AQUAZONE™
50PCH,PCV015-060
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 . . . . . . . . . . . . . . . . . . . . . 31
Unit Start-Up with WSHP Open Controls . . . . . . . . 31
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 33
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-37
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Units with Aquazone Complete C Control . . . . . . . 33
Units with Aquazone Deluxe D Control . . . . . . . . . . 33
Units with WSHP Open Multiple Protocol. . . . . . . . 34
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37,38
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
WSHP Open Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 37
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Condenser Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . 39
Checking System Charge . . . . . . . . . . . . . . . . . . . . . 39
Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . . 39
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 39
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
• GOUND 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. . . . . . . . . . . . . . . . . . . . 22
• 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24,25
System Checkout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
PSC Blower Speed Selection . . . . . . . . . . . . . . . . . . 24
IMPORTANT: Read the entire instruction manual before
starting installation.
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . .26,27
Complete C Control Jumper Settings. . . . . . . . . . . 26
Complete C Control DIP Switches. . . . . . . . . . . . . . 26
Deluxe D Control Jumper Settings . . . . . . . . . . . . . 26
Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 26
Deluxe D Control Accessory Relay
Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Water Valve (Slow Opening) . . . . . . . . . . . . . . . . . . . 27
Outside Air Damper (OAD) . . . . . . . . . . . . . . . . . . . . 27
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-33
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 28
Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 28
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. 04-53500049-01 Printed in U.S.A. Form 50PC-1SI Pg 1 7-09 Replaces: New
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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 — 50PCH,PCV Unit Physical Data
50PCH,PCV UNIT
015
018
024
030
036
042
048
060
COMPRESSOR (1 each)
Rotary
Scroll
REFRIGERANT TYPE
Factory Charge (oz)
R-410A
PSC/3
32
43
43
47
50
70
74
82
FAN MOTOR AND BLOWER
Fan Motor Type/Speeds
Fan Motor (hp)
1
/
1
/
1
/
3
/
1
/
3
/
3
/
1
6
6
4
4
2
4
Blower Wheel Size (Dia x W) (in.)
8 x 7
9 x 7
9 x 8
10 x410
11 x 10
1
/
3
/
WATER CONNECTION SIZE IPT (in.)
1
2
4
HORIZONTAL
Air Coil Dimensions (H x W)(in.)
Standard Filter - (Qty) 1 in. Throwaway
16 x 22
(1) 16 x 25
20 x 25
20 x 35
(1) 20 x 28 or
(2) 20 x 14
(1) 20 x 24,
(1) 20 x 14
Weight (lb)
Operating
153
158
158
163
189
194
197
202
203
209
218
224
263
270
303
310
Packaged
Corner Weight (lb)*
Left-Front
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
Right-Back
61
75
VERTICAL
Air Coil Dimensions (H x W)(in.)
Standard Filter - (Qty) 1 in. Throwaway
Weight (lb)
20 x 17.25
(1) 20 x 20
24 x 17.75
(1) 24 x 24
24 x 28.25
(1) 14 x 28, (1) 18 x 24
Operating
Packaged
153
158
158
163
189
194
197
202
203
209
218
224
263
270
278
285
LEGEND
IPT — Internal 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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LEGEND
LEFT RETURN
RIGHT RETURN
BSP — Blower Service Panel
CAP — Control Access Panel
CSP — Compressor Service Panel
IPT — Internal Pipe Thread
OPTIONAL 2 FT
2 FT [610 MM] SERVICE
ACCESS
[610 MM]
SERVICE
ACCESS
2 FT [610 MM] SERVICE
ACCESS
CSP
FRONT
FRONT
OPTIONAL 2 FT
[610 MM]
SERVICE
ACCESS
POWER SUPPLY
3 / 4" [19.1 MM] KNOCKOUT
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]
STRAIGHT
DISCHARGE
1
3
STRAIGHT
DISCHARGE
A
CONDENSATE
3 / 4" IPT
BACK
DISCHARGE
CONDENSATE BACK
NOTE: CHOOSE EITHER
BACK OR STRAIGHT DISCHARGE
FRONT-VIEW
NOTE: CHOOSE EITHER
BACK OR STRAIGHT DISCHARGE
3 / 4" IPT
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
M
O
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]
048-060 54.1 [137.4] 26.2 [66.5] 22.0 [55.9]
BLOWER
OUTLET
V
W
P
a50-8412
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
50PCH015-060 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
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
/
in.
20.1
43.1 17.0 15.1 1.4
109.5 43.2 38.4 3.4
43.1 17.0 15.1 1.4
3.2 1.4
8.1 3.5
4.1 1.4
12.1
30.8
12.1
30.8
12.1
30.8
12.1
30.8
16.1
41.0
16.1
41.0
16.1
41.0
16.1
41.0
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
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
3.7 16.1
9.5 41.0
1.7 18.1
4.4 46.0
9.9
4.1 1.3 23.0
15.0
38.1
15.0
38.1
16.3
41.4
16.3
41.4
19.0
48.3
19.0
48.3
19.0
48.3
19.0
48.3
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
1.1 1.0
2.8 2.5
2
1.3
015
018
024
030
036
042
048
060
cm 51.1
25.1 10.5 3.3 58.4
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
11.0
27.9
11.0
27.9
2
cm 51.1 109.5 43.2 38.4 3.4 10.4 3.5
1.3
3
in.
20.1
43.1 18.3 15.1 1.4
4.4 1.4
/
4
cm 51.1 109.5 46.5 38.4 3.4 11.3 3.5
1.9
3
in.
20.1
43.1 18.3 15.1 1.4
3.1 1.4
7.8 3.5
5.3 1.4
/
4
cm 51.1 109.5 46.5 38.4 3.4
1.9
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
4
1.9
3
in.
20.1
47.1 21.0 15.1 1.4
4.4 1.4
/
4
cm 51.1 119.6 53.3 38.4 3.4 11.3 3.5
1.9
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
in.
1
2.5
1
2.5
13.7
4.1 1.3 35.9
34.8 10.3 3.2 91.2
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
cm 61.2 137.4 53.3 38.4 3.4
34.8 10.3 3.2 91.2
NOTES:
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.
AIRFLOW CONFIGURATION
2. Horizontal units shipped with filter bracket only. This bracket should be
removed for return duct connection.
Code
Return
Left
Discharge
D or S
E or F
A or Z
B or C
Right
Back
Left
3. Discharge flange and hanger brackets are factory installed.
Left
Right
Right
4. Condensate is 3/4-in. (19.1 mm) IPT copper.
5. Blower service panel requires 2 ft (610 mm) service access.
6. Blower service access is through back panel on straight (right or left) dis-
charge units or through panel opposite air coil on back discharge units.
Back
Fig. 1 — 50PCH Unit Dimensions
4
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UNIT HANGER ISOLATION DETAIL
Fig. 2 — Typical Installation — 50PCH Units
5
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LEGEND
P
N
ASP — Alternate Service Panel
BSP — Blower Service Panel
CAP — Control Access Panel
CSP — Compressor Service Panel
HV — High Voltage
IPT — Internal Pipe Thread
LV — Low Voltage
ACCESS PANELS
FIELD INSTALLED
DISCHARGE FLANGE
STANDARD FILTER BRACKET
O
Q
a50-8413
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
G
C
C
CONDENSATE
3/4" IPT
POWER SUPPLY
3/4" [19.1 MM] HV
KNOCKOUT
LOW VOLTAGE
1/2" [12.7 MM] LV
KNOCKOUT
2
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
50PCV015-060 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
39.0 1.9 1.4 13.8 1.4
99.1 4.8 3.6 35.1 3.6 20.6
1
in.
21.5
cm 54.6
21.5
54.6
8.1
1.4
3.6
/
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
18.3
46.5
20.9
53.1
0.7
1.9
1.23
13.6 5.8
015
018
024
030
036
042
048
060
1
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
1.4
3.6
/
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
18.3
46.5
20.9
53.1
0.7
1.9
99.1 4.8 3.6 32.8 3.6 20.6
1.23
13.6 5.8
3
21.5
54.6
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
/
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
18.3
46.5
20.9
53.1
0.7
1.9
1.49
13.6 5.8
3
21.5
54.6
1.4
3.6
/
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
18.3
46.5
20.9
53.1
0.7
1.9
1.49
13.6 5.8
3
26.0
66.0
1.4
3.6
/
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
22.8
57.9
23.9
60.7
0.7
1.9
1.49
13.1 5.8
3
26.0
66.0
1.4
3.6
/
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
22.8
57.9
23.9
60.7
0.7
1.9
1.49
13.1 5.8
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
29.3
74.4
22.5
57.0
0.7
1.9
13.1 5.8
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
29.3
74.4
22.5
57.0
0.7
1.9
13.1 5.8
NOTES:
AIRFLOW CONFIGURATION
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.
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 and 041 sizes with front return).
Code
F or H
L or M
G or R
Return
Front
Left
Discharge
Top
Top
Top
3. Discharge flange is field installed.
Right
4. Condensate is 3/4 in. (19.1 mm) IPT.
Fig. 3 — 50PCV Unit Dimensions
6
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Supply Air
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.
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
Low Pressure
Drop Water
Control Valve
(optional)
(field-installed
accessory)
Connection End
Power
Thermostat
Wiring
Return Air
Ball Valve with optional
integral P/T plug
(typical for supply and
return piping)
Compressor
Access Panel
NOTE: Ball valve with integral pressure temperature plug recommended.
Fig. 4 — Typical Vertical Installation —
50PCV Units
Side Discharge
Water
Connection End
Rotate
Step 3 — Locate Unit — The following guidelines
should be considered when choosing a location for a WSHP:
Return Air
• 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.
• Locate unit in an area that allows easy access and
removal of filter and access panels.
Move to Side
• Allow enough space for service personnel to perform
maintenance.
Replace Screws
Water
Connection End
• Return air must be able to freely enter the space if unit
needs to be installed in a confined area such as a closet.
Return Air
• Install the unit on a piece of rubber, neoprene or other
mounting pad material for sound isolation. The pad
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.
Drain
• 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.
Discharge Air
Back Discharge
Fig. 5 — Conversion Left Return,
Side Discharge to Back Discharge
• Provide access for fan and fan motor maintenance and
for servicing the compressor and coils without removing
the unit.
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.
• In limited side access installations, pre-removal of the
control box side mounting screws will allow control box
removal for future servicing.
Supply
Duct
Side Discharge
Water
• Provide access to water valves and fittings and screw-
driver access to the unit side panels, discharge collar and
all electrical connections.
Connection End
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.
Back Discharge
Discharge Air
FIELD CONVERSION OF DISCHARGE AIR — The dis-
charge air of the 50PCH horizontal units can be converted
between side and back discharge in the field. The conversion
Fig. 6 — Conversion Right Return,
Side Discharge to Back Discharge
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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
Pitch Toward
Drain
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. See Fig. 11.
Fig. 8 — 50PCV Units Mounted with
Vibration Absorption Pad
8
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• 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.
In addition to complying with any applicable codes, consid-
er the following for system piping:
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.
• 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.
Fig. 10 — Trap Condensate Drain
3/4” Copper FPT/PVC
3/4” PVC
Vent
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.
• Do not use galvanized or steel fittings at any time due to
NOTE: Unit does not need to be sloped toward drain.
corrosion.
Fig. 11 — Vertical Condensate Connection
• 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.
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:
• 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.
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.
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
HOSE DIAMETER (in.)
MINIMUM BEND RADII (in.)
1
/
21/2
2
• Use a backup wrench when making screw connections to
3
/
4
4
unit to prevent internal damage to piping.
1
51/2
• 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.
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. 13-22 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 threaded
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. 23. 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
7
% Voltage Imbalance = 100 x
457
Step 8 — Wire Field Power Supply
WARNING
= 1.53%
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.
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.
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.
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.
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.
10
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11
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12
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13
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14
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15
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A50-8355
16
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A50-8354
17
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A50-8356
18
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A50-8353
19
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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
2
2
G n d
n e R t +
R n e
+ 1 2
N
E E G R
W H I T E
- t
B L A C K
R E D
V
To WSHP Controller
Rnet Terminals (J13)
20
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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
Max Fuse/ Fan Motor Total Unit
Max Fuse/
HACR
UNIT SIZE
CODE
QTY RLA LRA
MCA
MCA
FLA
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
7.0
HACR
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
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
FLA
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
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
208/230-3-60 197/254
460-3-60 414/506
208/230-1-60 197/254
265-1-60 239/292
208/230-3-60 197/254
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
6.0
5.4
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
8.5
7.6
7.0
6.3
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
015
6.3
7.2
8.2
10.0
8.2
8.7
018
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
024
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
460-3-60
208/230-1-60
208/230-3-60
460-3-60
414/506
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
17.9 112.0
20.9
16.5
7.7
25.4
19.9
9.2
20.9
16.5
7.7
13.5
6.0
88.0
44.0
34.0
575-3-60
4.9
6.3
7.5
6.3
208/230-1-60
208/230-3-60
460-3-60
21.8 117.0
25.2
17.1
8.0
30.7
20.5
9.6
26.7
18.6
8.7
13.7
6.2
83.1
41.0
33.0
575-3-60
4.8
6.2
7.4
6.7
208/230-1-60
208/230-3-60
460-3-60
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
7.8
5.8
52.0
38.9
575-3-60
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
MCA
RLA
Heating, Air Conditioning and Refrigeration
Locked Rotor Amps
NOTES:
1. HACR circuit breaker in U.S.A. only.
2. All fuses
Minimum Circuit Amps
Rated Load Amps
3. Class RK-5.
a50-8162
Fig. 23 — Typical Single-Phase Line Voltage Power Connection
21
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Step 9 — Wire Field Controls
TERMINAL STRIP P2
C
THERMOSTAT CONNECTIONS — The thermostat
should be wired directly to the Aquazone™ control board. See
Fig. 13-22, and 24.
CAPACITOR
COMPLETE C CONTROL
TYPICAL
WATER
VALVE
COMPRESSOR CONTACTOR
24 VAC
LINE
A D
A
L O
J1
Fig. 26 — 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 26 shows typical wiring for a 24-vac external
solenoid valve. Figures 27 and 28 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
(only on valves with end switches). Only relay or triac based
electronic 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. 24 — 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. 25.
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.tif
THERMOSTAT
Fig. 25 — Typical Aquazone Control Board
Jumper Locations (Complete C Control Shown)
Fig. 27 — 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. 26. 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. 28 — Taco SBV Valve Wiring
22
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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
1. Partially cut , then bend and pull off the outer jacket of
the Rnet cable(s), being careful not to nick the inner
insulation.
2. Strip about 1/4 in. of the inner insulation from each wire.
See Fig. 29.
user interface.
For specific details about sensors, refer to the literature sup-
plied with the sensor.
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.
a50-8443
Wire SPT sensors to the WSHP Open controller’s Rnet port.
An Rnetbus can consist of any of the following combinations
of devices wired in a daisy-chain configuration:
.25 IN.
INNER INSULATION
Fig. 29 — Rnet Cable Wire
• 1 SPT Plus, SPT Pro, or SPT Pro Plus sensors
• 1 to 4 SPT Standard sensors
3. Wire each terminal on the sensor to the same terminal on
the controller. See Fig. 18-22. Table 7 shows the recom-
mended Rnet wiring scheme.
• 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.
23
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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. 18-22.
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 — All water source heat pumps are
factory set to deliver rated airflow at nominal static (0.15 in.
wg) on medium speed. Where higher static is needed, high
speed can be utilized (0.4 to 0.5 in. wg). Low speed will
deliver approximately 85% of rated airflow (0.10 in. wg). The
PSC blower fan speed can be changed on all units by swapping
wires connected to the relay contacts that control the fan. See
Fig. 30.
To wire the IAQ sensor to the controller:
1. Wire the sensor to the controller. See Fig. 18-22.
CONNECT THE BLUE WIRE TO:
H FOR HIGH SPEED FAN
M FOR MEDIUM SPEED FAN
L FOR LOW SPEED FAN
1
2. Install a field-supplied 250-ohm, /4 watt, 2% tolerance
resistor across the controller’s RH/IAQ and Gnd
terminals.
BLU
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.
MEDIUM FACTORY SETTING
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 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.
M
L
H
FAN MOTOR
Fig. 30 — 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. 30. 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 approximately 85% of rated
airflow at 0.10 in. wg. An optional ‘high static’ blower is avail-
able by using the special option code in the model
nomenclature.
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.
PRE-START-UP
NOTE: Blower performance is shown in Tables 8-11.
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.
24
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Table 8 — 50PCV Blower Performance with Hot
Water Reheat (HWR) Option
Table 9 — 50PCV Blower Performance with
Wet Coil
REHEAT EXTERNAL STATIC PRESSURE (ESP) LOSS
COIL FACE VELOCITY
(fpm)
WET COIL REDUCTION
(in. wg)
COIL FACE
VELOCITY (fpm)
015-030
(in. wg)
036, 042
(in. wg)
048, 060
(in. wg)
200
250
300
350
400
450
500
0.030
0.055
0.080
0.100
0.120
0.140
0.160
200
250
300
350
400
450
500
0.060
0.070
0.090
0.124
0.164
0.252
0.380
0.049
0.055
0.068
0.091
0.129
0.221
0.350
0.038
0.040
0.045
0.059
0.094
0.189
0.320
NOTE: For 50PCV units with HWR, calculate coil face velocity of the entering
air. Find the external static pressure loss for the reheat application. This loss
includes the wet coil loss.
Table 10 — 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
745
666
588
745
666
588
725
657
578
725
657
578
706
647
568
706
647
568
696
637
559
696
637
559
686
617
549
686
617
549
666
608
529
666
608
529
637
588
510
637
588
510
950
836
694
588
549
480
588
549
480
922
817
684
539
510
451
539
510
451
884
789
665
451
015
018
024
030
036
042
048
060
Med
Low
525
600
375
450
600
750
900
686
608
676
598
Hi
Med
Low
Hi
Med
Low
Hi
Med
Low
Hi
Med
Low
Hi
Med
Low
Hi
Med
Low
Hi
Med
Low
451
686
608
676
598
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
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 11 — 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.
25
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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-second de-
lay before energizing during stage 2 demand.
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.
NOTE: If DIP switch is set for stage 2, the alarm relay will not
cycle during Test mode.
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.
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.
NOTE: The alarm relay will not cycle during Test mode if
switch is set to OFF, stage 2.
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.
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.
Switch 6 — Not used.
Boilerless Operation — Switch 7 provides selection of boiler-
less 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.
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.
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.
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 12 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 13 for DIP switch
combinations.
26
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Table 12 — 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 13 — 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 14 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 14.
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.
27
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Table 14 — 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.
50PCH,PCV
AIR LIMITS
Cooling (F)
45
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
39
68
85
40
68
80
80.6
110
50
80.6/66.2
110/83
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
30
50-110
120
20
30-70
90
Normal Entering Water
Max. Entering Water
Normal Water Flow
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 15. 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 16-22. If temperature is within
range, proceed. If temperature is outside the range, check
the cooling refrigerant pressures in Tables 16-22.
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 15 — 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
Table 16 — 50PC015,018 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
120-130
120-130
120-130
155-175
142-162
128-148
27-32
27-32
27-32
11-16 16.9-19.9
9-14 12.5-14.5
16-22
17-23
17-23
73- 83
75- 85
78- 88
268-288
270-290
272-292
8-13
8-13
8-13
4- 9
4- 9
4- 9
6.1- 8.1
4.4- 6.4
2.9- 4.9
15-21
16-22
16-22
30
50
9-14
8.1-10.1
1.5
2.25
3
137-147
137-147
137-147
220-240
206-226
192-212
16-21
16-21
16-21
10-15 17.0-19.0
8-13 12.6-14.6
16-22
17-23
17-23
102-112
106-116
110-120
295-315
297-317
299-319
8-13
8-13
8-13
8-13
8-13
8-13
9.1-11.1
6.9- 8.9
4.7- 6.7
20-26
21-27
21-27
8-13
8.4-10.4
1.5
2.25
3
142-152
142-152
142-152
287-307
273-239
259-279
7-12
7-12
7-12
10-15 15.9-17.9
8-13 11.8-13.8
16-22
17-23
17-23
131-141
137-147
144-154
324-344
326-346
328-348
9-14
9-14
9-14
10-15 12.1-14.1
25-33
26-34
26-34
10-15
10-15
9.3-11.3
6.6- 8.6
70
8-13
7.8- 9.8
1.5
2.25
3
146-156
146-156
146-156
375-395
361-381
347-367
6-11
6-11
6-11
10-15 14.9-16.9
8-13 11.0-13.0
16-22
17-23
17-23
174-184
180-190
187-197
360-380
367-387
374-394
10-15
11-16
12-17
12-17 15.8-17.8
12-17 11.9-13.9
32-40
33-41
33-41
90
8-13
7.2- 9.2
12-17
8.0-10.0
1.5
2.25
3
154-164
154-164
154-164
478-498
461-481
445-465
6-11
6-11
6-11
10-15 14.0-16.0
8-13 10.2-12.2
16-22
16-22
16-22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
8-13
6.5- 8.5
LEGEND
DB
—
—
—
Dry Bulb
No Heating Operation in This Temperature Range
28
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Table 17 — 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
115-125
115-125
115-125
154-174
141-161
127-147
40-45
40-45
40-45
8-13
6-11
6-11
16.5-18.5
12.1-14.1
77.7- 9.7
19-25
20-26
20-26
73- 83
75- 85
78- 88
283-303
285-305
287-307
8-12
8-12
8-12
6-11
6-11
6-11
5.9- 7.9
4.2- 6.2
2.7- 4.7
16-22
17-23
18-24
30
50
1.5
2.25
3
115-120
115-120
115-120
209-229
195-215
181-201
24-29
24-29
24-29
10-15
8-13
8-13
15.7-17.7
11.6-13.6
7.6- 9.6
18-24
18-24
18-24
102-112
106-116
110-120
313-333
314-334
316-336
8-12
8-12
8-12
8-13
8-13
8-13
8.9-10.9
6.7- 8.7
4.5- 6.5
22-28
23-29
23-29
1.5
2.25
3
136-146
136-146
136-146
275-295
261-281
247-267
6-11
6-11
6-11
6-11
5-10
4- 9
15.7-17.7
11.6-13.6
7.6- 9.6
18-24
18-24
18-24
128-138
134-144
141-151
340-360
342-362
344-364
9-14
9-14
9-14
9-14
9-14
9-14
11.3-13.3
8.5-10.5
5.8- 7.8
27-34
28-35
28-35
70
1.5
2.25
3
140-150
140-150
140-150
361-381
347-367
333-353
6-11
6-11
6-11
6-11
5-10
4- 9
14.9-16.9
11.0-13.0
7.2- 9.2
18-24
18-24
18-24
162-172
166-176
171-181
370-390
376-396
383-403
14-19
15-20
16-21
9-14
9-14
9-14
14.4-16.4
10.8-12.8
7.1- 9.1
32-40
34-42
34-42
90
1.5
2.25
3
144-154
144-154
144-154
460-480
445-465
428-448
6-11
6-11
6-11
6-11
4- 9
4- 9
13.9-15.9
10.2-12.2
6.5- 8.5
17-23
17-23
17-23
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
—
—
—
Dry Bulb
No Heating Operation in This Temperature Range
Table 18 — 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
116-126
115-125
115-125
146-166
138-158
128-148
27-32
27-32
27-32
7-13
6-11
6-11
19.6-21.6
14.3-16.3
8.0-10.0
16-22
17-23
17-23
69- 79
73- 83
76- 86
275-295
277-297
279-299
7-12
7-12
7-12
6-11
6-11
6-11
7.2- 9.2
5.4- 7.4
3.5- 5.5
16-22
17-23
17-23
30
50
1.5
2.25
3
129-139
128-138
128-138
217-237
203-223
189-209
12-17
12-17
12-17
6-11
5-10
5-10
20.8-22.8
15.0-17.0
9.2-11.2
17-23
18-24
18-24
96-106
100-110
105-115
300-320
304-324
309-329
10-15
10-15
10-15
9-14
9-14
9-14
10.5-12.5
7.6- 9.6
4.8- 6.8
21-27
22-28
22-28
1.5
2.25
3
132-142
131-141
131-141
293-313
274-294
256-276
9-14
9-14
9-14
6-11
5-10
5-10
20.1-22.1
14.4-16.4
8.6-10.6
17-23
18-24
18-24
123-133
129-139
135-145
327-347
333-353
339-359
11-16
11-16
11-16
11-16
11-16
11-16
13.2-15.2
9.8-11.8
6.4- 8.4
25-32
26-33
27-34
70
1.5
2.25
3
137-147
137-147
137-147
383-403
362-382
342-362
7-12
7-12
7-12
5-10
5-10
5-10
19.4-21.4
13.8-15.8
8.2-10.2
16-22
16-22
16-22
155-165
162-172
169-179
355-375
362-382
369-389
13-18
14-19
16-21
11-16
11-16
11-16
16.8-18.8
12.7-14.7
8.6-10.6
30-38
31-39
32-40
90
1.5
2.25
3
143-153
143-153
143-153
475-495
457-477
439-459
6-11
6-11
6-11
9-14
6-11
6-11
18.2-20.2
13.0-14.0
7.7- 9.7
16-22
16-22
16-22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
—
—
—
Dry Bulb
No Heating Operation in This Temperature Range
Table 19 — 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
117-127
116-126
116-126
142-162
134-154
124-144
33-38
33-38
33-38
8-14
7-12
7-12
19.1-21.1
13.8-15.8
7.4- 9.4
15-22
15-22
15-22
69- 79
73- 83
76- 86
276-296
278-298
280-300
10-15
10-15
10-15
10-15
10-15
10-15
7.2- 9.2
5.3- 7.3
3.5- 5.5
17-23
18-24
18-24
30
50
1.5
2.25
3
136-146
136-146
136-146
211-231
197-217
183-203
11-16
11-16
11-16
6-11
5-10
5-10
20.6-22.6
14.8-16.8
9.0-11.0
17-23
17-23
17-23
99-109
103-113
108-118
302-322
306-326
311-331
10-15
10-15
10-15
13-18
13-18
13-18
10.6-12.6
7.7- 9.7
5.0- 7.0
22-28
23-29
23-29
1.5
2.25
3
137-147
137-147
137-147
275-295
260-280
245-265
9-14
9-14
9-14
10-15
9-14
9-14
19.0-21.0
13.8-15.8
8.0-10.0
18-24
19-25
19-25
127-137
133-143
139-149
332-352
338-358
344-364
10-15
10-15
10-15
15-20
15-20
15-20
13.5-15.5
10.1-12.1
6.7- 8.7
27-34
28-35
29-36
70
1.5
2.25
3
142-152
142-152
142-152
373-393
352-372
332-352
7-12
8-13
8-13
10-15
6-11
6-11
19.5-21.5
13.9-15.9
8.3-10.3
17-23
17-23
17-23
164-174
172-182
181-191
365-385
372-392
379-399
11-16
11-16
12-17
15-20
15-20
15-20
17.4-19.4
13.2-15.2
9.0-11.0
34-42
35-43
36-44
90
1.5
2.25
3
147-157
147-157
147-157
467-487
448-468
430-450
6-11
6-11
6-11
10-15
8-13
7-12
16.2-18.2
11.9-13.9
7.6- 9.6
16-22
16-22
16-22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
—
—
—
Dry Bulb
No Heating Operation in This Temperature Range
29
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Table 20 — 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
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
114-124
113-123
113-123
170-190
150-170
131-151
27-32
27-32
27-32
10-15 17.2-19.2
9-14 12.7-14.7
17-23
17-23
17-23
69- 79
72- 82
75- 85
286-306
289-309
292-312
5-10
5-10
6-11
5-10
6-11
6-11
4.5- 6.5
3.9- 5.9
3.2- 5.2
16-22
17-23
18-24
30
50
7-12
8.2-10.2
1.5
2.25
3
130-140
129-139
129-139
226-246
208-228
190-210
10-15
10-15
10-15
6-11 17.8-19.8
5-10 13.3-15.3
20-26
20-26
20-26
100-110
105-115
110-120
315-335
322-342
330-350
7-12
8-13
10-15
6-11
6-11
7-12
9.0-11.0
7.0- 9.0
5.0- 7.0
22-28
23-29
24-30
4- 9
8.8-10.8
1.5
2.25
3
132-142
131-141
131-141
290-310
273-293
255-275
6-11
6-11
6-11
6-11 17.3-19.3
5-10 12.8-14.8
19-25
19-25
19-25
131-141
138-148
145-155
347-367
358-378
369-389
11-16
13-18
16-21
6-11 13.4-15.4
8-13 10.0-12.0
29-35
30-36
31-37
70
4- 9
8.3-10.3
9-14
6.9- 8.9
1.5
2.25
3
136-146
135-145
135-145
370-390
350-370
330-350
6-11
6-11
6-11
6-11 16.0-18.0
5-10 11.8-13.8
17-23
17-23
17-23
175-185
177-187
180-190
393-413
401-421
409-429
19-24
20-25
22-27
7-12 17.6-19.6
9-14 13.2-15.2
36-42
37-43
38-44
90
4- 9
7.6- 9.6
12-17
8.7-10.7
1.5
2.25
3
143-153
142-152
141-151
469-489
448-468
427-447
6-11
6-11
6-11
6-11 14.0-16.0
5-10 11.0-13.0
16-22
16-22
16-22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
4- 9
7.0- 9.0
LEGEND
DB
—
—
—
Dry Bulb
No Heating Operation in This Temperature Range
Table 21 — 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
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
108-118
107-117
107-117
180-200
161-181
142-162
27-32
28-33
29-34
12-17
10-15
9-14
19.8-21.8
14.8-16.8
9.8-11.8
19-25
19-25
19-25
65- 75
68- 78
72- 82
293-313
297-217
301-321
7-12
8-13
9-14
9-14
9-14
9-14
8.2-10.2
6.2- 8.2
4.2- 6.2
17-23
18-24
19-25
30
50
1.5
2.25
3
123-133
122-132
122-132
236-256
218-238
200-220
16-21
17-22
17-22
8-13
7-12
6-11
20.2-22.2
15.2-18.2
10.2-12.2
21-27
21-27
21-27
92-102
100-110
108-118
321-341
330-350
340-360
10-15
11-16
12-17
11-16
11-16
11-16
11.6-13.6
8.9-10.9
6.0- 8.0
23-29
24-30
26-32
1.5
2.25
3
130-140
129-139
129-139
305-325
285-305
265-285
10-15
11-16
11-16
8-13
6-11
5-10
20.0-22.0
15.0-17.0
10.0-12.0
20-26
20-26
20-26
122-132
133-143
144-154
353-373
365-385
378-398
12-17
14-19
16-21
11-16
11-16
11-16
15.0-17.0
11.5-13.5
8.0-10.0
29-35
31-37
33-39
70
1.5
2.25
3
133-143
132-142
132-142
390-410
368-388
345-365
8-13
9-14
9-14
8-13
6-11
5-10
19.0-21.0
14.0-16.0
9.0-11.0
19-25
19-25
19-25
166-176
173-183
181-191
397-417
407-727
417-437
16-21
18-23
19-24
9-14
9-14
10-15
19.5-21.5
14.7-16.7
9.9-11.9
37-43
38-44
40-46
90
1.5
2.25
3
141-151
140-150
140-150
497-517
472-492
447-467
6-11
7-12
8-13
8-13
6-11
5-10
18.0-20.0
13.5-15.5
8.7-10.7
18-24
18-24
18-24
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
—
—
—
Dry Bulb
No Heating Operation in This Temperature Range
Table 22 — 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
98-108
97-107
96-106
160-180
149-169
137-157
40-45
41-46
42-48
12-17 20.0-22.0
12-17 14.3-16.3
19-25
19-25
20-26
62- 72
66- 76
70- 80
276-296
280-300
284-304
6-11
6-11
7-12
6-11
6-11
6-11
8.0-10.0
6.0- 8.0
4.0- 6.0
17-23
18-24
19-25
30
50
11-16
8.5-10.5
1.5
2.25
3
118-128
117-127
115-125
225-245
210-230
195-215
36-41
37-42
38-43
11-16 21.2-23.2
10-15 15.7-17.7
9-14 10.2-12.2
19-25
20-26
21-27
88- 98
94-104
100-110
306-326
311-331
317-337
10-15
10-15
11-16
8-13 11.0-13.0
8-13
9-14
23-29
24-30
25-31
8.3-10.3
5.5- 7.5
1.5
2.25
3
135-145
133-143
132-142
300-320
285-305
270-290
12-17
14-19
16-21
9-14 20.3-22.3
8-13 15.0-17.0
7-12 10.0-12.0
21-27
21-27
22-28
112-122
122-132
130-140
333-353
342-362
351-371
12-17
14-19
15-20
10-15 14.0-16.0
10-15 10.5-12.5
28-34
30-36
32-38
70
11-16
7.3- 9.3
1.5
2.25
3
139-149
138-148
138-148
390-410
370-390
350-370
8-13
8-13
8-13
7-12 19.3-21.3
6-11 14.3-16.3
20-26
21-27
21-27
147-157
154-164
160-170
369-389
377-397
385-405
15-20
18-23
19-24
10-15 17.7-19.7
10-15 13.4-15.4
36-42
37-43
38-44
90
6-11
9.3-11.3
11-16
9.0-11.0
1.5
2.25
3
144-154
143-153
142-152
488-508
468-488
448-468
8-13
7-12
7-12
8-13 18.4-20.4
6-11 13.6-15.6
21-27
21-27
21-27
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
5-10
8.8-10.8
LEGEND
DB
—
—
—
Dry Bulb
No Heating Operation in This Temperature Range
30
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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.
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 16-22. If temperature is within
range, proceed. If temperature is outside the range, check
the heating refrigerant pressures in Tables 16-22.
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.
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.
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.
5. Once the unit has begun to run, check for warm air deliv-
ery at the unit grille.
c. Scroll to day, month and year using arrow keys.
Use number keypad to set date.
5. To set Daylight Savings Time (DST):
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.
7. Check for vibration, noise and water leaks.
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.
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. 31.
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.
c. Use number keys to select the day of month and
year.
d. Push the OK softkey to finalize the data.
6. To view configuration settings:
a. Select the Config softkey.
b. Select the Service Config softkey. Scroll through
the factory settings by using the up and down
arrow keys. See below for factory settings.
Only the following settings will need to be
checked.
• # 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."
To start-up a unit with WSHP Open controls:
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.
a50-8444
Fig. 31 — BACview6 Display Interface
*Sponsored by ASHRAE (American Society of Heating, Refrigerat-
ing and Air Conditioning Engineers).
31
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• The condenser water limit needs to be verified
depending on design parameters and application,
whether geothermal or boiler/tower.
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.
7. To view unit configuration settings:
a. Select the 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
• 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
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.
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.
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.
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.
To add exceptions to the schedule:
i. Press Add softkey.
ii. Select exception type from following:
• Date
• Date Range
• Week-N-Day
• Calender Reference
9. Go back to Home Screen.
10. Remove BACview6 cable from SPT sensor by reversing
the process in Step 1.
11. Perform system test.
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
the unit by checking pressure drop across the heat exchanger.
Compare the results to the data in Table 23.
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 23. 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 23 — Coaxial Water Pressure Drop
PRESSURE DROP, psi (kPa)
50PC
UNIT
SIZE
gpm
L/s
30 F
(-1 C)
50 F
70 F
(21 C)
90 F
(32 C)
(10 C)
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
0.12
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
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)
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.
0.95 12.6 (86.8) 11.1 (76.8) 10.3 (71.0) 9.6 (66.1)
32
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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).
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.
IMPORTANT: All alcohols should be pre-mixed and
pumped from a reservoir outside of the building or
introduced under water level to prevent fuming.
Calculate the total volume of fluid in the piping system. See
Table 24. Use the percentage by volume in Table 25 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.
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.
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.
Table 24 — 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
Units with Aquazone™ Deluxe D Control
LEGEND
IPS
SCH
SDR
—
—
—
Internal Pipe Size
Schedule
Standard Dimensional Ratio
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.
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.
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.
NOTE: Volume of heat exchanger is approximately 1.0 gallon.
Table 25 — Antifreeze Percentages by Volume
MINIMUM TEMPERATURE FOR FREEZE
PROTECTION (F)
ANTIFREEZE
Methanol (%)
100% USP Food Grade
Propylene Glycol (%)
10
15
20
25
25
21
16
10
38
29
30
25
22
20
15
14
Ethanol (%)
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
the water loop. If an open type cooling tower is used continu-
ously, chemical treatment and filtering will be necessary.
OPERATION
Power Up Mode — The unit will not operate until all the
inputs, terminals and safety controls are checked for normal
operation.
NOTE: The compressor will have a 5-minute anti-short cycle
upon power up.
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
33
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Speed relays are turned off after a 60-second delay. The control
reverts to Standby mode.
schedule_schedule. From here, enter either a Weekly or Excep-
tion schedule for the unit.
Output EH1, EH2, Fan Enable, and Fan Speed will be ON if
the G input is not active during Emergency Heat mode.
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.
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.
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:
• 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.
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
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:
• 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
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
• Cooling is set to Enable.
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• 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.
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.
• 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.
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.
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.
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 5F 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
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.
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:
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.
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 config-
urable). 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.
• 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
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
35
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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.
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:
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.
Heating — Additionally, the control will modulate the water
valve should the entering water loop temperature be suitable
for heating (at least 5F 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 5F 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.
Heating — Additionally, the economizer control will open the
water valve should the entering water loop temperature be suit-
able for heating (at least 5F above space temperature) and
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
• Damper control is configured for DCV.
• The unit is in an occupied mode.
• 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:
• 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 5F 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,
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operate if the loop pump status is off and therefore the WSHP
compressor will not run.
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 28.
COMPLETE C AND DELUXE D BOARD
SYSTEM TEST
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.
Table 26 — Complete C Control Current LED
Status and Alarm Relay Operations
LED STATUS
DESCRIPTION OF OPERATION
ALARM RELAY
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 26-28. 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.
Normal Mode
Open
Cycle (closed 5
sec., Open 25 sec.)
On
Normal Mode with PM Warning
Complete C Control is
non-functional
Off
Open
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
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
stage 2 followed by heating stage 2 then reduces capacity to
heating stage 1. Operates for 1 minute per step.
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.
OPEN VENT DAMPER 100% TEST — Tests outside air
(OA) damper operation.
PREPOSITION OA DAMPER — Prepositions OA damper
actuator to set proper preload.
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
NOTES:
1. Slow flash is 1 flash every 2 seconds.
2. Fast flash is 2 flashes every 1 second.
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.
Table 27 — Complete C Control LED Code and
Fault Descriptions
LED
CODE
1
FAULT
DESCRIPTION
No fault in memory
There has been no fault since
the last power-down to power-
up sequence
2
3
High-Pressure Switch
Low-Pressure Switch
HP open instantly
LP open for 30 continuous
seconds before or during a
call (bypassed for first 60 sec-
onds)
4
5
6
Freeze Protection
Coax — FP1
FP1 below Temp limit for 30
continuous seconds
(bypassed for first 60 seconds
of operation)
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.
Freeze Protection Air Coil
— FP2
FP2 below Temp limit for 30
continuous seconds
(bypassed for first 60 seconds
of operation)
Condensate overflow
Sense overflow (grounded)
for 30 continuous seconds
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.
7 (Autoreset) Over/Under Voltage
"R" power supply is <19VAC
or >30VAC
Shutdown
8
9
PM Warning
Performance Monitor Warning
has occurred.
FP1 and FP2
Thermistors are swapped
FP1 temperature is higher
than FP2 in heating/test
mode, or FP2 temperature is
higher than FP1 in cooling/
test mode.
LEGEND
FP
—
—
—
Freeze Protection
LP
PM
—
—
Low Pressure
Performance Monitor
HP
High Pressure
LED
Light-Emitting Diode
Aquazone™ Deluxe D Control LED Indica-
tors — There are 3 LED indicators on the Deluxe D control:
STATUS LED — Status LED indicates the current status or
mode of the Deluxe D control. The Status LED light is green.
37
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Table 28 — 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.
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: 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: 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.
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: 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.
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 16-22. If the unit is not
within these ranges, recover and reweigh in refrigerant charge.
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.
IMPORTANT: To prevent injury or death due to electrical
shock or contact with moving parts, open unit disconnect
switch before servicing unit.
Compressor — Conduct annual amperage checks to en-
sure that amp draw is no more than 10% greater than indicated
on the serial plate data.
Filters — Filters must be clean for maximum performance.
Inspect filters every month under normal operating conditions.
Replace when necessary.
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.
IMPORTANT: Units should never be operated with-
out a filter.
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. Closed-loop
systems must have a minimum of 15 psig during the summer
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.
Air Coil Cleaning — Remove dirt and debris from evap-
orator coil as required by condition of the coil. A 10% solution
38
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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.
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.
GAS VENT
PUMP
PRIMING
CONN.
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.
GLOBE
VALVES
SUCTION
SUPPLY
1” PIPE
PUMP
SUPPORT
CONDENSER
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.
TANK
REMOVE WATER
REGULATING VALVE
RETURN
FINE MESH
SCREEN
CAUTION
Follow all safety codes. Wear safety glasses and rubber
gloves when using inhibited hydrochloric acid solution.
Observe and follow acid manufacturer’s instructions.
Fig. 33 — Forced Circulation Method
Checking System Charge — Units are shipped with
full operating charge. If recharging is necessary:
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.
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.
Warm solution acts faster, but cold solution is just as effec-
tive if applied for a longer period.
NOTE: Operate unit a minimum of 15 minutes before
checking charge.
GRAVITY FLOW METHOD — Do not add solution faster
than vent can exhaust the generated gases.
4. From standard field-supplied Pressure-Temperature
chart for R-410A, find equivalent saturated condens-
ing temperature.
When condenser is full, allow solution to remain overnight,
then drain condenser and flush with clean water. Follow acid
manufacturer’s instructions. See Fig. 32.
5. Read liquid line temperature on thermometer; then
subtract from saturated condensing temperature. The dif-
ference equals subcooling temperature.
6. Compare the subcooling temperature with the normal
temperature listed in Tables 16-22. 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).
FILL CONDENSER WITH
CLEANING SOLUTION. DO
PAIL
NOT ADD SOLUTION
MORE RAPIDLY THAN
VENT CAN EXHAUST
GASES CAUSED BY
FUNNEL
CHEMICAL ACTION.
1”
PIPE
VENT
PIPE
5’ APPROX
Refrigerant Charging
3’ TO 4’
WARNING
CONDENSER
To prevent personal injury, wear safety glasses and gloves
when handling refrigerant. Do not overcharge system —
this can cause compressor flooding.
NOTE: Do not vent or depressurize unit refrigerant to
atmosphere. Remove and recover refrigerant following
accepted practices.
PAIL
Air Coil Fan Motor Removal
CAUTION
Fig. 32 — Gravity Flow Method
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. 33.
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.
Before attempting to remove fan motors or motor mounts,
place a piece of plywood over evaporator coils to prevent
coil damage.
Disconnect motor power wires from motor terminals before
motor is removed from unit.
39
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1. Shut off unit main power supply.
2. Loosen bolts on mounting bracket so that fan belt can be
removed.
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:
3. Loosen and remove the 2 motor mounting bracket bolts
on left side of bracket.
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.
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.
Replacing the WSHP Open Controller’s Bat-
tery — The WSHP Open controller’s 10-year lithium
CR2032 battery provides a minimum of 10,000 hours of data
retention during power outages.
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.
2. Insert the new battery, matching the battery's polarity
with the polarity indicated on the WSHP Open controller.
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.
NOTE: Alarms are automatically reset once alarm con-
dition has been corrected.
See Table 29 for possible alarm cause and solution.
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
TROUBLESHOOTING
(Fig. 34 and 35, and Table 29)
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. 34 for thermistor nominal resistance.
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. 35.
0.0
20.0
40.0
60.0
80.0 100.0 120.0 140.0
Temperature (degF)
Fig. 34 — Thermistor Nominal Resistance
AIR
COIL
SUCTION
AIRFLOW
(°F)
AIRFLOW
(°F)
COMPRESSOR
a50-8
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. 35 — FP1 and FP2 Thermistor Location
40
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Table 29 — 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 8-11.
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 16-22.
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 (10 F) use.
X
X
Inadequate antifreeze level
Improper freeze protect set-
ting (30 F vs 10 F)
X
X
Water temperature out of
range
Bring water temperature within design parameters.
Check temperature and impedance correlation.
X
X
Bad thermistor
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 8-11.
X
X
Air temperature out of range
Too much cold vent air. Bring entering-air temperature within design
parameters.
Improper freeze protect set-
ting (30 F vs 10 F)
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>125 F
Cooling mode FP1>125 F OR Check for poor water flow or airflow.
FP2< 40 F
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 29 — 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 8-11.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower Tables 8-11.
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 16-22.
Restricted metering device Check superheat and subcooling Tables 16-22. 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 8-11.
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 15.
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 16-22. 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 8-11.
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 8-11.
See 'Insufficient Capacity'.
Check blower Tables 8-11.
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 2009 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500049-01
Printed in U.S.A.
Form 50PC-1SI
Pg 50
7-09
Replaces: New
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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
a50-8445
LIQUID LINE
F
F
PSI
WATER IN
PSI
WATER OUT
LOOK UP PRESSURE DROP IN TABLE 23
TO DETERMINE FLOW RATE
COOLING CYCLE ANALYSIS
PSI
°F
SAT
AIR
COIL
SUCTION
°F
°F
COMPRESSOR
DISCHARGE
EXPANSION
COAX
VALVE
°F
a50-8446
LIQUID LINE
°F
°F
PSI
PSI
WATER IN
WATER OUT
LOOK UP PRESSURE DROP IN TABLE 23
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 2009 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500049-01 Printed in U.S.A. Form 50PC-1SI CL-2 7-09 Replaces: New
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