needed.  
Alcohols and glycols are commonly used as antifreeze  
agents. Freeze protection should be maintained to 15 F below  
the lowest expected entering loop temperature. For example, if  
the lowest expected entering loop temperature is 30 F, the  
leaving loop temperature would be 22 to 25 F. Therefore, the  
freeze protection should be at 15 F (30 F – 15 F = 15 F).  
IMPORTANT: All alcohols should be pre-mixed and  
pumped from a reservoir outside of the building or  
introduced under water level to prevent fuming.  
8. Repeat this procedure until all air is purged.  
9. Restore power.  
Antifreeze may be added before, during or after the flushing  
process. However, depending on when it is added in the  
process, it can be wasted. Refer to the Antifreeze section for  
more detail.  
Loop static pressure will fluctuate with the seasons. Pres-  
sures will be higher in the winter months than during the  
warmer months. This fluctuation is normal and should be con-  
sidered when charging the system initially. Run the unit in  
either heating or cooling for several minutes to condition the  
loop to a homogenous temperature.  
When complete, perform a final flush and pressurize the  
loop to a static pressure of 40 to 50 psig for winter months or  
15 to 20 psig for summer months.  
After pressurization, be sure to remove the plug from the  
end of the loop pump motor(s) to allow trapped air to be  
discharged and to ensure the motor housing has been flooded.  
Be sure the loop flow center provides adequate flow through  
Calculate the total volume of fluid in the piping system. See  
Table 27. Use the percentage by volume in Table 28 to  
determine the amount of antifreeze to use. Antifreeze concen-  
tration should be checked from a well mixed sample using a  
hydrometer to measure specific gravity.  
FREEZE PROTECTION SELECTION — The 30 F FP1  
factory setting (water) should be used to avoid freeze damage  
to the unit.  
Once antifreeze is selected, the JW3 jumper (FP1) should  
be clipped on the control to select the low temperature (anti-  
freeze 13 F) set point to avoid nuisance faults.  
Cooling Tower/Boiler Systems — These systems typ-  
ically use a common loop temperature maintained at 60 to 90 F.  
Carrier recommends using a closed circuit evaporative cooling  
tower with a secondary heat exchanger between the tower and  
32  
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the water loop. If an open type cooling tower is used continu-  
ously, chemical treatment and filtering will be necessary.  
Units with Aquazone™ Deluxe D Control  
STANDBY/FAN ONLY — The compressor will be off. The  
Fan Enable, Fan Speed, and reversing valve (RV) relays will be  
on if inputs are present. If there is a Fan 1 demand, the Fan  
Enable will immediately turn on. If there is a Fan 2 demand,  
the Fan Enable and Fan Speed will immediately turn on.  
NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1  
and Fan 2 outputs.  
HEATING STAGE 1 — In Heating Stage 1 mode, the Fan  
Enable and Compressor relays are turned on immediately.  
Once the demand is removed, the relays are turned off and the  
control reverts to Standby mode. If there is a master/slave or  
dual compressor application, all compressor relays and related  
functions will operate per their associated DIP switch 2 setting  
on S1.  
HEATING STAGE 2 — In Heating Stage 2 mode, the Fan  
Enable and Compressor relays are remain on. The Fan Speed  
relay is turned on immediately and turned off immediately  
once the demand is removed. The control reverts to Heating  
Stage 1 mode. If there is a master/slave or dual compressor  
application, all compressor relays and related functions will op-  
erate per their associated DIP switch 2 setting on S1.  
Table 27 — Approximate Fluid Volume (gal.)  
per 100 Ft of Pipe  
PIPE  
DIAMETER (in.)  
VOLUME (gal.)  
Copper  
1
1.25  
1.5  
4.1  
6.4  
9.2  
Rubber Hose  
Polyethylene  
1
3.9  
3/4 IPS SDR11  
1 IPS SDR11  
11/4 IPS SDR11  
1/2 IPS SDR11  
2 IPS SDR11  
11/4 IPS SCH40  
11/2 IPS SCH40  
2 IPS SCH40  
2.8  
4.5  
8.0  
10.9  
18.0  
8.3  
10.9  
17.0  
LEGEND  
IPS  
SCH  
SDR  
—
—
—
Internal Pipe Size  
Schedule  
Standard Dimensional Ratio  
NOTE: Volume of heat exchanger is approximately 1.0 gallon.  
Table 28 — Antifreeze Percentages by Volume  
MINIMUM TEMPERATURE FOR FREEZE  
HEATING STAGE 3 — In Heating Stage 3 mode, the Fan  
Enable, Fan Speed and Compressor relays remain on. The EH1  
output is turned on immediately. With continuing Heat Stage 3  
demand, EH2 will turn on after 10 minutes. EH1 and EH2 are  
turned off immediately when the Heating Stage 3 demand is re-  
moved. The control reverts to Heating Stage 2 mode.  
PROTECTION (F)  
ANTIFREEZE  
Methanol (%)  
10  
15  
20  
25  
25  
21  
16  
10  
100% USP Food Grade  
Propylene Glycol (%)  
Ethanol (%)  
38  
29  
30  
25  
22  
20  
15  
14  
Output EH2 will be off if FP1 is greater than 45 F AND FP2  
(when shorted) is greater than 110 F during Heating Stage 3  
mode. This condition will have a 30-second recognition time.  
Also, during Heating Stage 3 mode, EH1, EH2, Fan Enable,  
and Fan Speed will be ON if G input is not active.  
OPERATION  
Power Up Mode — The unit will not operate until all the  
inputs, terminals and safety controls are checked for normal  
operation.  
EMERGENCY HEAT — In Emergency Heat mode, the Fan  
Enable and Fan Speed relays are turned on. The EH1 output is  
turned on immediately. With continuing Emergency Heat de-  
mand, EH2 will turn on after 5 minutes. Fan Enable and Fan  
Speed relays are turned off after a 60-second delay. The control  
reverts to Standby mode.  
NOTE: The compressor will have a 5-minute anti-short cycle  
upon power up.  
Units with Aquazone™ Complete C Control  
STANDBY — Y and W terminals are not active in standby  
mode, however the O and G terminals may be active, depend-  
ing on the application. The compressor will be off.  
COOLING — Y and O terminals are active in Cooling mode.  
After power up, the first call to the compressor will initiate a  
5 to 80 second random start delay and a 5-minute anti-short  
cycle protection time delay. After both delays are complete, the  
compressor is energized.  
NOTE: On all subsequent compressor calls the random start  
delay is omitted.  
HEATING STAGE 1 — Terminal Y is active in heating  
stage 1. After power up, the first call to the compressor will  
initiate a 5 to 80 second random start delay and a 5-minute  
anti-short cycle protection time delay. After both delays are  
complete, the compressor is energized.  
NOTE: On all subsequent compressor calls the random start  
delay is omitted.  
HEATING STAGE 2 — To enter Stage 2 mode, terminal W is  
active (Y is already active). Also, the G terminal must be ac-  
tive or the W terminal is disregarded. The compressor relay  
will remain on and EH1 is immediately turned on. EH2 will  
turn on after 10 minutes of continual stage 2 demand.  
NOTE: EH2 will not turn on (or if on, will turn off) if FP1 tem-  
perature is greater than 45 F and FP2 is greater than 110 F.  
Output EH1, EH2, Fan Enable, and Fan Speed will be ON if  
the G input is not active during Emergency Heat mode.  
COOLING STAGE 1 — In Cooling Stage 1 mode, the Fan  
Enable, compressor and RV relays are turned on immediately.  
If configured as stage 2 (DIP switch set to OFF) then the com-  
pressor and fan will not turn on until there is a stage 2 demand.  
The fan Enable and compressor relays are turned off immedi-  
ately when the Cooling Stage 1 demand is removed. The  
control reverts to Standby mode. The RV relay remains on until  
there is a heating demand. If there is a master/slave or dual  
compressor application, all compressor relays and related func-  
tions will track with their associated DIP switch 2 on S1.  
COOLING STAGE 2 — In Cooling Stage 2 mode, the Fan  
Enable, compressor and RV relays remain on. The Fan Speed  
relay is turned on immediately and turned off immediately  
once the Cooling Stage 2 demand is removed. The control re-  
verts to Cooling Stage 1 mode. If there is a master/slave or dual  
compressor application, all compressor relays and related func-  
tions will track with their associated DIP switch 2 on S1.  
NIGHT LOW LIMIT (NLL) STAGED HEATING — In  
NLL staged Heating mode, the override (OVR) input becomes  
active and is recognized as a call for heating and the control  
will immediately go into a Heating Stage 1 mode. With an  
additional 30 minutes of NLL demand, the control will go into  
Heating Stage 2 mode. With another additional 30 minutes of  
NLL demand, the control will go into Heating Stage 3 mode.  
EMERGENCY HEAT — In emergency heat mode, terminal  
W is active while terminal Y is not. Terminal G must be active  
or the W terminal is disregarded. EH1 is immediately turned  
on. EH2 will turn on after 5 minutes of continual emergency  
heat demand.  
Units with WSHP Open Multiple Protocol —  
The WSHP Open multi-protocol controller will control me-  
chanical cooling, heating and waterside economizer outputs  
based on its own space temperature input and set points. An  
33  
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optional CO2 IAQ (indoor air quality) sensor mounted in the  
space can maximize the occupant comfort. The WSHP Open  
controller has its own hardware clock that is automatically set  
when the heat pump software is downloaded to the board. Oc-  
cupancy types are described in the scheduling section below.  
The following sections describe the functionality of the WSHP  
Open multi-protocol controller. All point objects referred to in  
this sequence of operation will be referenced to the objects as  
viewed in the BACview6 handheld user interface.  
SCHEDULING — Scheduling is used to start/stop the unit  
based on a time period to control the space temperature to spec-  
ified occupied heating and cooling set points. The controller is  
defaulted to control by occupied set points all the time, until ei-  
ther a time schedule is configured with BACview6, Field Assis-  
tant, i-Vu® Open, or a third party control system to enable/dis-  
able the BAS (Building Automation System) on/off point. The  
local time and date must be set for these functions to operate  
properly. The occupancy source can be changed to one of the  
following:  
fan. There are also configured fan delays for Fan On and Fan  
Off. The Fan On delay defines the delay time (0 to 30 seconds;  
default 10) before the fan begins to operate after heating or  
cooling is started while the Fan Off delay defines the delay  
time (0 to 180 seconds; default 45) the fan will continue to op-  
erate after heating or cooling is stopped. The fan will continue  
to run as long as the compressors, heating stages, or the dehu-  
midification relays are on. If the SPT failure alarm or conden-  
sate overflow alarm is active; the fan will be shut down imme-  
diately regardless of occupancy state or demand.  
Fan Speed Control (During Heating) — Whenever heat is re-  
quired and active, the control continuously monitors the sup-  
ply-air temperature to verify it does not rise above the config-  
ured maximum heating SAT limit (110 F default). As the SAT  
approaches this value, the control will increase the fan speed as  
required to ensure the SAT will remain within the limit. This  
feature provides the most quiet and efficient operation by oper-  
ating the fan at the lowest speed possible.  
Fan Speed Control (During Cooling) — Whenever mechani-  
cal cooling is required and active, the control continuously  
monitors the supply-air temperature to verify it does not fall be-  
low the configured minimum cooling SAT limit (50 F default).  
As the SAT approaches this value, the control will increase the  
fan speed as required to ensure the SAT will remain within the  
limit. The fan will operate at lowest speed to maximize latent  
capacity during cooling.  
Occupancy Schedules — The controller will be occupied 24/7  
until a time schedule has been configured using either Field  
Assistant, i-Vu Open, BACview6 or a third party control system  
to enable/disable the BAS on/off point. The BAS point can be  
disabled by going to Config, then Unit, then Occupancy Sched-  
ules and changing the point from enable to disable then click-  
ing OK.  
NOTE: This point must be enabled in order for the i-Vu Open,  
Field Assistant, or BACview6 control system to assign a time  
schedule to the controller.  
COOLING — The WSHP Open controller will operate one or  
two stages of compression to maintain the desired cooling set  
point. The compressor outputs are controlled by the PI (propor-  
tional-integral) cooling loop and cooling stages capacity algo-  
rithm. They will be used to calculate the desired number of  
stages needed to satisfy the space by comparing the space tem-  
perature (SPT) to the appropriate cooling set point. The water  
side economizer, if applicable, will be used for first stage cool-  
ing in addition to the compressor(s). The following conditions  
must be true in order for the cooling algorithm to run:  
Schedule_schedule — The unit will operate according to the  
schedule configured and stored in the unit. The schedule is  
accessible via the BACview6 Handheld tool, i-Vu Open, or  
Field Assistant control system. The daily schedule consists of a  
start/stop time (standard or 24-hour mode) and seven days of  
the week, starting with Monday and ending on Sunday. To  
enter a daily schedule, navigate to Config, then Sched, then  
enter BACview6 Admin Password (1111), then go to  
schedule_schedule. From here, enter either a Weekly or Excep-  
tion schedule for the unit.  
• Cooling is set to Enable.  
• Heating mode is not active and the compressor time  
guard has expired.  
• Condensate overflow input is normal.  
• If occupied, the SPT is greater than the occupied cooling  
set point.  
• Space temperature reading is valid.  
• If unoccupied, the SPT is greater than the unoccupied  
cooling set point.  
• If economizer cooling is available and active and the  
economizer alone is insufficient to provide enough  
cooling.  
• OAT (if available) is greater than the cooling lockout  
temperature.  
Occupancy Input Contact — The WSHP Open controller has  
the capability to use an external dry contact closure to deter-  
mine the occupancy status of the unit. The Occupancy Sched-  
ules will need to be disabled in order to utilize the occupancy  
contact input.  
NOTE: Scheduling can only be controlled from one source.  
BAS (Building Automation System) On/Off  
—
A
BAS  
system that supports network scheduling can control the unit  
through a network communication and the BAS scheduling  
function once the Occupancy Schedules have been disabled.  
NOTE: Scheduling can either be controlled via the unit or the  
BAS, but not both.  
INDOOR FAN — The indoor fan will operate in any one of  
three modes depending on the user configuration selected.  
Fan mode can be selected as Auto, Continuous, or Always  
On. In Auto mode, the fan is in intermittent operation during  
both occupied and unoccupied periods. Continuous fan mode  
is intermittent during unoccupied periods and continuous dur-  
ing occupied periods. Always On mode operates the fan con-  
tinuously during both occupied and unoccupied periods. In the  
default mode, Continuous, the fan will be turned on whenever  
any one of the following is true:  
If all the above conditions are met, the compressors will be  
energized as required, otherwise they will be deenergized. If  
cooling is active and should the SAT approach the minimum  
SAT limit, the fan will be indexed to the next higher speed.  
Should this be insufficient and if the SAT falls further (equal to  
the minimum SAT limit), the fan will be indexed to the maxi-  
mum speed. If the SAT continues to fall 5° F below the mini-  
mum SAT limit, all cooling stages will be disabled.  
During Cooling mode, the reversing valve output will be  
held in the cooling position (either B or O type as configured)  
even after the compressor is stopped. The valve will not switch  
position until the Heating mode is required.  
The configuration screens contain the minimum SAT  
parameter as well as cooling lockout based on outdoor-air  
temperature (OAT) Both can be adjusted to meet various  
specifications.  
There is a 5-minute off time for the compressor as well as a  
5-minute time delay when staging up to allow the SAT to  
achieve a stable temperature before energizing a second stage  
• The unit is in occupied mode as determined by its occu-  
pancy status.  
• There is a demand for cooling or heating in the unoccu-  
pied mode.  
• There is a call for dehumidification (optional).  
When power is reapplied after a power outage, there will be  
a configured time delay of 5 to 600 seconds before starting the  
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of capacity. Likewise, a 45-second delay is used when staging  
down.  
After a compressor is staged off, it may be restarted again  
after a normal time-guard period of 5 minutes and if the  
supply-air temperature has increased above the minimum  
supply-air temperature limit.  
AUXILIARY HEAT — The WSHP Open controller can con-  
trol a two-position, modulating water, or steam valve connect-  
ed to a coil on the discharge side of the unit and supplied by a  
boiler or a single-stage ducted electric heater in order to main-  
tain the desired heating set point. Should the compressor capac-  
ity be insufficient or a compressor failure occurs, the auxiliary  
heat will be used. Unless the compressor fails, the auxiliary  
heat will only operate to supplement the heat provided by the  
compressor if the space temperature falls more than one degree  
below the desired heating set point (the amount is configu-  
rable). The heat will be controlled so the SAT will not exceed  
the maximum heating SAT limit.  
Auxiliary Modulating Hot Water/Steam Heating Reheat  
— The control can modulate a hot water or steam valve con-  
nected to a coil on the discharge side of the unit and supplied  
by a boiler in order to maintain the desired heating set point  
should the compressor capacity be insufficient or a compressor  
failure occurs. Unless a compressor fault condition exists, the  
valve will only operate to supplement heat provided by com-  
pressor if the space temperature falls more than one degree be-  
low the desired heating set point. The valve will be controlled  
so the SAT will not exceed maximum heating SAT limit.  
The WSHP Open controller provides a status input to moni-  
tor the compressor operation. The status is monitored to deter-  
mine if the compressor status matches the commanded state.  
This input is used to determine if a refrigerant safety switch or  
other safety device has tripped and caused the compressor to  
stop operating normally. If this should occur, an alarm will be  
generated to indicate the faulted compressor condition.  
HEATING — The WSHP Open controller will operate one or  
two stages of compression to maintain the desired heating set  
point. The compressor outputs are controlled by the heating PI  
(proportional-integral) loop and heating stages capacity algo-  
rithm. They will be used to calculate the desired number of  
stages needed to satisfy the space by comparing the space tem-  
perature (SPT) to the appropriate heating set point. The follow-  
ing conditions must be true in order for the heating algorithm to  
run:  
Two-Position Hot Water/Steam Heating Reheat — The con-  
trol can operate a two-position, NO or NC, hot water or steam  
valve connected to a coil on the discharge side of the unit and  
supplied by a boiler in order to maintain the desired heating set  
point should the compressor capacity be insufficient or a com-  
pressor failure occurs. Unless a compressor fault condition ex-  
ists, the valve will only open to supplement the heat provided  
by the compressor if the space temperature falls more than one  
degree below the desired heating set point. The valve will be  
controlled so the SAT will not exceed the maximum heating  
SAT limit. The heat stage will also be subject to a 2-minute  
minimum OFF time to prevent excessive valve cycling.  
Single Stage Electric Auxiliary Heat — The control can op-  
erate a field-installed single stage of electric heat installed on  
the discharge side of the unit in order to maintain the desired  
heating set point should the compressor capacity be insufficient  
or a compressor failure occurs. Unless a compressor fault con-  
dition exists, the heat stage will only operate to supplement the  
heat provided by the compressor if the space temperature falls  
more than one degree below the desired heating set point. The  
heat stage will be controlled so the SAT will not exceed the  
maximum heating SAT limit. The heat stage will also be  
subject to a 2-minute minimum OFF time to prevent excessive  
cycling.  
• Heating is set to Enable.  
• Cooling mode is not active and the compressor time  
guard has expired.  
• Condensate overflow input is normal.  
• If occupied, the SPT is less than the occupied heating set  
point.  
• Space temperature reading is valid.  
• If unoccupied, the SPT is less than the unoccupied heat-  
ing set point.  
• OAT (if available) is less than the heating lockout  
temperature.  
If all the above conditions are met, the heating outputs will  
be energized as required, otherwise they will be deenergized. If  
the heating is active and should the SAT approach the maxi-  
mum SAT limit, the fan will be indexed to the next higher  
speed. Should this be insufficient, and the SAT rises further  
reaching the maximum heating SAT limit, the fan will be  
indexed to the maximum speed. If the SAT still continues to  
rise 5F above the maximum limit, all heating stages will be  
disabled.  
During Heating mode, the reversing valve output will be  
held in the heating position (either B or O type as configured)  
even after the compressor is stopped. The valve will not switch  
position until the Cooling mode is required.  
INDOOR AIR QUALITY (IAQ) AND DEMAND CON-  
TROLLED VENTILATION (DCV) — If the optional in-  
door air quality sensor is installed, the WSHP Open controller  
can maintain indoor air quality via a modulating OA damper  
providing demand controlled ventilation. The control operates  
the modulating OA damper during occupied periods. The con-  
trol monitors the CO2 level and compares it to the configured  
set points, adjusting the ventilation rate as required. The control  
provides proportional ventilation to meet the requirements of  
ASHRAE (American Society of Heating, Refrigerating and  
Air Conditioning Engineers) specifications by providing a base  
ventilation rate and then increasing the rate as the CO2 level in-  
creases. The control will begin to proportionally increase venti-  
lation when the CO2 level rises above the start ventilation set  
point and will reach the full ventilation rate when the CO2 level  
is at or above the maximum set point. A user-configurable min-  
imum damper position ensures that proper base ventilation is  
delivered when occupants are not present. The IAQ configura-  
tions can be accessed through the configuration screen. The  
following conditions must be true in order for this algorithm to  
run:  
The configuration screens contain the maximum SAT  
parameter as well as heating lockout based on outdoor-air  
temperature (OAT); both can be adjusted to meet various  
specifications.  
There is a 5-minute off time for the compressor as well as a  
5-minute time delay when staging up to allow the SAT to  
achieve a stable temperature before energizing a second stage  
of capacity. Likewise, a 45-second delay is used when staging  
down.  
After a compressor is staged off, it may be restarted again  
after a normal time-guard period of 5 minutes and if the sup-  
ply-air temperature has fallen below the maximum supply air  
temperature limit.  
The WSHP Open controller provides a status input to moni-  
tor the compressor operation. The status is monitored to deter-  
mine if the compressor status matches the commanded state.  
This input is used to determine if a refrigerant safety switch or  
other safety device has tripped and caused the compressor to  
stop operating normally. If this should occur, an alarm will be  
generated to indicate the faulted compressor condition. Also, if  
auxiliary heat is available (see below), the auxiliary heat will  
operate to replace the reverse cycle heating and maintain the  
space temperature as required.  
• Damper control is configured for DCV.  
• The unit is in an occupied mode.  
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• The IAQ sensor reading is greater than the DCV start  
control set point.  
The control has four user adjustable set points: DCV start  
control set point, DCV maximum control set point, minimum  
damper position, and DCV maximum damper position.  
Two-Position OA Damper — The control can be configured  
to operate a ventilation damper in a two-position ventilation  
mode to provide the minimum ventilation requirements during  
occupied periods.  
WATERSIDE ECONOMIZER — The WSHP Open control-  
ler has the capability of providing modulating or two-position  
water economizer operation (for a field-installed economizer  
coil mounted to the entering air side of the unit and connected  
to the condenser water loop) in order to provide free cooling  
(or preheating) when water conditions are optimal. Water econ-  
omizer settings can be accessed through the equipment status  
screen. The following conditions must be true for economizer  
operation:  
heat is required. The valve will be controlled in a similar man-  
ner except to satisfy the heating requirement. Should the coil  
capacity be insufficient to satisfy the space load for more than  
5 minutes, then the compressor will be started to satisfy the  
load. Should the SAT reach the maximum heating SAT limit,  
the economizer valve will close during compressor operation.  
DEMAND LIMIT — The WSHP Open controller has the  
ability to accept three levels of demand limit from the network.  
In response to a demand limit, the unit will decrease its heating  
set point and increase its cooling set point to widen the range in  
order to immediately lower the electrical demand. The amount  
of temperature adjustment in response is user adjustable for  
both heating and cooling and for each demand level. The re-  
sponse to a particular demand level may also be set to zero.  
CONDENSER WATER LINKAGE — The control pro-  
vides optimized water loop operation using an universal con-  
troller (UC) open loop controller. Loop pump operation is auto-  
matically controlled by WSHP equipment occupancy sched-  
ules, unoccupied demand and tenant override conditions.  
Positive pump status feedback prevents nuisance fault trips.  
The condenser water linkage operates when a request for con-  
denser water pump operation is sent from each WSHP to the  
loop controller. This request is generated whenever any WSHP  
is scheduled to be occupied, is starting during optimal start (for  
warm-up or pull down prior to occupancy), there is an unoccu-  
pied heating or cooling demand, or a tenant pushbutton over-  
ride. At each WSHP, the water loop temperature and the loop  
pump status is given. The WSHP will NOT start a compressor  
until the loop pumps are running or will shutdown the com-  
pressors should the pumps stop. This prevents the WSHP from  
operating without water flow and thus tripping out on refriger-  
ant pressure, causing a lockout condition. The WSHP Open  
controller control will prevent this from occurring. Also, the  
loop controller can be configured to start the pumps only after a  
configurable number of WSHPs are requesting operation (from  
1-"N"). This can be used to prevent starting the entire loop op-  
eration for only one WSHP. Meanwhile, the WSHPs will not  
operate if the loop pump status is off and therefore the WSHP  
compressor will not run.  
• SAT reading is available.  
• LWT reading is available.  
• If occupied, the SPT is greater than the occupied cooling  
set point or less than the occupied heating set point and  
the condenser water is suitable.  
• Space temperature reading is valid.  
• If unoccupied, the SPT is greater than the unoccupied  
cooling set point or less than the unoccupied heating set  
point and the condenser water is suitable.  
Modulating Water Economizer Control — The control has  
the capability to modulate a water valve to control condenser  
water flowing through a coil on the entering air side of the unit.  
Cooling — The purpose is to provide an economizer cooling  
function by using the water loop when the entering water loop  
temperature is suitable (at least 5° F below space temperature).  
If the water loop conditions are suitable, then the valve will  
modulate open as required to maintain a supply-air temperature  
that meets the load conditions. Should the economizer coil ca-  
pacity alone be insufficient for a period greater than 5 minutes,  
or should a high humidity condition occur, then the compressor  
will also be started to satisfy the load. Should the SAT ap-  
proach the minimum cooling SAT limit, the economizer valve  
will modulate closed during compressor operation.  
COMPLETE C AND DELUXE D BOARD  
SYSTEM TEST  
Heating — Additionally, the control will modulate the water  
valve should the entering water loop temperature be suitable  
for heating (at least 5° F above space temperature) and heat is  
required. The valve will be controlled in a similar manner ex-  
cept to satisfy the heating requirement. Should the economizer  
coil capacity alone be insufficient to satisfy the space load con-  
ditions for more than 5 minutes, then the compressor will be  
started to satisfy the load. Should the SAT approach the maxi-  
mum heating SAT limit, the economizer valve will modulate  
closed during compressor operation.  
Two-Position Water Economizer Control — The control has  
the capability to control a NO or NC, two-position water valve  
to control condenser water flow through a coil on the entering  
air side of the unit.  
Cooling — The purpose is to provide a cooling economizer  
function directly from the condenser water loop when the en-  
tering water loop temperature is suitable (at least 5° F below  
space temperature). If the optional coil is provided and the wa-  
ter loop conditions are suitable, then the valve will open to pro-  
vide cooling to the space when required. Should the capacity  
be insufficient for a period greater than 5 minutes, or should a  
high humidity condition occur, then the compressor will be  
started to satisfy the load. Should the SAT reach the minimum  
cooling SAT limit, the economizer valve will close during  
compressor operation.  
System testing provides the ability to check the control  
operation. The control enters a 20-minute Test mode by  
momentarily shorting the test pins. All time delays are in-  
creased 15 times. See Fig. 13-17.  
Test Mode — To enter Test mode on Complete C or Deluxe  
D controls, cycle the fan 3 times within 60 seconds. The LED  
(light-emitting diode) will flash a code representing the last fault  
when entering the Test mode. The alarm relay will also power on  
and off during Test mode. See Tables 29-31. To exit Test mode,  
short the terminals for 3 seconds or cycle the fan 3 times within  
60 seconds.  
NOTE: Deluxe D control has a flashing code and alarm relay  
cycling code that will both have the same numerical label.  
For example, flashing code 1 will have an alarm relay cycling  
code 1. Code 1 indicates the control has not faulted since the  
last power off to power on sequence.  
WSHP Open Test Mode — To enter WSHP Open test  
mode, navigate from the BACview6 home screen to the config-  
uration screen. Choose the service screen and enable unit test.  
The controller will then test the following:  
FAN TEST — Tests all fan speeds, sequences fan from low to  
high, and operates each speed for one minute. Resets to disable  
on completion.  
COMPRESSOR TEST — Tests compressor cooling and  
heating operation. Sequences cooling stage 1 then cooling  
Heating — Additionally, the economizer control will open the  
water valve should the entering water loop temperature be suit-  
able for heating (at least 5° F above space temperature) and  
36  
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stage 2 followed by heating stage 2 then reduces capacity to  
heating stage 1. Operates for 1 minute per step.  
TEST LED — Test LED will be activated any time the De-  
luxe D control is in test mode. The Test LED light is yellow.  
FAULT LED — Fault LED light is red. The fault LED will al-  
ways flash a code representing the last fault in memory. If there  
is no fault in memory, the fault LED will flash code 1 on the  
and appear as 1 fast flash alternating with a 10-second pause.  
See Table 31.  
DEHUMIDIFICATION TEST — Tests dehumidification  
mode. Operates for 2 minutes.  
AUXILIARY HEATING TEST — Tests auxiliary heat.  
Sequences fan on and enables heating coil for 1 minute.  
H2O ECONOMIZER TEST — Tests entering/returning  
water loop economizer operation. Sequences fan and opens  
economizer water valve for one minute.  
Table 29 — Complete C Control Current LED  
Status and Alarm Relay Operations  
LED STATUS  
DESCRIPTION OF OPERATION  
ALARM RELAY  
OPEN VENT DAMPER 100% TEST — Tests outside air  
(OA) damper operation.  
PREPOSITION OA DAMPER — Prepositions OA damper  
actuator to set proper preload.  
Normal Mode  
Open  
Cycle (closed 5  
sec., Open 25 sec.)  
On  
Normal Mode with PM Warning  
Complete C Control is  
non-functional  
Off  
Open  
NOTE: The auxiliary heating test, H2O economizer test, open  
vent damper 100% test, and preposition OA damper features  
will not be visible on the screen unless configured.  
Once tests are complete, set unit test back to disable. Unit will  
automatically reset to disable after 1 hour.  
Slow Flash  
Fast Flash  
Fault Retry  
Lockout  
Open  
Closed  
Open (Closed after  
15 minutes)  
Cycling Code 1  
Cycling Code 2  
Cycling Code 3  
Cycling Code 4  
Cycling Code 5  
Cycling Code 6  
Slow Flash  
Over/Under Voltage Shutdown  
Flashing Code 1 Test Mode — No fault in memory  
Flashing Code 2 Test Mode — HP Fault in memory  
Flashing Code 3 Test Mode — LP Fault in memory  
Flashing Code 4 Test Mode — FP1 Fault in memory  
Flashing Code 5 Test Mode — FP2 Fault in memory  
Flashing Code 6 Test Mode — CO Fault in memory  
Retry Mode — In Retry mode, the status LED will start to  
flash slowly to signal that the control is trying to recover from  
an input fault. The control will stage off the outputs and try to  
again satisfy the thermostat used to terminal Y. Once the ther-  
mostat input calls are satisfied, the control will continue normal  
operation.  
NOTE: If 3 consecutive faults occur without satisfying the  
thermostat input call to terminal Y, the control will go into  
lockout mode. The last fault causing the lockout is stored in  
memory and can be viewed by entering Test mode.  
Test Mode — Over/Under shutdown  
Flashing Code 7  
Cycling Code 7  
Cycling Code 8  
Cycling Code 9  
in memory  
Flashing Code 8  
Flashing Code 9  
Test Mode — PM in memory  
Test Mode — FP1/FP2 Swapped  
Fault in memory  
LEGEND  
CO  
FP  
HP  
—
—
—
Condensate Overflow  
Freeze Protection  
High Pressure  
LED  
LP  
PM  
—
—
—
Light-Emitting Diode  
Low Pressure  
Performance Monitor  
Aquazone™ Deluxe D Control LED Indica-  
NOTES:  
1. Slow flash is 1 flash every 2 seconds.  
2. Fast flash is 2 flashes every 1 second.  
tors — There are 3 LED indicators on the Deluxe D control:  
3. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by  
a 10-second pause. This sequence will repeat continually until the fault is  
cleared.  
STATUS LED — Status LED indicates the current status or  
mode of the Deluxe D control. The Status LED light is green.  
Table 30 — Complete C Control LED Code and  
Fault Descriptions  
LED  
CODE  
FAULT  
DESCRIPTION  
1
2
No fault in memory  
High-Pressure Switch  
There has been no fault since the last power-down to power-up sequence  
HP open instantly  
3
4
5
6
Low-Pressure Switch  
LP open for 30 continuous seconds before or during a call (bypassed for first 60 seconds)  
FP1 below Temp limit for 30 continuous seconds (bypassed for first 60 seconds of operation)  
FP2 below Temp limit for 30 continuous seconds (bypassed for first 60 seconds of operation)  
Sense overflow (grounded) for 30 continuous seconds  
Freeze Protection Coax — FP1  
Freeze Protection Air Coil — FP2  
Condensate overflow  
7 (Autoreset)  
Over/Under Voltage Shutdown  
PM Warning  
FP1 and FP2 Thermistors are swapped  
"R" power supply is <19VAC or >30VAC  
Performance Monitor Warning has occurred.  
FP1 temperature is higher than FP2 in heating/test mode, or FP2 temperature is higher than  
FP1 in cooling/test mode.  
8
9
LEGEND  
FP  
—
—
—
Freeze Protection  
LP  
PM  
—
—
Low Pressure  
Performance Monitor  
HP  
High Pressure  
LED  
Light-Emitting Diode  
37  
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Table 31 — Aquazone Deluxe D Control Current LED Status and Alarm Relay Operations  
STATUS LED  
(Green)  
TEST LED  
(Yellow)  
DESCRIPTION  
FAULT LED (Red)  
ALARM RELAY  
Normal Mode  
Normal Mode with PM  
Deluxe D Control is non-functional  
Test Mode  
On  
On  
Off  
Off  
Off  
On  
—
Flash Last Fault Code in Memory  
Flashing Code 8  
Open  
Cycle (closed 5 sec, open 25 sec, …)  
Off  
Off  
Open  
—
Flash Last Fault Code in Memory  
Flash Last Fault Code in Memory  
Flash Last Fault Code in Memory  
Flash Last Fault Code in Memory  
Flashing Code 1  
Cycling Appropriate Code  
Night Setback  
ESD  
Invalid T-stat Inputs  
No Fault in Memory  
HP Fault  
Flashing Code 2  
Flashing Code 3  
Flashing Code 4  
On  
—
—
—
—
—
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Open  
Slow Flash  
Slow Flash  
Slow Flash  
Slow Flash  
Slow Flash  
Slow Flash  
Fast Flash  
Fast Flash  
Fast Flash  
Fast Flash  
Fast Flash  
Flashing Code 2  
Open  
LP Fault  
FP1 Fault  
FP2 Fault  
CO Fault  
Flashing Code 3  
Open  
Flashing Code 4  
Open  
Flashing Code 5  
Open  
Flashing Code 6  
Open  
Over/Under Voltage  
HP Lockout  
Flashing Code 7  
Open (closed after 15 minutes)  
Flashing Code 2  
Closed  
Closed  
Closed  
Closed  
Closed  
LP Lockout  
FP1 Lockout  
FP2 Lockout  
CO Lockout  
Flashing Code 3  
Flashing Code 4  
Flashing Code 5  
Flashing Code 6  
LEGEND  
NOTES:  
1. If there is no fault in memory, the Fault LED will flash code 1.  
2. Codes will be displayed with a 10-second Fault LED pause.  
3. Slow flash is 1 flash every 2 seconds.  
CO  
ESD  
FP  
—
—
—
Condensate Overflow  
Emergency Shutdown  
Freeze Protection  
HP  
LP  
PM  
—
—
—
High Pressure  
Low Pressure  
Performance Monitor  
4. Fast flash is 2 flashes every 1 second.  
5. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a  
10-second pause. This sequence will repeat continually until the fault is  
cleared.  
Closed-loop systems must have a minimum of 15 psig dur-  
ing the summer and 40 psig during the winter. Generally, the  
higher the water flow through the bail, the lower the chance for  
sealing.  
SERVICE  
Perform the procedures outlined below periodically, as  
indicated.  
Check P trap frequently for proper operation.  
IMPORTANT: When a compressor is removed from this  
unit, system refrigerant circuit oil will remain in the com-  
pressor. To avoid leakage of compressor oil, the refrigerant  
lines of the compressor must be sealed after it is removed.  
IMPORTANT: To avoid fouled machinery and extensive  
unit clean-up, DO NOT operate units without filters in  
place. DO NOT use equipment as a temporary heat source  
during construction.  
IMPORTANT: All refrigerant discharged from this unit  
must be recovered without exception. Technicians must fol-  
low industry accepted guidelines and all local, state and fed-  
eral statutes for the recovery and disposal of refrigerants.  
Condensate Drain Pans — Check condensate drain  
pans for algae growth twice a year. If algae growth is apparent,  
consult a water treatment specialist for proper chemical treat-  
ment. Applying an algaecide every three months will typically  
eliminate algae problems in most locations.  
IMPORTANT: To avoid the release of refrigerant into the  
atmosphere, the refrigerant circuit of this unit must only be  
serviced by technicians who meet local, state and federal  
proficiency requirements.  
Refrigerant System — Verify air and water flow rates  
are at proper levels before servicing. To maintain sealed circuit-  
ry integrity, do not install service gauges unless unit operation  
appears abnormal.  
Check to see that unit is within the superheat and subcool-  
ing temperature ranges shown in Tables 16-26. If the unit is not  
within these ranges, recover and reweigh in refrigerant charge.  
IMPORTANT: To prevent injury or death due to electrical  
shock or contact with moving parts, open unit disconnect  
switch before servicing unit.  
Filters — Filters must be clean for maximum performance.  
Inspect filters every month under normal operating conditions.  
Replace when necessary.  
Compressor — Conduct annual amperage checks to en-  
sure that amp draw is no more than 10% greater than indicated  
on the serial plate data.  
IMPORTANT: Units should never be operated with-  
out a filter.  
Fan Motors — All units have lubricated fan motors. Fan  
motors should never be lubricated unless obvious, dry opera-  
tion is suspected. Periodic maintenance oiling is NOT recom-  
mended as it will result in dirt accumulating in the excess oil  
and cause eventual motor failure. Conduct annual dry opera-  
tion check and amperage check to ensure amp draw is no more  
than 10% greater than indicated on serial plate data.  
Water Coil — Keep all air out of the water coil. Check  
open loop systems to be sure the well head is not allowing air  
to infiltrate the water line. Always keep lines airtight.  
Inspect heat exchangers regularly, and clean more frequent-  
ly if the unit is located in a “dirty” environment. Keep the heat  
exchanger full of water at all times. Open-loop systems should  
have an inverted P trap placed in the discharge line to keep  
water in the heat exchanger during off cycles.  
Condensate Drain Cleaning — Clean the drain line  
and unit drain pan at the start of each cooling season. Check  
flow by pouring water into drain. Be sure trap is filled to main-  
tain an air seal.  
38  
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FORCED CIRCULATION METHOD — Fully open vent  
pipe when filling condenser. The vent may be closed when  
condenser is full and pump is operating. See Fig. 31.  
Regulate flow to condenser with a supply line valve. If  
pump is a nonoverloading type, the valve may be fully closed  
while pump is running.  
For average scale deposit, allow solution to remain in  
condenser overnight. For heavy scale deposit, allow 24 hours.  
Drain condenser and flush with clean water. Follow acid manu-  
facturer’s instructions.  
Air Coil Cleaning — Remove dirt and debris from evap-  
orator coil as required by condition of the coil. A 10% solution  
of dishwasher detergent and water is recommended for  
cleaning both sides of the coil, followed by a thorough water  
rinse. Clean coil with a stiff brush, vacuum cleaner, or com-  
pressed air. Use a fin comb of the correct tooth spacing when  
straightening mashed or bent coil fins.  
Condenser Cleaning — Water-cooled condensers may  
require cleaning of scale (water deposits) due to improperly  
maintained closed-loop water systems. Sludge build-up may  
need to be cleaned in an open water tower system due to  
induced contaminants.  
Local water conditions may cause excessive fouling or  
pitting of tubes. Condenser tubes should therefore be cleaned at  
least once a year, or more often if the water is contaminated.  
GAS VENT  
a50-6287ef  
PUMP  
PRIMING  
CONN.  
GLOBE  
VALVES  
SUCTION  
Proper water treatment can minimize tube fouling and  
pitting. If such conditions are anticipated, water treatment  
analysis is recommended. Refer to the Carrier System Design  
Manual, Part 5, for general water conditioning information.  
SUPPLY  
1” PIPE  
PUMP  
SUPPORT  
CONDENSER  
CAUTION  
TANK  
REMOVE WATER  
REGULATING VALVE  
Follow all safety codes. Wear safety glasses and rubber  
gloves when using inhibited hydrochloric acid solution.  
Observe and follow acid manufacturer’s instructions.  
RETURN  
FINE MESH  
SCREEN  
Clean condensers with an inhibited hydrochloric acid  
solution. The acid can stain hands and clothing, damage  
concrete, and, without inhibitor, damage steel. Cover sur-  
roundings to guard against splashing. Vapors from vent pipe  
are not harmful, but take care to prevent liquid from being  
carried over by the gases.  
Warm solution acts faster, but cold solution is just as effec-  
tive if applied for a longer period.  
GRAVITY FLOW METHOD — Do not add solution faster  
than vent can exhaust the generated gases.  
Fig. 31 — Forced Circulation Method  
Checking System Charge — Units are shipped with  
full operating charge. If recharging is necessary:  
1. Insert thermometer bulb in insulating rubber sleeve on  
liquid line near filter drier. Use a digital thermometer for  
all temperature measurements. DO NOT use a mercury  
or dial-type thermometer.  
2. Connect pressure gage to discharge line near compressor.  
3. After unit conditions have stabilized, read head pressure  
on discharge line gage.  
When condenser is full, allow solution to remain overnight,  
then drain condenser and flush with clean water. Follow acid  
manufacturer’s instructions. See Fig. 30.  
NOTE: Operate unit a minimum of 15 minutes before  
checking charge.  
4. From standard field-supplied Pressure-Temperature  
chart for R-410A, find equivalent saturated condens-  
ing temperature.  
5. Read liquid line temperature on thermometer; then  
subtract from saturated condensing temperature. The dif-  
ference equals subcooling temperature.  
FILL CONDENSER WITH  
CLEANING SOLUTION. DO  
PAIL  
NOT ADD SOLUTION  
MORE RAPIDLY THAN  
VENT CAN EXHAUST  
GASES CAUSED BY  
FUNNEL  
CHEMICAL ACTION.  
6. Compare the subcooling temperature with the normal  
temperature listed in Tables 15-25. If the measured liquid  
line temperature does not agree with the required liquid  
line temperature, ADD refrigerant to raise the tempera-  
ture or REMOVE refrigerant (using standard practices) to  
lower the temperature (allow a tolerance of ± 3° F).  
1”  
PIPE  
VENT  
PIPE  
5’ APPROX  
3’ TO 4’  
Refrigerant Charging  
CONDENSER  
WARNING  
To prevent personal injury, wear safety glasses and gloves  
when handling refrigerant. Do not overcharge system —  
this can cause compressor flooding.  
a50-6286ef  
PAIL  
NOTE: Do not vent or depressurize unit refrigerant to  
atmosphere. Remove and recover refrigerant following  
accepted practices.  
Fig. 30 — Gravity Flow Method  
39  
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Air Coil Fan Motor Removal  
CAUTION  
Control Sensors — The control system employs 2 nom-  
inal 10,000 ohm thermistors (FP1 and FP2) that are used for  
freeze protection. Be sure FP1 is located in the discharge fluid  
and FP2 is located in the air discharge. See Fig. 33.  
Before attempting to remove fan motors or motor mounts,  
place a piece of plywood over evaporator coils to prevent  
coil damage.  
WSHP Open Controller — With the WSHP Open con-  
troller option, the 100 most recent alarms can be viewed using  
the BACview6 alarm status and alarm history.  
To view the alarms:  
Disconnect motor power wires from motor terminals before  
motor is removed from unit.  
1. Shut off unit main power supply.  
2. Loosen bolts on mounting bracket so that fan belt can be  
removed.  
3. Loosen and remove the 2 motor mounting bracket bolts  
on left side of bracket.  
1. Navigate to the Alarm Status screen from the Home  
screen using the arrow softkeys. The screen will display  
the current alarm status, either normal or Alarm, and al-  
low for scrolling through the unit’s alarm status.  
2. From the Alarm Status screen, press the Alarm softkey to  
view the 100 most recent alarms which are labeled with  
date and time for easy reference.  
4. Slide motor/bracket assembly to extreme right and lift out  
through space between fan scroll and side frame. Rest  
motor on a high platform such as a step ladder. Do not  
allow motor to hang by its power wires.  
NOTE: Active faults can be viewed by scrolling down,  
these faults indicate a possible bad sensor or some condi-  
tion which may not merit an alarm.  
3. To view alarms which have been corrected, scroll down  
through the Alarm screen to Return Top Normal screen.  
Replacing the WSHP Open Controller’s  
Battery — The WSHP Open controller’s 10-year lithium  
CR2032 battery provides a minimum of 10,000 hours of data  
retention during power outages.  
NOTE: Alarms are automatically reset once alarm con-  
dition has been corrected.  
See Table 32 for possible alarm cause and solution.  
NOTE: Power must be ON to the WSHP Open controller  
when replacing the battery, or the date, time and trend data will  
be lost.  
1. Remove the battery from the controller, making note of  
the battery's polarity.  
90.0  
80.0  
70.0  
60.0  
50.0  
40.0  
30.0  
20.0  
10.0  
0.0  
2. Insert the new battery, matching the battery's polarity  
with the polarity indicated on the WSHP Open controller.  
TROUBLESHOOTING  
(Fig. 32 and 33, and Table 32)  
When troubleshooting problems with a WSHP, consider the  
following.  
Thermistor — A thermistor may be required for single-  
phase units where starting the unit is a problem due to low  
voltage. See Fig. 32 for thermistor nominal resistance.  
0.0  
20.0  
40.0  
60.0  
80.0 100.0 120.0 140.0  
a50-6270ef  
Temperature (degF)  
Fig. 32 — Thermistor Nominal Resistance  
a50-8163  
AIR  
COIL  
SUCTION  
AIRFLOW  
(°F)  
AIRFLOW  
(°F)  
COMPRESSOR  
THERMISTOR  
EXPANSION  
VALVE  
COAX  
DISCHARGE  
FP2  
FP1  
CONDENSATE  
OVERFLOW  
(CO)  
LIQUID  
LINE  
WATER IN  
WATER OUT  
LEGEND  
AIR COIL  
WATER  
COIL  
PROTECTION  
FREEZE  
COAX — Coaxial Heat Exchanger  
Airflow  
PROTECTION  
Refrigerant Liquid Line Flow  
Fig. 33 — FP1 and FP2 Thermistor Location  
40  
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Table 32 — Troubleshooting  
FAULT  
HEATING COOLING  
POSSIBLE CAUSE  
SOLUTION  
Main Power Problems  
X
X
Green Status LED Off  
Check line voltage circuit breaker and disconnect.  
Check for line voltage between L1 and L2 on the contactor.  
Check for 24 vac between R and C on controller.  
Check primary/secondary voltage on transformer.  
Check pump operation or valve operation/setting.  
Check water flow adjust to proper flow rate.  
HP Fault — Code 2  
High Pressure  
X
X
Reduced or no water flow in  
cooling  
Water temperature out of  
range in cooling  
Bring water temperature within design parameters.  
X
X
Reduced or no airflow in heat- Check for dirty air filter and clean or replace.  
ing  
Check fan motor operation and airflow restrictions.  
Dirty air coil — construction dust etc.  
External static too high. Check Tables 8-10.  
Air temperature out of range in Bring return-air temperature within design parameters.  
heating  
X
X
X
X
X
X
X
Overcharged with refrigerant Check superheat/subcooling vs typical operating condition Tables 15-25.  
Bad HP switch  
Check switch continuity and operation. Replace.  
Check for refrigerant leaks.  
LP/LOC Fault — Code 3  
Low Pressure/Loss of  
Charge  
Insufficient charge  
Compressor pump down at  
start-up  
Check charge and start-up water flow.  
FP1 Fault — Code 4  
Water Freeze Protection  
X
Reduced or no water flow in  
heating  
Check pump operation or water valve operation/setting.  
Plugged strainer or filter. Clean or replace.  
Check water flow adjust to proper flow rate.  
Check antifreeze density with hydrometer.  
Clip JW2 jumper for antifreeze (10F) use.  
X
X
Inadequate antifreeze level  
Improper freeze protect set-  
ting (30F vs 10F)  
X
X
Water temperature out of  
range  
Bring water temperature within design parameters.  
X
X
Bad thermistor  
Check temperature and impedance correlation.  
FP2 Fault — Code 5  
Air Coil Freeze  
Protection  
Reduced or no airflow in cool- Check for dirty air filter and clean or replace.  
ing  
Check fan motor operation and airflow restrictions.  
External static too high. Check Tables 8-10.  
X
X
Air temperature out of range  
Too much cold vent air. Bring entering-air temperature within design  
parameters.  
Improper freeze protect set-  
ting (30F vs 10F)  
Normal airside applications will require 30 F only.  
X
X
X
X
X
X
X
Bad thermistor  
Blocked drain  
Improper trap  
Poor drainage  
Check temperature and impedance correlation.  
Check for blockage and clean drain.  
Condensate Fault —  
Code 6  
Check trap dimensions and location ahead of vent.  
Check for piping slope away from unit.  
Check slope of unit toward outlet.  
Poor venting. Check vent location.  
X
X
Moisture on sensor  
Under voltage  
Check for moisture shorting to air coil.  
Over/Under Voltage —  
Code 7  
(Auto Resetting)  
X
Check power supply and 24 vac voltage before and during operation.  
Check power supply wire size.  
Check compressor starting.  
Check 24 vac and unit transformer tap for correct power supply voltage.  
Check power supply voltage and 24 vac before and during operation.  
Check 24 vac and unit transformer tap for correct power supply voltage.  
Check for poor airflow or overcharged unit.  
X
X
X
X
Over voltage  
Performance Monitor —  
Code 8  
Heating mode FP2>125F  
Cooling mode FP1>125F OR Check for poor water flow or airflow.  
FP2< 40F  
FP1 and FP2  
Thermistors —  
Code 9  
X
FP1 temperature is higher  
than FP2 temperature.  
Swap FP1 and FP2 thermistors.  
X
FP2 temperature is higher  
than FP1 temperature.  
Swap FP1 and FP2 thermistors.  
No Fault Code Shown  
Unit Short Cycles  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
No compressor operation  
Compressor overload  
Control board  
See scroll compressor rotation section on page 28.  
Check and replace if necessary.  
Reset power and check operation.  
Dirty air filter  
Check and clean air filter.  
Unit in 'Test Mode'  
Unit selection  
Reset power or wait 20 minutes for auto exit.  
Unit may be oversized for space. Check sizing for actual load of space.  
Check and replace if necessary.  
Compressor overload  
Thermostat position  
Unit locked out  
Only Fan Runs  
Ensure thermostat set for heating or cooling operation.  
Check for lockout codes. Reset power.  
Compressor overload  
Thermostat wiring  
Check compressor overload. Replace if necessary.  
Check Y and W wiring at heat pump. Jumper Y and R for compressor  
operation in Test mode.  
LEGEND  
RV — Reversing Valve  
41  
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Table 32 — Troubleshooting (cont)  
FAULT  
HEATING COOLING  
POSSIBLE CAUSE  
SOLUTION  
Only Compressor Runs  
X
X
X
X
Thermostat wiring  
Check G wiring at heat pump. Jumper G and R for fan operation.  
Check Y and W wiring at heat pump. Jumper Y and R for compressor oper-  
ation in test mode.  
X
Fan motor relay  
Jumper G and R for fan operation. Check for line voltage across BR  
contacts.  
Check fan power enable relay operation (if present).  
Check for line voltage at motor. Check capacitor.  
X
X
Fan motor  
Unit Does Not Operate in  
Cooling  
Reversing valve  
Set for cooling demand and check 24 VAC on RV coil and at control.  
If RV is stuck, run high pressure up by reducing water flow and while  
operating engage and disengage RV coil voltage to push valve.  
X
X
Thermostat setup  
Thermostat wiring  
Check for 'O' RV setup not 'B'.  
Check O wiring at heat pump. Check RV to ensure the valve is changing  
over from heating and cooling modes. A 'click' should be heard when the  
RV changes modes.  
Insufficient Capacity/  
Not Cooling or Heating  
Properly  
X
X
X
Dirty filter  
Replace or clean.  
Reduced or no airflow in  
heating  
Check for dirty air filter and clean or replace.  
Check fan motor operation and airflow restrictions.  
External static too high. Check blower Tables 8-10.  
Check for dirty air filter and clean or replace.  
Check fan motor operation and airflow restrictions.  
External static too high. Check blower Tables 8-10.  
X
X
Reduced or no airflow in  
cooling  
X
Leaky ductwork  
Check supply and return-air temperatures at the unit and at distant duct  
registers if significantly different, duct leaks are present.  
X
X
X
X
X
X
Low refrigerant charge  
Check superheat and subcooling Tables 15-25.  
Restricted metering device Check superheat and subcooling Tables 15-25. Replace.  
Defective reversing valve  
Manually check the four-way valve to ensure all valves are operational.  
Check location and for air drafts behind thermostat.  
X
X
X
Thermostat improperly  
located  
X
X
X
Unit undersized  
Recheck loads and sizing check sensible cooling load and heat pump  
capacity.  
Scaling in water heat  
exchanger  
Check for scale (water deposits) and clean if necessary.  
X
X
Inlet water too hot or cold  
Check load, loop sizing, loop backfill, ground moisture.  
Check for dirty air filter and clean or replace.  
High Head Pressure  
Reduced or no airflow in  
heating  
Check fan motor operation and airflow restrictions.  
External static too high. Check blower Tables 8-10.  
X
X
Reduced or no water flow in Check pump operation or valve operation/setting.  
cooling  
Check water flow adjust to proper flow rate. See Table 14.  
Inlet water too hot  
Check load, loop sizing, loop backfill, ground moisture.  
X
Air temperature out of range Bring return-air temperature within design parameters.  
in heating  
X
Scaling in water heat  
exchanger  
Check for scale (water deposits) and clean if necessary.  
X
X
X
X
Unit overcharged  
Check superheat and subcooling. Reweigh in charge.  
Non-condensables in  
system  
Evacuate the refrigerant, recharge the system, and then weigh the new  
refrigerant charge.  
X
X
X
Restricted metering device Check superheat and subcooling per Tables 15-25. Replace.  
Low Suction Pressure  
Reduced water flow in  
heating  
Check pump operation or water valve operation/setting.  
Plugged strainer or filter. Clean or replace.  
Check water flow adjust to proper flow rate.  
X
Water temperature out of  
range  
Bring water temperature within design parameters.  
X
Reduced airflow in cooling  
Check for dirty air filter and clean or replace.  
Check fan motor operation and airflow restrictions.  
External static too high. Check blower Tables 8-10.  
X
X
Air temperature out of range Too much cold vent air. Bring entering air temperature within design  
parameters.  
X
X
X
Insufficient charge  
Too high airflow  
Poor performance  
Too high airflow  
Unit oversized  
Check for refrigerant leaks.  
Check blower Tables 8-10.  
See 'Insufficient Capacity'.  
Check blower Tables 8-10.  
Low Discharge Air  
Temperature in Heating  
High Humidity  
X
X
Recheck loads and sizing check sensible cooling load and heat pump  
capacity.  
LEGEND  
RV — Reversing Valve  
42  
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APPENDIX A — WSHP OPEN SCREEN CONFIGURATION  
PASSWORD  
LEVEL  
SCREEN NAME  
POINT NAME  
EDITABLE  
RANGE  
DEFAULT  
NOTES  
Off, Fan Only, Economize,  
Cooling, Heating, Cont Fan,  
Test, Start Delay, Dehumidify  
Operating Mode  
Displays unit operating mode  
SPT  
SAT  
F
F
Displays SPT  
Displays SAT  
Condenser Leaving  
Temperature  
Displays leaving condenser  
water temperature  
F
Displays entering condenser  
water temperature (Value  
will not update when compressor  
is operating)  
Condenser Entering  
Temperature  
F
Off/Low Speed/  
Medium Speed  
High Speed/On  
Fan  
Displays fan speed status  
Equipment  
Status  
No Password  
Required  
Compressor Capacity  
Damper Position  
H2O Economizer  
0 - 100%  
0 - 100%  
0 - 100%  
Displays compressor capacity  
Displays current damper position  
(Viewable only if Ventilation DMP  
Type = 2 position or DCV)  
Displays position of economizer valve  
Displays position of auxiliary  
reheat valve (Viewable only if Leaving  
Air Auxiliary Heat Type = 2 position,  
1 stage Elect or Modulating)  
Auxiliary Heat  
0 - 100%  
Displays space RH% (Viewable only if  
Humidity Sensor = Installed)  
Space RH  
0 - 100%  
Displays if dehumidification is active  
(Viewable only if Factory  
Dehumidification Reheat = Installed)  
Dehumidification  
Inactive/Active  
IAQ CO2  
0 - 9999 ppm  
Normal/Alarm  
Displays the space CO2 level  
Displays current space  
temperature condition  
SPT Alarm Status  
Displays the SPT that  
exceeded the alarm limit (when SPT  
alarm above is in Alarm)  
Alarming SPT  
F
F
Displays the SPT alarm limit that was  
exceeded; causing the alarm condition  
(when SPT alarm above is in Alarm)  
SPT Alarm Limit  
Displays the status of the Rnet  
SPT sensor - ALARM is displayed  
should the sensor fail to communicate  
with the control module  
SPT Sensor Alarm  
Status  
Normal/Alarm  
IAQ Alarm Status  
Normal/Alarm  
Normal/Alarm  
Normal/Alarm  
Normal/Alarm  
Current IAQ/ventilation condition  
Current compressor condition  
Current SAT condition  
Compressor Alarm  
Status  
No Password  
Required  
Alarm Status  
SAT Alarm Status  
Condensate Overflow  
Alarm Status  
Current status of the condensate  
drain (overflow switch)  
Condenser Water Tem-  
perature Alarm Status  
Current status of the  
condenser water  
Normal/Alarm  
Filter Alarm Status  
Normal/Alarm  
Normal/Alarm  
Current filter condition  
Space RH Alarm Status  
Current space RH condition  
Current status of the OAT  
broadcast function  
OAT Alarm Status  
Normal/Alarm  
Normal/Alarm  
Normal/Alarm  
Airside Linkage Status  
Current linkage status if enabled  
Condenser Water  
Linkage  
Current linkage status if enabled  
SAT  
F
Display SAT  
SAT Offset  
X
X
-9.9 - 10.0  
F
F
F
0
0
0
F
F
F
Used to correct sensor reading  
Leaving Condenser  
Water Temperature  
Displays Leaving Condenser  
Water Temperature  
F
Leaving CW Offset  
-9.9 - 10.0  
Used to correct sensor reading  
Sensor  
Calibration  
Admin Password  
level access only  
Rnet Sensor  
Temperature  
F
Displays SPT  
Rnet Offset  
RH  
X
X
-9.9 - 10.0  
%
Used to correct sensor reading  
Displays Space RH value  
RH Sensor Offset  
-15% - 15%  
0 %  
Used to correct sensor reading  
LEGEND  
BAS — Building Automation System  
DCV — Demand Controlled Ventilation  
IAQ — Indoor Air Quality  
OAT — Outdoor Air Temperature  
RH  
— Relative Humidity  
SAT — Supply Air Temperature  
SPT — Space Temperature  
TPI — Third Party Integration  
43  
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APPENDIX A — WSHP OPEN SCREEN CONFIGURATION (cont)  
PASSWORD  
LEVEL  
SCREEN NAME  
POINT NAME  
EDITABLE  
RANGE  
DEFAULT  
NOTES  
Off, Fan Only,Economize,  
Cooling, Heating, Cont Fan, Test,  
Start Delay, Dehumidify  
Operating Mode  
Displays unit operating mode  
Displays how the fan is configured  
to operate  
Fan Operating Mode  
Occupancy Status  
Auto/Continuous/Always On  
Unoccupied/Occupied  
Displays the current occupancy status  
Always Occupied/Local Schedule/  
BACnet Schedule/BAS Keypad/  
Occupied Contact/Holiday Schedule/  
Override Schedule/Pushbutton  
Override/Unoccupied None  
Displays the origin of the  
occupancy control  
Occupancy Control  
Outside Air  
Displays OAT (Viewable only if OAT  
is a network broadcast)  
F
F
Temperature  
SPT  
Displays SPT  
Normal/Above Limit/Below  
Limit/Sensor Failure  
SPT Status  
Displays the SPT status  
Displays the connection status  
of the Rnet sensor  
SPT Sensor Status  
Condensate Overflow  
Cooling Set Point  
Inactive/Connected  
Normal/Alarm  
Displays the status of the  
condensate overflow  
Displays the actual set point  
being used for cooling control  
F
F
Displays the actual set point  
being used for heating control  
Heating Set Point  
Unit  
Maintenance  
No Password  
required  
Displays the offset values from the Rnet  
user set point adjustment that is being  
applied to the configured set points  
Set Point Adjustment  
F
Auxiliary Heat Control  
Set Point  
Displays the calculated set point being  
used for auxiliary heating control  
F
F
H2O Economizer  
Control Set Point  
Displays the calculated set point being  
used for economizer control  
Calculated IAQ/  
Ventilation Damper  
position  
Displays the ventilation damper  
position calculated by the DCV control  
%
Active Compressor  
Stages  
Displays the actual number of  
compressor stages operating  
0/1/2  
SAT  
F
Displays SAT  
Used to reset the filter alarm timer after  
the filter has been cleaned or replaced  
Reset Filter Alarm  
X
X
No/Yes  
Displays the state of the condensate  
overflow switch contact  
Overflow Contact  
Closed/Open  
Closed/Open  
Displays the state of the external/  
remote occupancy input switch contact  
Occupancy Contact  
Provides capability to force the  
equipment to operate in an  
occupied or unoccupied mode  
Inactive/Occupied/  
Unoccupied  
BAS/Keypad Override  
OAT Input  
Inactive  
Displays if an OAT value is being  
received from the Network  
N/A / Network  
BACnet  
Keypad Configuration  
Password  
X
X
X
X
X
X
See TPI  
Mapping  
Changes password  
See TPI  
System Settings  
Network  
BACnet Time Master  
Clock Set  
See TPI  
Changes clock/time setting  
Override Schedules  
Pushbutton Override  
Inactive/Active Occupied  
Inactive/Active Occupied  
Inactive/Active Occupied/Active  
Unoccupied  
Keypad Override  
Occupancy  
Maintenance  
No Password  
required  
Used to display the active and  
inactive occupancy control inputs  
Schedules  
Occupancy Contact  
BAS on/off  
Inactive/Active Occupied  
Inactive/Active Occupied  
Inactive/Active Occupied  
Local Occupancy  
Schedules  
X
X
X
X
Disable/Enable  
Disable/Enable  
Disable/Enable  
Disable/Enable  
Enable  
Disable  
Disable  
Disable  
Local Holiday  
Schedules  
User/Admin  
Password level  
access  
Used to define which occupancy inputs  
are used to determine  
Schedule  
Configuration  
Local Override  
Schedules  
occupancy mode.  
BACnet Occupancy  
Schedules  
LEGEND  
BAS — Building Automation System  
DCV — Demand Controlled Ventilation  
IAQ — Indoor Air Quality  
OAT — Outdoor Air Temperature  
RH  
— Relative Humidity  
SAT — Supply Air Temperature  
SPT — Space Temperature  
TPI — Third Party Integration  
44  
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APPENDIX A — WSHP OPEN SCREEN CONFIGURATION (cont)  
PASSWORD  
LEVEL  
SCREEN NAME  
POINT NAME  
Occupied Heating  
Occupied Cooling  
Unoccupied Heating  
Unoccupied Cooling  
EDITABLE  
RANGE  
DEFAULT  
NOTES  
Defines the Occupied  
Heating Set Point  
X
X
X
X
X
X
40 - 90  
55 - 99  
40 - 90  
55 - 99  
F
F
F
F
72  
76  
55  
90  
F
F
F
F
Defines the Occupied  
Cooling Set Point  
Defines the Unoccupied  
Heating Set Point  
Defines the Unoccupied  
Cooling Set Point  
Effective Heating  
Set Point  
Takes into effect bias (maximum  
allowable set point deviation)  
0 - 10  
0 - 10  
F
Effective Cooling  
Set Point  
Takes into effect bias (maximum  
allowable set point deviation)  
F
Uses historical data to calculate  
ramp up time so as to be at set point  
at occupied/unoccupied time  
Optimal Start  
Configuration  
Set Points  
Defines the control set point used  
during occupied periods (Viewable  
only if Humidity Sensor = Installed/  
Determines when to start  
User/Admin  
Password level  
access  
Occupied RH  
Set Point  
X
0 - 100%  
65%  
Dehumidification when occupied)  
Defines the control set point used  
during unoccupied periods  
(Viewable only if Humidity Sensor =  
Installed/Determines when to start  
Dehumidification when unoccupied)  
Unoccupied RH  
Set Point  
X
X
0 - 100%  
90%  
Defines the control set point used to  
start increasing ventilation during  
occupied periods (Viewable only if  
Ventilation DMP Type = DCV)  
DCV CTRL Start  
Set Point  
0 - 9999 ppm  
500 ppm  
Defines the control set point  
used to define where the ventilation  
will reach its maximum limit during  
DCV Max CTRL  
Set Point  
X
0 - 9999 ppm  
1050 ppm occupied periods (Viewable only if  
Ventilation DMP Type = DCV/Used  
to determine DCV ending control  
point)  
Defines the start time for an  
Start Time  
End Time  
Mon  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
00:00 - 23:59  
00:00 - 24:00  
No/Yes  
06:00  
occupied period  
Defines the ending time of an  
18:00  
occupied period  
Determines if this day is included  
Yes  
Configuration  
Schedule  
in this schedule  
Determines if this day is included  
Tue  
No/Yes  
Yes  
in this schedule  
User/Admin  
Password level  
access  
Determines if this day is included  
Wed  
No/Yes  
Yes  
in this schedule  
Determines if this day is included  
Thur  
No/Yes  
Yes  
in this schedule  
Determines if this day is included  
Weekly Schedule  
Fri  
No/Yes  
Yes  
in this schedule  
Determines if this day is included  
Sat  
No/Yes  
No  
in this schedule  
Determines if this day is included  
Sun  
No/Yes  
No  
in this schedule  
Defines the start month of this  
Start Month  
Start Day  
Start Time  
End Month  
End Day  
End Time  
0 - 12  
0
hoilday schedule  
Configuration  
Schedule  
Defines the start day of this holiday  
0 - 31  
0
schedule  
Determines the start time for this  
00:00 - 23:59  
0 - 12  
0:00  
User/Admin  
Password level  
access  
schedule  
Defines the month to end this  
0
hoilday schedule  
Defines the day to end this holiday  
0 - 31  
0
Exception  
Schedules 1 - 12  
schedule  
Determines the time to end this  
00:00 - 24:00  
0:00  
schedule  
LEGEND  
BAS — Building Automation System  
DCV — Demand Controlled Ventilation  
IAQ — Indoor Air Quality  
OAT — Outdoor Air Temperature  
RH  
— Relative Humidity  
SAT — Supply Air Temperature  
SPT — Space Temperature  
TPI — Third Party Integration  
45  
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APPENDIX A — WSHP SCREEN OPEN CONFIGURATION (cont)  
PASSWORD  
LEVEL  
SCREEN NAME  
POINT NAME  
EDITABLE  
RANGE  
DEFAULT  
NOTES  
Auto= Intermittant operation during both  
occupied and unoccupied periods/  
Continuous = Intermittant during unoccupied  
periods and continuous during occupied  
periods/Always on = fan operates  
continuously during both occupied and  
unoccupied periods  
Auto/Continuous/  
Always On  
Fan Mode  
X
Continuous  
Defines the delay time before the fan begins  
to operate after heating or cooling is started  
Fan On Delay  
Fan Off Delay  
X
X
0 - 30 sec  
10 sec  
45 sec  
Defines the amount of time the fan will  
continue to operate after heating or  
cooling is stopped  
0 - 180 sec  
Provides capability to manually  
disable heating operation  
Heating Enable  
Cooling Enable  
X
X
X
X
Disable/Enable  
Disable/Enable  
Enable  
Enable  
Provides capability to manually  
disable cooling operation  
Minimum SAT in  
Cooling  
Defines the minimum acceptable operating  
temperature for the Supply Air  
40 - 60  
F
50  
F
Configuration  
Maximum SAT in  
Heating  
Defines the maximum acceptable operating  
temperature for the Supply Air  
80 - 140  
F
110  
F
Admin Password  
level access only  
Normally set to 100% if 2 position damper  
type or set to minimum ventilation position if  
damper type = DCV  
Damper Ventilation  
Position  
X
X
0 - 100%  
100%  
Unit  
Configuration  
DCV Maximum Vent  
Position  
Usually set at 100% - Used to limit maximum  
damper opening in DCV mode  
0 - 100%  
100%  
Filter Alarm Timer  
X
X
0 - 9999 hrs  
0 hrs  
Disables Filter Alarm if set to 0  
Pushbutton Override  
Disable/Enable  
Enable  
Enables Override Feature on Rnet sensor  
SPT Sensor Set Point  
Adjustment  
Enables Set Point adjustment capability  
on Rnet Sensor  
X
Disable/Enable  
Enable  
Cooling is locked out when OAT is less than  
configured value and OAT is actively being  
broadcast  
Lockout Cooling if  
OAT <  
X
-65 - 80  
35 - 150  
F
F
-65  
F
F
Heating is locked out when OAT is greater  
than configured value and OAT is actively  
being broadcast  
Lockout Heating if  
OAT >  
X
150  
Power Fail Restart  
Delay  
X
X
X
0 - 600 sec  
60 sec  
Enable  
Delay before equipment starts  
Occupancy Schedules  
Disable/Enable  
Enables unit occupied  
Used to enforce minimum  
set point separation  
Set Point Separation  
2 - 9  
F
4
F
Used to enable test mode. Will automatically  
reset to disable after 1 hour  
Test Mode  
Fan Test  
X
X
Disable/Enable  
Disable/Enable  
Disable  
Disable  
Used to test all fan speeds. Sequences fan  
from low to high and operates each speed for  
1 minute. Resets to disable on completion  
Off/Low Speed/Medium  
Speed/High Speed/On  
Fan Speed  
Displays current fan operation  
Used to test compressor cooling and heating  
operation. Sequences cooling stage 1, then  
stage 2, then heating stage 2 and reduces  
capacity to stage 1. Operates for 1 minute per  
step. Resets to disable on completion.  
Compressor Test  
X
X
Disable/Enable  
Disable  
Disable  
Used to test dehumification mode -  
Operates for 2 minutes. Resets to  
disable on completion.  
Configuration  
Service  
Dehumidification Test  
Testing Compressor  
Disable/Enable  
Inactive/Heating/Cooling/  
Dehumidify/TimeGard  
Wait  
Admin Password  
level access only  
Displays compressor test mode  
Used to test auxiliary heat.  
Sequences fan on and enables  
heating coil for 1 minute. Resets to  
disable on completion  
Aux Heating Test  
X
X
Disable/Enable  
Disable/Enable  
Disable  
Disable  
Test  
Used to test entering/return air water loop  
economizer coil operation. Sequences fan on  
and opens economizer coil water valve for 1  
minute. Resets to disable on completion  
H2O Economizer Test  
Preposition OA  
Damper  
Used to preposition OA damper  
actuator to set proper preload  
X
X
Disable/Enable  
Disable/Enable  
Disable  
Disable  
Open Vent  
Damper 100%  
Used to test OA damper operation  
Displays SAT  
SAT  
F
F
Displays Leaving Condenser  
Water Temperature  
LCWT  
LEGEND  
BAS — Building Automation System  
DCV — Demand Controlled Ventilation  
IAQ — Indoor Air Quality  
OAT — Outdoor Air Temperature  
RH  
— Relative Humidity  
SAT — Supply Air Temperature  
SPT — Space Temperature  
TPI — Third Party Integration  
46  
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APPENDIX A — WSHP SCREEN OPEN CONFIGURATION (cont)  
PASSWORD  
LEVEL  
SCREEN NAME  
POINT NAME  
EDITABLE  
RANGE  
DEFAULT  
NOTES  
Used to set number of  
fan motor speeds  
# of Fan Speeds  
X
1,2,3  
3
When set to Fan On, G output is  
energized when ever any fan speed  
is active (required for ECM and Fan  
control board). When set to Fan  
Low, output is only energized for  
Low Speed  
G Output Type  
X
Fan On/Fan Low  
Fan On  
Defines the number of  
stages of compression  
Compressor Stages  
Reversing Valve Type  
X
X
X
X
X
X
X
One Stage/Two Stages  
One Stage  
O type  
None  
Determines reversing valve  
signal output type  
O type output/B type output  
Leaving Air Auxiliary  
Heat Type  
None/2-Position HW/1 Stage  
Electric/Modulating HW  
Determines Auxiliary  
Reheat Coil Type  
Entering Air Water  
Economizer Type  
Determines Entering Air  
Economizer Coil Type  
None/2-Position/Modulating  
Normally Closed/Normally Open  
Normally Closed/Normally Open  
None/2-Position/DCV  
None  
2-Position Water  
Valve Type  
Normally  
Closed  
Determines type of 2-position  
water valve used  
Modulating Water  
Valve Type  
Normally  
Closed  
Determines type of modulating  
water valve used  
Ventilation Damper  
Type  
Determines Type of ventilation  
damper control to be used  
None  
0-10 volt  
None  
Used to determine ventilation  
damper output signal range  
(closed - open)  
Damper Actuator Type  
Humidity Sensor  
X
X
X
(0-10 volt)/(2-10 volt)  
None/Installed  
Set to Installed if Humidity  
sensor is present  
Configuration  
Admin Password  
level access only  
Set to Installed if factory-installed  
dehumidification reheat coil  
is present  
Factory Dehumidifica-  
tion Reheat Coil  
None/Installed  
None  
Service  
Configuration  
Occupancy  
Input Logic  
Occupied  
Used to determine external occu-  
X
X
X
Occupied Open/Occupied Closed  
5 - 600 seconds  
CLOSED pancy switch contact occupied state  
Condensate Switch  
Alarm Delay  
Delay before equipment alarms on  
10 sec  
high condensate level  
Condensate Switch  
Alarm State  
Alarm  
CLOSED  
Determine Alarm state of  
condensate switch input  
Alarm OPEN/Alarm CLOSED  
Minimum Condenser  
Water Temperature in  
Heating  
Determines the minimum  
acceptable water loop temperature  
to start heating  
X
X
X
X
25 - 60  
F
60  
90  
60  
95  
F
F
F
F
Maximum Condenser  
Water Temperature in  
Heating  
Determines the maximum  
acceptable water loop temperature  
to start heating  
65 - 100  
F
Minimum Condenser  
Water Temperature in  
Cooling  
Determines the minimum  
acceptable water loop temperature  
to start cooling  
30 - 60  
F
Maximum Condenser  
Water Temperature in  
Cooling  
Determines the maximum  
acceptable water loop temperature  
to start cooling  
85 - 120  
F
IAQ sensor  
Minimum output current (mA)  
for IAQ sensor  
X
X
X
X
0 - 5 ma  
4 ma  
20 ma  
minimum input  
IAQ sensor  
maximum input  
Maximum output current (mA) for  
IAQ sensor  
5 - 20 ma  
IAQ sensor  
minimum output  
Corresponding value in ppm for  
minimum output current  
0 - 9999 ppm  
0 - 9999 ppm  
0 ppm  
IAQ sensor  
maximum output  
Corresponding value in ppm for  
maximum output current  
2000 ppm  
LEGEND  
BAS — Building Automation System  
DCV — Demand Controlled Ventilation  
IAQ — Indoor Air Quality  
OAT — Outdoor Air Temperature  
RH  
— Relative Humidity  
SAT — Supply Air Temperature  
SPT — Space Temperature  
TPI — Third Party Integration  
47  
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APPENDIX A — WSHP SCREEN OPEN CONFIGURATION (cont)  
PASSWORD  
LEVEL  
SCREEN NAME  
POINT NAME  
EDITABLE  
RANGE  
DEFAULT  
NOTES  
Defines the hysteresis applied above  
the cooling and below the heating set  
points before an alarm condition will  
occur  
SPT Occupied Alarm  
Hysteresis  
X
2 - 20  
F
5
F
Used to calculate the delay time before  
an alarm is generated after the alarm  
condition occurs  
SPT Alarm Delay  
X
0 - 30 min per degree  
10 min  
SPT Unoccupied Low  
Alarm Temperature  
Defines the fixed unoccupied  
ow SPT alarm limit  
X
X
X
X
35 - 90  
F
45  
95  
45  
F
F
F
SPT Unoccupied High  
Alarm Temperature  
Defines the fixed unoccupied  
high SPT alarm limit  
45 - 100  
F
SAT Low SAT  
Alarm Limit  
Defines the fixed minimum  
SAT alarm limit  
15 - 90  
F
SAT High SAT  
Alarm Limit  
Defines the fixed maximum  
SAT alarm limit  
90 - 175  
F
120  
F
Defines the delay time before an alarm  
is generated after the alarm condition  
occurs  
Condensate Overflow  
Alarm Delay  
X
X
X
5 - 600 sec  
45% - 100%  
10 sec  
100%  
5 min  
Space Humidity Occupied  
High Alarm Limit  
Defines the fixed occupied  
high space RH alarm limit  
Used to calculate the delay time before  
an alarm is generated after the alarm  
condition occurs  
Space Humidity Alarm  
Delay  
0 - 30 min per % RH  
Configuration  
Space Humidity Unoccu- Admin Password  
Defines the fixed unnoccupied  
high space RH alarm limit  
X
X
45% - 100%  
0 - 9999 ppm  
100%  
pied High Alarm Limit  
level access only  
Alarm  
Configuration  
IAQ/Ventilation Occupied  
High Alarm Limit  
Defines the fixed occupied high  
space IAQ/Ventilation alarm limit  
1100 ppm  
Used to calculate the delay time before  
an alarm is generated after the alarm  
condition occurs  
IAQ/Ventilation  
Alarm Delay  
X
0.1 - 1.0 min per ppm  
0.25 min  
Determines if the SPT alarm is  
Rnet Sensor SPT Alarm  
Rnet Sensor SAT Alarm  
X
X
Ignore/Display  
Ignore/Display  
Ignore  
Ignore  
displayed on the local Rnet sensor  
Determines if the SAT alarm is  
displayed on the local Rnet sensor  
Determines if the Compressor Lockout  
alarm is displayed on the local Rnet  
sensor  
Rnet Sensor Compressor  
Lockout Alarm  
X
X
Ignore/Display  
Ignore/Display  
Display  
Display  
Determines if the Condenser Water  
Temperature alarm is displayed on the  
local Rnet sensor  
Rnet Sensor Condenser  
Water Temperature Alarm  
Determines if the Condensate  
Overflow alarm is displayed on the  
local Rnet sensor  
Rnet Sensor Condensate  
Overflow Alarm  
X
X
X
Ignore/Display  
Ignore/Display  
Ignore/Display  
Display  
Display  
Ignore  
Rnet Sensor Dirty  
Filter Alarm  
Determines if the Dirty Filter alarm is  
displayed on the local Rnet sensor  
Determines if the High Space  
RH alarm is displayed on the  
local Rnet sensor  
Rnet Sensor Space  
High Humidity Alarm  
Loop Control Network  
Number  
See TPI  
See TPI  
See TPI  
Configuration  
Linkage  
Loop Control Network  
Address  
Number of Linked Heat  
Pumps  
LEGEND  
BAS — Building Automation System  
DCV — Demand Controlled Ventilation  
IAQ — Indoor Air Quality  
OAT — Outdoor Air Temperature  
RH  
— Relative Humidity  
SAT — Supply Air Temperature  
SPT — Space Temperature  
TPI — Third Party Integration  
48  
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Copyright 2011 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53500094-01  
Printed in U.S.A.  
Form 50PC-3SI  
Pg 50  
3-11  
Replaces: 50PC-2SI  
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50PCH,PCV  
START-UP CHECKLIST  
CUSTOMER:___________________________  
MODEL NO.:___________________________  
JOB NAME: _______________________________________  
SERIAL NO.:____________________  
DATE:_________  
I. PRE-START-UP  
DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N)  
HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS  
TIGHT? (Y/N)  
HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER?  
(Y/N)  
HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N)  
HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)  
IS AN AIR FILTER INSTALLED? (Y/N)  
II. START-UP  
IS FAN OPERATING WHEN COMPRESSOR OPERATES? (Y/N)  
IF 3-PHASE SCROLL COMPRESSOR IS PRESENT, VERIFY PROPER ROTATION PER INSTRUCTIONS.  
(Y/N)  
UNIT VOLTAGE — COOLING OPERATION  
PHASE AB VOLTS  
PHASE BC VOLTS  
(if 3 phase)  
PHASE CA VOLTS  
(if 3 phase)  
PHASE AB AMPS  
PHASE BC AMPS  
(if 3 phase)  
PHASE CA AMPS  
(if 3 phase)  
CONTROL VOLTAGE  
IS CONTROL VOLTAGE ABOVE 21.6 VOLTS? (Y/N)  
.
IF NOT, CHECK FOR PROPER TRANSFORMER CONNECTION.  
TEMPERATURES  
FILL IN THE ANALYSIS CHART ATTACHED.  
COAXIAL HEAT COOLING CYCLE:  
EXCHANGER  
FLUID IN  
F
F
F
F
FLUID OUT  
FLUID OUT  
AIR OUT  
F
PSI  
PSI  
FLOW  
FLOW  
HEATING CYCLE:  
FLUID IN  
F
F
F
AIR COIL  
COOLING CYCLE:  
AIR IN  
HEATING CYCLE:  
AIR IN  
AIR OUT  
CL-1  
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HEATING CYCLE ANALYSIS  
PSI  
SAT  
F
AIR  
COIL  
SUCTION  
F
F
COMPRESSOR  
DISCHARGE  
EXPANSION  
COAX  
VALVE  
F
LIQUID LINE  
F
F
PSI  
WATER IN  
PSI  
WATER OUT  
LOOK UP PRESSURE DROP IN TABLE 26  
TO DETERMINE FLOW RATE  
COOLING CYCLE ANALYSIS  
PSI  
°F  
SAT  
AIR  
COIL  
SUCTION  
°F  
°F  
COMPRESSOR  
DISCHARGE  
EXPANSION  
COAX  
VALVE  
°F  
LIQUID LINE  
°F  
°F  
PSI  
PSI  
WATER IN  
WATER OUT  
LOOK UP PRESSURE DROP IN TABLE 26  
TO DETERMINE FLOW RATE  
HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION =  
FLOW RATE (GPM) x TEMP. DIFF. (DEG. F) x  
FLUID FACTOR* =  
(Btu/hr)  
SUPERHEAT = SUCTION TEMPERATURE – SUCTION SATURATION TEMPERATURE  
(DEG F)  
=
SUBCOOLING = DISCHARGE SATURATION TEMPERATURE – LIQUID LINE TEMPERATURE  
(DEG F)  
=
*Use 500 for water, 485 for antifreeze.  
97B0038N05  
Copyright 2011 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53500094-01 Printed in U.S.A. Form 50PC-3SI CL-2 5-11A 3-11 Replaces: 50PC-2SI  
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