AQUAZONE™
50PEC09-18
Water Source Heat Pump Console Unit
with PURON® Refrigerant (R-410A)
Installation, Start-Up and Service Instructions
Page
CONTENTS
SERVICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45-47
Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
System Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Condenser Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . 45
Condensate Pans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Blower Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Safety Control Reset. . . . . . . . . . . . . . . . . . . . . . . . . . 46
Checking System Charge . . . . . . . . . . . . . . . . . . . . . 47
Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . . 47
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . 47
Replacing the WSHP Open Controller’s
Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . .47-49
Thermistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
WSHP Open Controller. . . . . . . . . . . . . . . . . . . . . . . . 47
APPENDIX A — WSHP OPEN SCREEN
CONFIGURATION. . . . . . . . . . . . . . . . . . . . . . . . .50-55
START-UP CHECKLIST. . . . . . . . . . . . . . . . . CL-1, CL-2
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 17
• STORAGE
• UNIT PROTECTION
Step 3 — Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Step 4 — Wire Electrical Connections . . . . . . . . . . 17
• SUPPLY VOLTAGE
• EXTERNAL LOOP POWER CONNECTION
• 230-V OPERATION
Step 5 — Wire Low Voltage Connections . . . . . . . 30
• WATER FREEZE PROTECTION
• ACCESSORY CONNECTIONS
• WATER SOLENOID VALVES
• OPTIONAL WALL-MOUNTED THERMOSTAT
• OPTIONAL PREMIERLINK™ CONTROLLER
• WSHP OPEN WIRING
Step 6 — Install Supply and Return Piping. . . . . . 32
• SUPPLY AND RETURN HOSES
IMPORTANT: Read the entire instruction manual before
starting installation.
• SUPPLY AND RETURN PIPING
Step 7 — Install Condensate Piping . . . . . . . . . . . . 33
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-35
System Cleaning and Flushing . . . . . . . . . . . . . . . . 33
System Checkout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . .36,37
Complete C Control Jumper Settings. . . . . . . . . . . 36
Complete C Control DIP Switches. . . . . . . . . . . . . . 36
Deluxe D Control Jumper Settings . . . . . . . . . . . . . 36
Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 36
Deluxe D Control Accessory
Relay Configurations . . . . . . . . . . . . . . . . . . . . . . . 37
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37-40
Unit Start-Up/Cooling . . . . . . . . . . . . . . . . . . . . . . . . . 37
Operating Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Unit Start-Up/Heating . . . . . . . . . . . . . . . . . . . . . . . . . 37
Unit Start-Up with WSHP Open Controls. . . . . . . . 38
Flow Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Antifreeze. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Cooling Tower/Boiler Systems. . . . . . . . . . . . . . . . . 40
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems . . . . . . . . . . . . . . . 40
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-43
Power Up Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Units with Aquazone Complete C Control. . . . . . . 40
Units with Aquazone Deluxe D Control . . . . . . . . . 40
Units with WSHP Open Multiple Protocol . . . . . . . 41
COMPLETE C AND DELUXE D BOARD
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components.
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 precau-
tions in the literature, tags and labels attached to the unit, and
other safety precautions that may apply.
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause explosion, fire, electrical shock or other
conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accesso-
ries when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult
local building codes and applicable electrical codes for special
installation requirements.
SYSTEM TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . 43-45
Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
WSHP Open Test Mode . . . . . . . . . . . . . . . . . . . . . . . 44
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Aquazone Deluxe D Control LED Indicators. . . . . 44
Understand the signal words — DANGER, WARNING, and
CAUTION. DANGER identifies the most serious hazards
which will result in severe personal injury or death. WARNING
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500052-01 Printed in U.S.A. Form 50PEC-2SI Pg 1 7-09 Replaces: 50PEC-1SI
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OPTIONAL FLOW
REGULATOR
OPTIONAL
MOTORIZED
WATER VALVE
1.62 (41)
OUT
IN
2.00
(51)
CONTROL BOX
WATER OUT
WATER CONNECTIONS
5/8” (15.9) OD
2.25
(57)
COMPRESSOR
ACCESS
PANEL
COPPER, 1/2” IPT, OR
WATER IN
1/2” EPT
*11.25 (286)
8.00 MIN
(203)
1.75 (44)
CONDENSATE
5/8" (15.9) ID
VINYL HOSE
a50-8335
1.84
(77)
Right Hand Configuration
WATER OUT
WATER IN
OUT
IN
WATER CONNECTIONS
5/8” (15.9) OD
COPPER, 1/2” IPT,
OR 1/2” EPT
1.50 (38)
2.25
(57)
2.00
(51)
*11.25 (286)
8.00 MIN
(203)
2.25
(57)
CONDENSATE
5/8" (15.9) ID
a50-8336
2.72
(96)
VINYL HOSE
Left Hand Configuration
LEGEND
EPT — External Pipe Thread
IPT — Internal Pipe Thread
*Dimension reduced by fitting if selected.
NOTE: Dimensions shown are in inches. Dimensions in parentheses are in millimeters.
Fig. 1 — 50PEC09-15 Piping Dimensions
3
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OPTIONAL AUTO FLOW
VALVE
1.75 (44)
OPTIONAL
OUT
IN
MOTORIZED
WATER VALVE
1.50
(38)
OPT
CONTROL BOX
WATER CONNECTIONS
7/8” (22.2) OD
COPPER, 3/4” IPT, OR
3/4” EPT
2.12
(54)
WATER
IN
WATER
COMPRESSOR
ACCESS
PANEL
*11.12 (282)
OUT
8.00 MIN
(203)
1.75 (44)
a50-8337
CONDENSATE
5/8" (15.9) ID
VINYL HOSE
1.84
(47)
Right Hand Configuration
OPTIONAL
1.50
(38)
AUTOFLOW
OUT
IN
VALVE
1.75 (44)
OPTIONAL
MOTORIZED
WATER VALVE
WATER
CONNECTIONS
7/8” (22.2) OD
COPPER, 3/4”
IPT OR 3/4” EPT
2.12
WATER
IN
WATER
OUT
BLOWER DECK
(54)
*11.12 (282)
8.00 MIN
(203)
BLOWER ACCESS PANEL
2.25
(286)
CONDENSATE
5/8" (15.9) ID
a50-8338
2.72
(96)
VINYL HOSE
Left Hand Configuration
LEGEND
EPT — External Pipe Thread
IPT — Internal Pipe Thread
*Dimension reduced by fitting if selected.
NOTE: Dimensions shown are in inches. Dimensions in parentheses are in millimeters.
Fig. 2 — 50PEC18 Piping Dimensions
4
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3.5
(89)
16.0
(406)
5.0
(127)
DISCHARGE
AIR
30
˚
Filter located inside and at
top of air inlet area. Rotate
filter latch forward, filter rack
can be pulled forward 3” to 4”
for filter access
CONTROL ACCESS DOOR
SIDE
VIEW
FRONT VIEW
25.9
(658)
3.53
(90)
AIR
INLET
AIR INLET AREA
33.5
1.75
(44.5)
11.5
(851)
4.9
(125)
(292)
48.0
(1219)
12.0
(305)
R.H. PIPE AND
ELECTRIC AREA (NOTE 2)
48.0
(1219)
10.0
(254)
6.88
(174)
BOTTOM VIEW
2.12 (54)
.75 (19)
1.75
(44)
(25)
1.0
3.00
(76)
4.5
(114)
1.0 (25)
R.H.
REAR
ACCESS
(NOTE 2)
REAR VIEW
20.0
(508)
21.0
(533)
a50-8339
1.63
(41)
0.59
(15)
4.9
DAMPER OPENING
(125)
11.75
(298)
9.81
(249)
48.0
(1219)
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Access is reduced if optional disconnect box is selected.
3. Optional autoflow valve, motorized water valve and disconnect box are shown.
Fig. 3 — 50PEC09-15 Bottom Return Cabinet Dimensions — Right Hand Piping
5
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3.50
(89)
16.00
(406)
5.00
(127)
DISCHARGE
AIR
30˚
Filter located inside and at
top of air inlet area. Push
tabs up and back to release
filter for replacement.
CONTROL ACCESS DOOR
SIDE
VIEW
FRONT VIEW
25.90
(658)
3.53
(90)
AIR
INLET
AIR INLET AREA
39.50
1.75
(44.5)
11.50
(1003)
4.90
(125)
(292)
54.00
(1372)
12.00
(305)
54.00
(1372)
R.H. PIPE AND
ELECTRIC AREA
(NOTE 2)
10.00
(254)
6.88
(174)
BOTTOM VIEW
2.12 (54)
0.75 (19)
1.75
(44)
3.00
4.50
(114)
(25)
1.00
(76)
1.00 (25)
REAR VIEW
RH REAR
ACCESS
(NOTE 2)
20.00
(508)
21.00
(533)
1.63
(41)
0.59
4.90
DAMPER OPENING
11.75
(125)
(15)
9.81
(249)
(298)
54.00
(1372)
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Access is reduced if optional disconnect box is selected.
3. Optional autoflow valve, motorized water valve and disconnect box are shown.
a50-8340
Fig. 4 — 50PEC18 Bottom Return Cabinet Dimensions — Right Hand Piping
6
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3.5
(89)
12.6
(320)
DISCHARGE
1.5
(38)
AIR
30°
Filter located inside and at
top of air inlet area. Rotate
CONTROL ACCESS DOOR
filter latch forward, filter rack
can be pulled forward 3” to 4”
for filter access
SIDE
VIEW
FRONT VIEW
25.9
(658)
3.53
(90)
AIR
INLET
AIR INLET AREA
33.5
1.75
(44.5)
11.5
(851)
4.9
(125)
(292)
48.0
(1219)
12.0
(305)
48.0
(1219)
L.H. PIPE AND
ELECTRIC AREA
NOTE 2
10.0
(254)
6.88
(174)
BOTTOM VIEW
0.75
(19)
2.12 (54)
1.75
(44)
(25)
1
3.00
4.5
(76)
(114)
1 (25)
21.0
(533)
REAR VIEW
L.H.
REAR
ACCESS
(NOTE 2)
20.0
(508)
1.63
(41)
0.59
4.9
(125)
DAMPER OPENING
(15)
11.75
(298)
9.9
(251)
48.0
(1219)
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Access is reduced if optional disconnect box is selected.
3. Optional autoflow valve, motorized water valve and disconnect box are shown.
a50-8341
Fig. 5 — 50PEC09-15 Bottom Return Cabinet Dimensions — Left Hand Piping
7
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3.50
(89)
12.60
(320)
DISCHARGE
1.50
(38)
AIR
30˚
Filter located inside and at
top of air inlet area. Rotate
CONTROL ACCESS DOOR
filter latch forward, filter rack
can be pulled forward 3” to 4”
for filter access
SIDE
VIEW
FRONT VIEW
25.90
(658)
3.53
(90)
AIR INLET AREA
AIR
INLET
39.50
1.75
(44.5)
11.50
(1003)
4.90
(125)
(292)
54.00
(1372)
12.00
(305)
54.00
(1372)
L.H. PIPE AND
ELECTRIC AREA
(Note 2)
6.88
(174)
10.00
(254)
BOTTOM VIEW
0.75
(19)
2.12 (54)
1.75
(44)
1.00 (25)
1.00 (25)
3.00
4.50
(76)
(114)
REAR
ACCESS
(Note 2)
21.00
(533)
REAR VIEW
20.00
(508)
1.63
(41)
0.59
4.90
(125)
DAMPER OPENING
(15)
11.75
(298)
9.90
(251)
54.00
(1372)
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Access is reduced if optional disconnect box is selected.
3. Optional autoflow valve, motorized water valve and disconnect box are shown.
a50-8342
Fig. 6 — 50PEC18 Bottom Return Cabinet Dimensions — Left Hand Piping
8
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3.5
(89)
16.0
(406)
5.0
(127)
DISCHARGE
AIR
30
˚
CONTROL ACCESS DOOR
FRONT VIEW
SIDE
VIEW
21.0
(533)
21.0
(533)
7.9
(201)
AIR
INLET
43.7
(1110)
12.0
(305)
48.0
(1219)
Filter located behind return
air grille and requires removal of
cabinet front for access.
48.0
(1219)
.50 (13)
12.0
(305)
BOTTOM VIEW
11.50
(292)
R.H. PIPE AND
ELECTRIC AREA
.75 (19)
4.12
(105)
4.5
(25)
1.0
(114)
1.0(25)
REAR VIEW
20.0
(508)
21.0
(533)
R.H.
REAR
ACCESS
(NOTE 2)
48.0
(1219)
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Access is reduced if optional disconnect box is selected.
3. Optional autoflow valve, motorized water valve and disconnect box are shown.
a50-8343
Fig. 7 — 50PEC09-15 Front Return Cabinet Dimensions — Right Hand Piping
9
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3.50
(89)
16.00
(406)
5.00
(127)
DISCHARGE
AIR
30˚
CONTROL ACCESS DOOR
FRONT VIEW
SIDE
VIEW
21.00
(533)
21.00
(533)
7.90
(201)
AIR
INLET
48.00
(1219)
12.00
(305)
54.00
(1372)
Filter located behind return
air grille and requires removal of
cabinet front for access.
54.00
(1372)
.50 (13)
R.H. PIPE AND
ELECTRIC AREA
(NOTE 2)
12.00
(305)
BOTTOM VIEW
11.50
(292)
.75 (19)
4.12
4.12
(105)
(105)
(25)
1.00
1.00(25)
REAR VIEW
20.00
(508)
21.00
(533)
RH REAR
ACCESS
(NOTE 2)
54.00
(1372)
NOTES:
a50-8344
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Access is reduced if optional disconnect box is selected.
3. Optional autoflow valve, motorized water valve and disconnect box are shown.
Fig. 8 — 50PEC18 Front Return Cabinet Dimensions — Right Hand Piping
10
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(89)
°
.50 (13)
11.50
(292)
(Note 2)
.75
(19)
4.12
(105)
L.H.
(NOTE 2)
a50-8345
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Access is reduced if optional disconnect box is selected.
3. Optional autoflow valve, motorized water valve and disconnect box are shown.
Fig. 9 — 50PEC09-15 Front Return Cabinet Dimensions — Left Hand Piping
11
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12.60
(320)
DISCHARGE
1.50
(38.1)
AIR
3.50
(89)
30˚
CONTROL ACCESS DOOR
FRONT VIEW
SIDE
VIEW
21.00
(533)
21.00
(533)
7.90
(201)
AIR
INLET
48.00
(1219)
12.00
(305)
54.00
(1372)
Filter located behind return
air grille and requires removal of
cabinet front for access.
.50
(13)
54.00
(1372)
L.H. PIPE AND
ELECTRIC AREA
(Note 2)
BOTTOM VIEW
11.50
(292)
.75
(19)
4.12
(105)
1.00 (25)
1.00 (25)
4.50
(114)
21.00
(533)
REAR
ACCESS
(Note 2)
REAR VIEW
20.00
(508)
54.00
(1372)
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Access is reduced if optional disconnect box is selected.
3. Optional autoflow valve, motorized water valve and disconnect box are shown.
a50-8346
Fig. 10 — 50PEC18 Front Return Cabinet Dimensions — Left Hand Piping
12
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a50-8347
13
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a50-8348
14
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15
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16
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5. Fasten the backplate onto the wall through the screw holes
located in the back flange. Secure the subbase in place.
Step 2 — Check Unit — Upon receipt of shipment at
the jobsite, carefully check the shipment against the bill of lad-
ing. Make sure all units have been received. Inspect the carton
or crating of each unit, and inspect each unit for damage. En-
sure the shipping company makes proper notation of any short-
ages or damage on all copies of the freight bill. Concealed
damage not discovered during unloading must be reported to
the shipping company within 15 days of receipt of shipment.
Step 4 — Wire Electrical Connections
WARNING
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.
NOTE: It is the responsibility of the purchaser to file all neces-
sary claims with the shipping company.
STORAGE
CAUTION
CAUTION
Use only copper conductors for field-installed electrical
wiring. Unit terminals are not designed to accept other
types of conductors.
DO NOT store or install console units in corrosive environ-
ments or in locations subject to temperature or humidity
extremes (e.g., attics, garages, rooftops, etc.). Corrosive
conditions and high temperature or humidity can signifi-
cantly reduce performance, reliability, and service life.
Always move units in an upright position. Tilting units on
their sides may cause equipment damage.
All field-installed wiring, including the electrical ground,
MUST comply with National Electrical Code (NEC) as well as
all applicable local codes. In addition, all field wiring must
conform to the Class II temperature limitations described in the
NEC.
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 connec-
tions shown in Fig. 16 when using field-supplied disconnect.
Refer to unit wiring diagrams Fig. 17-29 for a schematic of
the field connections, which must be made by the installing (or
electrical) contractor. Operating voltage must be within voltage
range shown in Table 2.
Make all final electrical connections with a length of flexi-
ble conduit to minimize vibration and sound transmission to
the building.
SUPPLY VOLTAGE — Operating voltage to unit must be
within voltage range indicated on unit nameplate.
Upon the arrival of equipment at the jobsite, immediately
store units in their shipping cartons in a clean, dry area. Store
units in an upright position at all times. Stack units a maxi-
mum of 3 units high. Use pallets to separate each layer of
units. DO NOT remove equipment from shipping cartons
until equipment is required for installation.
UNIT PROTECTION — Cover console units on the jobsite
with either shipping cartons, vinyl film, or an equivalent
protective covering. Cap the open ends of pipes stored on the
jobsite. In areas where painting, plastering, or the spraying of
fireproof material has not been completed, all due precautions
must be taken to avoid physical damage to the units and con-
tamination by foreign material. Physical damage and contami-
nation may prevent proper start-up and may result in costly
equipment clean-up.
EXTERNAL LOOP POWER CONNECTION — If the unit
will be connected to an external loop pump or flow controller,
connect the pump to the loop pump terminal block PB1. The
maximum power handling is 4 amps at 240-v. The pumps will
automatically cycle as required by the unit.
Examine all pipes, fittings, and valves before installing any
of the system components. Remove any dirt found on these
components.
230-V OPERATION — All 208/230-v units are factory-
wired for 208-v. The transformer wiring may be switched for
230-v operation (as illustrated on the wiring diagrams) by
switching the RED and ORG leads at L1.
Step 3 — Mount Unit
1. Unpack the unit from the shipping carton. Remove the
front cabinet by lifting up and away from the backplate.
Protect the cabinet from damage during installation by re-
turning it to its original vinyl pack until required.
SHIPPING
BOLTS
2. Remove compressor isolation plate shipping bolts (4), as
shown in Fig. 15.
3. Using a carpenter’s square and a level, ensure the unit
is level. Shim the unit if necessary to assure proper
installation.
Poor or inadequate installation may result in noisy
unit operation or unattractive appearance.
4. Select the proper fasteners to connect the backplate se-
curely to the wall.
Fig. 15 — Remove 4 Shipping Bolts on
Compressor Isolator Plate
A
WARNING
FIELD SUPPLIED
DISCONNECT SWITCH
Disconnect electrical power source to prevent injury or death from electri-
cal shock.
ROOM THERMOSTAT
HEAT PUMP
CAUTION
B
Use copper conductors only to prevent equipment damage.
A = Two power wires for single-phase units.
B = 1 heat/1 cool/manual or auto changeover remote 24-V thermostat.
NOTE: All customer-supplied wiring to be copper only and must conform to national and local electrical codes. Wiring shown with dashed lines must be
field-supplied and field-installed. “B” wiring only required with systems using remote-mounted thermostats.
Fig. 16 — Typical Field-Installed Wiring
17
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a50-8452
Complete C
SEE NOTE 9
BLOWER MOTOR WIRING
UNIT SIZE
09-18
POLE A POLE B
Complete C
5
4
NOTES:
LEGEND
1. Compressor and blower motor thermally pro-
tected internally.
AL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Blower Motor
Relay/Contactor Coil
Solenoid Coil
BM
BR
2. All wiring to the unit must comply with local
codes.
Blower Relay
CAP
CB
Capacitor
Circuit Breaker
Sensor, Condensate Overflow
Compressor Relay
Damper Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Jumper Wire for Alarm
Loss of Charge Pressure Switch
Power Terminal Block
Return Air Sensor
3. Transformer is wired to 115-V (WHT) lead for
115/1/60 units; 265-V (BRN) lead for 265/1/60
units; or 208-V (RED) lead for 208/1/60 units.
For 230/1/60 operation, switch the RED and
ORG leads at L1 and insulate the RED lead.
Transformer is energy limiting or may have a
circuit breaker.
4. FP1 thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions,
cut JW3 jumper.
5. For remote sensor, position jumper J1 on upper
2 pins.
6. For °F position, position jumper on both pins.
For °C, position jumper on one pin.
7. Transformer secondary ground via Complete C
board standoffs and screws to control box.
(Ground available from top two standoffs as
shown.)
8. Mate-N-Lok† plug is optional.
9. Factory-cut jumper (JW1). Dry contact will be
available between AL1 and AL2.
CO
Thermistor
CR
DM
FP1
FP2
HP
Circuit Breaker
Relay Contacts-N.O.
Switch-Temperature
JW1
LOC
PB
RAS
RVS
TRANS
WV
----------
Switch-High Pressure
Switch-Low Pressure
Ground
Reversing Valve Solenoid
Transformer
Water Valve
—
—
Wire Nut
Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Mate-N-Lok
*Optional wiring.
†Registered trademark of AMP Incorporated.
Option Low Voltage Wiring
Fig. 17 — 50PEC Unit Manual or Auto Changeover with Complete C Controller Wiring
18
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COMPLETE C
a50-8327.eps
COMPLETE C
PEC
PEC12-18
PEC
LEGEND
NOTES:
1. Compressor and blower motor thermally pro-
tected internally.
AL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Blower Motor
Relay/Contactor Coil
Solenoid Coil
BM
2. All wiring to the unit must comply with local
codes.
3. Transformer is wired to 115-V (WHT) lead for
115/1/60 units, 265-V (BRN) lead for 265/1/60
units, 240-V (ORG) lead for 240/1/50 units, or
208-V (RED) lead for 208/1/60 units.
Rewire transformer L1 connection if voltage is
230-1-60 or 220-1-50, insulate unused lead.
4. FP1 thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions,
cut JW3 jumper.
BR
Blower Relay
CAP
CB
Capacitor
Circuit Breaker
Sensor, Condensate Overflow
Compressor Relay
Damper Motor
CO
Thermistor
CR
DM
Circuit Breaker
FP1
FP2
FSS
HP
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
Fan Speed Switch
Relay Contacts-N.O.
Switch-Temperature
High-Pressure Switch
Jumper Wire for Alarm
Loss of Charge Pressure Switch
Power Terminal Block
Reversing Valve Solenoid
Transformer
JW1
LOC
PB
RVS
TRANS
WV
Switch-High Pressure
Switch-Low Pressure
Ground
5. Refer to LonWorks† Installation, Application, and
Operation manual for control wiring to the unit.
Low voltage wiring must be “class 1” and voltage
rated equal to or greater than unit supply
voltage.
Water Valve
6. Factory-cut jumper (JW1). Dry contact will be
available between AL1 and AL2.
----------
Field Line Voltage Wiring
Field Low-Voltage Wiring
Option Low-Voltage Wiring
Printed Circuit Trace
Wire Nut
Mate-N-Lock
7. Transformer secondary ground via Complete C
board standoffs and screws to control box.
*Optional wiring.
†Registered trademark of Echelon Corporation.
(Ground available from top
shown.)
2
standoffs as
Fig. 18 — 50PEC Unit with Complete C and LON Controllers
19
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DELUXE D
a50-8328
DELUXE D
LEGEND
NOTES:
1. Compressor and blower motor thermally pro-
tected internally.
AL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Blower Motor
Relay/Contactor Coil
Solenoid Coil
BM
CAP
CB
2. All wiring to the unit must comply with local
codes.
3. Transformer is wired to 115-V (WHT) lead for
115/1/60 units, 265-V (BRN) lead for 265/1/60
units, 240-V (ORG) lead for 240/1/50 units, or
208-V (RED) lead for 208/1/60 units.
Rewire transformer L1 connection if voltage is
230-1-60 or 220-1-50, insulate unused lead.
4. FP1 thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions,
cut JW3 jumper.
Capacitor
Circuit Breaker
CO
CR
Sensor, Condensate Overflow
Compressor Relay
Thermistor
DM
FP1
FP2
FSS
HP
Damper Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
Fan Speed Switch
High-Pressure Switch
Jumper Wire for Alarm
Loss of Charge Pressure Switch
Power Terminal Block
Reversing Valve Solenoid
Transformer
Circuit Breaker
Relay Contacts-N.O.
Switch-Temperature
JW1
LOC
PB
Switch-High Pressure
Switch-Low Pressure
Ground
5. Refer to Microprocessor Control Installation,
Application, and Operation manual for control
wiring to the unit. Low voltage wiring must be
“class 1” and voltage rated equal to or greater
than unit supply voltage.
RVS
TRANS
WV
----------
Water Valve
Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
6. Factory-cut jumper (JW4). Dry contact will be
available between AL1 and AL2.
Wire Nut
Mate-N-Lock
7. Transformer secondary ground via Deluxe D
board standoffs and screws to control box.
*Optional wiring.
(Ground available from top
shown.)
2
standoffs as
Fig. 19 — 50PEC Unit with Deluxe D and LON Controllers
20
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DELUXE D
a50-8329
DELUXE D
PEC09-18
LEGEND
NOTES:
1. Compressor and blower motor thermally pro-
tected internally.
AL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Blower Motor
Relay/Contactor Coil
BM
2. All wiring to the unit must comply with local
codes.
3. Transformer is wired to 115-V (WHT) lead for
115/1/60 units, 265-V (BRN) lead for 265/1/60
units, 240-V (ORG) lead for 240/1/50 units, or
208-V (RED) lead for 208/1/60 units.
Rewire transformer L1 connection if voltage is
230-1-60 or 220-1-50, insulate unused lead.
4. FP1 thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions,
cut JW3 jumper.
BR
Blower Relay
CAP
CB
Capacitor
Circuit Breaker
Sensor, Condensate Overflow
Compressor Relay
Damper Motor
Solenoid Coil
Thermistor
CO
CR
DM
Circuit Breaker
FP1
FP2
HP
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Jumper Wire for Alarm
Loss of Charge Pressure Switch
Night Low Limit Switch
Power Terminal Block
Return Air Sensor
Relay Contacts-N.O.
Switch-Temperature
JW1
LOC
NLL
PB
Switch-High Pressure
Switch-Low Pressure
Ground
5. Refer to Microprocessor Control Installation,
Application, and Operation manual for control
wiring to the unit. Low voltage wiring must be
“class 1” and voltage rated equal to or greater
than unit supply voltage.
RAS
RVS
TRANS
WV
Reversing Valve Solenoid
Transformer
Water Valve
Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
6. Factory-cut jumper (JW4). Dry contact will be
available between AL1 and AL2.
Wire Nut
----------
Mate-N-Lock
7. Transformer secondary ground via Deluxe D
board standoffs and screws to control box.
(Ground available from top
shown.)
2
standoffs as
*Optional wiring.
Fig. 20 — 50PEC Unit Manual or Auto Changeover and Deluxe D Controller
21
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GROUND
COMPRESSOR
S
R
C
NEUTRAL ON 265V
SYSTEMS
POWER SUPPLY
REFER TO DATA PLATE
USE COPPER CONDUCTORS ONLY.
SEE NOTE 2
H
BLU
RED
CAP
RED
8
4
6
2
RED
C
L2
L1
REFER TO DISCONNECT
BOX FOR OPTIONAL
CR
POWER SUPPLY CONNECTION
F
BLK
BLK
L2 (ribbed)
GROUND
OPTIONAL
CORD
CONNECTION
2
1
B (HIGH)
BRN
YEL
BM
L1 (plain)
A (LOW)
RED
SEE
NOTE 3
TRANS
COM
NO
BLK
CB*
24V
BLK
2
BLK
BR
1
BLK
FSS
ORG
230V
YEL
ORG
0
TRANSFORMER PRIMARY
LEAD COLORS
DM
BR
YEL
BRN
SEE
NOTE 7
1
1
0
VOLTAGE
LEAD COLOR
SEE
NOTE 7
CR
115
208
230
265
WHT
RED
ORG
BRN
TRANS
BLK
YEL GRY BRN BRN BRN
BR BRG CCG
YEL
CB
24V
RED
CC
(220V)
BLU
YEL
ORG (240V)
C
R
TEST PINS
SEE
BRN
TYPICAL HEAT PUMP T-STAT
SEE NOTE 5
COMPR.
RELAY
RED
RED
BLU
BRN
GRY
GRY
VIO
1
2
HP
HP
CLASS 1 WIRING
REQUIRED INSIDE
CONTROL BOX
CLASS 1 OR 2
WIRING ACCEPTABLE
OUTSIDE
NOTE 4
Y
3
LOC
4
5
FP1
6
JW3
LOC
CONTROL BOX
FP1
COMPRESSOR
Y
JW2
Y
FP2
FP1
W
O
G
R
C
DIP SWITCH
SEE
COOLING
FAN
O
G
R
C
L
1 PM: DISABLED/
ENABLED
2 STAGE 2: 2/1
3 NOT USED
4 NOT USED
NOTE 4
7
FP2
FP2
VIO
8
24 VAC
COMMON
ALARM
BRN
9
10
RVS
RV
ORG
5 FP1/FP2
FAULTS: 3/1
JW1
NOT USED
YEL
AL1
AL2
OFF ON
CO
STATUS
LED
CO12
P2
G
SEE
NOTE 6
ALARM
RELAY
A
24V
DC
COMPLETE C
MICRO-
PROCESSOR
CONTROL
LOGIC
P1
BRN
WV
YEL
EH1
EH2
P3
GROUND
PB
BLOWER MOTOR WIRING
UNIT SIZE POLE A POLE B
CAP
CO
TRANSFORMER
CR
09
12
15
18
5
4
4
4
4
3
3
3
BR
COMPLETE
C
CONTROL
*Optional wiring.
NOTES:
1. Compressor and blower motor thermally
protected internally.
LEGEND
2. All wiring to the unit must comply with
local codes.
AL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Blower Motor
Printed Circuit Trace
Option Low Voltage
Wiring
3. Transformer is wired to 115-V (WHT) lead
for 115/1/60 units; 265-V (BRN) lead for
265/1/60 units; or 208-V (RED) lead for
208/1/60 units.
BM
BR
Blower Relay
CAP
CB
Capacitor
Circuit Breaker
Sensor, Condensate Overflow
Compressor Relay
Damper Motor
Relay/Contactor Coil
For 230/1/60 operation, switch the RED
and ORG leads at L1 and insulate the
RED lead.
CO
CR
Solenoid Coil
DM
FP1
FP2
FSS
HP
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
Fan Speed Switch
Transformer is energy limiting or may
Thermistor
have a circuit breaker.
Circuit Breaker
4. FP1 thermistor provides freeze protection
for WATER. When using ANTI-FREEZE
solutions, cut JW3 jumper.
High-Pressure Switch
Relay Contacts-N.O.
JW1
LOC
PB
Jumper Wire for Alarm
Loss of Charge Pressure Switch
Power Terminal Block
5. Typical heat pump thermostat wiring
shown. Refer to thermostat Installation
Instructions for wiring to the unit.
6. 24-V alarm signal shown. For dry alarm
contact, cut JW1 jumper and dry contact
will be available between AL1 and AL2.
7. Transformer secondary ground via Com-
plete C board standoffs and screws to
control box. (Ground available from top
two standoffs as shown.)
Switch-High Pressure
Switch-Low Pressure
Ground
PM
Performance Monitor
RVS
Reversing Valve Solenoid
TRANS — Transformer
WV
—
Water Valve
Wire Nut
---------- Field Line Voltage Wiring
Field Low-Voltage Wiring
Mate-N-Lock
Fig. 21 — 50PEC Unit Remote-Mounted Thermostat with Complete C Controller Wiring
22
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GROUND
COMPRESSOR
BLU
NEUTRAL ON 265V
SYSTEMS
POWER SUPPLY
REFER TO DATA PLATE
USE COPPER CONDUCTORS ONLY.
SEE NOTE 2
H
S
CAP
RED
R
8
4
6
2
C
RED
RED
C
L2
L1
REFER TO DISCONNECT
BOX FOR OPTIONAL
CR
POWER SUPPLY CONNECTION
F
BLK
BLK
L2 (ribbed)
GROUND
OPTIONAL
CORD
CONNECTION
2
1
B (HIGH)
BRN
YEL
BM
L1 (plain)
A (LOW)
RED
CB*
24V
BLK
TRANS
ORG
230V
BLK
SEE
NOTE 3
YEL
BLU
TRANSFORMER PRIMARY
LEAD COLORS
BRN
SEE
NOTE 7
1
3
VOLTAGE
LEAD COLOR
CLASS 1 OR 2 WIRING
ACCEPTABLE
115
208
230
265
WHT
RED
ORG
BRN
FSS
2
C
R
FAN ENABLE
RELAY
COM
R C S
S
C
GRY
GRY
OUTSIDE
CLASS 1 WIRING
COM2 COM1
CONTROL BOX REQUIRED INSIDE
P1
Y1
NO
COMPRESSOR
Y
1
2
3
4
5
6
7
8
FAN
Y1
W1
SPEED
RELAY
COM
NO
COOLING
O
O/W2
G
FAN
NC
G
DELUXE D
MICROPROCESSOR
CONTROL LOGIC
24 VAC
R
R
C
AL1
COMMON
C
1
RED
HP
HP
ALARM
X1
2
3
SEE
NOTE 6
JW4
RED
BLU
BRN
GRY
GRY
VIO
VIO
BRN
ORG
ALARM
RELAY
LOC
LOC
FP1
P2
AL2
R
NSB
C
ESD
OVR
H
4
5
6
7
8
9
TYPICAL HEAT
PUMP T-STAT
G
STATUS
RED
AL2 DRY
FP1
FP2
RV
SEE NOTE 5
SEE
NOTE
4
Y
TEST
TIME CLOCK
R
FAULT
FP2
BRN
CLOSED=UNOCCUPIED
RV
BRN
RELAY
RVS
10
WHT
NOT USED
YEL
TEST
PINS
CO12
P7
CO
NLL
BRN
ORG
YEL
A
WV
SEE
JW3
FP1 LOW
JW2
FP2 LOW
JW1
LP N.O.
P3
R
24V
DC
NOTE 4
RED
YEL
YEL
YEL
NO1
NC1
COM
NO2
NC2
COM
R
EH1
EH2
P6
DM
ACC1
OVERRIDE
WITH DIGITAL T-STAT
RELAY
OFF ON
CCG
BRN
1
1
PM: DISABLE/
ENABLE
BLOWER MOTOR WIRING
UNIT SIZE POLE A POLE B
COMPR.
RELAY
ACC2
OVERRIDE
OVERRIDE
OV
OV
CR
YEL
OFF ON
2 UNIT STAGE: 2/1
3 T-STAT: HEAT COOL/
HEAT PUMP
RELAY
1
2
3
4
5
6
7
8
0
ACC1
GROUND
CC
FUNCTIONS
LUG
09
12
15
18
5
4
4
4
4
3
3
3
4 RV ON B/RV ON O
5 DEHUMID/NORMAL
6 NOT USED
PB
CAP
ACC2
FUNCTIONS
H: HI FAN/DEHUMID
NOT USED
TRANSFORMER
CR
7 BOILERLESS:
ENABLE/DISABLE
8 BOILERLESS:
40°F/50°F
BR 1
(LO)
S1
S2
DIP SWITCH
PACKAGE
DIP SWITCH
PACKAGE
*Optional wiring.
NOTES:
DELUXE
D
CONTROL
1. Compressor and blower motor thermally
protected internally.
BR 2
(HI)
2. All wiring to the unit must comply with local
codes.
LEGEND
AL
— Alarm Relay Contacts
— Blower Motor
Field Low-Voltage Wiring
Printed Circuit Trace
Option Low Voltage Wiring
3. Transformer is wired to 115-V (WHT) lead
for 115/1/60 units; 265-V (BRN) lead for 265/
1/60 units; or 208-V (RED) lead for 208/1/60
units.
BM
BR
— Blower Relay
CAP
CB
— Capacitor
— Circuit Breaker
Relay/Contactor Coil
For 230/1/60 operation, switch the RED and
ORG leads at L1 and insulate the RED lead.
Transformer is energy limiting or may have a
circuit breaker.
CO
— Sensor, Condensate Overflow
— Compressor Relay
— Damper Motor
CR
Solenoid Coil
DM
FP1
FP2
FSS
HP
— Sensor, Water Coil Freeze Protection
— Sensor, Air Coil Freeze Protection
— Fan Speed Switch
Thermistor
4. FP1 thermistor provides freeze protection
for WATER. When using ANTI-FREEZE
solutions, cut JW3 jumper.
5. Typical heat pump thermostat wiring shown.
Refer to thermostat Installation Instructions
for wiring to the unit.
6. 24-V alarm signal shown. For dry alarm con-
tact, cut AL2 DRY (JW4) jumper and dry
contact will be available between AL1 and
AL2.
7. Transformer secondary ground via Deluxe D
board standoffs and screws to control box.
(Ground available from top two standoffs as
shown.)
Circuit Breaker
— High-Pressure Switch
— Jumper Wire for Alarm
— Loss of Charge Pressure Switch
— Night Low Limit
Relay Contacts-N.O.
JW1
LOC
NLL
OV
Switch-High Pressure
Switch-Low Pressure
Ground
— Override
PB
— Power Terminal Block
— Performance Monitor
PM
RVS
— Reversing Valve Solenoid
TRANS — Transformer
Wire Nut
WV
— Water Valve
Mate-N-Lock
---------- Field Line Voltage Wiring
Fig. 22 — 50PEC Unit Remote-Mounted Thermostat with Deluxe D Controller Wiring
23
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COMPLETE
C
CONTROL
PREMIER
LINK
PWR
Y
HS1/EXH/RVS
W
CR
CR
O
G
LEGEND
Control Relay
LWT — Leaving Water Temperature Sensor
SAT — Supply Air Temperature Sensor
SPT — Space Temperature Sensor
CR
—
R
C
CMP1
FAN
NOTE: Reversing valve is on in Cooling mode.
AL1
AL2
A
J5
J6
J4
L
W
T
S
P
T
S
A
T
Fig. 23 — PremierLink™ Controller Applications with Complete C Control
PREMIER
LINK
PWR
DELUXE
D
CONTROL
Y1
Y2
HS2
HS1
W1
O/W2
G
LEGEND
CMP2
CMP1
FAN
LWT — Leaving Water Temperature Sensor
SAT — Supply Air Temperature Sensor
SPT — Space Temperature Sensor
NOTE: Reversing valve is on in Cooling mode.
R
C
AL1
J5
J6
J4
L
W
T
S
P
T
S
A
T
Fig. 24 — PremierLink Controller Applications with Deluxe D Control
24
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A50-8355
25
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A50-8354
26
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A50-8356
27
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A50-8353
28
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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 E G R
W H I T E
+ t e R n
- t
R n e
+ 1 2
B L A C K
R E D
V
To WSHP Controller
Rnet Terminals (J13)
29
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Table 2 — Electrical Data — 50PEC Units
COMPRESSOR
QTY RLA LRA
50PEC
UNIT SIZE
VOLTAGE
CODE
MIN/MAX
VOLTAGE
FAN MOTOR TOTAL UNIT MIN CIRCUIT
MAX
FUSE/HACR
V-PH-Hz
FLA
FLA
AMPS
1
3
4
1
3
4
3
4
3
4
115-1-60
208/230-1-60
265-1-60
115-1-60
208/230-1-60
265-1-60
208/230-1-60
265-1-60
208/230-1-60
265-1-60
104/126
197/254
239/292
104/126
197/254
239/292
197/254
239/292
197/254
239/292
1
1
1
1
1
1
1
1
1
1
8.1
4.5
3.1
10.6
5.2
4.2
6.1
4.7
6.8
6.2
46.5
23.0
24.0
55.8
24.0
25.0
30.0
28.5
38.0
29.0
0.6
0.4
0.4
1.0
0.6
0.4
0.8
0.6
0.7
0.6
8.6
4.9
3.5
11.6
5.8
4.6
6.9
5.3
7.5
6.8
10.7
6.0
4.3
14.3
7.1
5.7
8.4
6.5
9.2
8.4
15
15
15
25
15
15
15
15
15
15
09
12
15
18
LEGEND
Full Load Amps
FLA
—
HACR — Heating, Air Conditioning and Refrigeration
LRA
RLA
—
—
Locked Rotor Amps
Rated Load Amps
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 31 shows typical wiring for a 24-vac external
solenoid valve. Figures 32 and 33 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:
Step 5 — Wire Low Voltage Connections
WATER FREEZE PROTECTION — The Aquazone™ con-
trol 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. 30.
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.
a50-7467tf
a50-8441
AQUAZONE CONTROL (Complete C Control Shown)
2
AMV
TACO VALVE
3
1
Fig. 30 — Typical Aquazone Control Board
Jumper Locations
HEATER SWITCH
ACCESSORY CONNECTIONS — Terminal labeled 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. 31.
Refer to the specific unit wiring schematic for details.
NOTE: The A terminal should only be used with 24-v signals
— not line voltage signals.
THERMOSTAT
Fig. 32 — AMV Valve Wiring
Terminal Strip
C
Typical
Water
Valve
24 VAC
A
a50-8442
Fig. 31 — Typical Aquazone Accessory Wiring
Fig. 33 — Taco SBV Valve Wiring
30
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OPTIONAL WALL-MOUNTED THERMOSTAT — The
50PEC water source heat pump units are built with standard in-
ternal thermostats in either manual changeover (MCO) or auto-
matic changeover (ACO) configuration. Refer to Fig. 17-20.
When desired, the unit can be furnished with a 24-v control
circuit which is field wired to a Carrier-supplied accessory re-
mote thermostat. Most heat pump thermostats can be used with
the controller. Use a thermostat with Y, G, O and W outputs.
Refer to unit wiring diagrams in Fig. 21 and 22 and Aquazone
Controls, Operation, and Troubleshooting Instructions for addi-
tional information.
Vendor installation instructions and additional installation
information is shipped with each thermostat.
NOTE: Low-voltage wiring between the unit and the wall ther-
mostat must comply with all applicable electrical codes
(i.e., NEC and local codes), and be completed before the unit is
installed.
Field-Supplied Sensor Hardware — The WSHP Open con-
troller is configurable with the following field-supplied sen-
sors. See Table 4.
Table 4 — Field-Supplied Sensors for
WSHP Open Controller
SENSOR
NOTES
Space Temperature Sensor
(SPT)
Field Installed (Must be used with
WSHP Open controller.)
Outdoor Air
Temperature Sensor
Network Sensor
Indoor Air Quality Sensor
(Separate Sensor)
Required only for demand
control ventilation.
Space Relative Humidity
Sensor
Separate Sensor
NOTE: BACview6 Handheld or Virtual BACview can be used as the
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.
Table 3 lists recommended wire sizes and lengths to install
the thermostat. The total resistance of low-voltage wiring must
not exceed 1 ohm. Any resistance in excess of 1 ohm may
cause the control to malfunction because of high voltage drop.
The WSHP Open system offers the following SPT sensors.
See Table 5.
Table 3 — Recommended Thermostat Wire Sizes
WIRE SIZE
MAX WIRE LENGTH*
Table 5 — SPT Sensors
18-Gage
16-Gage
14-Gage
75 ft
125 ft
200 ft
PART
NUMBER
SENSOR
FEATURES
SPT
Standard
• Local access port
• No operator control
SPS
*Length = Physical distance from thermostat to unit.
• Slide potentiometer to adjust set point
• Manual on button to override schedule
• LED to show occupied status
• Local access port
OPTIONAL PREMIERLINK™ CONTROLLER — This di-
rect digital controller (DDC) allows the water source heat
pump to be incorporated into a Carrier Comfort Network®
(CCN) system installation. PremierLink control is factory-
installed with the Complete C controller, or field-installed with
the Deluxe D control option. Refer to Fig. 23 and 24.
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.
SPT Plus
SPT Pro
SPPL
SPP
• 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
• 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
WARNING
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.
*The SPT Pro Plus fan speed adjustment has no effect in this
application.
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:
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.
• 1 SPT Plus, SPT Pro, or SPT Pro Plus sensor
• 1 to 4 SPT Standard sensors
• 1 to 4 SPT Standard sensors and 1 SPT Plus, SPT Pro, or
SPT Pro Plus sensor
• Any of the above combinations, plus up to 2 BACview6
Handheld but no more than 6 total devices
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.
3. Connect the wires to the removable Phoenix connectors.
4. Reconnect the connectors to the board.
31
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Table 6 — Rnet Wiring Specifications
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.
RNET WIRING SPECIFICATIONS
4 conductor, unshielded, CMP,
Description
plenum rated cable
Conductor
Maximum Length
18 AWG
500 ft
To wire the IAQ sensor to the controller:
1. Wire the sensor to the controller. See Fig. 25-29.
Jacket: white
Recommended Coloring
Wiring: black, white, green, red
1
2. Install a field-supplied 250-ohm, /4 watt, 2% tolerance
UL Temperature
Voltage
32 to 167 F
300-vac, power limited
UL: NEC CL2P, or better
resistor across the controller’s RH/IAQ and Gnd
terminals.
Listing
3. Verify the the RH/IAQ jumper is set to 0 to 5-vdc.
LEGEND
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.
AWG — American Wire Gage
CMP — Communications Plenum Cable
NEC — National Electrical Code
UL
— Underwriters Laboratories
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.
To wire the SPT sensor to the controller:
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. 34.
OUTER JACKET
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.
a50-8443
.25 IN.
INNER INSULATION
Fig. 34 — Rnet Cable Wire
3. Wire each terminal on the sensor to the same terminal on
the controller. See Fig. 25-29. Table 7 shows the recom-
mended Rnet wiring scheme.
Step 6 — Install Supply and Return Piping
CAUTION
Table 7 — Rnet Wiring
To ensure proper functioning of unit and system, be sure to
connect entering water to upper pipe on right-hand units.
On left-hand units, connect entering water to lower pipe.
Failure to do so could result in equipment damage.
WIRE
Red
TERMINAL
+12-v
Black
White
Green
.Rnet–
Rnet+
Gnd
SUPPLY AND RETURN HOSES — Optional pressure-rated
hose assemblies are available for use with units. Use the fol-
lowing guidelines when installing supply and return hose
assemblies.
NOTE: The wire should be connected to the terminal shown.
Wiring a Supply Air Temperature (SAT) Sensor
SAT sensor is required for reheat applications.
—
The
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.
To wire the SAT sensor to the controller:
1. Wire the sensor to the controller. See Fig. 25-29.
2. Verify that the Enable SAT jumper is on.
1. Install supply and return hoses fitted with swivel-joint
fittings at one end to prevent the hose from twisting.
2. Use male adapters to secure the hose assembly to the unit
and the riser.
3. Do not allow the hose to twist during installation. Twist-
ing may damage the hose wall or the rubber compound.
4. Use pipe joint compound sparingly on the fitting adapt-
ers’ male pipe threads.
5. Prevent sealant from reaching the joint’s flared surfaces.
6. Do not use pipe joint compound when Teflon* thread
tape is pre-applied to hose assemblies or when flared-end
connections are used.
7. Maximum torque that may be applied to brass fittings is
30 ft-lb. When a torque wrench is not used, tighten brass
fittings finger-tight plus one quarter turn.
3. Verify that the Enable SAT and Remote jumper is in the
left position.
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.)
8. Tighten steel fittings as necessary.
9. Use shut-off/balancing valves, flow indicators, and drain
tees in the supply runout and return at each floor to aid in
loop balancing and servicing.
SUPPLY AND RETURN PIPING — System piping MUST
comply with all applicable codes.
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.
1. Install a drain valve at the base of each supply and return
riser to enable system flushing at start-up and during rou-
tine servicing.
*Teflon is a trademark of E. I. du Pont de Nemours and Company.
32
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2. Install shut-off/balancing valves and unions at each unit
to allow unit removal for servicing.
NOTE: If flex hoses are used, unions are not necessary.
3. Install strainers at the inlet of each system circulating
pump.
PRE-START-UP
System Cleaning and Flushing — Cleaning and
flushing the unit and system is the single most important step to
ensure proper start-up and continued efficient operation of the
system.
IMPORTANT: Since loop temperatures are normally
between 60 and 90 F, pipe sweating and heat loss do not
occur at normal ambient temperature conditions. Insulation
must be installed on loop water piping on those sections
that run through unheated areas or are located outside the
building. If loop temperatures are expected below the
ambient dew point, the optional internal insulation
(extended range) package must be ordered.
WARNING
To prevent injury or death due to electrical shock or contact
with moving parts, open unit disconnect before servicing
unit.
Follow the instructions below to properly clean and flush
the system:
CAUTION
CAUTION
DO NOT FLUSH SYSTEM THROUGH THE UNIT!
DO NOT bend or kink supply lines or hoses. Damage to
unit may result.
1. Verify that electrical power to the units is disconnected,
and that the circulation pump is deenergized.
2. Connect the supply hose directly to the return riser valve.
Use a single length of flexible hose, as shown in Fig. 35.
NOTE: If the length of hose is too short (i.e., the resulting con-
nection would exceed the minimum bend radius of the hose),
substitute two lengths of flexible hose joined together with a
field-supplied, standard NPT coupling and the flare-fitting-to-
pipe adapters provided with the hose kit (Fig. 35).
3. Open all air vents. Fill the system with water. Do not al-
low system to overflow. Bleed all air from the system.
Check the system for leaks and repair appropriately.
4. Check and adjust the water and air level in the expansion
tank.
5. Verify all strainers are in place. Start the pumps, and sys-
tematically check each vent to ensure all air is bled from
the system.
6. Verify make-up water is available. Adjust make-up water
appropriately to replace the air that was bled from the
system. Pressure test and inspect the system for leaks and
make any necessary repairs. Check and adjust the water
and air level in the expansion tank.
4. Before making the final water connections, flush the sys-
tem as described in the Pre-Start-Up section of this
manual. After flushing the system, connect piping and
hoses to the proper supply, return and condensate connec-
tions of the unit.
NOTE: When necessary, use adapters to connect hoses.
5. Install any other system components, as required, follow-
ing manufacturer’s instructions.
6. Reinstall the front cabinet by carefully lowering the front
cabinet over the chassis onto the backplate.
Step 7 — Install Condensate Piping — Connect
the unit condensate drain to the building condensate drain with
5
a flexible, nonpressure-rated /8-in. (16 mm) ID plastic hose.
Avoid kinks in this hose to ensure an unobstructed flow of con-
densate from the unit to the drain.
The horizontal run of the condensate hose is usually too
short to pose any drainage problems, however, the horizontal
run of condensate line should be pitched at least 1 in. for every
10 ft of run (in the direction of flow). Avoid low points and un-
pitched piping since dirt collects in these areas and may cause
stoppage and overflow.
Field installation of a trap or vent is not required unless
specified by local codes. The 50PEC units are designed in a
blow-thru configuration. The condensate drain pan is located
on the outlet side of the blower so that the pressure in the drain
pan is higher than the atmospheric pressure.
7. Open a drain at the lowest point in the system. Adjust the
make-up water replacement rate to equal the rate of bleed.
Continue to bleed the system until the water appears
clean or for at least three hours, whichever is longest;
then, completely drain the system.
1/2” Flexible Hose
Brass Adapter
(1/2” MPT x 1/2”
Male Flare)
Supply Valve
Floor Line
Return Valve
NOTE: Use standard coupling (field-supplied)
and hose adapters to join 2 hoses.
Fig. 35 — Temporary Connection for Flushing System Piping
33
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8. Refill the system with clean, chemically treated water.
Since water varies for each locality, contact a local water
treatment company for the correct treatment chemicals to
use in the area. Set the boiler to raise the loop temperature
to approximately 85 F.
3. System Water pH: Verify system water is slightly alkaline
(pH = 7.5 to 8.5). Proper pH promotes the longevity of
the hoses and heat exchangers. See Table 9.
4. Closed-Type Cooling Tower (Open Tower with Heat Ex-
changer): Check equipment for proper temperature set
points and operation.
5. Balanced Water Flow Rate to Heat Pump: Record the
inlet and outlet water temperatures as each heat pump
unit is started. This check will eliminate nuisance unit
tripouts resulting from water velocities that are either too
low or too high; it can also prevent erosive water flow
rates.
.
CAUTION
To avoid possible damage to piping systems constructed of
plastic piping DO NOT allow loop temperature to exceed
110 F.
Circulate the solution for a minimum of 8 to 24 hours. At
the end of this period, shut off the circulating pump and
drain the solution. Repeat system cleaning as necessary.
9. When the cleaning process is complete, remove the short-
circuited hoses. Connect the hoses to the proper supply
and return connections on each unit. Refill the system and
bleed off all air.
10. Test the system pH with litmus paper. The system water
should be slightly alkaline (pH 7.0 to 8.5). Add chemi-
cals, as appropriate, to maintain acidity levels.
6. Standby Pump: Verify the standby pump is properly in-
stalled and in operating condition.
7. System Control: To ensure no catastrophic system fail-
ures occur, verify system controls are functioning and the
sequencing is correct.
8. Freeze Protection for Water Systems: Verify freeze
protection is provided for the outdoor portion of the loop
water system. Inadequate freeze protection leads to
expensive repairs.
CAUTION
CAUTION
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.
DO NOT use “Stop-Leak” or any similar chemical agent in
this system. Addition of these chemicals to the loop water
will foul the system and will inhibit unit operation.
11. When the system is successfully cleaned, flushed, refilled
and bled, check the main system panels, safety cutouts
and alarms. Set the controls to properly maintain loop
temperatures.
9. System Water Loop: Verify all air is bled from the sys-
tem. Air in the system impedes unit operation and causes
corrosion in the system piping.
System Checkout — When the installation is complete
and the system is cleaned and flushed, follow the system
checkout procedure outlined below.
1. Voltage: Ensure voltage is within the utilization range
specifications of the unit compressor and fan motor.
2. System Water Temperature: Ensure temperature is within
an acceptable range shown in Table 8. (When conducting
this check, also verify proper heating and cooling set
points.)
10. Unit Filters: To avoid system damage and to provide
maximum performance, ensure the unit filter is clean.
11. Unit Fans: Manually rotate fans to assure free rotation.
Ensure fans are properly secured to the fan shaft. Do not
oil fan motors on start-up since they are lubricated at the
factory.
12. System Control Center: To ensure control of the tempera-
ture set points for operation of the system’s heat rejector
and boiler, examine the system control and alarm panel
for proper installation and operation.
Table 8 — Air and Water Limits
50PEC UNIT
Min Ambient Air
Rated Ambient Air
Max Ambient Air
Min Entering Air
Rated Entering Air, dry bulb/wet bulb
Max Entering Air, dry bulb/wet bulb
Min Entering Water
Normal Entering Water
Max Entering Water
COOLING (F)
HEATING (F)
50
80
50
70
85
50
70
80
20
70
90
100
50
80/67
100/83
30
85
110
NOTES:
1. Minimum air and water conditions can only be used at nominal flow rates.
2. 50PEC units may have up to two values at maximum or minimum with all
other parameters at normal conditions.
3. Operating limits shown are for start-up, not continuous operation. It is
assumed that such a start-up is for the purpose of bringing the space to
desired occupancy temperature.
34
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Table 9 — Water Quality Guidelines
HX
MATERIAL*
CLOSED
RECIRCULATING†
CONDITION
OPEN LOOP AND RECIRCULATING WELL**
Scaling Potential — Primary Measurement
Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below.
pH/Calcium
Hardness Method
All
N/A
pH < 7.5 and Ca Hardness, <100 ppm
Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.)
Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use. A monitoring plan should be
implemented.
Ryznar Stability Index
6.0 - 7.5
If >7.5 minimize steel pipe use.
–0.5 to +0.5
All
N/A
Langelier Saturation Index
All
N/A
If <–0.5 minimize steel pipe use.
Based upon 150 F HWG and direct well, 85 F indirect well HX.
Iron Fouling
Iron Fe2+ (Ferrous)
<0.2 ppm (Ferrous)
If Fe2+ (ferrous) >0.2 ppm with pH 6 - 8, O2<5 ppm check for iron bacteria.
<0.5 ppm of Oxygen
All
All
N/A
N/A
(Bacterial Iron Potential)
Iron Fouling
Above this level deposition will occur.
Corrosion Prevention††
pH
6 - 8.5
Minimize steel pipe below 7 and no open tanks with pH <8.
<0.5 ppm
6 - 8.5
All
All
Monitor/treat as needed.
Hydrogen Sulfide (H2S)
At H2S>0.2 ppm, avoid use of copper and cupronickel piping of HXs.
Rotten egg smell appears at 0.5 ppm level.
Copper alloy (bronze or brass) cast components are okay to <0.5 ppm.
N/A
N/A
Ammonia Ion as Hydroxide,
Chloride, Nitrate and Sulfate
Compounds
<0.5 ppm
All
Maximum Chloride Levels
Maximum allowable at maximum water temperature.
50 F (10 C)
75 F (24 C)
100 F (38 C)
Copper
Cupronickel
304 SS
N/A
N/A
N/A
N/A
N/A
<20 ppm
<150 ppm
<400 ppm
<1000 ppm
>1000 ppm
NR
NR
<250 ppm
<550 ppm
>550 ppm
NR
NR
<150 ppm
<375 ppm
>375 ppm
316 SS
Titanium
Erosion and Clogging
Particulate Size and Erosion
<10 ppm of particles and a
maximum velocity of 6 fps.
Filtered for maximum
800 micron size.
<10 ppm (<1 ppm “sandfree” for reinjection) of particles and a maximum
velocity of 6 fps. Filtered for maximum 800 micron size. Any particulate that
is not removed can potentially clog components.
All
All
Brackish
Use cupronickel heat exchanger when concentrations of calcium or sodium
chloride are greater than 125 ppm are present. (Seawater is approximately
25,000 ppm.)
N/A
LEGEND
††If the concentration of these corrosives exceeds the maximum allow-
able level, then the potential for serious corrosion problems exists.
Sulfides in the water quickly oxidize when exposed to air, requiring that
no agitation occur as the sample is taken. Unless tested immediately
at the site, the sample will require stabilization with a few drops of one
Molar zinc acetate solution, allowing accurate sulfide determination up
to 24 hours after sampling. A low pH and high alkalinity cause system
problems, even when both values are within ranges shown. The term
pH refers to the acidity, basicity, or neutrality of the water supply.
Below 7.0, the water is considered to be acidic. Above 7.0, water is
considered to be basic. Neutral water contains a pH of 7.0.
HWG — Hot Water Generator
HX
—
—
Heat Exchanger
N/A
Design Limits Not Applicable Considering Recirculating
Potable Water
NR
SS
—
—
Application Not Recommended
Stainless Steel
*Heat exchanger materials considered are copper, cupronickel, 304 SS
(stainless steel), 316 SS, titanium.
†Closed recirculating system is identified by a closed pressurized piping
system.
To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is
equivalent to ppm.
**Recirculating open wells should observe the open recirculating design
considerations.
35
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compressor 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
master/slave applications. In master/slave applications, each
compressor and fan will stage according to its switch 2 setting.
If switch is set to Stage 2, the compressor will have a 3-second
delay before energizing during stage 2 demand.
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.
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 applica-
tions. In heat pump mode, Y1 used is for Compressor Stage 1,
Y2 is used for Compressor Stage 2, W1 is used for Heating
Stage 3 or emergency heat, and O/W2 is used for RV (heating
or cooling) depending upon switch 4 setting.
O/B Thermostat Type — Switch 4 provides selection for heat
pump O/B thermostats. O is cooling output. B is heating out-
put. Select ON for heat pumps with O output. Select OFF for
heat pumps with B output.
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.
Complete C Control Jumper Settings (See
Fig. 17, 18, and 21)
WATER COIL FREEZE PROTECTION (FP1) LIMIT
SETTING — Select jumper 3, (JW3-FP1 Low Temp) to
choose FP1 temperature limit of 10 F or 30 F. To select 30 F as
the temperature limit, DO NOT clip the jumper. To select 10 F
as the limit, clip the jumper.
ALARM RELAY SETTING — Select jumper 1 (JW1) for
connecting alarm relay terminal (AL2) to 24-vac (R) or to re-
main 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 Com-
plete C control has one DIP switch block with five switches.
See Fig. 17, 18, and 21.
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.
Switch 6 — Not used.
Boilerless Operation — Switch 7 provides selection of boiler-
less operation and works in conjunction with switch 8. In boil-
erless operation mode, only the compressor is used for heating
when FP1 is above the boilerless changeover temperature 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 select ON for set point of
40 F.
If switch 8 is set for 50 F, then the compressor will be used
for heating as long as the FP1 is above 50 F. The compressor
will not be used for heating when the FP1 is below 50 F and the
compressor will operate 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.
SWITCH 3 AND SWITCH 4 — Not used.
FREEZE PROTECTION (FP1) — DIP switch 5 is used to
initiate one or 3 tries for the FP1 fault. If there is water freeze
protection for the water coil then DIP switch 5 can be set to
lock out on the FP1 fault after one try. ON = One try.
OFF = 3 tries.
Deluxe D Control Jumper Settings (See Fig. 19,
20, and 22)
WATER COIL FREEZE PROTECTION (FP1) LIMIT
SETTING — Select jumper 3, (JW3-FP1 Low Temp) to
choose FP1 temperature limit of 10 F or 30 F. To select 30 F as
the temperature limit, DO NOT clip the jumper. To select 10 F
as the limit, clip the jumper.
ALARM RELAY SETTING — Select jumper 4 (JW4-AL2
Dry) for connecting alarm relay terminal (AL2) to 24-vac (R)
or to remain as a dry contact (no connection). To connect AL2
to R, do not clip the jumper. To set as dry contact, clip the
jumper.
LOW PRESSURE SETTING — The Deluxe D control can
be configured for low pressure setting (LP). Select jumper 1
(JW1-LP Norm Open) for choosing between low pressure in-
put normally opened or closed. To configure for normally
closed operation, do not clip the jumper. To configure for nor-
mally open operation, clip the jumper.
DIP SWITCH BLOCK 2 (S2) — The following set of DIP
switches is used to configure accessory relay options.
Switches 1 to 3 — These DIP switches provide selection of
Accessory 1 relay options. See Table 10 for DIP switch
combinations.
Table 10 — DIP Switch Block S2 —
Accessory 1 Relay Options
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.
See Fig. 19, 20, and 22.
DIP SWITCH BLOCK 1 (S1) — This set of switches offers
the following options for Deluxe D control configuration:
DIP SWITCH POSITION
ACCESSORY 1
RELAY OPTIONS
1
2
3
Digital NSB
Water Valve — Slow Opening
Off
On
On
Off
On
On
LEGEND
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.
Compressor Relay Staging Operation — Switch 2 will en-
able or disable compressor relay staging operation. The
NSB
—
Night Setback
NOTE: All other DIP switch combinations are invalid.
Switches 4 to 6 — These DIP switches provide selection of
Accessory 2 relay options. See Table 11 for DIP switch
combinations.
36
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Table 11 — DIP Switch Block S2 —
Accessory 2 Relay Options
(i.e., approximately 50 to 80 F dry bulb). Loop water tem-
perature entering the heat pumps should be at least 40 F
but not in excess of 110 F. Refer to Table 8 for more spe-
cific information on the operating parameters of units.
DIP SWITCH POSITION
ACCESSORY 2
RELAY OPTIONS
4
5
6
Digital NSB
Water Valve — Slow Opening
Off
On
On
Off
On
On
IMPORTANT: Three factors determine the operating limits
of a unit: (1) return-air temperature, (2) water temperature
and (3) ambient temperature. Whenever any one of these
factors is at a minimum or maximum level, the other two
factors must be at normal levels to ensure proper unit oper-
ation. Flow rates must be at nominal ARI (Air Condition-
ing and Refrigeration Institute)/ISO (International
Organization for Standardization)/ ASHRAE (American
Society of Heating, Refrigerating and Air Conditioning
Engineers) 13256-1 standards.
LEGEND
NSB — Night Setback
NOTE: All other switch combinations are invalid.
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.
Unit Start-Up/Cooling
1. Turn the unit thermostat to the cooling position and turn
the fan speed switch to “HI.” If the unit has an optional
MCO thermostat, set the selector switch to Cool. Both the
fan and compressor should run.
2. Check for cool air delivery at unit grille 15 minutes after
the unit has begun operating. List the identification num-
ber of any machines that do not function at this time.
3. Check the elevation and cleanliness of the condensate
lines; any dripping could be a sign of a blocked line.
4. Select low fan speed. Airflow should decrease and com-
pressor should operate.
Switch 8 — Not used.
Deluxe D Control Accessory Relay Configura-
tions — The following accessory relay settings are applica-
ble for Deluxe D control only:
CYCLE WITH COMPRESSOR — In this configuration, the
relay will be ON any time the compressor relay is on.
DIGITAL NIGHT SETBACK (NSB) — In this configura-
tion, the relay will be ON if the NSB input is connected to
ground C.
NOTE: If there are no relays configured for digital NSB, then
the NSB and OVR (override) inputs are automatically config-
ured for mechanical operation.
MECHANICAL NIGHT SETBACK — When NSB input is
connected to ground C, all thermostat inputs are ignored. A
thermostat setback 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.
5. Slowly turn thermostat toward warmer position. Both fan
and compressor should shut off when thermostat set point
equals room temperature. Room temperature must be
below 90 F for unit to shut off.
6. Operate each heat pump in the heating cycle immediately
after checking cooling cycle operation. A time delay will
prevent the compressor from re-starting for approximate-
ly 5 minutes.
Operating Limits
WATER VALVE (SLOW OPENING) — If relay is config-
ured for water valve (slow opening), the relay will start 60 sec-
onds prior to starting compressor relay.
ENVIRONMENT — This equipment is designed for indoor
installation ONLY.
POWER SUPPLY — A voltage variation of ± 10% of name-
plate utilization voltage is acceptable.
CAUTION
50PEC UNIT STARTING CONDITIONS — The 50PEC
units will start and operate at an ambient temperature of 50 F
with entering-air temperature at 50 F, entering water at 60 F,
and with both air and water at the flow rates used in the
ARI/ISO/ASHRAE Standard 13256-1 rating test, for initial
start-up in winter.
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.
IMPORTANT: These operating limits are not normal or
continuous operating conditions. It is assumed that such a
start-up is for the purpose of bringing the building space up
to occupancy temperature.
START-UP
Use the procedure outlined below to initiate proper unit
start-up:
Unit Start-Up/Heating
IMPORTANT: This equipment is designed for indoor
installation ONLY.
1. Adjust the unit thermostat to the warmest setting and turn
the fan speed switch to “HI.” If the unit has an optional
MCO thermostat, set the selector switch to Heat. The
blower should start immediately and after the time delay
is complete, the compressor will start.
WARNING
2. Once the unit has begun to run, check for warm air delivery
at the unit grille. Again, the installing contractor must list
the serial number of any machine that does not function.
When the disconnect switch is closed, high voltage is
present in some areas of the electrical panel. Exercise cau-
tion when working with the energized equipment.
3. Log the unit operating conditions at initial start-up for
each unit to establish a permanent operating record.
4. Select low fan speed. Airflow should decrease and com-
pressor should continue to operate.
1. Adjust all valves to the full open position and turn on the
line power to all heat pump units.
2. Operate each unit in the Cooling mode first.
Room temperature should be in the normal range
37
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5. Slowly turn thermostat toward cooler position. Both fan
and compressor should shut off when thermostat set point
equals room temperature. Room temperature must be
above 65 F for unit to shut off.
c. Scroll to day, month and year using arrow keys.
Use number keypad to set date.
5. To set Daylight Savings Time (DST):
a. Push the DST softkey. The display will indicate
02:00:060 which is equal to 2:00AM.
b. To program the beginning and end dates, scroll
down to the beginning month and press the enter
key. The softkeys (INCR and DECR) will activate
to increment the month in either direction, Jan,
Feb, March, etc.
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. 36.
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.
To start-up a unit with WSHP Open controls:
• 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."
• The condenser water limit needs to be verified
depending on design parameters and application,
whether geothermal or boiler/tower.
1. To plug in the BACview6 handheld display into a SPT
sensor, point the two ears on the connector up and tilt the
bottom of the plug toward you. Insert the plug up into the
SPT sensor while pushing the bottom of the plug away
from you.
2. BACview6 should respond with "Establishing Connec-
tion." The Home screen will then appear on the display
showing operating mode and space temperature. Press
any button to continue.
7. To view unit configuration settings:
a. Select the Unit Configuration softkey, then select
Unit.
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.
b. Scroll through the unit settings by using the up and
down arrow keys. Unit settings include:
• Fan Mode: Default Continuous
3. When the Login is requested, type 1111 and push the OK
softkey. The Logout will then be displayed to indicate the
password was accepted.
• Fan Delay:
• Minimum SAT Cooling: Default 50 F
• Maximum SAT Heating: Default 110 F
• Filter Service Alarm: Must be set from 0 to 9999 hr
4. To set the Clock if it is not already displayed:
a. Select System Settings from the Home screen, then
press Clockset.
b. Scroll to hour, minute and second using the arrow
keys. Use the number keypad to set actual time.
8. To set local schedules:
a. Select the Schedule softkey from the Configuration
screen, then press enter.
a50-8444
Fig. 36 — BACview6 Display Interface
*Sponsored by ASHRAE (American Society of Heating, Refrigerat-
ing and Air Conditioning Engineers).
38
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b. Select Weekly, then press enter (7 schedules
available).
applying some back pressure. To accomplish this, slightly close
the leaving isolation valve of the water regulating device.
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.
CAUTION
DO NOT use “Stop Leak” or any similar chemical agent in
this system. Addition of these chemicals to the loop water
will foul the system and inhibit unit operation.
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 pro-
tection should be at 15 F (30 F –15 F) = 15 F.
g. Continue to add the same or different schedule spe-
cific days of the week.
To add exceptions to the schedule:
i. Press Add softkey.
ii. Select exception type from following:
• Date
• Date Range
• Week-N-Day
• Calender Reference
9. Go back to Home Screen.
IMPORTANT: All alcohols should be pre-mixed and
pumped from a reservoir outside of the building or intro-
duced under water level to prevent alcohols from fuming.
10. Remove BACview6 cable from SPT sensor by reversing
the process in Step 1.
11. Perform system test.
Calculate the total volume of fluid in the piping system. See
Table 13. Use the percentage by volume in Table 14 to deter-
mine the amount of antifreeze to use. Antifreeze concentration
should be checked from a well mixed sample using a hydrome-
ter to measure specific gravity.
FREEZE PROTECTION SELECTION — The 30 F FP1 fac-
tory setting (water) should be used to avoid freeze damage to
the unit.
Flow Regulation — Flow regulation can be accom-
plished by two methods. Most water control valves have a
built-in flow adjustment valve. Determine the flow rate by
measuring the pressure drop through the unit heat exchanger.
See Table 12. Adjust the water control valve until a flow of 1.5
to 2 gpm per ton cooling is achieved. Since the pressure
constantly varies, two pressure gages may be needed.
An alternative method for regulating flow is to install a flow
control device. These devices are typically an orifice of plastic
material mounted on the outlet of the water control valve,
designed to allow a specified flow rate. Occasionally these
valves produce a velocity noise that can be reduced by
Once antifreeze is selected, the JW3 jumper (FP1) should
be clipped on the control to select the low temperature
(antifreeze 10 F) set point to avoid nuisance faults.
Table 12 — Coaxial Water Pressure Drop
PRESSURE DROP (ft wg)
30 F
50 F
70 F
90 F
UNIT
FLOW
Without
Motorized
Valve
Without
Motorized
Valve
Without
Motorized
Valve
Without
Motorized
Valve
50PEC (GPM)
With Cv = 2.9
MOPD = 125 psi
With Cv = 2.9
MOPD = 125 psi
With Cv = 2.9
MOPD = 125 psi
With Cv = 2.9
MOPD = 125 psi
1.3
1.8
3.2
5.0
1.8
3.3
5.3
1.2
2.6
4.2
2.1
4.2
6.8
2.0
3.6
5.8
1.3
2.5
3.9
1.6
2.9
4.5
1.2
2.2
3.5
2.0
3.7
6.0
1.5
2.9
4.6
1.2
2.2
3.5
1.4
2.6
4.1
1.1
2.0
3.2
1.8
3.3
5.5
1.3
2.7
4.2
6.5
11.4
19.6
1.5
2.9
4.8
2.4
4.9
8.2
1.0
2.0
3.0
1.3
2.3
3.7
1.0
1.9
3.0
1.6
3.0
4.9
1.2
2.4
3.8
6.5
11.4
19.6
1.4
2.7
4.5
2.3
4.6
7.7
09
12
15
18
1.9
2.5
1.6
2.3
3.1
1.8
2.7
3.6
2.4
3.6
4.8
6.5
6.5
11.4
19.6
1.6
3.4
5.7
2.8
5.8
9.6
11.4
19.6
1.6
3.1
5.0
2.6
5.2
8.8
LEGEND
Cv
— Flow Coefficient
MOPD — Maximum Operating Pressure Differential
39
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Table 13 — Approximate Fluid Volume (gal)
per 100 ft of Pipe
or the W terminal is disregarded. The compressor relay will re-
main on and EH1 (emergency heat) is immediately turned on.
EH2 will turn on after 10 minutes of continual Stage 2 demand.
PIPE
DIAMETER (in.)
VOLUME (gal.)
NOTE: EH2 will not turn on (or if on, will turn off) if FP1
(freeze protection) temperature is greater than 45 F and FP2 is
greater than 110 F.
EMERGENCY HEAT — In Emergency Heat (EH) 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 continuous
emergency heat demand.
Copper
1
4.1
6.4
9.2
1.25
1.5
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
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.
IPS
—
—
—
Internal Pipe Size
Schedule
SCH
SDR
Standard Dimensional Ratio
NOTE: Volume of heat exchanger is approximately 1.0 gallon.
Table 14 — Antifreeze Percentages by Volume
MINIMUM TEMPERATURE FOR FREEZE
PROTECTION (F)
ANTIFREEZE
10
25
15
21
20
16
25
10
HEATING STAGE 1 — In Heating Stage 1 mode, the fan en-
able and compressor relays are turned on immediately. Once
the demand is removed, the relays are turned off and the con-
trol 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 en-
able and compressor relays remain on. The fan speed relay is
turned on immediately and turned off immediately once the de-
mand 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 operate per their
associated DIP switch 2 setting on S1.
HEATING STAGE 3 — In Heating Stage 3 mode, the fan en-
able, fan speed and compressor relays remain on. The EH1 out-
put is turned on immediately. With continuing Heat Stage 3 de-
mand, 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’s temperature 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.
EMERGENCY HEAT — In Emergency Heat mode, the fan
enable and fan speed relays are turned on. The EH1 output is
turned on immediately. With continuing emergency heat de-
mand, EH2 will turn on after 5 minutes. Fan enable and fan
speed relays are turned off after a 60-second delay. The control
reverts to Standby mode.
Methanol (%)
100% USP Food Grade
Propylene Glycol (%)
38
30
22
15
Cooling Tower/Boiler Systems — These systems
typically use a common loop 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 continuously,
chemical treatment and filtering will be necessary.
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems — These systems al-
low water temperatures from 30 to 110 F. The external loop
field is divided up into 2 in. polyethylene supply and return
lines. Each line has valves connected in such a way that upon
system start-up, each line can be isolated for flushing using only
the system pumps. Air separation should be located in the pip-
ing system prior to the fluid re-entering the loop field.
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
delay upon power up.
Units with Aquazone™ Complete C Control
STANDBY — The Y and W terminals are not active in Stand-
by mode, however the O and G terminals may be active, de-
pending on the application. The compressor will be off.
COOLING — The Y and O terminals are active in Cooling
mode. After power up, the first call to the compressor will ini-
tiate a 5 to 80-second random start delay and a 5-minute anti-
short cycle protection time delay. After both delays are com-
plete, 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.
Output EH1, EH2, fan enable, and fan speed will be ON if
the G input is not active during Emergency Heat mode.
COOLING STAGE 1 — In Cooling Stage 1 mode, the fan
enable, compressor and RV relays are turned on immediately.
If configured as stage 2 (DIP switch set to OFF) then the com-
pressor and fan will not turn on until there is a stage 2 demand.
The fan enable and compressor relays are turned off immedi-
ately when the Cooling Stage 1 demand is removed. The con-
trol 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.
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 active
COOLING STAGE 2 — In Cooling Stage 2 mode, the fan
enable, compressor and RV relays remain on. The fan speed re-
lay is turned on immediately and turned off once the Cooling
Stage 2 demand is removed. The control reverts to Cooling
Stage 1 mode. If there is a master/slave or dual compressor
40
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application, all compressor relays and related functions will
track with their associated DIP switch on S1.
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:
2
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.
• 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.
• 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.
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:
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.
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.
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:
• Cooling is set to Enable.
• Heating mode is not active and the compressor time
guard has expired.
• Condensate overflow input is normal.
• If occupied, the SPT is greater than the occupied cooling
set point.
• Space temperature reading is valid.
• If unoccupied, the SPT is greater than the unoccupied
cooling set point.
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.
Schedule_schedule — The unit will operate according to the
schedule configured and stored in the unit. The schedule is
accessible via the BACview6 Handheld tool, i-Vu Open, or
Field Assistant control system. The daily schedule consists of a
start/stop time (standard or 24-hour mode) and seven days of
the week, starting with Monday and ending on Sunday. To
enter a daily schedule, navigate to Config, then Sched, then
enter BACview6 Admin Password (1111), then go to
schedule_schedule. From here, enter either a Weekly or Excep-
tion schedule for the unit.
Occupancy Input Contact — The WSHP Open controller has
the capability to use an external dry contact closure to deter-
mine the occupancy status of the unit. The Occupancy Sched-
ules will need to be disabled in order to utilize the occupancy
contact input.
NOTE: Scheduling can only be controlled from one source.
• If economizer cooling is available and active and the
economizer alone is insufficient to provide enough cool-
ing.
• OAT (if available) is greater than the cooling lockout
temperature.
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.
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
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
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maximum speed. If the SAT continues to fall 5F below the
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 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 con-
trolled so the SAT will not exceed the maximum heating SAT
limit.
minimum 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 sup-
ply-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:
• Heating is set to Enable.
• Cooling mode is not active and the compressor time
guard has expired.
• Condensate overflow input is normal.
• If occupied, the SPT is less than the occupied heating set
point.
• Space temperature reading is valid.
• If unoccupied, the SPT is less than the unoccupied heat-
ing set point.
• OAT (if available) is less than the heating lockout
temperature.
If all the above conditions are met, the heating outputs will
be energized as required, otherwise they will be deenergized. If
the heating is active and should the SAT approach the maxi-
mum SAT limit, the fan will be indexed to the next higher
speed. Should this be insufficient, and the SAT rises further
reaching the maximum heating SAT limit, the fan will be
indexed to the maximum speed. If the SAT still continues to
rise 5F above the maximum limit, all heating stages will be
disabled.
During Heating mode, the reversing valve output will be
held in the heating position (either B or O type as configured)
even after the compressor is stopped. The valve will not switch
position until the Cooling mode is required.
The configuration screens contain the maximum SAT
parameter as well as heating lockout based on outdoor-air
temperature (OAT); both can be adjusted to meet various
specifications.
There is a 5-minute off time for the compressor as well as a
5-minute time delay when staging up to allow the SAT to
achieve a stable temperature before energizing a second stage
of capacity. Likewise, a 45-second delay is used when staging
down.
Two-Position Hot Water/Steam Heating Reheat — The con-
trol can operate a two-position, NO or NC, hot water or steam
valve connected to a coil on the discharge side of the unit and
supplied by a boiler in order to maintain the desired heating set
point should the compressor capacity be insufficient or a com-
pressor failure occurs. Unless a compressor fault condition ex-
ists, the valve will only open to supplement the heat provided
by the compressor if the space temperature falls more than one
degree below the desired heating set point. The valve will be
controlled so the SAT will not exceed the maximum heating
SAT limit. The heat stage will also be subject to a 2-minute
minimum OFF time to prevent excessive valve cycling.
Single Stage Electric Auxiliary Heat — The control can op-
erate a field-installed single stage of electric heat installed on
the discharge side of the unit in order to maintain the desired
heating set point should the compressor capacity be insufficient
or a compressor failure occurs. Unless a compressor fault con-
dition exists, the heat stage will only operate to supplement the
heat provided by the compressor if the space temperature falls
more than one degree below the desired heating set point. The
heat stage will be controlled so the SAT will not exceed the
maximum heating SAT limit. The heat stage will also be sub-
ject 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
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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:
• 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:
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
operate if the loop pump status is off and therefore the WSHP
compressor will not run.
• SAT reading is available.
• LWT reading is available.
• If occupied, the SPT is greater than the occupied cooling
set point or less than the occupied heating set point and
the condenser water is suitable.
• Space temperature reading is valid.
• If unoccupied, the SPT is greater than the unoccupied
cooling set point or less than the unoccupied heating set
point and the condenser water is suitable.
Modulating Water Economizer Control — The control has
the capability to modulate a water valve to control condenser
water flowing through a coil on the entering air side of the unit.
Cooling — The purpose is to provide an economizer cooling
function by using the water loop when the entering water loop
temperature is suitable (at least 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,
or should a high humidity condition occur, then the compressor
will also be started to satisfy the load. Should the SAT ap-
proach the minimum cooling SAT limit, the economizer valve
will modulate closed during compressor operation.
COMPLETE C AND DELUXE D BOARD
SYSTEM TEST
Heating — Additionally, the control will modulate the water
valve should the entering water loop temperature be suitable
for heating (at least 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.
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 reduced
by a factor of 15.
Test Mode — To enter Test mode on Complete C or
Deluxe D controls, cycle the power 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 15-17. To
exit Test mode, short the terminals for 3 seconds or cycle the
power 3 times within 60 seconds.
NOTE: The Deluxe D control has a flashing code and alarm
relay cycling code that will both have the same numerical
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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.
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.
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.
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 thermostat in-
put 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.
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.
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.
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.
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
always flash a code representing the last fault in memory. If
there is no fault in memory, the fault LED will flash code 1 and
appear as 1 fast flash alternating with a 10-second pause. See
Table 17.
PREPOSITION OA DAMPER — Prepositions OA damper
actuator to set proper preload.
Table 15 — Complete C Control Current LED Status and Alarm Relay Operations
LED STATUS
DESCRIPTION OF OPERATION
ALARM RELAY
Open
Normal Mode
On
Off
Normal Mode with PM Warning
Complete C Control is non-functional
Fault Retry
Cycle (Closed 5 sec, Open 25 sec)
Open
Open
Slow Flash
Over/Under Voltage Shutdown
Lockout
Open (Closed after 15 minutes)
Closed
Fast Flash
Flashing Code 1
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
Flashing Code 7
Flashing Code 8
Flashing Code 9
Test Mode — No fault in memory
Test Mode — HP Fault in memory
Test Mode — LP Fault in memory
Test Mode — FP1 Fault in memory
Test Mode — FP2 Fault in memory
Test Mode — CO Fault in memory
Test Mode — Over/Under shutdown in memory
Test Mode — PM in memory
Cycling Code 1
Cycling Code 2
Cycling Code 3
Cycling Code 4
Cycling Code 5
Cycling Code 6
Cycling Code 7
Cycling Code 8
Cycling Code 9
Test Mode — FP1/FP2 swapped fault in memory
LEGEND
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.
CO
FP
HP
—
—
—
Condensate Overflow
Freeze Protection
High Pressure
LED
LP
PM
—
—
—
Light-Emitting Diode
Low Pressure
Performance Monitor
Table 16 — Complete C Control LED Code and Fault Descriptions
LED CODE
FAULT
No fault in memory
DESCRIPTION
There has been no fault since the last power-off to power-on sequence
HP open instantly
1
2
3
4
5
6
High-Pressure Switch
Low-Pressure Switch
LP open for 30 continuous seconds before or during a call (bypassed for first 60 seconds)
FP1 below temp limit for 30 continuous seconds (bypassed for first 60 seconds of operation)
FP2 below temp limit for 30 continuous seconds (bypassed for first 60 seconds of operation)
Sensor overflow (grounded) for 30 continuous seconds
Freeze Protection Coax — FP1
Freeze Protection Air Coil — FP2
Condensate overflow
7 (Autoreset)
8
9
Over/Under Voltage Shutdown
PM Warning
"R" power supply is <19-vac or >30-vac
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
High Pressure
Light-Emitting Diode
LP
PM
—
—
Low Pressure
Performance Monitor
HP
LED
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Table 17 — Aquazone™ Deluxe D Control Current LED Status and Alarm Relay Operations
STATUS LED
(Green)
TEST LED
(Yellow)
Off
DESCRIPTION
Normal Mode
Normal Mode with PM
D Control is non-functional
Test Mode
Night Setback
ESD
Invalid T-stat Inputs
No Fault in Memory
HP Fault
LP Fault
FP1 Fault
FP2 Fault
CO Fault
Over/Under Voltage
HP Lockout
LP Lockout
FP1 Lockout
FP2 Lockout
CO Lockout
FAULT LED (Red)
ALARM RELAY
On
On
Off
—
Flash Last Fault Code in Memory
Flashing Code 8
Open
Off
Off
On
—
Cycle (closed 5 sec, open 25 sec, …)
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
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
Flashing Code 3
Open
Flashing Code 4
Open
Flashing Code 5
Open
Flashing Code 6
Open
Flashing Code 7
Open (closed after 15 minutes)
Flashing Code 2
Closed
Closed
Closed
Closed
Closed
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
LEGEND
Condensate Overflow
Emergency Shutdown
Freeze Protection
High Pressure
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
—
—
—
—
LED
LP
PM
—
—
—
Light-Emitting Diode
Low Pressure
Performance Monitor
4. Fast flash is 2 flashes every 1 second.
HP
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.
exchanger should be kept 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 and 40 psig during the winter.
SERVICE
Perform the procedures outlined below periodically, as
indicated.
WARNING
Check P trap frequently for proper operation.
To prevent injury or death due to electrical shock or contact
with moving parts, open unit disconnect switch before ser-
vicing unit.
FILTERS — Inspect filters. Establish a regular maintenance
schedule. Clean or replace filters frequently depending on
need.
To remove the filter from the 50PEC unit, slide the filter out
of its frame located in the return air opening at the bottom front
of the unit. When re-installing the filter, use the slide-in rails of
the filter frame to guide the filter into the proper position.
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.
CAUTION
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.
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: To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this unit must only be
serviced by technicians who meet local, state and federal
proficiency requirements.
Refrigerant System — Verify air and water flow rates
are at proper levels before servicing. To maintain sealed circuit-
ry integrity, do not install service gages unless unit operation
appears abnormal.
Condenser Cleaning — Water-cooled condensers may
require cleaning of scale (water deposits) due to improperly
maintained closed-loop water systems. Open water tower
systems may require removal of sludge build-up due to
induced contaminants.
Unit Inspection — Visually inspect the unit at least once
a month. Pay special attention to hose assemblies. Repair any
leaks and replace deteriorated hoses immediately. Note any
signs of deterioration or cracking.
System Flushing — Properly clean and flush system
periodically. Refer to Pre-Start-Up, System Cleaning and
Flushing section.
Local water conditions may cause excessive fouling or
pitting of tubes. Therefore, condenser tubes should be cleaned
at least once a year, or more often if the water is contaminated.
Use standard coil cleaning procedures which are compatible
with both the heat exchanger material and copper water lines.
Generally, the more water flowing through the unit, the less
chance for scaling, however flow rates over 3 gpm per ton can
Water Coil — Keep air out of the water coil. Check open
loop systems to be sure the well head is not allowing air to in-
filtrate the water line. Always keep lines airtight.
Inspect heat exchangers regularly and clean more frequently
if the unit is located in a “dirty” environment. The heat
45
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produce water (or debris) velocities that can erode the heat ex-
changer wall and ultimately produce leaks.
Proper water treatment can minimize tube fouling and
pitting. If such conditions are anticipated, water treatment anal-
ysis is recommended. Refer to the Carrier System Design Man-
ual, Part 5, for general water conditioning information.
GAS VENT
PUMP
PRIMING
CONN.
GLOBE
VALVES
SUCTION
SUPPLY
PUMP
SUPPORT
1” PIPE
CAUTION
CONDENSER
Follow all safety codes. Wear safety glasses and rubber
gloves when using inhibited hydrochloric acid solution.
Observe and follow acid manufacturer’s instructions.
TANK
REMOVE WATER
REGULATING VALVE
Clean condensers with an inhibited hydrochloric acid solu-
tion. The acid can stain hands and clothing, damage concrete,
and, without inhibitor, damage steel. Cover surroundings to
guard against splashing. Vapors from vent pipe are not harmful,
but take care to prevent liquid from being carried over by the
gases.
RETURN
FINE MESH
SCREEN
Fig. 38 — Forced Circulation Method
Condensate Pans — Check condensate drain pans for
algae growth every three months. If algae growth is apparent,
consult a water treatment specialist for proper chemical treat-
ment. The application of an algaecide every three months will
typically eliminate algae problems in most locations. Check
condensate hose for leaks and blockage and correct any
problems.
Warm solution acts faster, but cold solution is just as effec-
tive if applied for a longer period.
GRAVITY FLOW METHOD — Do not add solution faster
than vent can exhaust the generated gases.
When condenser is full, allow solution to remain overnight,
then drain condenser and flush with clean water. Follow acid
manufacturer’s instructions. See Fig. 37.
Blower Motors — All units have lubricated fan motors.
BLOWER MOTORS SHOULD NEVER BE LUBRICATED
UNLESS OBVIOUS, DRY OPERATION IS SUSPECTED.
Periodic maintenance oiling is not recommended because it
will result in dirt accumulating on excess oil and cause eventu-
al motor failure. Conduct annual dry operation check and am-
perage check to ensure amp draw is no more than 10% greater
than that indicated by serial plate data.
FILL CONDENSER WITH
CLEANING SOLUTION. DO
PAIL
NOT ADD SOLUTION
MORE RAPIDLY THAN
VENT CAN EXHAUST
GASES CAUSED BY
FUNNEL
CHEMICAL ACTION.
1”
Compressor — Conduct an amperage check annually on
the compressor and fan motor. Amperage draw should not
exceed normal full load amps. Maintain a log of amperage to
detect deterioration prior to component failure.
PIPE
VENT
PIPE
5’ APPROX
Safety Control Reset — The 50PEC heat pumps are
furnished with high-pressure, low-pressure and low-
temperature cutouts to prevent the machine from operating at
abnormal conditions of temperature or water flow.
3’ TO 4’
CONDENSER
The contacts of the high-pressure control used on 50PEC
units are designed to open at 376 psig and automatically
re-close at 304 psig. The Complete C or Deluxe D control
monitors this and other functions such as refrigerant tempera-
tures and pressures and condensate overflow and will interrupt
unit heating or cooling operation.
PAIL
The machine must be reset manually. Reset is accomplished
by pressing the STOP button and then pushing either HI HEAT,
LOW HEAT, HI COOL or LO COOL to restart the unit in the
desired mode of operation. (The 50PEC unit can also be reset
by opening and closing the supply power disconnect switch.)
Fig. 37 — 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. 38.
Regulate flow to condenser with a supply line valve. If
pump is a nonoverloading type, the valve may be fully closed
while pump is running.
For average scale deposit, allow solution to remain in con-
denser overnight. For heavy scale deposit, allow 24 hours.
Drain condenser and flush with clean water. Follow acid manu-
facturer’s instructions.
IMPORTANT: If the unit must be reset more than twice,
check the unit for a dirty filter, abnormal entering water
temperature, inadequate or excessive water flow, and inter-
nal malfunctions. If the unit continues to cut out, contact a
trained service technician.
WARNING
When replacing the compressor contactor or lockout relay
in a unit with electromechanical controls, use only Carrier
factory authorized parts. Substitution of other components
may result in an inoperative safety circuit and may cause a
hazardous condition.
46
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Checking System Charge — Units are shipped with
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.
full operating charge. If recharging is necessary:
1. Insert thermometer bulb in insulating rubber sleeve on
liquid line near filter drier. Use a digital thermometer for
all temperature measurements. DO NOT use a mercury
or dial-type thermometer.
2. Connect pressure gage to discharge line near compressor.
1. Remove the battery from the controller, making note of
the battery's polarity.
3. After unit conditions have stabilized, read head pressure
on discharge line gage.
2. Insert the new battery, matching the battery's polarity
with the polarity indicated on the WSHP Open controller.
NOTE: Operate unit a minimum of 15 minutes before
checking charge. From standard field-supplied Pressure-
Temperature chart for R-410A, find equivalent saturated
condensing temperature.
TROUBLESHOOTING
4. Read liquid line temperature on thermometer, then
subtract from bubble point temperature. The difference
equals subcooling temperature.
When troubleshooting problems with a WSHP, consider the
following and refer to Table 18.
Thermistor — A thermistor may be required for single-
phase units where starting the unit is a problem due to low
voltage.
Refrigerant Charging
WARNING
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 prevent personal injury, wear safety glasses and gloves
when handling refrigerant. Do not overcharge system —
this can cause compressor flooding.
To view the alarms:
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.
NOTE: Do not vent or depressurize unit refrigerant to atmo-
sphere. Remove and recover refrigerant following accepted
practices.
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.
Air Coil Fan Motor Removal
CAUTION
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.
Before attempting to remove fan motors or motor mounts,
place a piece of plywood over evaporator coils to prevent
coil damage.
3. To view alarms which have been corrected, scroll down
through the Alarm screen to Return Top Normal screen.
Motor power wires need to be disconnected from motor
terminals before motor is removed from unit.
NOTE: Alarms are automatically reset once alarm con-
dition has been corrected.
1. Shut off unit main power supply.
See Table 18 for possible alarm cause and solution.
2. Loosen bolts on mounting bracket so that fan belt can be
removed.
3. Loosen and remove the 2 motor mounting bracket bolts
on left side of bracket.
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.
47
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Table 18 — 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.
HP Fault — Code 2
High Pressure
X
X
Reduced or no water flow in Check pump operation or valve operation/setting.
cooling
Check water flow adjust to proper flow rate.
Water temperature out of
range in cooling
Bring water temperature within design parameters.
X
X
Reduced or no airflow in
heating
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Dirty air coil — construction dust, etc. Perform preventative mainte-
nance; Clean air coil.
High external static. Check duct design and downstream interference.
Air temperature out of range Bring return-air temperature within design parameters.
in heating
X
X
X
X
X
X
X
Overcharged with refrigerant Check superheat/subcooling vs. typical operating condition.
Bad HP switch
Insufficient charge
Check switch continuity and operation. Replace.
Check for refrigerant leaks.
LP Fault — Code 3
Low Pressure/Loss of
Charge
Compressor pump down at Check charge and start-up water flow.
start-up
FP1 Fault — Code 4
Water Freeze Protection
X
Reduced or no water flow in Check pump operation or water valve operation/setting.
heating
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.
X
X
Inadequate antifreeze level Check antifreeze density with hydrometer.
Improper freeze protect set- Clip JW3 jumper for antifreeze (10 F) use.
ting (10 F vs. 30 F)
X
X
Water temperature out of
range
Bad thermistor
Reduced or no airflow in
cooling
Bring water temperature within design parameters.
X
X
Check temperature and impedance correlation.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
High external static. Check duct design and downstream interference.
FP2 Fault — Code 5
Air Coil Freeze
Protection
X
X
Air temperature out of range Too much cold vent air. Bring entering-air temperature within design
parameters.
Improper freeze protect set- Normal airside applications will require 30 F only.
ting (10 F vs. 30 F)
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.
Check trap dimensions and location ahead of vent.
Check for piping slope away from unit.
Condensate Fault —
Code 6
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.
Check power supply and 24-vac voltage before and during operation.
Check power supply wire size.
Over/Under Voltage —
Code 7
(Auto Resetting)
X
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.
Check for poor water flow or airflow.
X
X
X
X
Over voltage
Performance Monitor —
Code 8
Heating mode FP2>125 F
Cooling mode FP1>125 F
OR FP2< 40 F
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
Compressor overload
Control board
Dirty air filter
Unit in Test mode
Unit selection
Compressor overload
Thermostat position
Unit locked out
Check and replace if necessary.
Reset power and check operation.
Check and clean air filter.
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.
Ensure thermostat set for heating or cooling operation.
Check for lockout codes. Reset power.
Check compressor overload. Replace if necessary.
Check Y and W wiring at heat pump. Jumper Y and R for compressor
operation in Test mode.
Only Fan Runs
Compressor overload
Thermostat wiring
LEGEND
FP — Freeze Protection
HP — High Pressure
LED — Light-Emitting Diode
LP — Low Pressure
RV — Reversing Valve
48
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Table 18 — 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
operation in Test mode.
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.
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
Fan motor relay
X
X
Fan motor
Reversing valve
Unit Does Not Operate in
Cooling
X
X
X
Thermostat setup
Thermostat wiring
Dirty filter
Reduced or no airflow in
heating
Check for ‘O’ RV setup not ‘B’.
Check O wiring at heat pump. Jumper O and R for RV coil.
Replace or clean.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
High external static. Check duct design and downstream interference.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
High external static. Check duct design and downstream interference.
Insufficient Capacity/
Not Cooling or Heating
Properly
X
X
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
Restricted metering device Check superheat and subcooling. Replace.
Defective reversing valve
Thermostat improperly
located
Check superheat and subcooling.
Perform RV touch test.
Check location and for air drafts behind thermostat.
X
X
X
X
X
X
Unit undersized
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
Perform scaling check and clean if necessary.
Scaling in water heat
exchanger
Inlet water too hot or cold
Reduced or no airflow in
heating
X
X
Check load, loop sizing, loop backfill, ground moisture.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
High external static. Check duct design and downstream interference.
High Head Pressure
X
X
Reduced or no water flow in Check pump operation or valve operation/setting.
cooling
Check water flow adjust to proper flow rate.
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
Perform scaling check and clean if necessary.
X
X
X
X
Unit overcharged
Non-condensables in
system
Check superheat and subcooling. Reweigh in charge.
Vacuum system and reweigh in charge.
X
X
X
Restricted metering device Check superheat and subcooling. 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.
High external static. Check duct design and downstream interference.
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.
See ‘Insufficient Capacity’ above.
Check blower.
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
Low Discharge Air
Temperature in Heating
High Humidity
X
X
LEGEND
FP — Freeze Protection
HP — High Pressure
LED — Light-Emitting Diode
LP — Low Pressure
RV — Reversing Valve
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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
50
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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
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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
52
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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
53
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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
54
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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
0.25 min an alarm is generated after the alarm
condition occurs
IAQ/Ventilation
Alarm Delay
X
0.1 - 1.0 min per ppm
Determines if the SPT alarm is
Ignore
Rnet Sensor SPT Alarm
Rnet Sensor SAT Alarm
X
X
Ignore/Display
Ignore/Display
displayed on the local Rnet sensor
Determines if the SAT alarm is
Ignore
displayed on the local Rnet sensor
Determines if the Compressor Lockout
Rnet Sensor Compressor
Lockout Alarm
X
X
Ignore/Display
Ignore/Display
Display
Display
alarm is displayed on the local Rnet
sensor
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
55
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Download from Www.Somanuals.com. All Manuals Search And Download.
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. 04-53500052-01
Printed in U.S.A.
Form 50PEC-2SI
Pg 58
7-09
Replaces: 50PEC-1SI
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50PEC UNIT
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)
UNIT VOLTAGE — COOLING OPERATION
PHASE AB VOLTS
PHASE AB AMPS
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
WATER IN
F WATER OUT
F WATER OUT
F AIR OUT
F
F
F
F
ft wg
ft wg
gpm
gpm
HEATING CYCLE:
WATER IN
AIR COIL
COOLING CYCLE:
AIR IN
HEATING CYCLE:
AIR IN
F AIR OUT
CL-1
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HEATING CYCLE ANALYSIS
ft wg
F
SST
(SATURATED
SUCTION
TEMPERATURE)
AIR
COIL
SUCTION
F
F
COMPRESSOR
DISCHARGE
EXPANSION
COAX
VALVE
F
a50-8453
LIQUID LINE
F
F
ft wg
WATER IN
ft wg
WATER OUT
LOOK UP PRESSURE DROP IN TABLE 12
TO DETERMINE FLOW RATE
COOLING CYCLE ANALYSIS
ft wg
F
SST
(SATURATED
SUCTION
TEMPERATURE)
AIR
COIL
SUCTION
F
F
COMPRESSOR
DISCHARGE
EXPANSION
COAX
VALVE
F
a50-8454
LIQUID LINE
F
F
ft wg
WATER IN
ft wg
WATER OUT
LOOK UP PRESSURE DROP IN TABLE 12
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 – SATURATED SUCTION TEMPERATURE
(DEG F)
=
SUBCOOLING = SATURATED CONDENSING TEMPERATURE – LIQUID LINE TEMPERATURE
(DEG F)
=
*Use 500 for water, 485 for antifreeze.
97B0035N06
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. 04-53500052-01 Printed in U.S.A. Form 50PEC-2SI CL-2 7-09 Replaces: 50PEC-1SI
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