AQUAZONE™
50PSH, PSV, PSD006-070
Single-Stage Water Source Heat Pumps
with PURON® Refrigerant (R-410A)
Installation, Start-Up, and
Service Instructions
Page
CONTENTS
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35-42
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . . .35
Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . . .35
Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . . .36
Unit Start-Up with WSHP Open Controls . . . . . . . . . .40
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . . .42
Ground Coupled, Closed Loop and Plateframe
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Step 1 — Check Jobsite. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
•
•
•
STORAGE
PROTECTION
INSPECT UNIT
Step 3 — Locate Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
•
FIELD CONVERSION OF DISCHARGE AIR
Heat Exchanger Well Systems. . . . . . . . . . . . . . . . . . .42
Step 4 — Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42-46
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Units with Aquazone Complete C Control . . . . . . . . .42
Units with Aquazone Deluxe D Control . . . . . . . . . . . .42
Units with HWR Option. . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Units with WSHP Open Multiple Protocol. . . . . . . . . .43
•
•
HORIZONTAL UNIT
VERTICAL UNITS
Step 5 — Check Duct System . . . . . . . . . . . . . . . . . . . . . . 9
•
•
SOUND ATTENUATION
EXISTING DUCT SYSTEM
Step 6 — Install Condensate Drain. . . . . . . . . . . . . . . . . 9
COMPLETE C AND DELUXE D BOARD
•
•
•
HORIZONTAL UNIT
VERTICAL UNITS
VENTING
SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46,47
Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
WSHP Open Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Aquazone Deluxe D Control LED Indicators . . . . . . .47
Step 7 — Pipe Connections. . . . . . . . . . . . . . . . . . . . . . . 10
•
•
•
•
WATER LOOP APPLICATIONS
GROUND-WATER APPLICATIONS
GROUND-LOOP APPLICATIONS
INSTALLATION OF SUPPLY AND RETURN HOSE
KIT
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48,49
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Fan Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . . .48
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . . .49
Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . . .49
Replacing the WSHP Open Controller’s
Step 8 — Wire Field Power Supply . . . . . . . . . . . . . . . . 13
•
•
•
•
POWER CONNECTION
SUPPLY VOLTAGE
208-VOLT OPERATION
460-VOLT OPERATION
Step 9 — Wire Field Controls . . . . . . . . . . . . . . . . . . . . . 27
•
•
•
•
•
•
THERMOSTAT CONNECTIONS
WATER FREEZE PROTECTION
AIR COIL FREEZE PROTECTION
ACCESSORY CONNECTIONS
WATER SOLENOID VALVES
WSHP OPEN WIRING
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . .49-57
Control Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
WSHP Open Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Thermostatic Expansion Valves . . . . . . . . . . . . . . . . . . . 50
Stopped or Malfunctioned ECM Motor. . . . . . . . . . . . . 54
Moisture Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Step 10 — Operate ECM Interface Board. . . . . . . . . . 29
•
•
•
•
COOLING
HEATING
CFM ADJUST
DEHUMIDIFICATION MODE
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
APPENDIX A — WSHP OPEN SCREEN
CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . .58-63
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . . . . 32-35
Complete C Control Jumper Settings . . . . . . . . . . . . . 32
Deluxe D Control Jumper Settings . . . . . . . . . . . . . . . . 32
Complete C Control DIP Switches. . . . . . . . . . . . . . . . . 32
Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . . . . 32
Units with Modulating Hot Water Reheat
(HWR) Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Deluxe D Control Accessory
Relay Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
50PSH,PSV,PSD START-UP
CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1, CL-2
IMPORTANT: Read the entire instruction manual before
starting installation.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500055-01 Printed in U.S.A. Form 50PS-3SI Pg 1 7-09 Replaces: 50PS-2SI
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Table 1 — Physical Data — 50PSH, PSV, PSD018-070 Units
50PS UNIT SIZE
006*
009*
Rotary
32
012*
018
024
030
036
042
048
060
070
COMPRESSOR (1 Each)
FACTORY CHARGE R-410A (oz)
Scroll
24
34
50
56
58
70
80
80
136
144
ECM FAN MOTOR AND BLOWER
Fan Motor (Hp)
Blower Wheel Size (D x W) (in.)
1
1
1
1
1
N/A
N/A
N/A
N/A
N/A
N/A
/
/
/
/
/
1
1
1
9 x27
9 x27
9 x27
11 x210
11 x210
11 x 10
11 x 10
11 x 10
PSC FAN MOTOR AND BLOWER
(3 Speeds)
1
1
1
1
/
9 x57
0.56
1
/
9 x37
0.76
1
/
9 x27
0.76
1
/
1
/
3
/
4
10 x 10
1.24
Fan Motor (Hp)
/
/
/
1
1
1
25
20
6
/
5
/
3
/
2
/
2
/
4
N/8A
6 x 5
0.56
N/A
1
1
1
1
3
3
/
High Static Fan Motor (Hp)
Blower Wheel Size (D x W) (in.)
Heat Exchanger Water Volume (gal.)
N/A
6 x 5
0.56
N/A
6 x 5
0.56
10 x210
0.92
10 x410
1.24
11 x 10
1.56
11 x 10
1.56
COAXIAL VOLUME (gal.)
.17
.29
.45
.56
.76
.76
.92
1.24
1
1.24
1.56
1.56
1
1
1
3
3
3
3
WATER CONNECTION SIZE, FPT (in.)
HWG CONNECTION SIZE, FPT (in.)
/
2
/
2
/
2
/
4
/
4
/
4
/
4
1
1
1
1
/
1
/
1
/
1
/
1
/
1
/
1
/
1
/
N/A
N/A
N/A
2
2
2
2
2
2
2
2
VERTICAL UPFLOW/DOWNFLOW
Air Coil Dimensions (H x W) (in.)
Throwaway Filter, Standard 1-in.,
Qty...Size
16 x 16
16 x 16
16 x 16
24 x 20
28 x 20
28 x 20
28 x 25
32 x 25
32 x 25
36 x 25
1...
36 x 25
1...
1...
16 x 20
1...
16 x 20
1...
16 x 20
1...
24 x 24
1...
28 x 24
1...
28 x 24
1...
28 x 30
2...
16 x 30
2...
16 x 30
16 x 30;
1...
16 x 30;
1..
20 x 30
20 x 30
Weight
Operating (lb)
Packaged (lb)
126
136
146
156
150
160
252
262
266
276
268
278
327
337
414
424
416
426
441
451
443
453
HORIZONTAL
Air Coil Dimensions (H x W) (in.)
Throwaway Filter, Standard 1-in.,
Qty...Size
16 x 16
16 x 16
16 x 16
18 x 27
18 x 31
18 x 31
20 x 35
1...
20 x 40
1...
20 x 40
1...
20 x 45
20 x 45
1...
16 x 20
1...
16 x 20
1...
16 x 20
2...
18 x 18
2...
18 x 18
2...
18 x 18
12 x 20;
1...
18 x 20;
1...
18 x 20;
1...
2...
20 x 24
2...
20 x 24
20 x 25
20 x 24
20 x 24
Weight
Operating (lb)
Packaged (lb)
Corner (lb)
Left Front
Left Rear
136
146
156
166
160
170
257
267
266
276
268
278
327
337
414
424
416
426
441
451
443
453
45.0
33.0
30.0
28.0
55.0
36.0
33.0
32.0
56.0
37.0
34.0
33.0
74.7
66.2
63.6
47.5
78.8
69.9
67.2
50.2
79.4
70.4
67.7
50.5
104.4
83.7
74.9
64.0
144.3
97.7
92.1
79.9
145.0
98.1
92.6
80.3
182.3
78.4
183.1
78.8
Right Front
Right Rear
72.5
72.8
107.8
108.3
LEGEND
PSC — Permanent Split Capacitor
TXV Thermostatic Expansion Valve
*Unit sizes 006-012 not available on 50PSD unit.
NOTE: All units have spring compressor mountings, TXV expansion devices, and 1/2-
in. and 3/4-in. electrical knockouts.
ECM
FPT
—
—
Electronically Controlled Motor
Female Pipe Thread
—
HWG — Hot Water Generator
7. Provide sufficient access to allow maintenance and
servicing of the fan and fan motor, compressor and coils.
Removal of the entire unit from the closet should not be
necessary.
8. Provide an unobstructed path to the unit within the closet
or mechanical room. Space should be sufficient to allow
removal of unit if necessary.
9. Provide ready access to water valves and fittings, and
screwdriver access to unit side panels, discharge collar,
and all electrical connections.
Step 2 — Check Unit — Upon receipt of shipment at
the jobsite, carefully check the shipment against the bill of
lading. Make sure all units have been received. Inspect the car-
ton or crating of each unit, and inspect each unit for damage.
Ensure the shipping company makes proper notation of any
shortages 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.
NOTE: It is the responsibility of the purchaser to file all
necessary claims with the shipping company.
10. Where access to side panels is limited, pre-removal of the
control box side mounting screws may be necessary for
future servicing.
STORAGE — If the equipment is not needed immediately at
the jobsite, it should be left in its shipping carton and stored in a
clean, dry area of the building or in a warehouse. Units must be
stored in an upright position at all times. If carton stacking is
necessary, stack units a maximum of 3 high. Do not remove
any equipment from its shipping package until it is needed for
installation.
PROTECTION — Once the units are properly positioned on
the jobsite, cover them with either a shipping carton, vinyl film,
or an equivalent protective covering. Cap open ends of pipes
stored on the jobsite. This precaution is especially important in
areas where painting, plastering, or spraying of fireproof mate-
rial, etc. is not yet complete. Foreign material that accumulates
within the units can prevent proper start-up and necessitate
costly clean-up operations.
1. Be sure that the location chosen for unit installation pro-
vides ambient temperatures maintained above freezing.
Well water applications are especially susceptible to
freezing.
2. Be sure the installation location is isolated from sleeping
areas, private offices and other acoustically sensitive
spaces.
NOTE: A sound control accessory package may be used
to help eliminate sound in sensitive spaces.
3. Check local codes to be sure a secondary drain pan is not
required under the unit.
4. Be sure unit is mounted at a height sufficient to provide
an adequate slope of the condensate lines. If an appropri-
ate slope cannot be achieved, a field-supplied condensate
pump may be required.
5. Provide sufficient space for duct connection. Do not al-
low the weight of the ductwork to rest on the unit.
6. Provide adequate clearance for filter replacement and
drain pan cleaning. Do not allow piping, conduit, etc. to
block filter access.
3
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Before installing any of the system components, be sure to
examine each pipe, fitting, and valve, and remove any dirt or
foreign material found in or on these components.
3. Verify that the unit’s refrigerant tubing is free of kinks or
dents, and that it does not touch other unit components.
4. Inspect all electrical connections. Be sure connections are
clean and tight at their terminations.
CAUTION
5. Loosen compressor bolts until the compressor rides freely
on springs. Remove shipping restraints.
DO NOT store or install units in corrosive environments or
in locations subject to temperature or humidity extremes
(e.g., attics, garages, rooftops, etc.). Corrosive conditions
and high temperature or humidity can significantly reduce
performance, reliability, and service life. Always move
units in an upright position. Tilting units on their sides may
cause equipment damage.
1
6. Remove the four /4 in. shipping bolts from compressor
support plate (two bolts on each side) to maximize vibra-
tion and sound alternation.
CAUTION
Failure to remove shipping brackets from spring-mounted
compressors will cause excessive noise and could cause
component failure due to added vibration.
INSPECT UNIT — To prepare the unit for installation, com-
plete the procedures listed below:
1. Compare the electrical data on the unit nameplate with
ordering and shipping information to verify that the
correct unit has been shipped.
2. Do not remove the packaging until the unit is ready for
installation.
7. Remove any blower support cardboard from inlet of the
blower.
8. Locate and verify any accessory kit located in compressor
and/or blower section.
9. Remove any access panel screws that may be difficult to
remove once unit is installed.
3/8” threaded rods
(by others)
FilterAccess
Return Air
(Ductwork
not shown)
Thermostat
Wiring
Field-supplied transition to
minimize pressure loss
Balancing Valve (field-
installed accessory)
Power Wiring
Stainless steel
braid hose
Supply Air
with integral
“J” swivel
Low Pressure Drop Water
Control Valve (optional)
(field-installed accessory)
Unit Power
Building
Loop
Flexible
Connection
Insulated supply duct with
at least one 90 degree elbow
to reduce air noise
Unit Power
Disconnect
(by others)
Water Out
Water In
Field-Supplied
Electric Heat
(if applicable)
(field-supplied)
Ball Valve with optional
Unit Hanger
integral P/Tplug (typical for supply
(field-installed
accessory)
(factory-
Aux Electric
and return piping) (field-installed accessory)
supplied)
Heat Disconnect
3/8” Threaded
Rod (by others)
Vibration Isolator
(white-compressor end
and red-blower end)
Washer
(by others)
Double Hex Nuts
(by others)
Integral hanger support-
pre-attached in factory
A50-7728
UNIT HANGER ISOLATION DETAIL
Fig. 1 — Typical Installation — 50PSH Unit
4
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WATER
CONNEC-
TIONS (in.) -
UNITS WITH
HWR
RETURN
ELECTRICAL
KNOCKOUTS
(in.)
DISCHARGE CONNECTION (in.)
DUCT FLANGE INSTALLED
( 0.10 in.)
CONNECTION (in.)
USING RETURN
AIR OPENING
WATER CONNECTIONS
(in.)
OVERALL
CABINET
(in.)
(
0.10 in.)
50PSH
UNIT
SIZE
J
2
K
L
1
1
/
3
1
2
3
F
4
5
1
2
/
/
4
2
Loop
Water
FPT
M
N
O
P
Q
R
S
T
U
V
Cond
Cond
Cond
HWG
FPT
(LH
rtrn)
Supply Supply (RH
Height Width rtrn)
Return Return
Depth Height
G
H
Con-
A
B
C
D
E
Loop Loop
In D Out E Voltage Pump Supply
Low
Ext
Power
HWG HWG
Width Depth Height In Out
In
Out densate
006,009,
012
1
/
22.4 43.1
22.4 62.2
22.4 62.2
25.4 71.2
25.4 76.2
17.3 3.7 9.7
N/A
N/A
0.8
0.6
0.6
0.6
0.6
N/A
N/A
2.1
N/A
3.8
3.6
3.6
3.6
3.6
6.3
6.1
6.1
6.1
6.1
8.8
8.6
8.6
8.6
8.6
5.3 4.1
9.0
9.0
5.3 4.1 17.1
3.6 2.0 28.1
3.6 2.0 33.8
3.1 1.0 34.8
3.1 1.0 39.8
15.3 2.1 1.0
16.2 2.3 1.5
16.2 2.3 1.5
18.2 3.1 1.5
18.2 3.1 1.5
2
3
/
1
/
018
19.3 2.1 10.0 13.9 16.9
19.3 2.1 10.0 13.9 16.9
21.3 3.4 10.8 15.6 18.9
21.3 3.4 10.8 15.6 18.9
10.0
3.6 2.0 12.5
3.6 2.0 12.5
3.1 1.2 19.0
3.1 1.2 19.0
15.5
15.5
17.5
17.5
4
2
024,
030
3
/
1
/
5.26 13.13
5.96 13.13
5.96 13.13
4
2
3
/
1
/
036
4
2
042,
048
1
/
1
1
2
060,
070
1
/
25.4 81.2
21.3 3.4 10.8 15.6 18.9
0.6
5.96 13.13
3.6
6.1
8.6
3.1 1.2 19.0
17.5
3.1 1.0 44.8
18.2 3.1 1.5
2
NOTES:
1. Condensate is 3/4-in. FPT copper.
LEGEND
PSC BLOWER AIRFLOW
CONFIGURATION
2. Horizontal unit shipped with filter bracket only. This bracket should be
removed for return duct connection.
3. Discharge flange and hanger kit is factory installed.
4. Shaded areas are recommended service areas, not required.
ASP
BSP
CAP
CSP
FPT
HWG
HWR
LH
—
—
—
—
—
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
Female Pipe Thread
Hot Water Generator
Hot Water Reheat
Left Hand
CODE
RETURN
Left
DISCHARGE
Back
E
B
S
Z
Right
Left
Back
Right
a50-8231
Right
Left
RH
Right Hand
Fig. 2 — 50PSH Dimensional Data
5
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WATER
CONNEC-
TIONS (in.) -
UNITS WITH
HWR
RETURN
CONNECTION (in.)
USING RETURN
AIR OPENING
( 0.10 in.)
ELECTRICAL
KNOCKOUTS
(in.)
DISCHARGE CONNECTION (in.)
DUCT FLANGE INSTALLED
WATER CONNECTIONS
(in.)
OVERALL
CABINET
(in.)
(
0.10 in.)
50PSV
UNIT
SIZE
J
2
K
L
1
1
/
3
1
2
3
F
4
5
1
2
/
/
4
2
U
Loop
Water
FPT
M
(LH
rtrn)
N
O
P
Q
R
S
T
Cond Cond Cond
HWG
FPT
Supply Supply (RH
Width Depth rtrn)
Return Return
Depth Height
G
H
A
B
C
D
E
Loop Loop
In D Out E Voltage Pump Supply
Low
Ext
Power
HWG HWG Conden-
Width Depth Height In Out
In
Out
sate
7.4
7.8
7.8
7.8
7.8
006,009,
012
1
/
22.4
22.4
22.4
25.4
25.4
21.6
25.6
25.6
30.6
30.6
34.5 3.7 9.7 N/A
N/A
N/A
N/A
2.1
N/A
3.8
3.6
3.6
3.6
3.6
6.3
6.1
6.1
6.1
6.1
8.8
8.6
8.6
8.6
8.6
6.7 6.3
7.2 5.8
7.2 5.8
6.4 6.3
6.4 6.3
9.0
9.0
6.7 2.3
4.9 2.2
4.9 2.2
5.3 2.2
5.3 2.2
17.1
21.1
21.1
26.1
26.1
15.3
23.2
27.2
27.2
31.2
1.0
1.0
1.0
1.0
1.0
2
3
/
1
/
018
44.6 2.1 10.0 13.9 16.9
48.5 2.1 10.0 13.9 16.9
50.5 3.4 10.8 15.6 18.9
54.5 3.4 10.8 15.6 18.9
10.0
14.0
14.0
18.0
18.0
14.0
14.0
18.0
18.0
4
2
024,
030
3
/
1
/
5.26 13.13
5.96 13.13
5.96 13.13
4
2
3
/
1
/
036
4
2
042,
048
1
/
1
1
2
060,
070
1
/
25.4
30.6
58.5 3.4 10.8 15.6 18.9
7.8
5.96 13.13
3.6
6.1
8.6
6.4 6.3
18.0
18.0
5.3 2.2
26.1
35.2
1.0
2
NOTES:
LEGEND
1. Condensate is 3/4-in. FPT copper and is switchable from side to front.
2. Vertical unit shipped with filter bracket only, extending from unit 2.5-in.
This bracket should be removed for return duct connection.
3. Discharge flange field installed.
PSC BLOWER AIRFLOW
CONFIGURATION
ASP
BSP
CAP
CSP
FPT
HWG
HWR
LH
—
—
—
—
—
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
CODE
RETURN
Left
DISCHARGE
4. Shaded areas are recommended service areas, not required.
Compressor Service Panel
Female Pipe Thread
Hot Water Generator
Hot Water Reheat
Left Hand
L
R
Top
Top
Right
RH
Right Hand
R - Configuration Right Return / Top Discharge
L - Configuration Left Return / Top Discharge
- Top View
- Top View
Right Return
- Air Coil Opening
- Right Side View
Left Return
- Air Coil Opening
- Left Side View
Fig. 3 — 50PSV Dimensional Data
6
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WATER
CONNEC-
TIONS (in.) -
UNITS WITH
HWR
RETURN
CONNECTION (in.)
USING RETURN
AIR OPENING
( 0.10 in.)
ELECTRICAL
KNOCKOUTS
(in.)
DISCHARGE CONNECTION (in.)
DUCT FLANGE INSTALLED
WATER CONNECTIONS
(in.)
OVERALL
CABINET
(in.)
(
0.10 in.)
50PSD
UNIT
SIZE
J
2
K
L
1
1
/
3
1
2
3
F
4
5
1
2
/
/
4
2
Loop
Water
FPT
M
N
O
P
Q
R
S
T
U
Cond Cond Cond
HWG
FPT
(LH
rtrn)
Supply Supply (RH
Width Depth rtrn)
Return Return
Depth Height
G
H
A
B
C
D
E
Loop Loop
In D Out E Voltage Pump Supply
Low
Ext
Power
HWG HWG Conden-
Width Depth Height In Out
In
Out
sate
3
/
1
/
018
22.4
22.4
25.4
25.4
25.6
25.6
30.6
30.6
48.4 2.1 10.0 13.9 16.9
52.5 2.1 10.0 13.9 16.9
54.5 3.4 10.8 15.6 18.9
58.5 3.4 10.8 15.6 18.9
3.6
2.1
10.0
3.6
3.6
3.6
3.6
6.1
6.1
6.1
6.1
8.6
8.6
8.6
8.6
6.7 8.4 10.1
6.7 8.4 10.1
7.2 9.0 13.4
7.2 9.0 13.4
9.1
9.1
10.8 2.2
10.8 2.2
10.4 2.2
10.4 2.2
21.1
21.1
26.1
26.1
23.2
27.2
27.2
31.2
1.0
1.0
1.0
1.0
4
2
024,
030
3
/
1
/
3.6
3.6
3.6
5.96 13.13
5.96 13.13
5.96 13.13
4
2
3
/
1
/
036
12.9
12.9
4
2
042,
048
1
/
1
1
2
060,
070
1
/
25.4
30.6
62.5 3.4 10.8 15.6 18.9
3.6
5.96 13.13
3.6
6.1
8.6
7.2 9.0 13.4
12.9
10.4 2.2
26.1
35.2
1.0
2
NOTES:
LEGEND
1. Condensate is 3/4-in. FPT copper and is switchable from side to front.
2. Vertical unit shipped with filter bracket only, extending from unit 2.5-in.
This bracket should be removed for return duct connection.
3. Downflow unit does not have discharge flange, and is rated for zero
clearance installation.
PSC BLOWER AIRFLOW
CONFIGURATION
ASP
BSP
CAP
CSP
FPT
HWG
HWR
LH
—
—
—
—
—
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
Female Pipe Thread
Hot Water Generator
Hot Water Reheat
Left Hand
CODE
RETURN
Left
DISCHARGE
Bottom
L
R
4. Shaded areas are recommended service areas, not required.
Right
Bottom
RH
Right Hand
Standard Filter Bracket
a50-7846ef
CSP
ASP
CAP
ASP
P
N
N
P
BSP
2' Optional Service
Access Right Rtn
(left opposite)
Blower
Opening
O
Q
Blower
Opening
O
A
A
Front
Front
Condensate 3/4”
FPT
M
Air Coil Side
Air Coil Side
2' Service
Access
B
B
Isometric View
1.6
Left Return / Bottom Discharge
Right Return / Bottom Discharge
1.6
Power Supply 3/4”
HV Knockout
1.1
1/2” Knockout
G
L
4
F
K
Low Voltage 1/2”
LV Knockout
J
3
E
ASP
CSP
U
U
D
CAP
2
1
CSP
Air Coil
Air Coil
BSP
Condensate
3/4” FPT Right Return
T
T
Condensate
C
Left Return
3/4” FPT
5
5
Front
Back
Front
Back
H
R
R
S
S
Right Return Right View -
Air Coil Opening
Left Return Left View -
Front-View
Air Coil Opening
Fig. 4 — 50PSD Dimensional Data
7
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FIELD CONVERSION OF DISCHARGE AIR — The dis-
charge air of the 50PSH horizontal units can be converted
between side and back discharge in the field. The conversion
process is the same for right and left return configurations. See
Fig. 7 and 8.
NOTE: It is not possible to convert return air between left or
right return models in the field due to refrigerant piping
changes.
Supply Air
Building
Loop
Flexible
Connection
Water
Out
Water
In
Balancing Valve
(field-installed
accessory)
Stainless steel
Remove Screws
Water
braid hose
Connection End
with integral
“J” swivel
(field-installed
accessory)
Low Pressure
Drop Water
Control Valve
(optional)
Return Air
Power
Thermostat
Wiring
(field-installed
accessory)
Ball Valve with optional
integral P/T plug
Compressor
Access Panel
(typical for supply and
return piping) (field-Installed
accessory)
Side Discharge
A50-7730
Water
NOTE: Ball valve with integral pressure temperature plug recommended.
Connection End
Rotate
Fig. 5 — Typical Vertical Installation — 50PSV Unit
Return Air
Building
Loop
Flexible
Connection
Water
Out
Water
In
Stainless
steel
braid hose
with
Balancing Valve
(field-installed
accessory)
integral ”J”
swivel(field-
installed
accessory)
Move to Side
Low Pressure
Drop Water
Control Valve
(optional)
Replace Screws
Water
Connection End
Power
Thermostat
(field-installed
accessory)
Wiring
Return Air
Compressor
Ball Valve with
optional integral
Access Panel
Flexible
P/T plug (typical for
supply and return
piping)(field-installed
accessory)
Connection
Drain
Supply Air
A50-7729
A50-6256
NOTE: Ball valve with integral pressure temperature plug recommended.
Discharge Air
Back Discharge
Fig. 6 — Typical Downflow Installation —
50PSD Unit
Fig. 7 — Conversion Left Return,
Side Discharge to Back Discharge
Step 3 — Locate Unit — The following guidelines
Water
Connection End
should be considered when choosing a location for a WSHP:
Return Air
• Units are for indoor use only.
• Locate in areas where ambient temperatures are between
39 F and 102 F and relative humidity is no greater than
75%.
Supply
Duct
• Provide sufficient space for water, electrical and duct
connections.
Side Discharge
• Locate unit in an area that allows easy access and removal
of filter and access panels.
Water
Connection End
• Allow enough space for service personnel to perform
maintenance.
• Return air must be able to freely enter the space if unit needs
to be installed in a confined area such as a closet.
Return Air
Drain
NOTE: Correct placement of the horizontal unit can play an
important part in minimizing sound problems. Since
ductwork is normally applied to these units, the unit can be
placed so that the principal sound emission is outside the oc-
cupied space in sound-critical applications. A fire damper
may be required by the local code if a fire wall is penetrated.
Back Discharge
Discharge Air
A50-6257
Fig. 8 — Conversion Right Return,
Side Discharge to Back Discharge
8
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Preparation — The unit should be on the ground in a well lit
area. Hung units should be taken down to ground level before
converting.
Side to Back Discharge Conversion
1. Remove screws to free the top and discharge panels. Set
screws aside for later use. See Fig. 7.
2. Remove the access panel and set aside.
3. Lift the discharge panel from side of unit and rotate it to
back using care not to damage blower wiring.
4. Check blower wire routing and connections for undue
tension or contact with sheet metal edges. Re-route if
necessary.
5. Check refrigerant tubing for contact with other compo-
nents. Adjust if necessary.
Step 5 — Check Duct System — Size the duct sys-
tem to handle the design airflow quietly.
NOTE: Depending on the unit, the fan wheel may have a ship-
ping support installed at the factory. This must be removed
before operating unit.
SOUND ATTENUATION — To eliminate the transfer of
vibration to the duct system, a flexible connector is recom-
mended for both discharge and return air duct connections on
metal duct systems. The supply and return plenums should in-
clude internal duct liner of fiberglass or be made of duct board
construction to maximize sound attenuation of the blower.
Installing the WSHP unit to uninsulated ductwork in an uncon-
ditioned space is not recommended since it will sweat and
adversely affect the unit’s performance.
To reduce air noise, at least one 90-degree elbow could be
included in the supply and return air ducts, provided system
performance is not adversely impacted. The blower speed can
also be changed in the field to reduce air noise or excessive air-
flow, provided system performance is not adversely impacted.
6. Reinstall top panel using screws set aside in Step 1.
NOTE: Location for some screws at bottom of discharge
panel may have to be changed.
7. Manually spin fan wheel to check for obstructions.
Adjust for any obstruction found.
EXISTING DUCT SYSTEM — If the unit is connected to
existing ductwork, consider the following:
• Verify that the existing ducts have the proper capacity to
handle the unit airflow. If the ductwork is too small, install
larger ductwork.
8. Replace access panel.
Back to Side Discharge Conversion — Follow instructions
above for Side to Back Discharge Conversion, noting the
panels would be reversed.
• Check existing ductwork for leaks and repair as necessary.
Step 4 — Mount the Unit
NOTE: Local codes may require ventilation air to enter the
space for proper indoor air quality. Hard-duct ventilation
may be required for the ventilating air supply. If hard
ducted ventilation is not required, be sure that a proper air
path is provided for ventilation air to unit to meet ventila-
tion requirement of the space.
HORIZONTAL UNIT (50PSH) — Horizontal units should
be mounted using the factory-installed hangers. Proper attach-
ment of hanging rods to building structure is critical for safety.
See Fig. 1. Rod attachments must be able to support the weight
of the unit. See Table 1 for unit operating weights.
VERTICAL UNITS (50PSV, PSD) — Vertical and downflow
units are available in left or right return air configurations. See
Fig. 3 and 4. Mount the unit (except 50PSD) on a vibration
absorption pad slightly larger than the entire base to minimize
vibration transmission. It is not necessary to mount the unit on
the floor. See Fig. 9.
Step 6 — Install Condensate Drain
HORIZONTAL UNIT (50PSH) — Slope the unit toward the
drain at 1/4 in. See Fig. 10. If it is not possible to meet the re-
quired pitch, install a condensate at the unit to pump conden-
sate to building drain.
NOTE: Some codes require the use of a secondary drain pan
under vertical units. Check local codes for more information.
1/4Ó Pitch for
Drainage
A50-7731ef
Pitch Toward
Drain
A50-6260
Drain Connection
Fig. 10 — Horizontal Unit Pitch
Horizontal units are not internally trapped, therefore an ex-
ternal trap is necessary. Install each unit with its own individual
trap and means to flush or blow out the condensate drain line.
Do not install units with a common trap or vent. See Fig. 11 for
typical condensate connections.
Fig. 9 — 50PSV Units Mounted With
Vibration Absorption Pad
NOTE: Never use a pipe size smaller than the connection.
9
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connection sizes. When making piping connections, consider
the following:
• Use a backup wrench when making screw connections to
unit to prevent internal damage to piping.
• Insulation may be required on piping to avoid condensation
in the case where fluid in loop piping operates at tempera-
tures below dew point of adjacent air.
• Piping systems that contain steel pipes or fittings may be
subject to galvanic corrosion. Dielectric fittings may be
used to isolate the steel parts of the system to avoid galvanic
corrosion.
WATER LOOP APPLICATIONS — Water loop applications
usually include a number of units plumbed to a common pip-
ing system. Maintenance to any of these units can introduce air
into the piping system. Therefore, air elimination equipment
comprises a major portion of the mechanical room plumbing.
The flow rate is usually set between 2.25 and 3.5 gpm per
ton of cooling capacity. For proper maintenance and servicing,
pressure-temperature (P/T) ports are necessary for temperature
and flow verification.
A50-7732
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.
Fig. 11 — Trap Condensate Drain Connection
VERTICAL UNITS (50PSV, PSD) — Each unit uses a con-
densate hose inside all cabinets as a trapping loop, therefore an
external trap is not necessary. See Fig. 12.
Each unit must be installed with its own individual vent and
means to flush or blow out the condensate drain line. Do not in-
stall units with a common trap or vent.
Cooling tower/boiler systems typically utilize a common
loop maintained at 60 to 95 F. The use of a closed circuit evap-
orative cooling tower with a secondary heat exchange between
the tower and the water loop is recommended. If an open type
cooling tower is used continuously, chemical treatment and fil-
tering will be necessary.
In addition to complying with any applicable codes, consid-
er the following for system piping:
• Piping systems using water temperatures below 50 F
require 1/2-in. closed cell insulation on all piping surfaces to
eliminate condensation.
3/4” Copper FPT/PVC
3/4” PVC
Vent
1/2”
1/4” per foot
slope to drain
• Avoid all plastic to metal threaded fittings due to the poten-
tial to leak. Use a flange fitted substitute.
• Teflon tape thread sealant is recommended to minimize
internal fouling of the heat exchanger.
• Use backup wrench. Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Flush the piping system prior to operation to remove dirt
and foreign materials from the system.
1/2”
Water
Connections
Alternate
Condensate
Location
A50-6262
GROUND-WATER APPLICATIONS — Typical ground-
water piping is shown in Fig. 13. In addition to complying
with any applicable codes, consider the following for sys-
tem piping:
NOTE: Unit does not need to be sloped toward drain.
Fig. 12 — Vertical Condensate Connection
• Install shut-off valves for servicing.
VENTING — Install a vent in the condensate line of any
application that may allow dirt or air to collect in the line. Con-
sider the following:
• Install pressure-temperature plugs to measure flow and
temperature.
• Connect boiler drains and other valves using a “T” connec-
tor to allow acid flushing for the heat exchanger.
• Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Use PVC SCH80 or copper piping material.
NOTE: PVC SCH40 should not be used due to system high
pressure and temperature extremes.
Water Supply and Quantity — Check water supply. Water
supply should be plentiful and of good quality. See Table 2 for
water quality guidelines.
• Always install a vent where an application requires a long
horizontal run.
• Always install a vent where large units are working against
higher external static pressure and to allow proper drainage
for multiple units connected to the same condensate main.
• Be sure to support the line where anticipated sagging from
the condensate or when “double trapping” may occur.
• If condensate pump is present on unit, be sure drain connec-
tions have a check valve to prevent back flow of condensate
into other units.
Step 7 — Pipe Connections — Depending on the
application, there are 3 types of WSHP piping systems to
choose from: water loop, ground-water and ground loop. Refer
to Piping Section of Carrier System Design Manual for addi-
tional information.
IMPORTANT: Failure to comply with the above required
water quality and quantity limitations and the closed-
system application design requirements may cause damage
to the tube-in-tube heat exchanger. This damage is not the
responsibility of the manufacturer.
All WSHP units use low temperature soldered female pipe
thread fittings for water connections to prevent annealing and
out-of-round leak problems which are typically associated with
high temperature brazed connections. Refer to Table 1 for
10
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Table 2 — 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.
11
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In all applications, the quality of the water circulated
through the heat exchanger must fall within the ranges listed in
the Water Quality Guidelines table. Consult a local water firm,
independent testing facility, or local water authority for specific
recommendations to maintain water quality within the pub-
lished limits.
5. Refer to Table 3. Do not exceed the minimum bend radius
for the hose selected. Exceeding the minimum bend radi-
us may cause the hose to collapse, which reduces water
flow rate. Install an angle adapter to avoid sharp bends
in the hose when the radius falls below the required
minimum.
GROUND-LOOP APPLICATIONS — Temperatures be-
tween 25 and 110 F and a cooling capacity of 2.25 to 3 gpm of
flow per ton is recommended. In addition to complying with
any applicable codes, consider the following for system piping:
• Limit piping materials to only polyethylene fusion in the
buried sections of the loop.
NOTE: Piping must comply with all applicable codes.
Table 3 — Metal Hose Minimum Bend Radii
HOSE DIAMETER (in.)
MINIMUM BEND RADII (in.)
1
/
21/2
2
3
/
4
4
• Do not use galvanized or steel fittings at any time due to
1
51/2
corrosion.
• Avoid all plastic to metal threaded fittings due to the poten-
tial to leak. Use a flange fitted substitute.
• Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Use pressure-temperature (P/T) plugs to measure flow of
pressure drop.
INSTALLATION OF SUPPLY AND RETURN HOSE
KIT — Follow these piping guidelines.
1. Install a drain valve at the base of each supply and return
riser to facilitate system flushing.
2. Install shutoff/balancing valves and unions at each unit to
permit unit removal for servicing.
3. Place strainers at the inlet of each system circulating
pump.
4. Select the proper hose length to allow slack between con-
nection points. Hoses may vary in length by +2% to –4%
under pressure.
Insulation is not required on loop water piping except where
the piping runs through unheated areas or outside the building
or when the loop water temperature is below the minimum ex-
pected dew point of the pipe ambient. Insulation is required if
loop water temperature drops below the dew point.
IMPORTANT: Do not bend or kink supply lines or hoses.
Pipe joint compound is not necessary when Teflon threaded
tape is pre-applied to hose assemblies or when flared-end
connections are used. If pipe joint compound is preferred, use
compound only in small amounts on the male pipe threads of
the fitting adapters. Prevent sealant from reaching the flared
surfaces of the joint.
NOTE: When anti-freeze is used in the loop, assure that it is
compatible with Teflon tape or pipe joint compound employed.
Maximum allowable torque for brass fittings is 30 ft-lb. If a
torque wrench is not available, tighten finger-tight plus one
quarter turn. Tighten steel fittings as necessary.
Water
Control
Valve
Flow
Regulator
(field-installed
accessory)
Pressure
Tank
(field-installed
accessory)
Water Out
Water In
From Pump
Shut-Off
Valve (field-installed accessory)
Strainer (field-installed accessory)
(16 to 20 mesh recommended for
filter sediment)
Boiler
Drains
(field-installed)
A50-7733
Fig. 13 — Typical Ground-Water Piping Installation
12
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Optional pressure-rated hose assemblies designed specifi-
cally for use with Carrier units are available. Similar hoses can
be obtained from alternate suppliers. Supply and return hoses
are fitted with swivel-joint fittings at one end to prevent kink-
ing during installation.
SUPPLY VOLTAGE — Operating voltage to unit must be
within voltage range indicated on unit nameplate.
On 3-phase units, voltages under load between phases must
be balanced within 2%. Use the following formula to deter-
mine the percentage voltage imbalance:
% Voltage Imbalance
CAUTION
max voltage deviation from average voltage
= 100 x
Backup wrench is required when tightening water connec-
tions to prevent water line damage. Failure to use a backup
wrench could result in equipment damage.
average voltage
Example: Supply voltage is 460-3-60.
AB = 452 volts
BC = 464 volts
AC = 455 volts
Refer to Fig. 14 for an illustration of a supply/return hose
kit. Male adapters secure hose assemblies to the unit and risers.
Install hose assemblies properly and check them regularly to
avoid system failure and reduced service life.
452 + 464 + 455
Average Voltage =
3
Step 8 — Wire Field Power Supply
WARNING
1371
=
3
= 457
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.
Determine maximum deviation from average voltage:
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
CAUTION
Maximum deviation is 7 v.
Determine percent voltage imbalance.
Use only copper conductors for field-installed electrical
wiring. Unit terminals are not designed to accept other
types of conductors. Failure to use copper conductors could
result in equipment damage.
7
% Voltage Imbalance = 100 x
457
= 1.53%
All field-installed wiring, including the electrical ground,
MUST comply with the National Electrical Code (NEC) as
well as applicable local codes. In addition, all field wiring must
conform to the Class II temperature limitations described in the
NEC.
Refer to unit wiring diagrams Fig. 15-25 for a schematic of
the field connections, which must be made by the installing (or
electrical) contractor. Refer to Tables 4-6 for fuse sizes.
This amount of phase imbalance is satisfactory as it is
below the maximum allowable 2%.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to electri-
cal components.
NOTE: If more than 2% voltage imbalance is present, contact
your local electric utility.
Consult the unit wiring diagram located on the inside of the
compressor access panel to ensure proper electrical hookup.
The installing (or electrical) contractor must make the field
connections when using field-supplied disconnect.
Operating voltage must be the same voltage and phase as
shown in electrical data shown in Tables 4-6.
Make all final electrical connections with a length of flexi-
ble conduit to minimize vibration and sound transmission to
the building.
208-VOLT OPERATION — All 208-230 volt units are factory
wired for 208 volts. The transformers may be switched to
230-volt operation by switching the red (208 volt) wire with
the orange (230 volt) wire at the L1 terminal.
460-VOLT OPERATION — Units using 460-v and an
ECM (electronically commutated motor) fan motor, modulat-
ing HWR, and/or internal secondary pump will require a
neutral wire from the supply side in order to feed accessory
with 265-v.
POWER CONNECTION — Make line voltage connection
by connecting the incoming line voltage wires to the line
side of the compressor contactor terminal as shown in
Fig. 26. See Tables 4-6 for amperage ratings to provide cor-
rect wire and maximum overcurrent protection sizing.
A50-7734
Swivel
Brass
Fitting
Brass
Fitting
Rib Crimped
Length
(2 ft Length Standard)
MPT
Fig. 14 — Supply/Return Hose Kit
13
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LEGEND
TRANS
UPS
—
—
Transformer
Solenoid Coil
AL
—
—
—
—
—
—
Alarm Relay Contacts
Aquastat
Unit Performance Sentinel
Factory Low Voltage Wiring
Factory Line Voltage Wiring
Field Low Voltage Wiring
Field Line Voltage Wiring
Printed Circuit Trace
ASTAT
BR
Relay Contacts - N.C.
Relay Contacts - N.O.
Capacitor
Blower Relay
CB
Circuit Breaker
Compressor Contactor
Condensate Overflow Sensor
CC
CO
COMPR — Compressor
DTS
FP1
FP2
HP
—
—
—
—
—
—
—
—
—
—
—
—
Discharge Temp Switch
Water Coil Freeze Protection Sensor
Air Coil Freeze Protection Sensor
High-Pressure Switch
Hot Water Generator
Jumper Wire
Loss of Charge Pressure Switch
Motorized Valve
National Electrical Code
Permanent Split Capacitor
Field Wiring Terminal Block
Reversing Valve Solenoid
Temperature Switch
Low Pressure Switch
Optional Wiring
Relay/Contactor Coil
HWG
JW
High Pressure Switch
Wire Nut
Thermistor
LOC
MV
Condensate Pan
Circuit Breaker
Splice Cap
LED
NEC
PSC
P1
G
RVS
*Optional.
NOTES:
COMPLETE C CONTROLLER FAULT CODES
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
DESCRIPTION OF OPERATION
LED
ALARM RELAY
3. 208/230 v transformer will be connected for 208 v operation. For
230 v operation, disconnect RED lead at L1 and attach ORANGE
lead to L1. Insulate open end of RED lead. Transformer is energy
limiting or may have circuit breaker.
Normal Mode
ON
Open
Cycle (Closed 5 Sec.
Open 25 Sec.)
Normal Mode with UPS Warning
ON
Complete C is Non-Functional
Fault Retry
Lockout
OFF
Slow Flash
Fast Flash
Open
Open
Closed
4. FP1 thermistor provides freeze protection for water. When using
antifreeze solutions, cut JW3 jumper.
5. Check installation wiring information for specific thermostat hookup.
Refer to thermostat installation instructions for wiring to the unit.
Thermostat wiring must be “Class 1” and voltage rating equal to or
greater than unit supply voltage.
Open
(Closed After 15 Min.)
Over/Under Voltage Shutdown
Slow Flash
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 Complete C board standoffs and
screws to control box. (Ground available from top two standoffs as
shown.)
8. Aquastat is supplied with unit and must be wired in series with the
hot leg to the pump. Aquastat is rated for voltage up to 277 v.
9. Fan motors factory wired for medium speed. For high and low speed
remove BLU wire from fan motor speed tap ‘M’ and connect to ‘H’
for high or ‘L’ for low.
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-UPS in Memory
Swapped FP1/FP2 Lockout
Flashing Code 1
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
Cycling Code 1
Cycling Code 2
Cycling Code 3
Cycling Code 4
Cycling Code 5
Cycling Code 6
Flashing Code 7
Cycling Code 7
Flashing Code 8
Flashing Code 9
Cycling Code 8
Cycling Code 9
Fig. 15 — Units with Complete C Controller, Single-Phase
14
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LEGEND
P1
—
—
—
Field Wiring Terminal Block
AL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Aquastat
Ground
RVS
Reversing Valve Solenoid
ASTAT
BM
TRANS
Transformer
Blower Motor
Solenoid Coil
BMC
BR
Blower Motor Capacitor
Blower Relay
Circuit Breaker
Compressor Contactor
Condensate Overflow Sensor
Compressor
Discharge Temp Switch
Water Coil Freeze Protection Sensor
Air Coil Freeze Protection Sensor
High-Pressure Switch
Hot Water Generator
Jumper Wire
Loss of Charge Pressure Switch
Motorized Valve
National Electric Code
Factory Low Voltage Wiring
Factory Line Voltage Wiring
Field Low Voltage Wiring
Field Line Voltage Wiring
Printed Circuit Trace
Relay Contacts - N.C.
Relay Contacts - N.O.
Capacitor
CB
CC
CO
COMPR
DTS
FP1
FP2
HP
Optional Wiring
Temperature Switch
Low Pressure Switch
Relay/Contactor Coil
HWG
JW
Thermistor
High Pressure Switch
Wire Nut
LOC
MV
Condensate Pan
Circuit Breaker
NEC
Splice Cap
LED
*Optional.
G
NOTES:
DELUXE D CONTROLLER FAULT CODES
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 460 v (BLK/RED) lead for 460/60/3 units,
575 v (GRY) lead for 575/60/3. Transformer is energy limiting or may
have circuit breaker.
STATUS LED
(GREEN)
TEST LED
(YELLOW)
OFF
OFF
ON
—
—
—
OFF
FAULT LED
ALARM
RELAY
Open
Open
Cycle (Note 3)
OPERATION
(RED)
Note 2
Normal Mode
Deluxe D is Non-Functional
Test Mode
ON
OFF
—
OFF
Note 2
Note 2
Note 2
4. FP1 thermistor provides freeze protection for water. When using anti-
freeze solutions, cut JW3 jumper.
5. Check installation wiring information for specific thermostat hookup.
Refer to thermostat installation instructions for wiring to the unit.
Thermostat wiring must be “Class 1” and voltage rating equal to or
greater than unit supply voltage.
6. 24-v alarm signal shown. For dry alarm contact, cut 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.)
8. Aquastat is supplied with unit and must be wired in series with the
hot leg to the pump. Aquastat is rated for voltage up to 277 v.
9. Blower motor is factory wired for high and low speeds. No other com-
bination is available.
10. The 460-v units using an ECM (electronically commutated motor) fan
motor, modulating HWR, and/or an internal secondary pump will
require a neutral wire from the supply side in order to feed the acces-
sory with 265-v.
Night Setback
Flashing Code 2
Flashing Code 3
Flashing Code 4
ON
—
—
—
Emergency Shut Down
Invalid Thermostat Inputs
No Fault in Memory
Note 2
Flashing Code 1
Open
Slow Flash/
(Fast Flash)
Slow Flash/
(Fast Flash)
Slow Flash/
(Fast Flash)
Slow Flash/
(Fast Flash)
HP Fault/(Lockout) Note 1
LP Fault/(Lockout) Note 1
FP1 Fault/(Lockout) Note 1
FP2 Fault/(Lockout) Note 1
CC Fault/(Lockout) Note 1
OFF
OFF
OFF
OFF
OFF
Flashing Code 2 Open/(Closed)
Flashing Code 3 Open/(Closed)
Flashing Code 4 Open/(Closed)
Flashing Code 5 Open/(Closed)
Flashing Code 6 Open/(Closed)
Slow Flash/
(Fast Flash)
Over-Under Voltage
Normal Mode with UPS
Swapped FP1/FP2 Lockout
Slow Flash
ON
Fast Flash
OFF
OFF
OFF
Flashing Code 7 Open (Note 4)
Flashing Code 8 Cycle (Note 5)
TABLE 1
Blower
Speeds
WIRE NUMBER
3
Flashing Code 9
Closed
1
2
4
5
NOTES:
1. Status LED (GREEN) Slow Flash - Controller In - Fault Retry Mode. Fast Flash - Controller in Lock-
out Mode. Slow Flash = 1 Flash per every 2 seconds. Fast Flash = 2 Flashes per every 1 second.
2. Fault LED (RED) flashes a code representing last fault in memory. If no fault in memory code 1 is
flashed.
Factory
BM(H) to BM(R) to BM(M) to
BR2(6) to
BR2(4)
BM(L) to BR2(6) to
BR2(7) BR2(4)
Not Used
HI + MED
BR2(6)
BR2(3)
BR2(7)
BM(H) to BM(R) to
HI + LOW
Not Used
BR2(6)
BR2(3)
3. Cycles appropriate code, by cycling alarm relay in the same sequence as fault LED.
4. Alarm relay closes after 15 minutes.
BM(H) to BM(R) to BM(M) to BM(L) to BR2(2) to
MED + LOW
5. Alarm relay cycles. Closed for 5 seconds and open for 25 seconds.
BR2(3)
BR2(3)
BR2(6)
BR2(7)
BR2(4)
Fig. 16 — Units with Deluxe D Controller, Three-Phase (460/575 V)
15
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LEGEND
RVS
TRANS
UPS
—
—
—
Reversing Valve Solenoid
AL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Aquastat
Solenoid Coil
Transformer
ASTAT
BM
Unit Performance Sentinel
Factory Low Voltage Wiring
Factory Line Voltage Wiring
Field Low Voltage Wiring
Field Line Voltage Wiring
Printed Circuit Trace
Optional Wiring
Blower Motor
Relay Contacts - N.C.
Relay Contacts - N.O.
Capacitor
BR
Blower Relay
Circuit Breaker
Compressor Contactor
Condensate Overflow Sensor
Compressor
Discharge Temp Switch
Electronically Commutated Motor
Water Coil Freeze Protection Sensor
Air Coil Freeze Protection Sensor
High-Pressure Switch
Hot Water Generator
Jumper Wire
Loss of Charge Pressure Switch
Leaving Water Temperature
Motorized Valve
National Electric Code
Field Wiring Terminal Block
CB
CC
CO
COMPR
DTS
ECM
FP1
FP2
HP
Temperature Switch
Low Pressure Switch
High Pressure Switch
Wire Nut
Relay/Contactor Coil
HWG
JW
Thermistor
LOC
LWT
MV
Condensate Pan
Circuit Breaker
Ground
Splice Cap
G
LED
NEC
P1
*Optional.
NOTES:
COMPLETE C CONTROLLER FAULT CODES
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
DESCRIPTION OF OPERATION
LED
ALARM RELAY
3. 208/230 v transformer will be connected for 208 v operation. For
230 v operation, disconnect RED lead at L1 and attach ORANGE
lead to L1. Insulate open end of RED lead. Transformer is energy
limiting or may have circuit breaker.
4. FP1 thermistor provides freeze protection for water. When using
antifreeze solutions, cut JW3 jumper.
5. Check installation wiring information for specific thermostat hookup.
Refer to thermostat installation instructions for wiring to the unit.
Thermostat wiring must be “Class 1” and voltage rating equal to or
greater than unit supply voltage.
Normal Mode
ON
Open
Cycle (Closed 5 Sec.
Open 25 Sec.)
Normal Mode with UPS Warning
ON
Complete C is Non-Functional
Fault Retry
OFF
Slow Flash
Fast Flash
Open
Open
Closed
Lockout
Open
Over/Under Voltage Shutdown
Slow Flash
(Closed After 15 Min.)
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 Complete C board standoffs and
screws to control box. (Ground available from top two standoffs as
shown.)
8. Aquastat is supplied with unit and must be wired in series with the
hot leg to the pump. Aquastat is rated for voltage up to 277 v.
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
Flashing Code 1
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
Cycling Code 1
Cycling Code 2
Cycling Code 3
Cycling Code 4
Cycling Code 5
Cycling Code 6
Test Mode-Over/Under Shutdown
in Memory
Flashing Code 7
Cycling Code 7
Test Mode-UPS in Memory
Swapped FP1/FP2 Lockout
Flashing Code 8
Flashing Code 9
Cycling Code 8
Cycling Code 9
Fig. 17 — Units with Complete C ECM Blower, Three-Phase (208/230 V)
16
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a50-8363
Complete C
LEGEND
AL
— Alarm Relay Contacts
NEC
P1
— National Electrical Code
— Field Wiring Terminal Block
— Reversing Valve Solenoid
Wire Nut
ASTAT — Aquastat
BM
— Blower Motor
RVS
Relay Contacts - N.C.
Relay Contacts - N.O.
Low Pressure Switch
High Pressure Switch
Splice Cap
BMC
BR
— Blower Motor Capacitor
— Blower Relay
TRANS — Transformer
Field Line Voltage Wiring
CB
— Circuit Breaker
Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
CC
— Compressor Contactor
CO
— Sensor, Condensate Overflow
— Discharge Temperature Switch
— Electronically Commutated Motor
— Sensor, Water Coil Freeze Protection
— Sensor, Air Coil Freeze Protection
— High-Pressure Switch
DTS
ECM
FP1
FP2
HP
Relay/Contactor Coil
Circuit Breaker
Condensate Pan
Solenoid Coil
Temperature Switch
Thermistor
HPWS
HWG
JW1
LOC
LON
MV
— High-Pressure Water Switch
— Hot Water Generator
— Clippable Field Selection Jumper
— Loss of Charge Pressure Switch
— Local Operating Network
— Motorized Valve
MVES
*Optional Wiring.
— Motorized Valve End Switch
Ground
NOTES:
8. Aquastat is supplied with unit and must be wired in series with
the hot leg to the pump. Aquastat is rated for voltages up to
277-v.
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 460 v (BLK/RED) lead for 460/3/60
units. Transformer is energy limiting or may have circuit
breaker.
9. Optional LON wires. Only connect if LON connection is desired
at the wall sensor.
10. Fan motors are factory wired for medium speed. For high or low
speed, remove BLU wire from fan motor speed tap “M” and
connect to “H” for high speed or “L” for low speed.
11. For low speed, remove BLK wire from BR “6” and replace with
RED. Connect BLK and BRN wires together.
12. For blower motors with leads. For medium or low speed,
disconnect BLK wire from BR “6”. Connect BLK and ORG/PUR
wire together. Connect RED for low or BLU for medium to
BR “6”.
13. The 460-v units using an ECM (electronically commutated
motor) fan motor, modulating HWR (hot water reheat), and/or
an internal secondary pump will require a neutral wire from the
supply side in order to feed the accessory with 265-v.
4. FP1 thermistor provides freeze protection for water. When
using antifreeze solutions, cut JW3 jumper.
5. Typical thermostat wiring shown. Refer to thermostat installa-
tion instructions for wiring to the unit. Thermostat wiring must
be Class 1 and voltage rating equal to or greater than unit sup-
ply voltage.
6. Factory cut JW1 jumper. Dry contact will be available between
AL1 and AL2.
7. Transformer secondary ground via Complete C board standoffs
and screws to control box. (Ground available from top two
standoffs as shown.)
Fig 18 — Units with ECM, Complete C and LON Controller (460 V)
17
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Deluxe D
HP
LOC
SEE NOTE 4
FP1
FP2
RVS
CO
a50-8364
LEGEND
AL
— Alarm Relay Contacts
P1
— Field Wiring Terminal Block
— Reversing Valve Solenoid
Wire Nut
ASTAT — Aquastat
RVS
BM
— Blower Motor
Relay Contacts - N.C.
Relay Contacts - N.O.
Low Pressure Switch
High Pressure Switch
Splice Cap
TRANS — Transformer
BMC
BR
— Blower Motor Capacitor
— Blower Relay
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
CB
— Circuit Breaker
CC
— Compressor Contactor
CO
— Sensor, Condensate Overflow
— Discharge Temperature Switch
— Electronically Commutated Motor
— Sensor, Water Coil Freeze Protection
— Sensor, Air Coil Freeze Protection
— High-Pressure Switch
DTS
ECM
FP1
FP2
HP
Relay/Contactor Coil
Circuit Breaker
Condensate Pan
Solenoid Coil
Temperature Switch
Thermistor
HPWS
HWG
JW1
LOC
LON
MV
— High-Pressure Water Switch
— Hot Water Generator
— Clippable Field Selection Jumper
— Loss of Charge Pressure Switch
— Local Operating Network
— Motorized Valve
Ground
NEC
*Optional Wiring.
— National Electrical Code
8. Aquastat is supplied with unit and must be wired in series with
the hot leg to the pump. Aquastat is rated for voltages up to
277-v.
9. Blower motor is factory wired for medium and high speeds. For
any other combination of speeds, at the motor attach the BLK
wire to the higher of the two desired speed taps and the BLU
wire to the lower of the two desired speed taps.
10. Optional LON wires. Only connect if LON connection is desired
at the wall sensor.
11. Blower motor is factory wired for high and low speeds. No other
combination is available.
12. The 460-v units using an ECM (electronically commutated
motor) fan motor, modulating HWR (hot water reheat), and/or
an internal secondary pump will require a neutral wire from the
supply side in order to feed the accessory with 265-v.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 460 v (BLK/RED) lead for 460/3/60
units. Transformer is energy limiting or may have circuit
breaker.
4. FP1 thermistor provides freeze protection for water. When
using antifreeze solutions, cut JW3 jumper.
5. Typical thermostat wiring shown. Refer to thermostat installa-
tion instructions for wiring to the unit. Thermostat wiring must
be Class 1 and voltage rating equal to or greater than unit sup-
ply voltage.
6. Factory cut JW1 jumper. 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.)
Fig 19 — Units with ECM, Deluxe D and LON Controller (460 V)
18
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a50-8232
LEGEND
RVS
—
Reversing Valve Solenoid
Saturated Air Temperature
Transformer
AL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Aquastat
Thermistor
SAT
—
—
—
ASTAT
BM
TRANS
UPS
Blower Motor
Ground
Unit Performance Sentinel
BR
Blower Relay
Circuit Breaker
Compressor Contactor
Sensor, Condensate Overflow
Cooling Relay
CB
Field Line Voltage Wiring
Field Low Voltage Wiring
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Wire Nut
CC
CO
Relay Contacts - N.C.
Relay Contacts - N.O.
Low Pressure Switch
High Pressure Switch
Splice Cap
CR
DTS
ECM
FP1
FP2
HP
Discharge Temp Switch
Electronically Commuted Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High Pressure Switch
High Pressure Water Switch
Hot Water Generator
Jumper Wire
Loss of Charge Pressure Switch
Leaving Water Temperature
Motorized Valve
Motorized Valve End Switch
Field Wiring Terminal Block
Optional Wiring
Relay/Contactor Coil
HPWS
HWG
JW
Circuit Breaker
Capacitor
Condensate Pan
Solenoid Coil
LOC
LWT
MV
G
MVES
P1
LED
Temperature Switch
*Optional Wiring.
NOTES:
COMPLETE C CONTROLLER FAULT CODES
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
DESCRIPTION OF OPERATION
LED
ALARM RELAY
3. 208-240 60 Hz units are wired for 208v operation. Transformer is energy
limiting or may have circuit breaker.
4. FP1 thermistor provides low temperature protection for water. When
using antifreeze solutions, cut JW3 jumper.
Normal Mode
ON
Open
Cycle (Closed 5 Sec.
Open 25 Sec.)
Normal Mode with UPS Warning
ON
Complete C is Non-Functional
Fault Retry
OFF
Slow Flash
Open
Open
Closed
5. Refer to multiple protocol controller (MPC), LON, or TSTAT Installation,
Application, and Operation Manual for control wiring to the wire from
PremierLink controller to “Y” Complete C when motorized valve is not
used. Thermostat wiring must be “Class 1” and voltage rating equal to or
greater than unit supply voltage.
Lockout
Fast Flash
Over/Under Voltage Shutdown
Test Mode-No Fault in Memory
Test Mode-HP Fault in Memory
Slow Flash
Open (Closed After 15 Min.)
Cycling Code 1
Cycling Code 2
Cycling Code 3
Cycling Code 4
Cycling Code 5
Cycling Code 6
Flashing Code 1
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
6. 24v alarm signal shown. For dry contact, cut JW1 jumper and dry con-
tact will be available between AL1 and AL2.
7. Transformer secondary ground via green wire with yellow stripe from “C” Test Mode-LP Fault in Memory
terminal to control box.
Test Mode-FP1 Fault in Memory
Test Mode-FP2 Fault in Memory
Test Mode-CO Fault in Memory
8. Aquastat is supplied with unit and must be wired in series with the hot
leg to the pump. Aquastat is rated for voltages up to 277v.
Test Mode-Over/Under Shutdown
in Memory
Flashing Code 7
Cycling Code 7
Test Mode-UPS in Memory
Swapped FP1/FP2 Lockout
Flashing Code 8
Flashing Code 9
Cycling Code 8
Cycling Code 9
Fig. 20 — Units with Complete C and Premierlink™ Controller, Single-Phase (208/230 V)
19
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A50-8355
20
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A50-8354
21
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A50-8356
22
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A50-8353
23
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a50-8380
D B
8
7
6
4
5 3
1
2
1
D
L E
1
2
4
3
1
2
2
2
G n d
n e R t +
R n e
+ 1 2
N
E E G R
W H I T E
- t
B L A C K
R E D
V
To WSHP Controller
Rnet Terminals (J13)
24
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Table 4 — 50PSH, PSV, PSD Electrical Data — PSC Motor
COMPRESSOR
UNITS WITH PSC MOTOR AND HWR
50PS
UNIT
SIZE
RATED
VOLTAGE
V-Ph-Hz
FAN
MOTOR
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
MAX
FUSE/
HACR
VOLTAGE
MIN/MAX
REHEAT
PUMP
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
MAX
FUSE /
HACR
RLA
LRA
Qty
006
009
012
208/230-1-60
208/230-1-60
208/230-1-60
197/254
197/254
197/254
3.1
3.9
5.0
17.7
21.0
25.0
1
1
1
0.4
0.4
0.4
3.5
4.3
5.7
4.3
5.3
7.0
15
15
15
0.43
0.43
0.43
3.9
4.8
6.1
4.7
5.7
7.4
15
15
15
208/230-1-60
265-1-60
197/254
239/292
9.0
8.4
48.0
40.0
1
1
1.0
0.9
10.0
9.3
12.3
11.4
20
15
0.43
N/A
10.4
N/A
12.7
N/A
20
N/A
018
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
12.8
8.0
4.0
60.0
55.0
22.4
1
1
1
1.1
1.1
0.6
13.9
9.1
4.6
17.1
11.1
5.6
25
15
15
0.43
0.43
N/A
14.3
9.5
N/A
17.5
11.5
N/A
30
15
N/A
024
208/230-1-60
265-1-60
197/254
239/292
197/254
414/506
13.5
10.9
8.3
61.0
58.0
63.0
27.0
1
1
1
1
1.4
1.6
1.4
0.9
14.9
12.5
9.7
18.3
15.2
11.8
6.5
30
25
20
15
0.80
0.70
0.80
0.70
15.7
13.2
10.5
6.1
19.1
15.9
12.6
7.2
30
25
20
15
030
036
042
048
060
070
208/230-3-60
460-3-60
4.5
5.4
208/230-1-60
265-1-60
208/230-3-60
460-3-60
197/254
239/292
197/254
414/506
14.7
12.5
10.4
4.5
72.5
61.0
63.0
32.0
1
1
1
1
2.1
2.2
2.1
1.3
16.8
14.7
12.5
5.8
20.5
17.8
15.1
6.9
35
30
25
15
0.80
0.70
0.80
0.70
17.6
15.4
13.3
6.5
21.3
18.5
15.9
7.6
35
30
25
15
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
518/633
15.4
11.5
5.1
83.0
77.0
35.0
31.0
1
1
1
1
2.1
2.1
1.0
0.8
17.5
13.6
6.1
21.4
16.5
7.4
35
25
15
15
0.80
0.80
0.70
N/A
18.3
14.4
6.8
22.2
17.3
8.1
35
25
15
575-3-60
4.3
5.1
6.2
N/A
N/A
N/A
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
518/633
20.5
14.6
7.1
109.0
91.0
46.0
34.1
1
1
1
1
3.0
3.0
1.7
1.4
23.5
17.6
8.8
28.6
21.3
10.6
7.8
45
35
15
15
0.80
0.80
0.70
N/A
24.3
18.4
9.5
29.4
22.1
11.3
N/A
45
35
15
575-3-60
5.1
6.5
N/A
N/A
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
518/633
26.9
17.6
9.6
145.0
123.0
64.0
1
1
1
1
4.9
4.9
2.5
1.9
31.8
22.5
12.1
8.0
38.5
26.9
14.5
9.5
60
40
20
15
1.07
1.07
1.07
N/A
32.9
23.6
13.2
N/A
39.6
28.0
15.6
N/A
60
45
25
575-3-60
6.1
40.0
N/A
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
518/633
30.1
20.5
9.6
158.0
155.0
75.0
1
1
1
1
5.8
5.8
2.6
2.3
35.9
26.3
12.2
9.9
43.4
31.4
14.6
11.8
70
50
20
15
1.07
1.07
1.07
N/A
37.0
27.4
13.3
N/A
44.5
32.5
15.7
N/A
70
50
25
575-3-60
7.6
54.0
N/A
LEGEND
Full Load Amps
NOTE: Unit sizes 006-012 are not available on 50PSD units.
FLA
—
—
—
—
—
HACR
HWR
LRA
RLA
Heating, Air Conditioning and Refrigeration
Hot Water Reheat
Locked Rotor Amps
Rated Load Amps
Table 5 — 50PSH, PSV, PSD Electrical Data — PSC High-Static Motor
UNITS WITH HIGH-STATIC PSC MOTOR
AND HWR
COMPRESSOR
50PS
UNIT
SIZE
RATED
VOLTAGE
V-Ph-Hz
FAN
MOTOR
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
MAX
FUSE/
HACR
VOLTAGE
MIN/MAX
REHEAT
PUMP
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
MAX
FUSE /
HACR
RLA
LRA
Qty
208/230-1-60
265-1-60
197/254
239/292
9.0
8.4
48.0
40.0
1
1
1.10
0.90
7.9
7.1
12.4
11.4
20
15
0.80
0.70
10.9
10.0
13.2
12.1
20
20
018
024
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
12.8
8.0
4.0
60.0
55.0
22.4
1
1
1
1.40
1.40
0.90
14.2
9.4
4.9
17.4
11.4
5.9
30
15
15
0.80
0.80
0.70
15.0
10.2
5.6
18.2
12.2
6.6
30
20
15
208/230-1-60
265-1-60
197/254
239/292
197/254
414/506
13.5
10.9
8.3
61.0
58.0
63.0
27.0
1
1
1
1
1.80
2.00
1.80
1.24
15.3
12.9
10.1
5.7
18.7
15.6
12.2
6.9
30
25
20
15
0.80
0.70
0.80
0.70
16.1
13.6
10.9
6.4
19.5
16.3
13.0
7.6
30
25
20
15
030
036
042
048
060
208/230-3-60
460-3-60
4.5
208/230-1-60
265-1-60
208/230-3-60
460-3-60
197/254
239/292
197/254
414/506
14.7
12.5
10.4
4.5
72.5
61.0
63.0
32.0
1
1
1
1
2.00
1.66
2.00
1.00
16.7
14.2
12.4
5.5
20.4
17.3
15.0
6.6
35
25
25
15
0.80
0.70
0.80
0.70
17.5
14.9
13.2
6.2
21.2
18.0
15.8
7.3
35
30
25
15
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
518/633
15.4
11.5
5.1
83.0
77.0
35.0
31.0
1
1
1
1
3.00
3.00
1.70
1.40
18.4
14.5
6.8
22.3
17.4
8.1
35
25
15
15
0.80
0.80
0.70
N/A
19.2
15.3
7.5
23.1
18.2
8.8
35
25
15
575-3-60
4.3
5.7
6.8
N/A
N/A
N/A
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
518/633
20.5
14.6
7.1
109.0
91.0
46.0
34.1
1
1
1
1
3.40
3.40
1.80
1.40
23.9
18.0
8.9
29.0
21.7
10.7
7.8
45
35
15
15
1.07
1.07
1.07
N/A
25.0
19.1
10.0
N/A
30.1
22.7
11.7
N/A
50
35
15
575-3-60
5.1
6.5
N/A
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
518/633
26.9
17.6
9.6
145.0
123.0
64.0
1
1
1
1
5.80
5.80
2.60
2.30
32.7
23.4
12.2
8.4
39.4
27.8
14.6
9.9
60
45
20
15
1.07
1.07
1.07
N/A
33.8
24.5
13.3
N/A
40.5
28.9
15.7
N/A
60
45
25
575-3-60
6.1
40.0
N/A
LEGEND
Full Load Amps
NOTE: Unit sizes 006-012 are not available with PSC high-static motors.
FLA
—
—
—
—
—
HACR
HWR
LRA
RLA
Heating, Air Conditioning and Refrigeration
Hot Water Reheat
Locked Rotor Amps
Rated Load Amps
25
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Table 6 — 50PSH, PSV, PSD Electrical Data, ECM Motor
COMPRESSOR
UNITS WITH ECM MOTOR AND HWR
50PS
UNIT
SIZE
RATED
VOLTAGE
V-Ph-Hz
FAN
MOTOR
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
MAX
FUSE/
HACR
VOLTAGE
MIN/MAX
REHEAT
PUMP
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
MAX
FUSE /
HACR
RLA
LRA
Qty
208/230-1-60
265-1-60
197/254
239/292
9.0
8.4
48.0
40.0
1
1
4.3
4.1
13.3
12.5
15.6
14.6
20
20
0.8
0.7
14.1
13.2
16.4
15.3
25
20
018
024
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
12.8
8.0
4.0
60.0
55.0
22.4
1
1
1
4.3
4.3
4.1
17.1
12.3
8.1
20.3
14.3
9.1
30
20
15
0.8
0.8
0.7
17.9
13.1
8.8
21.1
15.1
9.8
30
20
15
208/230-1-60
265-1-60
197/254
239/292
197/254
414/506
13.5
10.9
8.3
61.0
58.0
63.0
27.0
1
1
1
1
4.3
4.1
4.3
4.1
17.8
15.0
12.6
8.6
21.2
17.7
14.7
9.7
30
25
20
15
0.8
0.7
0.8
0.7
18.6
15.7
13.4
9.3
22.0
18.4
15.5
10.4
35
25
20
15
030
036
208/230-3-60
460-3-60
4.5
208/230-1-60
265-1-60
208/230-3-60
460-3-60
197/254
239/292
197/254
414/506
14.7
12.5
10.4
4.5
72.5
61.0
63.0
32.0
1
1
1
1
4.3
4.1
4.3
4.1
19.0
16.6
14.7
8.6
22.7
19.7
17.3
9.7
35
30
25
15
0.8
0.7
0.8
0.7
19.8
17.3
15.5
9.3
23.5
20.4
18.1
10.4
35
30
25
15
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
15.4
11.5
5.1
83.0
77.0
35.0
1
1
1
4.3
4.3
4.1
19.7
15.8
9.2
23.6
18.7
10.5
35
30
15
0.8
0.8
0.7
20.5
16.6
9.9
24.4
19.5
11.2
35
30
15
042
048
060
070
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
20.5
14.6
7.1
109.0
91.0
46.0
1
1
1
7.0
7.0
6.9
27.5
21.6
14.0
32.6
25.3
15.8
50
35
20
1.07
1.07
1.07
28.6
22.7
15.1
33.7
26.3
16.8
50
40
20
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
26.9
17.6
9.6
145.0
123.0
64.0
1
1
1
7.0
7.0
6.9
33.9
24.6
16.5
40.6
29.0
18.9
60
45
25
1.07
1.07
1.07
35.0
25.7
17.6
41.7
30.1
20.0
60
45
25
208/230-1-60
208/230-3-60
460-3-60
197/254
197/254
414/506
30.1
20.5
9.6
158.0
155.0
75.0
1
1
1
7.0
7.0
6.9
37.1
27.5
16.5
44.6
32.6
18.9
70
50
25
1.07
1.07
1.07
38.2
28.6
17.6
45.7
33.7
20.0
70
50
25
LEGEND
Full Load Amps
NOTES:
1. The 460-v units using an ECM (electronically commutated motor) fan
motor, modulating HWR, and/or an internal secondary pump will require
a neutral wire from the supply side in order to feed the accessory with
265-v.
FLA
—
—
—
—
—
HACR
HWR
LRA
RLA
Heating, Air Conditioning and Refrigeration
Hot Water Reheat
Locked Rotor Amps
Rated Load Amps
2. Unit sizes 006-012 are not available with ECM motors.
CAPACITOR
COMPLETE C CONTROL
COMPRESSOR CONTACTOR
LINE
L O A D
ECM CONTROL
BOARD
TRANSFORMER
A50-7737
Fig. 26 — 50PSH,PSV,PSD Typical Single-Phase Line Voltage Power Connection
26
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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 29 shows typical wiring for a 24-vac external
solenoid valve. Figures 30 and 31 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 9 — Wire Field Controls
THERMOSTAT CONNECTIONS — The thermostat should
be wired directly to the ECM control board. See Fig. 27.
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 us-
ing antifreeze in colder earth loop applications. See Fig. 28.
NOTE: The extended range option should be selected
with water temperatures below 60 F to prevent internal
condensation.
AIR COIL FREEZE PROTECTION — The air coil freeze
protection jumper JW2 (FP2) is factory set for 30 F and should
not need adjusting.
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.
ACCESSORY CONNECTIONS — Terminal A on the control
is provided to control accessory devices such as water valves,
electronic air cleaners, humidifiers, etc. This signal operates
with the compressor terminal. See Fig. 29. Refer to the specific
unit wiring schematic for details.
IMPORTANT: Connecting a water solenoid valve can
overheat the anticipators of electromechanical thermo-
stats. Only use relay based electronic thermostats.
NOTE: The A terminal should only be used with 24-volt
signals — not line voltage signals.
CAPACITOR
COMPLETE C CONTROL
COMPRESSOR CONTACTOR
LINE
A D
L O
J1
S1
W
O
CFM
SW1
TRANSFORMER
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
Y2
Y1
G
ON
OFF
DEHUM
TB1
a50-8197
R
C
Y2 Y1
G
O
W
C
R
DH AL1
A
A
AL1
THERMOSTAT CONNECTION
Fig. 27 — Low Voltage Field Wiring
TERMINAL STRIP P2
C
A50-6269
TYPICAL
WATER
VALVE
24 VAC
A
Fig. 29 — Typical Accessory Wiring
A50-7764
AQUAZONE CONTROL (Complete C Shown)
Fig. 28 — Typical Aquazone™ Control Board
Jumper Locations
27
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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.
a50-8441
The WSHP Open system offers the following SPT sensors.
See Table 8.
2
AMV
TACO VALVE
3
1
HEATER SWITCH
Table 8 — SPT Sensors
PART
NUMBER
SENSOR
FEATURES
SPT
Standard
• Local access port
• No operator control
SPS
THERMOSTAT
• Slide potentiometer to adjust set point
• Manual on button to override schedule
• LED to show occupied status
• Local access port
SPT Plus
SPT Pro
SPPL
SPP
Fig. 30 — AMV Valve Wiring
• 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
SPT Pro
Plus
SPPF
a50-8442
• Local access port
• Fan speed*
Fig. 31 — Taco SBV Valve Wiring
*The SPT Pro Plus fan speed adjustment has no effect in this application.
WSHP OPEN WIRING — The WSHP Open controller will
be factory mounted to the unit control panel and wired to the
Complete C or Deluxe D control board, however, the system
wiring will need to be completed utilizing WSHP Open con-
troller wiring diagrams and the Third Party Integration (TPI)
Guide. Factory installation includes harness, LWT (leaving
water temperature), supply air, and condensate sensor.
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:
• 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
WARNING
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 9.
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.
Wiring Sensors to Inputs — Sensors can be wired to the
WSHP Open controller’s inputs. See Table 7.
Table 9 — Rnet Wiring Specifications
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 hole provided in corner post.
2. Feed the wires through the raceway to the WSHP Open
controller.
RNET WIRING SPECIFICATIONS
4 conductor, unshielded, CMP,
Description
plenum rated cable
Conductor
Maximum Length
18 AWG
500 ft
Jacket: white
Wiring: black, white, green, red
Recommended Coloring
UL Temperature
Voltage
32 to 167 F
300-vac, power limited
UL: NEC CL2P, or better
3. Connect the wires to the removable Phoenix connectors.
4. Reconnect the connectors to the board.
Listing
LEGEND
Field-Supplied Sensor Hardware — The WSHP Open con-
troller is configurable with the following field-supplied sen-
sors. See Table 7.
AWG — American Wire Gage
CMP — Communications Plenum Cable
NEC — National Electrical Code
UL
— Underwriters Laboratories
Table 7 — Field-Supplied Sensors for
WSHP Open Controller
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.
SENSOR
NOTES
Space Temperature Sensor
(SPT)
Field Installed (Must be used with
WSHP Open controller.)
2. Strip about 1/4 in. of the inner insulation from each wire.
Outdoor Air
Temperature Sensor
Network Sensor
See Fig. 32.
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.
28
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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.
OUTER JACKET
To wire the RH sensor to the controller:
1. Strip the outer jacket from the cable for at least 4 in.
2. Strip 1/4 in. of insulation from each wire.
3. Wire the sensor to the controller.
a50-8443
.25 IN.
INNER INSULATION
Fig. 32 — Rnet Cable Wire
Step 10 — Operate ECM Interface Board —
The ECM fan is controlled by an interface board that converts
thermostat inputs and field selectable cfm settings to signals
used by the ECM (electronically commutated motor)
controller. See Fig. 33.
3. Wire each terminal on the sensor to the same terminal on
the controller. See Fig. 15-25. Table 10 shows the recom-
mended Rnet wiring scheme.
Table 10 — Rnet Wiring
WIRE
Red
TERMINAL
+12-v
1/4" SPADE
CONNECTIONS
TO COMPLETE C OR
THERMOSTAT
Black
White
Green
.Rnet–
Rnet+
DELUXE D BOARD
INPUT LEDS
G
G
G
G
R
Gnd
NOTE: The wire should be connected to the terminal shown.
Wiring a Supply Air Temperature (SAT) Sensor
SAT sensor is required for reheat applications.
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.
—
The
CFM COUNTER
THERMOSTAT
CONNECTIONS
1 FLASH PER 100 CFM
Y
ECM MOTOR
LOW VOLTAGE
CONNECTOR
To wire the SAT sensor to the controller:
1. Wire the sensor to the controller. See Fig. 15-25.
2. Verify that the Enable SAT jumper is on.
3. Verify that the Enable SAT and Remote jumper is in the
left position.
G
DEHUMIDIFICATION
LED
A50-7739
FAN SPEED SELECTION DIP SWITCH
Wiring an Indoor Air Quality (IAQ) Sensor
—
An IAQ
Fig. 33 — ECM Interface Board Physical Layout
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.)
NOTE: Power must be off to the unit for at least three seconds
before the ECM will recognize a speed change. The motor will
recognize a change in the CFM Adjust or Dehumidification
mode settings while the unit is powered.
There are four different airflow settings from lowest airflow
rate (speed tap 1) to the highest airflow rate (speed tap 4).
Table 11 indicates settings for both versions of the ECM inter-
face board, followed by detailed information for each setting.
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.
CAUTION
When the disconnect switch is closed, high voltage is
present in some areas of the electrical panel. Exercise cau-
tion when working with energized equipment. Failure to
heed this safety precaution could lead to personal injury.
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.
To wire the IAQ sensor to the controller:
COOLING — The cooling setting determines the cooling
(normal) cfm for all units with ECM motor. Cooling (normal)
setting is used when the unit is not in Dehumidification mode.
Tap 1 is the lowest cfm setting, while tap 4 is the highest cfm
setting. To avoid air coil freeze-up, tap 1 may not be used if the
Dehumidification mode is selected. See Table 11.
HEATING — The heating setting determines the heating cfm
for 50PSH, PSV, PSD units. Tap 1 is the lowest cfm setting,
while tap 4 is the highest cfm setting. See Table 11.
CFM ADJUST — The CFM Adjust setting allows four selec-
tions. The NORM setting is the factory default position. The +
or – settings adjust the airflow by ±15%. The + or – settings are
used to “fine tune” airflow adjustments. The TEST setting runs
the ECM at 70% torque, which causes the motor to operate
like a standard PSC motor, and disables the cfm counter. See
Tables 11-13 for ECM and PSC blower motors performance
data.
1. Wire the sensor to the controller. See Fig. 15-25.
1
2. Install a field-supplied 250-ohm, /4 watt, 2% tolerance
resistor across the controller’s RH/IAQ and Gnd
terminals.
3. Verify the the RH/IAQ jumper is set to 0 to 5 vdc.
Wiring a Relative Humidity (RH) Sensor — The RH sensor
is used for zone humidity control (dehumidification) if the
WSHP unit has a dehumidification device. If not, the sensor
only monitors humidity.
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
29
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DEHUMIDIFICATION MODE — The dehumidification mode
setting provides field selection of humidity control. When oper-
ating in the normal mode, the cooling airflow settings are deter-
mined by the cooling tap setting in Table 11. When dehumidifi-
cation is enabled, there is a reduction in airflow in cooling to in-
crease the moisture removal of the heat pump. The
Dehumidification mode can be enabled in two ways:
1. Constant Dehumidification mode: When the Dehumidifi-
cation mode is selected via DIP switch, the ECM will
operate with a multiplier applied to the cooling CFM
settings (approximately 20 to 25% lower airflow). Any
time the unit is running in the Cooling mode, it will oper-
ate at the lower airflow to improve latent capacity. The
“DEHUM” LED will be illuminated at all times. Heating
airflow is not affected.
NOTE: Do not select Dehumidification mode if cooling
setting is tap 1.
2. Automatic (humidistat-controlled) Dehumidification
mode: When the Dehumidification mode is selected
via DIP switch AND a humidistat is connected to termi-
nal DH, the cooling airflow will only be reduced when
the humidistat senses that additional dehumidification is
required. The DH terminal is reverse logic. Therefore,
a humidistat (not dehumidistat) is required. The
“DEHUM” LED will be illuminated only when the humi-
distat is calling for Dehumidification mode. Heating
airflow is not affected.
NOTE: Do not select Dehumidification mode if cooling
setting is tap 1.
Table 11 — ECM Blower Motor Performance Data
COOLING MODE
(cfm)
DEHUMIDIFICATION MODE
(cfm)
HEATING MODE
(cfm)
50PS
UNIT
SIZE
MAX
ESP
(in. wg)
FAN
MOTOR
(hp)
TAP
SETTING
Stage 1
Stage 2
Fan
Stage 1
Stage 2
Fan
Stage 1
Stage 2
Fan
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
750
700
620
530
950
850
730
610
620
570
510
430
780
700
600
500
920
820
720
620
380
350
310
270
470
420
360
300
560
500
440
380
700
630
540
450
790
700
610
530
870
780
670
560
1030
910
790
660
1100
980
850
730
590
550
480
—
740
660
570
—
880
780
680
—
1090
980
840
—
1230
1100
960
—
1350
1210
1040
—
1600
1420
1230
—
1710
1520
1330
—
480
450
400
—
610
540
470
—
720
640
560
—
900
800
690
—
1010
900
790
—
1110
990
850
—
1310
1170
1010
—
1400
1250
1090
—
380
350
310
—
470
420
360
—
560
500
440
—
700
630
540
—
790
700
610
—
870
780
670
—
1030
910
790
—
1100
980
850
—
750
700
620
530
1060
950
820
690
620
570
510
430
870
780
670
570
1000
900
800
700
380
350
310
270
470
420
360
300
560
500
440
380
700
630
540
450
790
700
610
530
870
780
670
560
1030
910
790
660
1100
980
850
730
1
/
018
024
030
036
042
048
060
070
0.50
0.50
0.50
0.50
0.50
0.75
0.75
2
1
/
2
1130
1000
880
1230
1100
980
1
/
2
750
850
1400
1250
1080
900
1580
1400
1230
1050
1730
1550
1330
1120
2050
1825
1580
1320
1150
1020
890
1400
1250
1080
900
1580
1400
1230
1050
1850
1650
1430
1200
2280
2050
1750
1470
1150
1020
890
1
/
2
740
740
1290
1150
1000
860
1420
1270
1090
920
1680
1500
1300
1080
1780
1600
1400
1200
1290
1150
1000
860
1520
1350
1180
980
1870
1680
1430
1210
1780
1680
1470
1220
1
/
2
1
1
1
2230
1950
1700
1450
2230
2100
1840
1520
0.75
4. All units are ARI/ISO (Air Conditioning & Refrigeration Institute/
International Organization for Standardization) 13256-1 rated
Tap Setting 3.
LEGEND
ESP — External Static Pressure
5. Airflow in cfm with wet coil and clean air filter.
NOTES:
6. Units have an ECM (electronically commuted motor) fan motor
as a standard feature. The small additional pressure drop of
the reheat coil causes the ECM motor to slightly increase rpm
to overcome the added pressure drop and maintain selected
cfm up to maximum ESP (external static pressure).
7. Unit sizes 006-012 are not available with ECM motors.
1. Factory setting is Tap Setting 2.
2. Airflow is controlled within 5% up to the Max ESP shown with
wet coil.
3. Do not select Dehumidification mode if Tap Setting is on
Setting 1.
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Table 12 — PSC Blower Motor Performance Data
50PS
UNIT
SIZE
AIRFLOW (cfm) AT EXTERNAL STATIC PRESSURE (in. wg)
RATED
MIN
FAN
SPEED
AIRFLOW CFM
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.60
0.70
0.80
0.90
1.00
HI
MED
LO
704
602
531
708
601
529
711
599
527
702
590
522
693
581
517
692
583
512
690
585
506
683
579
501
675
573
495
658
560
479
640
547
462
598
492
515
018
024
030
036
042
048
600
850
450
600
HS HI
HS MED
HS LO
894
765
683
886
760
672
877
755
661
859
747
649
841
738
636
827
725
616
812
711
596
786
690
584
760
668
571
744
654
560
728
640
549
659
602
HI
MED
LO
965
841
723
960
833
715
954
825
707
943
817
703
931
809
698
923
800
689
914
790
680
898
777
668
882
763
656
862
747
642
842
731
627
794
686
725
623
635
HS HI
1271 1250 1229 1207 1185 1164 1143 1118 1093 1061 1029
953
822
726
875
731
660
753
626
HS MED 1048 1037 1025 1016 1007
994
865
981
855
962
842
943
829
915
809
886
789
HS LO
890
887
884
879
874
HI
MED
LO
1271 1250 1229 1207 1185 1164 1143 1118 1093 1061 1029
1048 1037 1025 1016 1007
890 887 884 879 874
953
822
875
753
994
865
981
855
962
842
943
829
915
809
886
789
950
750
HS HI
1439 1411 1383 1355 1327 1297 1266 1232 1198 1160 1122 1041
943
870
798
830
762
HS MED 1186 1174 1162 1151 1140 1126 1112 1089 1065 1039 1013
946
866
HS LO
1039 1038 1036 1028 1020 1009
997
983
968
946
923
HI
MED
LO
1411 1407 1402 1390 1378 1370 1361 1326 1290 1248 1205 1083
1171 1164 1156 1145 1133 1113 1092 1064 1035 997 958
983 967 950 943 936 936
942
1250
1400
1600
900
HS HI
1648 1633 1617 1597 1576 1557 1537 1493 1448 1397 1345 1207 1051
903
1141 1128 1115 1106 1097 1077 1057 1031 1005
957
HS MED 1344 1335 1325 1312 1299 1276 1253 1220 1186 1143 1099 1007
HS LO
966
926
HI
MED
LO
1634 1626 1618 1606 1594 1583 1571 1539 1507 1464 1420 1265 1078
1332 1323 1314 1298 1282 1263 1243 1206 1169 1115 1060
1130 1109 1088 1086 1084 1066 1048 1052 1055
1050
1200
HS HI
1798 1781 1764 1738 1711 1688 1665 1630 1595 1555 1514 1420 1239
HS MED 1384 1382 1379 1375 1371 1356 1341 1318 1294 1261 1227
HS LO
1091 1088 1084 1081 1078 1069 1060
HI
MED
LO
1798 1781 1764 1738 1711 1688 1665 1630 1595 1555 1514 1420 1239
1384 1382 1379 1375 1371 1356 1341 1318 1294 1261 1227
HS HI
2011 1977 1942 1923 1903 1841 1778 1755 1732 1689 1645 1520 1431 1307 1211
HS MED 1881 1858 1834 1807 1780 1746 1711 1676 1640 1604 1567 1469 1378 1286
HS LO
1738 1716 1694 1673 1651 1634 1617 1584 1551 1508 1465 1390 1321 1228
HI
MED
LO
2311 2306 2300 2290 2279 2268 2257 2233 2209 2175 2140 2088 1990 1901 1856 1752
2058 2049 2039 2028 2016 2000 1983 1966 1949 1935 1920 1874 1807 1750 1670 1582
1868 1863 1858 1858 1858 1848 1838 1822 1806 1799 1792 1749 1699 1636 1570
060
070
1950
2100
1500
1800
HS HI
2510 2498 2486 2471 2455 2440 2424 2401 2377 2348 2318 2247 2161 2078 1986 1855
HS MED 2171 2167 2162 2162 2162 2158 2153 2135 2117 2101 2085 2024 1971 1891 1823 1691
HS LO
2010 2008 2006 2006 2006 2006 2006 1992 1977 1962 1947 1892 1851 1782 1705 1600
HI
MED
LO
2510 2498 2486 2471 2455 2440 2424 2401 2377 2348 2318 2247 2161 2078 1986 1855
2171 2167 2162 2162 2162 2158 2153 2135 2117 2101 2085 2024 1971 1891 1823
2010 2008 2006 2006 2006 2006 2006 1992 1977 1962 1947 1892 1851
NOTES:
LEGEND
1. Shaded areas denote ESP where operation is not recommended.
2. Units factory shipped on medium speed. Other speeds require field
selection.
ESP
HS
—
—
External Static Pressure
High Static
3. All airflow is rated and shown above at the lower voltage if unit is dual
voltage rated, e.g., 208 v for 208/230 v units.
4. Only two-speed fan (high and medium) available on 575 v units.
5. Data for units 006-012 not available at time of printing.
Table 13 — PSC Blower Motor Performance Data for 50PS Units with HWR
UNITS WITH REHEAT ESP LOSS
COIL
FACE VELOCITY
FPM
018
in. wg
024,030
in. wg
036
in. wg
042,048
in. wg
060,070
in. wg
200
250
300
350
400
450
500
0.037
0.052
0.077
0.113
0.181
0.242
0.360
0.033
0.046
0.066
0.096
0.160
0.226
0.345
0.031
0.042
0.059
0.085
0.145
0.215
0.335
0.028
0.038
0.051
0.073
0.131
0.205
0.326
0.026
0.034
0.044
0.061
0.117
0.194
0.316
LEGEND
ESP — External Static Pressure
HWR — Hot Water Reheat
NOTES:
1. For units with HWR coil applications, calculate face velocity of the enter-
ing air. From the data table, find ESP for reheat application. The loss
includes wet coil loss.
2. Data for units 006-012 not available at time of printing.
31
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AIR COIL FREEZE PROTECTION (FP2) LIMIT SET-
TING — Select jumper 2 (JW2-FP2 Low Temp) to choose
FP2 limit of either 30 F or 10 F. To select 30 F as the limit, DO
NOT clip the jumper. To select 10 F as the limit, clip the
jumper.
ALARM RELAY SETTING — Select jumper 4 (JW4-AL2
Dry) to either connect 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.
PRE-START-UP
System Checkout — When the installation is complete,
follow the system checkout procedure outlined below before
starting up the system. Be sure:
1. Voltage is within the utilization range specifications of the
unit compressor and fan motor and voltage is balanced
for 3-phase units.
2. Fuses, breakers and wire are correct size.
3. Low voltage wiring is complete.
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
input normally opened or closed. To configure for normally
closed operation, DO NOT clip the jumper. To configure for
normally open operation, clip the jumper.
4. Piping and system flushing is complete.
5. Air is purged from closed loop system.
6. System is balanced as required. Monitor if necessary.
7. Isolation valves are open.
8. Water control valves or loop pumps are wired.
9. Condensate line is open and correctly pitched.
10. Transformer switched to lower voltage tap if necessary.
11. Blower rotates freely — shipping support is removed.
12. Blower speed is on correct setting.
13. Air filter is clean and in position.
14. Service/access panels are in place.
15. Return-air temperature is between 40 to 80 F heating and
50 to 110 F cooling.
Complete C Control DIP Switches — The Com-
plete C control has 1 DIP (dual in-line package) switch bank
with five switches labeled SW1. See Fig. 15, 17, 18, 20, 21, or
23.
PERFORMANCE MONITOR (PM) — The PM is a unique
feature that monitors water temperature and will display a warn-
ing when heat pump is beyond typical operating range. Refer to
Control Operation section for detailed information. 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.
16. Air coil is clean.
17. Control field-selected settings are correct.
AIR COIL — To obtain maximum performance, clean the air
coil before starting the unit. A 10% solution of dishwasher
detergent and water is recommended for both sides of the coil.
Rinse thoroughly with water.
STAGE 2 — DIP switch 2 will enable or disable compressor
delay. Set DIP switch to OFF for stage 2 in which the compres-
sor will have a 3-second delay before energizing.
NOTE: The alarm relay will not cycle during Test mode if
switch is set to OFF, stage 2.
SWITCH 3 — Not used.
DDC OUTPUT AT EH2 — Switch 4 provides a selection for
Direct Digital Control (DDC) operation. If set to DDC output
at EH2, the EH2 terminal will continuously output the last fault
code of the controller. If the control is set to EH2 Normal, then
EH2 will operate as standard electric heat output. Set the
switch to ON to set the EH2 to normal. Set the switch to OFF
to set the DDC output at EH2.
FACTORY SETTING — Switch 5 is set to ON. Do not
change the switch to OFF unless instructed to do so by the
factory.
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.
Complete C Control Jumper Settings
Deluxe D Control DIP Switches — The Deluxe D
control has 2 DIP (dual in-line package) switch banks. Each
bank has 8 switches and is labeled either S1 or S2 on the cir-
cuit board. See Fig. 16, 19, 22, or 24.
DIP SWITCH BANK 1 (S1) — This set of switches offers
the following options for Deluxe D control configuration:
Performance Monitor (PM) — The PM is a unique feature
that monitors water temperature and will display a warning
when heat pump is beyond typical operating range. Set switch 1
to enable or disable 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 com-
pressor relay can be set to turn on with stage 1 or stage 2 call
from the thermostat. This setting is used with dual stage units
(units with 2 compressors and 2 Deluxe D controls) or in mas-
ter/slave applications. In master/slave applications, each com-
pressor and fan will stage according to its switch 2 setting. If
switch is set to stage 2, the compressor will have a 3-second
delay before energizing during stage 2 demand.
WATER COIL FREEZE PROTECTION (FP1) LIMIT
SETTING — Select jumper 3 (JW3-FP1 Low Temp) to
choose FP1 limit of either 30 F or 10 F. To select 30 F as the
limit, DO NOT clip the jumper. To select 10 F as the limit, clip
the jumper.
AIR COIL FREEZE PROTECTION (FP2) LIMIT SET-
TING — Select jumper 2 (JW2-FP2 Low Temp) to choose
FP2 limit of either 30 F or 10 F. To select 30 F as the limit, DO
NOT clip the jumper. To select 10 F as the limit, clip the
jumper.
ALARM RELAY SETTING — Select jumper 1 (JW1-AL2
Dry) to either connect 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.
Deluxe D Control Jumper Settings
WATER COIL FREEZE PROTECTION (FP1) LIMIT
SETTING — Select jumper 3 (JW3-FP1 Low Temp) to
choose FP1 limit of either 30 F or 10 F. To select 30 F as the
limit, DO NOT clip the jumper. To select 10 F as the limit, clip
the jumper.
NOTE: If DIP switch is set for stage 2, the alarm relay will not
cycle during Test mode.
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Heating/Cooling Thermostat Type — Switch 3 provides se-
lection 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 thermostats.
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 reversing valve (heating
or cooling) depending upon switch 4 setting.
Table 15 — DIP Switch Block S2 —
Accessory 2 Relay Options
DIP SWITCH POSITION
ACCESSORY 2
RELAY OPTIONS
4
5
6
Cycle with Compressor
Digital NSB
Water Valve — Slow Opening
OAD
On
Off
On
On
On
On
Off
On
On
On
On
Off
LEGEND
NSB — Night Setback
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 thermostats with O output. Select OFF for
thermostats with B output.
OAD — Outside Air Damper
NOTE: All other switch combinations are invalid.
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.
Output — Switch 6 provides selection for DDC operation. If
set to DDC output at EH2, the EH2 terminal will continuously
output the last fault code of the controller. If the control is set to
EH2 normal, then the EH2 will operate as standard electric
heat output. Set the switch to ON to set the EH2 to normal. Set
the switch to OFF to set the DDC output at EH2.
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.
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.
Factory Setting — Switch 8 is set to ON. Do not change the
switch to OFF unless instructed to do so by the factory.
Units with Modulating Hot Water Reheat
(HWR) Option — A heat pump equipped with hot water
reheat (HWR) can operate in three modes: cooling, cooling
with reheat, and heating. The cooling and heating modes are
like any other water source heat pump. The reversing valve
("O" signal) is energized in cooling, along with the compressor
contactor(s) and blower relay. In the heating mode, the revers-
ing valve is deenergized. Almost any thermostat will activate
the heat pump in heating or cooling modes. The Deluxe D
microprocessor board, which is standard with the HWR
option, will accept either heat pump (Y,O) thermostats or non-
heat pump (Y,W) thermostats.
If switch 8 is set for 50 F, then the compressor will be used
for heating as long as the FP1 is above 50 F. The compressor
will not be used for heating when the FP1 is below 50 F and the
compressor will operates in emergency heat mode, staging on
EH1 and EH2 to provide heat. If a thermal switch is being used
instead of the FP1 thermistor, only the compressor will be used
for heating mode when the FP1 terminals are closed. If the FP1
terminals are open, the compressor is not used and the control
goes into emergency heat mode.
DIP SWITCH BANK 2 (S2) — This 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 14 for DIP switch
combinations.
The reheat mode requires either a separate humidistat/
dehumidistat or a thermostat that has an integrated dehumidifi-
cation function for activation. The Deluxe D board is config-
ured to work with either a humidistat or dehumidistat input to
terminal “H” (DIP switch settings for the Deluxe D board are
shown in Table 16). Upon receiving an “H” input, the Deluxe
D board will activate the cooling mode and engage reheat.
Table 16 — Humidistat/Dehumidistat Logic and
Deluxe D DIP Switch Settings
Reheat
Reheat
Sensor
2.1 2.2 2.3
Logic
(ON) - H (OFF) - H
Humidistat
Off Off Off Reverse
Dehumidistat Off On Off Standard 24 VAC
0 VAC
24 VAC
0 VAC
Switches 4 to 6 — These DIP switches provide selection of
Accessory 2 relay options. See Table 15 for DIP switch
combinations.
Table 17 shows the relationship between thermostat input
signals and unit operation. There are four operational inputs for
single-stage units and six operational inputs for dual-stage
units:
Table 14 — DIP Switch Block S2 —
Accessory 1 Relay Options
• Fan Only
• Cooling Stage 1
• Cooling Stage 2
• Heating Stage 1
• Heating Stage 2
• Reheat Mode
DIP SWITCH POSITION
ACCESSORY 1
RELAY OPTIONS
1
2
3
Cycle with Fan
Digital NSB
Water Valve — Slow Opening
OAD
Reheat — Humidistat
Reheat — Dehumidistat
On
Off
On
On
Off
Off
On
On
Off
On
Off
On
On
On
On
Off
Off
Off
LEGEND
NSB — Night Setback
OAD — Outside Air Damper
NOTE: All other DIP switch combinations are invalid.
33
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HWR APPLICATION CONSIDERATIONS — Unlike
most hot gas reheat options, the HWR option will operate
over a wide range of entering-water temperatures (EWTs).
Special flow regulation (water regulating valve) is not
required for low EWT conditions. However, below 55 F,
supply-air temperatures cannot be maintained at 72 F
because the cooling capacity exceeds the reheat coil capac-
ity at low water temperatures. Below 55 F, essentially all
water is diverted to the reheat coil (no heat of rejection to
the building loop). Although the HWR option will work fine
with low EWTs, overcooling of the space may result with
well water systems or, on rare occasions, with ground loop
(geothermal) systems (NOTE: Extended range units are
required for well water and ground loop systems). Since
dehumidification is generally only required in cooling, most
ground loop systems will not experience overcooling of the
supply-air temperature. If overcooling of the space is a con-
cern (e.g., computer room well water application), auxiliary
heating may be required to maintain space temperature
when the unit is operating in the dehumidification mode.
Water source heat pumps with HWR should not be used as
makeup air units. These applications should use equipment
specifically designed for makeup air.
HWR COMPONENT FUNCTIONS — The proportional
controller operates on 24 VAC power supply and automatically
adjusts the water valve based on the supply-air sensor. The
supply-air sensor senses supply-air temperature at the blower
inlet, providing the input signal necessary for the proportional
control to drive the motorized valve during the reheat mode of
operation. The motorized valve is a proportional actuator/three-
way valve combination used to divert the condenser water
from the coax to the hydronic reheat coil during the reheat
mode of operation. The proportional controller sends a signal
to the motorized valve based on the supply-air temperature
reading from the supply air sensor.
The loop pump circulates condenser water through the hy-
dronic reheat coil during the reheat mode of operation (refer to
Fig. 34). In this application, the loop pump is only energized
during the reheat mode of operation. The hydronic coil is uti-
lized during the reheat mode of operation to reheat the air to the
set point of the proportional controller. Condenser water is di-
verted by the motorized valve and pumped through the hydron-
ic coil by the loop pump in proportion to the control set point.
The amount of reheating is dependent on the set point and how
far from the set point the supply air temperature is. The factory
set point is 70 to 75 F, generally considered "neutral" air.
Table 17 — HWR Operating Modes
INPUT
Y1
OUTPUT
MODE
O
On/Off
On/Off
On
On
On
On/Off
Off
Off
G
Y2*
Off
Off
Off
On
On/Off
Off
Off
On
On/Off
H
O
On/Off
On/Off
On
On
On
On
Off
Off
Off
G
Y1
Off
Off
On
On
On
On
On
On
On
Y2*
Off
Off
Off
On
On/Off
On
Off
On
On/Off
Reheat
Off
Off
Off
Off
Off
On
Off
Off
No Demand
Fan Only
Off
On
On
On
On
Off
On
On
On
Off
Off
On
On
On
Off
On
On
Off
Off
Off
Off
On
On
Off
Off
On
Off
On
On
On
On
On
On
On
On
Cooling Stage 1
Cooling Stage 2
Cooling and Dehumidistat
Dehumidistat Only
Heating Stage 1
†
Heating Stage 2
Heating and Dehumidistat**
Off
On
Off
*Not applicable for single stage units; Full load operation for dual
capacity units.
†Cooling input takes priority over dehumidify input.
**Deluxe D is programmed to ignore the H demand when the unit is
in heating mode.
NOTE: On/Off is either on or off.
a50-8145
Water Out
(To Water Loop)
Refrigerant In
(Cooling)
Mixing Valve
Water In
Internal Pump
(From Water Loop)
COAX
Refrigerant Out
(Cooling)
Leaving
Air
Entering Air
Reheat
Coil
Evaporator Coil
NOTE: All components shown are
internal to the heat pump unit.
Fig. 34 — HWR Schematic
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1. Restore power to system.
2. Turn thermostat fan position to ON. Blower should start.
3. Balance airflow at registers.
Deluxe D Control Accessory Relay Configura-
tions — The following accessory relay settings are applica-
ble for Deluxe D control:
CYCLE WITH FAN — In this configuration, the accessory
relay 1 will be ON any time the Fan Enable relay is on.
4. Adjust all valves to the full open position and turn on the
line power to all heat pump units.
CYCLE WITH COMPRESSOR — In this configuration, the
accessory relay 2 will be ON any time the Compressor relay
is on.
DIGITAL NIGHT SET BACK (NSB) — In this configura-
tion, the relay will be ON if the NSB input is connected to
ground C.
NOTE: If there are no relays configured for digital NSB, then
the NSB and override (OVR) inputs are automatically config-
ured for mechanical operation.
5. Operate unit in the cooling cycle. Refer to Table 14 for
unit operating limits.
NOTE: Three factors determine the operating limits of a unit:
(1) entering air temperature, (2) water temperature and (3)
ambient temperature. Whenever any of these factors are at a
minimum or maximum level, the other two factors must be at a
normal level to ensure proper unit operation. See Table 18.
Table 18 — Operating Limits —
50PSH, PSV, PSD Units
MECHANICAL NIGHT SET BACK — When NSB input is
connected to ground C, all thermostat inputs are ignored. A
thermostat set back heating call will then be connected to the
OVR input. If OVR input becomes active, then the Deluxe D
control will enter night low limit (NLL) staged heating mode.
The NLL staged heating mode will then provide heating dur-
ing the NSB period.
WATER VALVE (SLOW OPENING) — If relay is configured
for Water Valve (slow opening), the relay will start 60 seconds
prior to starting compressor relay.
AIR LIMITS
Min. Ambient Air
Rated Ambient Air
Max. Ambient Air
COOLING (F)
HEATING (F)
45
80.6
110
50
80/67
110/83
39
68
85
40
68
80
Min. Entering Air
Rated Entering Air db/wb
Max. Entering Air db/wb
WATER LIMITS
Min. Entering Water
Normal Entering Water
Max. Entering Water
30
50-110
120
20
30-70
90
OUTSIDE AIR DAMPER (OAD) — If relay is configured for
OAD, the relay will normally be ON any time the Fan Enable
relay is energized. The relay will not start for 30 minutes fol-
lowing a return to normal mode from NSB, when NSB is no
longer connected to ground C. After 30 minutes, the relay will
start if the Fan Enable is set to ON.
LEGEND
db
wb
—
—
Dry Bulb
Wet Bulb
NOTE: Value in heating column is dry bulb only. Any wet bulb reading is
acceptable.
Scroll Compressor Rotation — It is important to be
certain compressor is rotating in the proper direction. To
determine whether or not compressor is rotating in the proper
direction:
1. Connect service gages to suction and discharge pressure
fittings.
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.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start-up.
START-UP
If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:
1. Turn off power to the unit. Install disconnect tag.
2. Reverse any two of the unit power leads.
3. Reapply power to the unit and verify pressures are correct.
The suction and discharge pressure levels should now move
to their normal start-up levels.
When the compressor is rotating in the wrong direction, the
unit makes more noise and does not provide cooling.
After a few minutes of reverse operation, the scroll com-
pressor internal overload protection will open, thus activating
the unit lockout. This requires a manual reset. To reset, turn the
thermostat on and then off.
Use the procedure outlined below to initiate proper unit
start-up.
NOTE: This equipment is designed for indoor installation only.
Operating Limits
ENVIRONMENT — This equipment is designed for indoor
installation ONLY. Extreme variations in temperature, humidi-
ty and corrosive water or air will adversely affect the unit per-
formance, reliability and service life.
POWER SUPPLY — A voltage variation of ± 10% of name-
plate utilization voltage is acceptable.
UNIT STARTING CONDITIONS — Units start and operate
in an ambient temperature of 45 F with entering-air tempera-
ture at 50 F, entering-water temperature at 60 F and with both
air and water at the flow rates used.
NOTE: These operating limits are not normal or continuous
operating conditions. Assume that such a start-up is for the
purpose of bringing the building space up to occupancy tem-
perature. See Table 18 for operating limits.
NOTE: There is a 5-minute time delay before the compressor
will start.
Unit Start-Up Cooling Mode
1. Adjust the unit thermostat to the warmest position.
Slowly reduce the thermostat position until the compres-
sor activates.
2. Check for cool air delivery at unit grille a few minutes
after the unit has begun to operate.
WARNING
3. Verify that the compressor is on and that the water flow
rate is correct by measuring pressure drop through the
heat exchanger using P/T plugs. See Table 19. Check the
elevation and cleanliness of the condensate lines; any
dripping could be a sign of a blocked line. Be sure the
condensate trap includes a water seal.
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. Failure
to heed this warning may result in personal injury.
35
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4. Check the temperature of both supply and discharge
water. Compare to Tables 20-30. If temperature is within
range, proceed. If temperature is outside the range, check
the cooling refrigerant pressures in Tables 20-30.
5. Check air temperature drop across the coil when com-
pressor is operating. Air temperature drop should be
between 15 and 25 F.
Unit Start-Up Heating Mode
NOTE: Operate the unit in heating cycle after checking the
cooling cycle. Allow 5 minutes between tests for the pressure
or reversing valve to equalize.
1. Turn thermostat to lowest setting and set thermostat
switch to HEAT position.
2. Slowly turn the thermostat to a higher temperature until
the compressor activates.
Table 19 — Water Temperature Change
through Heat Exchanger
3. Check for warm air delivery at the unit grille within a few
minutes after the unit has begun to operate.
COOLING
RISE (F)
HEATING
DROP (F)
4. Check the temperature of both supply and discharge
water. Compare to Tables 20-30. If temperature is within
range, proceed. If temperature is outside the range, check
the heating refrigerant pressures in Tables 20-30.
5. Once the unit has begun to run, check for warm air deliv-
ery at the unit grille.
WATER FLOW RATE (GPM)
Min
Max
Min
Max
For Closed Loop: Ground Source or
Cooling/Boiler Systems at 3 gpm/ton
9
12
4
8
For Open Loop: Ground Water Systems at
1.5 gpm/ton
20
26
10
17
6. Check air temperature rise across the coil when compres-
sor is operating. Air temperature rise should be between
20 and 30 F after 15 minutes at load.
7. Check for vibration, noise and water leaks.
Table 20 — 50PSH, PSV, PSD006 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
Water
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Suction Discharge Super-
Sub-
cooling
(F)
Air Temp Suction Discharge Super-
Sub-
cooling
(F)
Air Temp
Temp
Rise
(F)
Temp
Drop
(F)
Pressure Pressure
heat
(F)
Drop
Pressure Pressure
heat
(F)
Rise
(F)
(psig)
(psig)
(F) DB
(psig)
(psig)
(F) DB
1.5
2.25
3
114-124
111-121
109-119
142-162
132-152
122-142
24-29
26-31
28-33
3-8
3-8
3-8
15.2-17.2
11.4-13.4
7.5-9.5
17-23
17-23
17-23
75-85
78-88
81-91
272-292
274-294
276-296
13-18
13-18
13-18
4- 9
4- 9
4- 9
5.9- 7.9
4.3- 6.3
2.7- 4.7
16-22
16-22
17-23
30
50
1.5
2.25
3
130-140
129-139
128-138
190-210
180-200
170-190
14-19
16-21
19-24
2-7
2-7
2-7
16.5-18.5
12.3-14.3
8.00-10.0
18-24
18-24
18-24
104-114
112-122
120-130
299-319
304-324
308-328
12-17
12-17
12-17
6-11
4- 9
3- 8
8.8-10.8
6.7- 8.7
4.5- 6.5
21-27
22-28
23-29
1.5
2.25
3
143-153 265-285
9-14
10-15
11-16
2-7
2-7
2-7
15.5-17.5
11.5-13.5
7.5-9.5
18-24
18-24
18-24
129-139
144-154
159-169
321-341
330-350
340-360
11-16
13-18
15-20
7-12
4- 9
3- 8
11.2-13.2
8.8- 10.8
6.3- 8.3
25-31
27-33
28-34
70
141-151
140-150
252-272
240-260
1.5
2.25
3
149-159 340-370
8-13
8-13
8-13
2-7
2-7
2-7
14.2-16.2
10.6-12.6
7.00-9.00
17-23
17-23
17-23
163-173
180-190
198-208
349-369
360-380
372-392
13-18
11-16
10-15
7-12
4- 9
3- 8
14.3-16.3
11.2-13.2
8.1-10.1
30-36
32-38
34-40
90
149-159
148-158
335-355
320-340
1.5
2.25
3
154-164
154-164
153-163
451-471
428-448
405-425
8-13
8-13
8-13
2-7
2-7
2-7
12.7-14.7
9.5-11.5
6.5-8.5
15-21
15-21
15-21
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
Table 21 — 50PSH, PSV, PSD009 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
Water
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Suction Discharge Super-
Sub-
cooling
(F)
Air Temp Suction Discharge Super-
Sub-
cooling
(F)
Air Temp
Rise
(F) DB
Temp
Rise
(F)
Temp
Drop
(F)
Pressure Pressure
heat
(F)
Drop
Pressure Pressure
heat
(F)
(F)
(psig)
(psig)
(F) DB
(psig)
(psig)
1.5
2.25
3
126-136
126-136
126-136
161-181
146-166
131-151
17-22
17-22
17-22
8-13
7-12
6-11
19.8-21.8
14.9-16.9
9.9-11.9
21-27
21-27
21-27
74-84
77-87
79-89
278-298
280-300
283-303
6-11
6-11
6-11
4-9
4-9
3-8
6.1-8.1
4.5-6.5
2.8-4.8
18-24
18-24
19-25
30
50
1.5
2.25
3
132-142
132-142
132-142
215-235
200-220
185-205
10-15
10-15
10-15
8-13
7-12
6-11
18.8-20.8
14.1-16.1
9.4-11.4
20-26
20-26
20-26
104-114
106-116
108-118
309-329
312-332
315-335
8-12
8-12
8-12
7-12
7-12
7-12
9.6-11.6
7.0-9.0
4.5-6.5
24-30
24-30
25-31
1.5
2.25
3
138-148
138-148
137-147
278-298
263-283
248-268
8-13
8-13
8-13
9-14
8-13
7-12
17.7-19.7
13.1-15.1
8.5-10.5
19-25
19-25
19-25
127-137
132-142
138-148
332-352
340-360
347-367
10-15
11-16
13-18
10-15
10-15
10-15
12.0-14.0
9.0-10
6.1-8.1
29-35
29-35
30-36
70
1.5
2.25
3
142-152
142-152
142-152
365-385
351-371
337-357
8-13
8-13
8-13
9-14
8-13
7-12
16.0-18.0
12.0-14.0
8.0-10.0
18-24
18-24
18-24
164-174
165-175
167-177
372-392
375-395
379-399
17-22
18-23
19-24
13-18
13-18
13-18
14.5-16.5
11.2-13.2
7.9-9.9
35-41
35-41
36-42
90
1.5
2.25
3
150-160
150-160
150-160
439-459
439-459
439-459
7-12
7-12
7-12
9-14
8-13
7-12
14.2-16.2
10.6-12.6
6.9-8.9
17-23
17-23
17-23
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
36
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Table 22 — 50PSH, PSV, PSD012 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
Water
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Suction Discharge Super-
Sub-
cooling
(F)
Air Temp Suction Discharge Super-
Sub-
cooling
(F)
Air Temp
Temp
Rise
(F)
Temp
Drop
(F)
Pressure Pressure
heat
(F)
Drop
Pressure Pressure
heat
(F)
Rise
(F)
(psig)
(psig)
(F) DB
(psig)
(psig)
(F) DB
1.5
2.25
3
98-108
98-108
99-109
140-160
135-155
127-148
36-41
36-41
36-41
14-19
12-17
10-15
17.1-19.1
12.5-14.5
7.9-9.9
19-25
19-25
19-25
72-82
85-95
78-88
301-321
304-324
308-328
9-14
9-14
9-14
12-17
12-17
12-17
6.5-8.5
4.7-6.7
2.9-4.9
21-27
21-27
22-28
30
50
1.5
2.25
3
118-128
118-128
118-128
215-235
200-220
185-205
22-27
22-27
22-27
14-19
12-17
10-15
18.1-20.1
13.1-15.1
8.1-10.1
20-26
20-26
19-25
100-110
98-108
95-105
337-357
334-354
332-352
10-15
10-15
11-16
15-20
15-20
15-20
9.5-11.5
6.6-8.6
3.8-5.8
26-32
26-32
26-32
1.5
2.25
3
132-142
132-142
132-142
300-320
263-282
245-265
11-16
11-16
12-17
12-17
10-15
7-12
17.0-19.0
12.6-14.6
8.2-10.2
19-25
19-25
19-25
115-125
112-122
110-120
361-381
360-380
356-376
19-24
20-25
21-26
18-23
18-23
18-23
11.1-13.1
8.0-10.0
4.8-6.8
29-35
29-35
29-35
70
1.5
2.25
3
138-148
138-148
138-148
366-386
353-373
340-360
9-14
9-14
9-14
11-16
9-14
6-11
15.8-17.8
14.9-16.9
14.0-16.0
18-24
18-24
18-24
122-132
123-133
124-134
376-396
378-398
380-400
34-39
36-41
38-43
22-27
22-27
23-28
12.1-14.1
9.0-11.0
5.8-7.8
32-38
32-38
32-38
90
1.5
2.25
3
145-155
145-155
145-155
453-473
442-462
431-451
9-14
9-14
9-14
9-14
7-12
5-10
14.7-16.7
10.8-12.8
6.8-8.8
16-22
16-22
17-23
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
Table 23 — 50PSH, PSV, PSD018 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Water
Temp
Drop
(F)
Suction
Pressure
(psig)
Discharge Super-
Sub-
Air Temp
Drop
Suction
Pressure
(psig)
Discharge Super-
Sub-
Air Temp
Rise
(F) DB
Temp
Rise
(F)
Pressure
(psig)
heat cooling
Pressure
(psig)
heat cooling
(F)
(F)
(F)
(F) DB
(F)
(F)
1.5
2.25
3
120-130
120-130
120-130
155-175
142-162
128-148
27-32
27-32
27-32
11-16 16.9-19.9
9-14 12.5-14.5
16-22
17-23
17-23
73- 83
75- 85
78- 88
268-288
270-290
272-292
8-13
8-13
8-13
4- 9
4- 9
4- 9
6.1- 8.1
4.4- 6.4
2.9- 4.9
15-21
16-22
16-22
30
50
9-14
8.1-10.1
1.5
2.25
3
137-147
137-147
137-147
220-240
206-226
192-212
16-21
16-21
16-21
10-15 17.0-19.0
8-13 12.6-14.6
16-22
17-23
17-23
102-112
106-116
110-120
295-315
297-317
299-319
8-13
8-13
8-13
8-13
8-13
8-13
9.1-11.1
6.9- 8.9
4.7- 6.7
20-26
21-27
21-27
8-13
8.4-10.4
1.5
2.25
3
142-152
142-152
142-152
287-307
273-239
259-279
7-12
7-12
7-12
10-15 15.9-17.9
8-13 11.8-13.8
16-22
17-23
17-23
131-141
137-147
144-154
324-344
326-346
328-348
9-14
9-14
9-14
10-15 12.1-14.1
25-33
26-34
26-34
10-15
10-15
9.3-11.3
6.6- 8.6
70
8-13
7.8- 9.8
1.5
2.25
3
146-156
146-156
146-156
375-395
361-381
347-367
6-11
6-11
6-11
10-15 14.9-16.9
8-13 11.0-13.0
16-22
17-23
17-23
174-184
180-190
187-197
360-380
367-387
374-394
10-15
11-16
12-17
12-17 15.8-17.8
12-17 11.9-13.9
32-40
33-41
33-41
90
8-13
7.2- 9.2
12-17
8.0-10.0
1.5
2.25
3
154-164
154-164
154-164
478-498
461-481
445-465
6-11
6-11
6-11
10-15 14.0-16.0
8-13 10.2-12.2
16-22
16-22
16-22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
8-13
6.5- 8.5
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
Table 24 — 50PSH, PSV, PSD024 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Water
Temp
Drop
(F)
Suction
Discharge Super-
Sub-
Air Temp
Drop
Suction Discharge Super-
Sub-
Air Temp
Rise
(F) DB
Temp
Rise
(F)
Pressure Pressure
heat cooling
Pressure Pressure
heat cooling
(F)
(psig)
(psig)
(F)
(F)
(F) DB
(psig)
(psig)
(F)
(F)
1.5
2.25
3
115-125
115-125
115-125
154-174
141-161
127-147
40-45
40-45
40-45
8-13
6-11
6-11
16.5-18.5
12.1-14.1
77.7- 9.7
19-25
20-26
20-26
73- 83
75- 85
78- 88
283-303
285-305
287-307
8-12
8-12
8-12
6-11
6-11
6-11
5.9- 7.9
4.2- 6.2
2.7- 4.7
16-22
17-23
18-24
30
50
1.5
2.25
3
115-120
115-120
115-120
209-229
195-215
181-201
24-29
24-29
24-29
10-15
8-13
8-13
15.7-17.7
11.6-13.6
7.6- 9.6
18-24
18-24
18-24
102-112
106-116
110-120
313-333
314-334
316-336
8-12
8-12
8-12
8-13
8-13
8-13
8.9-10.9
6.7- 8.7
4.5- 6.5
22-28
23-29
23-29
1.5
2.25
3
136-146
136-146
136-146
275-295
261-281
247-267
6-11
6-11
6-11
6-11
5-10
4- 9
15.7-17.7
11.6-13.6
7.6- 9.6
18-24
18-24
18-24
128-138
134-144
141-151
340-360
342-362
344-364
9-14
9-14
9-14
9-14
9-14
9-14
11.3-13.3
8.5-10.5
5.8- 7.8
27-34
28-35
28-35
70
1.5
2.25
3
140-150
140-150
140-150
361-381
347-367
333-353
6-11
6-11
6-11
6-11
5-10
4- 9
14.9-16.9
11.0-13.0
7.2- 9.2
18-24
18-24
18-24
162-172
166-176
171-181
370-390
376-396
383-403
14-19
15-20
16-21
9-14
9-14
9-14
14.4-16.4
10.8-12.8
7.1- 9.1
32-40
34-42
34-42
90
1.5
2.25
3
144-154
144-154
144-154
460-480
445-465
428-448
6-11
6-11
6-11
6-11
4- 9
4- 9
13.9-15.9
10.2-12.2
6.5- 8.5
17-23
17-23
17-23
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
37
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 25 — 50PSH, PSV, PSD030 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
Water
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Suction
Discharge Super-
Sub-
Air Temp
Drop
Suction Discharge Super-
Sub-
Air Temp
Rise
Temp
Rise
(F)
Temp
Drop
(F)
Pressure Pressure
heat cooling
Pressure Pressure
heat cooling
(F)
(psig)
(psig)
(F)
(F)
(F) DB
(psig)
(psig)
(F)
(F)
(F) DB
1.5
2.25
3
116-126
115-125
115-125
146-166
138-158
128-148
27-32
27-32
27-32
7-13
6-11
6-11
19.6-21.6
14.3-16.3
8.0-10.0
16-22
17-23
17-23
69- 79
73- 83
76- 86
275-295
277-297
279-299
7-12
7-12
7-12
6-11
6-11
6-11
7.2- 9.2
5.4- 7.4
3.5- 5.5
16-22
17-23
17-23
30
50
1.5
2.25
3
129-139
128-138
128-138
217-237
203-223
189-209
12-17
12-17
12-17
6-11
5-10
5-10
20.8-22.8
15.0-17.0
9.2-11.2
17-23
18-24
18-24
96-106
100-110
105-115
300-320
304-324
309-329
10-15
10-15
10-15
9-14
9-14
9-14
10.5-12.5
7.6- 9.6
4.8- 6.8
21-27
22-28
22-28
1.5
2.25
3
132-142
131-141
131-141
293-313
274-294
256-276
9-14
9-14
9-14
6-11
5-10
5-10
20.1-22.1
14.4-16.4
8.6-10.6
17-23
18-24
18-24
123-133
129-139
135-145
327-347
333-353
339-359
11-16
11-16
11-16
11-16
11-16
11-16
13.2-15.2
9.8-11.8
6.4- 8.4
25-32
26-33
27-34
70
1.5
2.25
3
137-147
137-147
137-147
383-403
362-382
342-362
7-12
7-12
7-12
5-10
5-10
5-10
19.4-21.4
13.8-15.8
8.2-10.2
16-22
16-22
16-22
155-165
162-172
169-179
355-375
362-382
369-389
13-18
14-19
16-21
11-16
11-16
11-16
16.8-18.8
12.7-14.7
8.6-10.6
30-38
31-39
32-40
90
1.5
2.25
3
143-153
143-153
143-153
475-495
457-477
439-459
6-11
6-11
6-11
9-14
6-11
6-11
18.2-20.2
13.0-14.0
7.7- 9.7
16-22
16-22
16-22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
Table 26 — 50PSH, PSV, PSD036 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Water
Temp
Drop
(F)
Suction Discharge Super-
Sub-
Air Temp
Drop
Suction Discharge Super-
Sub-
Air Temp
Rise
(F) DB
Temp
Rise
(F)
Pressure Pressure
heat cooling
Pressure Pressure
heat cooling
(F)
(psig)
(psig)
(F)
(F)
(F) DB
(psig)
(psig)
(F)
(F)
1.5
2.25
3
117-127
116-126
116-126
142-162
134-154
124-144
33-38
33-38
33-38
8-14
7-12
7-12
19.1-21.1
13.8-15.8
7.4- 9.4
15-22
15-22
15-22
69- 79
73- 83
76- 86
276-296
278-298
280-300
10-15
10-15
10-15
10-15
10-15
10-15
7.2- 9.2
5.3- 7.3
3.5- 5.5
17-23
18-24
18-24
30
50
1.5
2.25
3
136-146
136-146
136-146
211-231
197-217
183-203
11-16
11-16
11-16
6-11
5-10
5-10
20.6-22.6
14.8-16.8
9.0-11.0
17-23
17-23
17-23
99-109
103-113
108-118
302-322
306-326
311-331
10-15
10-15
10-15
13-18
13-18
13-18
10.6-12.6
7.7- 9.7
5.0- 7.0
22-28
23-29
23-29
1.5
2.25
3
137-147
137-147
137-147
275-295
260-280
245-265
9-14
9-14
9-14
10-15
9-14
9-14
19.0-21.0
13.8-15.8
8.0-10.0
18-24
19-25
19-25
127-137
133-143
139-149
332-352
338-358
344-364
10-15
10-15
10-15
15-20
15-20
15-20
13.5-15.5
10.1-12.1
6.7- 8.7
27-34
28-35
29-36
70
1.5
2.25
3
142-152
142-152
142-152
373-393
352-372
332-352
7-12
8-13
8-13
10-15
6-11
6-11
19.5-21.5
13.9-15.9
8.3-10.3
17-23
17-23
17-23
164-174
172-182
181-191
365-385
372-392
379-399
11-16
11-16
12-17
15-20
15-20
15-20
17.4-19.4
13.2-15.2
9.0-11.0
34-42
35-43
36-44
90
1.5
2.25
3
147-157
147-157
147-157
467-487
448-468
430-450
6-11
6-11
6-11
10-15
8-13
7-12
16.2-18.2
11.9-13.9
7.6- 9.6
16-22
16-22
16-22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
Table 27 — 50PSH, PSV, PSD042 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Water
Temp
Drop
(F)
Suction
Pressure
(psig)
Discharge Super-
Sub-
Air Temp
Drop
Suction
Pressure
(psig)
Discharge Super-
Sub-
Air Temp
Rise
(F) DB
Temp
Rise
(F)
Pressure
(psig)
heat cooling
Pressure
(psig)
heat cooling
(F)
(F)
(F)
(F) DB
(F)
(F)
1.5
2.25
3
114-124
113-123
113-123
170-190
150-170
131-151
27-32
27-32
27-32
10-15 17.2-19.2
9-14 12.7-14.7
17-23
17-23
17-23
69- 79
72- 82
75- 85
286-306
289-309
292-312
5-10
5-10
6-11
5-10
6-11
6-11
4.5- 6.5
3.9- 5.9
3.2- 5.2
16-22
17-23
18-24
30
50
7-12
8.2-10.2
1.5
2.25
3
130-140
129-139
129-139
226-246
208-228
190-210
10-15
10-15
10-15
6-11 17.8-19.8
5-10 13.3-15.3
20-26
20-26
20-26
100-110
105-115
110-120
315-335
322-342
330-350
7-12
8-13
10-15
6-11
6-11
7-12
9.0-11.0
7.0- 9.0
5.0- 7.0
22-28
23-29
24-30
4- 9
8.8-10.8
1.5
2.25
3
132-142
131-141
131-141
290-310
273-293
255-275
6-11
6-11
6-11
6-11 17.3-19.3
5-10 12.8-14.8
19-25
19-25
19-25
131-141
138-148
145-155
347-367
358-378
369-389
11-16
13-18
16-21
6-11 13.4-15.4
8-13 10.0-12.0
29-35
30-36
31-37
70
4- 9
8.3-10.3
9-14
6.9- 8.9
1.5
2.25
3
136-146
135-145
135-145
370-390
350-370
330-350
6-11
6-11
6-11
6-11 16.0-18.0
5-10 11.8-13.8
17-23
17-23
17-23
175-185
177-187
180-190
393-413
401-421
409-429
19-24
20-25
22-27
7-12 17.6-19.6
9-14 13.2-15.2
36-42
37-43
38-44
90
4- 9
7.6- 9.6
12-17
8.7-10.7
1.5
2.25
3
143-153
142-152
141-151
469-489
448-468
427-447
6-11
6-11
6-11
6-11 14.0-16.0
5-10 11.0-13.0
16-22
16-22
16-22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
4- 9
7.0- 9.0
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
38
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 28 — 50PSH, PSV, PSD048 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
Water
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Suction
Discharge Super-
Sub-
Air Temp
Drop
Suction Discharge Super-
Sub-
Air Temp
Rise
Temp
Rise
(F)
Temp
Drop
(F)
Pressure Pressure
heat cooling
Pressure Pressure
heat cooling
(F)
(psig)
(psig)
(F)
(F)
(F) DB
(psig)
(psig)
(F)
(F)
(F) DB
1.5
2.25
3
108-118
107-117
107-117
180-200
161-181
142-162
27-32
28-33
29-34
12-17
10-15
9-14
19.8-21.8
14.8-16.8
9.8-11.8
19-25
19-25
19-25
65- 75
68- 78
72- 82
293-313
297-217
301-321
7-12
8-13
9-14
9-14
9-14
9-14
8.2-10.2
6.2- 8.2
4.2- 6.2
17-23
18-24
19-25
30
50
1.5
2.25
3
123-133
122-132
122-132
236-256
218-238
200-220
16-21
17-22
17-22
8-13
7-12
6-11
20.2-22.2
15.2-18.2
10.2-12.2
21-27
21-27
21-27
92-102
100-110
108-118
321-341
330-350
340-360
10-15
11-16
12-17
11-16
11-16
11-16
11.6-13.6
8.9-10.9
6.0- 8.0
23-29
24-30
26-32
1.5
2.25
3
130-140
129-139
129-139
305-325
285-305
265-285
10-15
11-16
11-16
8-13
6-11
5-10
20.0-22.0
15.0-17.0
10.0-12.0
20-26
20-26
20-26
122-132
133-143
144-154
353-373
365-385
378-398
12-17
14-19
16-21
11-16
11-16
11-16
15.0-17.0
11.5-13.5
8.0-10.0
29-35
31-37
33-39
70
1.5
2.25
3
133-143
132-142
132-142
390-410
368-388
345-365
8-13
9-14
9-14
8-13
6-11
5-10
19.0-21.0
14.0-16.0
9.0-11.0
19-25
19-25
19-25
166-176
173-183
181-191
397-417
407-727
417-437
16-21
18-23
19-24
9-14
9-14
10-15
19.5-21.5
14.7-16.7
9.9-11.9
37-43
38-44
40-46
90
1.5
2.25
3
141-151
140-150
140-150
497-517
472-492
447-467
6-11
7-12
8-13
8-13
6-11
5-10
18.0-20.0
13.5-15.5
8.7-10.7
18-24
18-24
18-24
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
Table 29 — 50PSH, PSV, PSD060 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Water
Temp
Drop
(F)
Suction
Pressure
(psig)
Discharge Super-
Sub-
Air Temp
Drop
Suction
Pressure
(psig)
Discharge Super-
Sub-
Air Temp
Rise
(F) DB
Temp
Rise
(F)
Pressure
(psig)
heat cooling
Pressure
(psig)
heat cooling
(F)
(F)
(F)
(F) DB
(F)
(F)
1.5
2.25
3
98-108
97-107
96-106
160-180
149-169
137-157
40-45
41-46
42-48
12-17 20.0-22.0
12-17 14.3-16.3
19-25
19-25
20-26
62- 72
66- 76
70- 80
276-296
280-300
284-304
6-11
6-11
7-12
6-11
6-11
6-11
8.0-10.0
6.0- 8.0
4.0- 6.0
17-23
18-24
19-25
30
50
11-16
8.5-10.5
1.5
2.25
3
118-128
117-127
115-125
225-245
210-230
195-215
36-41
37-42
38-43
11-16 21.2-23.2
10-15 15.7-17.7
9-14 10.2-12.2
19-25
20-26
21-27
88- 98
94-104
100-110
306-326
311-331
317-337
10-15
10-15
11-16
8-13 11.0-13.0
8-13
9-14
23-29
24-30
25-31
8.3-10.3
5.5- 7.5
1.5
2.25
3
135-145
133-143
132-142
300-320
285-305
270-290
12-17
14-19
16-21
9-14 20.3-22.3
8-13 15.0-17.0
7-12 10.0-12.0
21-27
21-27
22-28
112-122
122-132
130-140
333-353
342-362
351-371
12-17
14-19
15-20
10-15 14.0-16.0
10-15 10.5-12.5
28-34
30-36
32-38
70
11-16
7.3- 9.3
1.5
2.25
3
139-149
138-148
138-148
390-410
370-390
350-370
8-13
8-13
8-13
7-12 19.3-21.3
6-11 14.3-16.3
20-26
21-27
21-27
147-157
154-164
160-170
369-389
377-397
385-405
15-20
18-23
19-24
10-15 17.7-19.7
10-15 13.4-15.4
36-42
37-43
38-44
90
6-11
9.3-11.3
11-16
9.0-11.0
1.5
2.25
3
144-154
143-153
142-152
488-508
468-488
448-468
8-13
7-12
7-12
8-13 18.4-20.4
6-11 13.6-15.6
21-27
21-27
21-27
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
5-10
8.8-10.8
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
Table 30 — 50PSH, PSV, PSD070 Typical Unit Operating Pressures and Temperatures
FULL LOAD COOLING — WITHOUT HWG ACTIVE
Water
FULL LOAD HEATING — WITHOUT HWG ACTIVE
ENTERING
WATER
TEMP
WATER
FLOW
(GPM/ton)
Water
Temp
Drop
(F)
Suction Discharge Super-
Sub-
Air Temp
Drop
Suction Discharge Super-
Sub-
Air Temp
Rise
(F) DB
Temp
Rise
(F)
Pressure Pressure
heat cooling
Pressure Pressure
heat cooling
(F)
(psig)
(psig)
(F)
(F)
(F) DB
(psig)
(psig)
(F)
(F)
1.5
2.25
3
110-120
109-119
107-117
177-197
162-182
147-167
36-41
37-42
38-43
15-20
13-18
11-16
20.2-22.2
15.0-17.0
9.7-11.7
21-27
21-27
22-28
61- 71
65- 75
68- 78
290-310
292-312
296-316
12-18
12-18
12-18
9-14
10-15
10-15
8.0-10.0
6.0- 8.0
4.0- 6.0
19-25
20-26
21-27
30
50
1.5
2.25
3
128-138
128-138
127-137
246-266
228-248
210-230
18-23
19-24
20-25
11-16
9-14
6-11
21.0-23.0
15.6-17.6
10.2-12.2
22-28
23-29
24-30
88- 98
96-106
105-115
320-340
330-350
338-358
11-17
11-17
11-17
13-18
11-16
9-14
11.7-13.7
9.0-11.0
6.0- 8.0
26-32
27-33
29-35
1.5
2.25
3
134-144
133-143
131-141
305-325
289-309
273-293
9-14
9-14
9-14
11-16
9-14
6-11
20.8-22.8
15.4-17.4
10.0-12.0
23-29
23-29
23-29
118-128
130-140
141-151
355-375
368-388
380-400
10-16
12-18
15-21
14-19
13-18
11-16
15.2-17.2
11.7-13.7
8.0-10.0
33-39
35-41
37-43
70
1.5
2.25
3
140-150
139-149
138-148
390-410
373-393
355-375
10-15
10-15
10-15
11-16
9-14
6-11
19.6-21.6
14.5-16.5
9.3-11.3
22-28
22-28
22-28
158-168
168-178
178-188
401-421
412-432
423-443
9-15
10-16
12-18
13-18
12-17
12-17
19.5-21.5
14.8-16.8
10.0-12.0
41-47
43-49
45-51
90
1.5
2.25
3
144-154
143-153
142-152
488-508
468-488
448-468
10-15
10-15
9-14
9-14
6-11
5-10
18.4-20.4
13.6-15.6
8.8-10.8
20-27
20-27
20-27
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
110
LEGEND
DB
HWG
—
—
—
—
Dry Bulb
Hot Water Generator
No Heating Operation in This Temperature Range
39
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b. To program the beginning and end dates, scroll
down to the beginning month and press the enter
key. The softkeys (INCR and DECR) will activate
to increment the month in either direction, Jan,
Feb, March, etc.
c. Use number keys to select the day of month and
year.
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 Auto-
mation 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 set-
tings that can be adjusted if required by unique job conditions.
Refer to Appendix A — WSHP Open Screen Configuration. In
order to configure the unit, a BACview6 display is required. See
Fig. 35.
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.
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.
Only the following settings will need to be
checked.
• # of Fan Speeds — This should be set to "1" for
units with PSC motors and set to "3" for units with
ECM motors.
• Compressor Stages — This should be set to "1."
• Factory Dehumidification Reheat Coil — This
should be set to "none" unless the modulating hot
water reheat option is supplied in the unit, then set
to "installed."
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.
To start-up a unit with WSHP Open controls:
1. To plug in the BACview6 handheld display into a SPT
sensor, point the two ears on the connector up and tilt the
bottom of the plug toward you. Insert the plug up into the
SPT sensor while pushing the bottom of the plug away
from you.
2. BACview6 should respond with "Establishing Connec-
tion." The Home screen will then appear on the display
showing operating mode and space temperature. Press
any button to continue.
• The condenser water limit needs to be verified
depending on design parameters and application,
whether geothermal or boiler/tower.
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
• Fan Delay:
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.
• 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:
8. To set local schedules:
a. Select System Settings from the Home screen, then
press Clockset.
a. Select the Schedule softkey from the Configuration
screen, then press enter.
b. Scroll to hour, minute and second using the arrow
keys. Use the number keypad to set actual time.
b. Select Weekly, then press enter (7 schedules
available).
c. Scroll to day, month and year using arrow keys.
Use number keypad to set date.
5. To set Daylight Savings Time (DST):
c. Select day and press enter.
d. Press enter again and select ADD or DEL (DECR
or INCR) set schedule.
a. Push the DST softkey. The display will indicate
02:00:060 which is equal to 2:00AM.
e. Enter ON/OFF time, then press continue.
a50-8444
Fig. 35 — BACview6 Display Interface
*Sponsored by ASHRAE (American Society of Heating, Refrigerat-
ing and Air Conditioning Engineers).
40
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f. Press OK to apply and save to a particular day of
the week.
WARNING
g. Continue to add the same or different schedule spe-
cific days of the week.
To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position before flushing system.
To add exceptions to the schedule:
i. Press Add softkey.
Flushing — Once the piping is complete, units require final
purging and loop charging. A flush cart pump of at least 1.5 hp
is needed to achieve adequate flow velocity in the loop to purge
air and dirt particles from the loop. Flush the loop in both direc-
tions with a high volume of water at a high velocity. Follow the
steps below to properly flush the loop:
ii. Select exception type from following:
• Date
• Date Range
• Week-N-Day
• Calender Reference
9. Go back to Home Screen.
10. Remove BACview6 cable from SPT sensor by reversing
the process in Step 1.
11. Perform system test.
1. Verify power is off.
2. Fill loop with water from hose through flush cart before
using flush cart pump to ensure an even fill. Do not allow
the water level in the flush cart tank to drop below the
pump inlet line in order to prevent air from filling the line.
3. Maintain a fluid level in the tank above the return tee in
order to avoid air entering back into the fluid.
4. Shutting off the return valve that connects into the flush
cart reservoir will allow 50 psig surges to help purge air
pockets. This maintains the pump at 50 psig.
Flow Regulation — Flow regulation can be accom-
plished by two methods. Most water control valves have a flow
adjustment built into the valve. By measuring the pressure drop
through the unit heat exchanger, the flow rate can be deter-
mined. See Table 31. Adjust the water control valve until the
flow of 1.5 to 2 gpm is achieved. Since the pressure constantly
varies, two pressure gages may be needed in some
applications.
5. To purge, keep the pump at 50 psig until maximum
pumping pressure is reached.
6. Open the return valve to send a pressure surge through
the loop to purge any air pockets in the piping system.
7. A noticeable drop in fluid level will be seen in the flush
cart tank. This is the only indication of air in the loop.
Table 31 — 50PSH, PSV, PSD Coaxial
Water Pressure Drop
WATER TEMPERATURE (F)
WATER
FLOW
(GPM)
50PSH, PSV, PSD
30 F
50 F
70 F
90 F
NOTE: If air is purged from the system while using a
10 in. PVC flush tank, the level drop will only be 1 to
2 in. since liquids are incompressible. If the level drops
more than this, flushing should continue since air is still
being compressed in the loop. If level is less than 1 to
2 in., reverse the flow.
UNIT SIZE
Pressure Drop (psi)
1.0
1.5
2.0
1.4
2.1
2.8
1.8
2.6
3.5
2.8
4.1
5.5
4.0
6.0
8.0
4.0
6.0
8.0
4.5
6.8
9.0
5.5
8.3
11.0
6.0
9.0
12.0
7.5
11.3
15.0
8.3
12.4
16.5
0.3
1.6
3.0
0.8
1.5
2.7
0.6
2.1
3.8
0.7
2.1
3.5
1.5
3.1
5.1
1.5
3.1
5.1
1.7
3.3
5.7
1.1
2.2
3.9
1.3
2.6
4.5
0.6
2.3
4.8
2.4
5.2
8.0
0.3
1.4
2.6
0.7
1.4
2.4
0.5
1.9
3.4
0.5
1.7
2.8
1.3
2.6
4.3
1.3
2.6
4.3
1.3
3.1
5.2
0.9
2.1
3.6
1.1
2.5
4.2
0.4
2.1
4.3
2.0
4.5
7.0
0.2
1.2
2.2
0.6
1.2
2.2
0.4
1.6
3.0
0.3
1.4
2.4
1.1
2.3
3.8
1.1
2.3
3.8
1.1
2.9
4.8
0.8
2.0
3.2
1.0
2.3
3.8
0.3
2.0
3.9
1.7
4.0
6.3
0.2
1.0
1.8
0.6
1.1
1.9
0.3
1.4
2.6
0.2
1.1
2.0
1.0
2.1
3.4
1.0
2.1
3.4
0.9
2.6
4.4
0.7
1.8
3.1
0.9
2.2
3.5
0.2
1.8
3.5
1.6
3.8
6.0
006
009
012
018
024
030
036
042
048
060
070
8. Repeat this procedure until all air is purged.
9. Restore power.
Antifreeze may be added before, during, or after the flush-
ing process. However, depending on when it is added in the
process, it can be wasted. Refer to the Antifreeze section for
more detail.
Loop static pressure will fluctuate with the seasons. Pres-
sures will be higher in the winter months than during the warm-
er months. This fluctuation is normal and should be considered
when charging the system initially. Run the unit in either
heating or cooling for several minutes to condition the loop to a
homogenous temperature.
When complete, perform a final flush and pressurize the
loop to a static pressure of 40 to 50 psig for winter months or
15 to 20 psig for summer months.
After pressurization, be sure to remove the plug from the
end of the loop pump motor(s) to allow trapped air to be
discharged and to ensure the motor housing has been flooded.
Be sure the loop flow center provides adequate flow through
the unit by checking pressure drop across the heat exchanger.
Compare the results to the data in Table 31.
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 leav-
ing loop temperature would be 22 to 25 F. Therefore, the freeze
protection should be at 15 F (30 F – 15 F = 15 F).
An alternative method is to install a flow control device.
These devices are typically an orifice of plastic material de-
signed to allow a specified flow rate that are mounted on the
outlet of the water control valve. Occasionally these valves
produce a velocity noise that can be reduced by applying some
back pressure. To accomplish this, slightly close the leaving
isolation valve of the well water setup.
41
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Units with Aquazone™ Complete C Control
STANDBY — Y and W terminals are not active in Standby
mode, however the O and G terminals may be active, depend-
ing on the application. The compressor will be off.
IMPORTANT: All alcohols should be pre-mixed and
pumped from a reservoir outside of the building or
introduced under water level to prevent fuming.
Calculate the total volume of fluid in the piping system. See
Table 32. Use the percentage by volume in Table 33 to deter-
mine the amount of antifreeze to use. Antifreeze concentration
should be checked from a well-mixed sample using a hydrom-
eter to measure specific gravity.
COOLING — Y and O terminals are active in Cooling mode.
After power up, the first call to the compressor will initiate a
5 to 80 second random start delay and a 5-minute anti-short
cycle protection time delay. After both delays are complete, the
compressor is energized.
FREEZE PROTECTION SELECTION — The 30 F FP1
factory setting (water) should be used to avoid freeze damage
to the unit.
Once antifreeze is selected, the JW3 jumper (FP1) should
be clipped on the control to select the low temperature (anti-
freeze 13 F) set point to avoid nuisance faults.
NOTE: On all subsequent compressor calls the random start
delay is omitted.
HEATING STAGE 1 — Terminal Y is active in heating
stage 1. After power up, the first call to the compressor will
initiate a 5 to 80 second random start delay and a 5-minute
anti-short cycle protection time delay. After both delays are
complete, the compressor is energized.
NOTE: On all subsequent compressor calls the random start
delay is omitted.
HEATING STAGE 2 — To enter Stage 2 mode, terminal W is
active (Y is already active). Also, the G terminal must be
active or the W terminal is disregarded. The compressor relay
will remain on and EH1 is immediately turned on. EH2 will
turn on after 10 minutes of continual stage 2 demand.
Table 32 — Approximate Fluid Volume (gal.)
per 100 Ft of Pipe
PIPE
DIAMETER (in.)
VOLUME (gal.)
Copper
1
1.25
1.5
4.1
6.4
9.2
Rubber Hose
Polyethylene
1
3.9
3/4 IPS SDR11
1 IPS SDR11
11/4 IPS SDR11
1/2 IPS SDR11
2 IPS SDR11
11/4 IPS SCH40
11/2 IPS SCH40
2 IPS SCH40
2.8
4.5
8.0
10.9
18.0
8.3
10.9
17.0
NOTE: EH2 will not turn on (or if on, will turn off) if FP1 tem-
perature is greater than 45 F and FP2 is greater than 110 F.
LOCKOUT MODE — The status LED will flash fast in
Lockout mode and the compressor relay will be turned off
immediately. Lockout mode can be “soft” reset via the Y input
or can be “hard” reset via the disconnect. The last fault causing
the lockout is stored in memory and can be viewed by entering
test mode.
LOCKOUT WITH EMERGENCY HEAT — While in Lock-
out mode, if W becomes active, then Emergency Heat mode
will occur.
EMERGENCY HEAT — In Emergency Heat mode, terminal
W is active while terminal Y is not. Terminal G must be active
or the W terminal is disregarded. EH1 is immediately turned
on. EH2 will turn on after 5 minutes of continual emergency
heat demand.
LEGEND
IPS
— Internal Pipe Size
SCH — Schedule
SDR — Standard Dimensional Ratio
NOTE: Volume of heat exchanger is approximately 1.0 gallon.
Table 33 — Antifreeze Percentages by Volume
MINIMUM TEMPERATURE FOR
FREEZE PROTECTION (F)
ANTIFREEZE
Methanol (%)
10
15
20
25
25
21
16
10
100% USP Food Grade
38
29
30
25
22
20
15
14
Propylene Glycol (%)
Units with Aquazone Deluxe D Control
Ethanol (%)
EXTENDED COMPRESSOR OPERATION MONITOR —
If the compressor has been on for 4 continuous hours the con-
trol will automatically turn off the compressor relay and wait
the short cycle time protection time. All appropriate safeties,
including the low-pressure switch, will be monitored. If all
operations are normal and the compressor demand is still
present, the control will turn the compressor back on.
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.
Cooling Tower/Boiler Systems — These systems
typically use a common loop temperature maintained at 60 to
95 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. Locate air separation in the piping sys-
tem prior to the fluid re-entering the loop field.
NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1
and Fan 2 outputs.
HEATING STAGE 1 — In Heating Stage 1 mode, the Fan
Enable and Compressor relays are turned on immediately.
Once the demand is removed, the relays are turned off and the
control reverts to Standby mode. If there is a master/slave or
dual compressor application, all compressor relays and related
functions will operate per their associated DIP switch 2 setting
on S1.
HEATING STAGE 2 — In Heating Stage 2 mode, the Fan
Enable and Compressor relays are remain on. The Fan Speed
relay is turned on immediately and turned off immediately
once the demand is removed. The control reverts to Heating
Stage 1 mode. If there is a master/slave or dual compressor
OPERATION
Power Up Mode — The unit will not operate until all the
inputs, terminals and safety controls are checked for normal
operation.
NOTE: The compressor will have a 5-minute anti-short cycle
upon power up.
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application, all compressor relays and related functions will
operate per their associated DIP switch 2 setting on S1.
D control board will bring the unit on in Heating Stage 2.
When the call is satisfied at the thermostat the unit will con-
tinue to run in Heating Stage 1 until the call is removed or
satisfied, shutting down the unit.
HEATING STAGE 3 — In Heating Stage 3 mode, the Fan
Enable, Fan Speed and Compressor relays remain on. The EH1
output is turned on immediately. With continuing Heat Stage 3
demand, EH2 will turn on after 10 minutes. EH1 and EH2 are
turned off immediately when the Heating Stage 3 demand is re-
moved. The control reverts to Heating Stage 2 mode.
The output signal EH2 will be off if FP1 is greater than 45 F
AND FP2 (when shorted) is greater than 110 F during Heating
Stage 3 mode. This condition will have a 30-second
recognition time. Also, during Heating Stage 3 mode, EH1,
EH2, Fan Enable, and Fan Speed will be ON if G input is not
active.
EMERGENCY HEAT — In Emergency Heat mode, the Fan
Enable and Fan Speed relays are turned on. The EH1 output is
turned on immediately. With continuing Emergency Heat de-
mand, EH2 will turn on after 5 minutes. Fan Enable and Fan
Speed relays are turned off after a 60-second delay. The control
reverts to Standby mode.
NOTE: Not all units have two-stage heating functionality.
REHEAT MODE — A call from the humidistat/dehumidis-
tat to the (H) terminal of the Deluxe D control board will
bring the unit on in Reheat mode if there is no call for cool-
ing at the thermostat. When the humidistat/dehumidistat call
is removed or satisfied the unit will shut down.
NOTE: Cooling always overrides Reheat mode. In the
Cooling mode, the unit cools and dehumidifies. If the cool-
ing thermostat is satisfied but there is still a call for dehu-
midification, the unit will continue to operate in Reheat
mode.
Units with WSHP Open Multiple Protocol —
The WSHP Open multi-protocol controller will control me-
chanical cooling, heating and waterside economizer outputs
based on its own space temperature input and set points. An
optional CO2 IAQ (indoor air quality) sensor mounted in the
space can maximize the occupant comfort. The WSHP Open
controller has its own hardware clock that is automatically set
when the heat pump software is downloaded to the board. Oc-
cupancy types are described in the scheduling section below.
The following sections describe the functionality of the WSHP
Open multi-protocol controller. All point objects referred to in
this sequence of operation will be referenced to the objects as
viewed in the BACview6 handheld user interface.
SCHEDULING — Scheduling is used to start/stop the unit
based on a time period to control the space temperature to spec-
ified occupied heating and cooling set points. The controller is
defaulted to control by occupied set points all the time, until ei-
ther a time schedule is configured with BACview6, Field Assis-
tant, i-Vu® Open, or a third party control system to enable/dis-
able the BAS (Building Automation System) on/off point. The
local time and date must be set for these functions to operate
properly. The occupancy source can be changed to one of the
following:
Occupancy Schedules — The controller will be occupied 24/7
until a time schedule has been configured using either Field
Assistant, i-Vu Open, BACview6 or a third party control system
to enable/disable the BAS on/off point. The BAS point can be
disabled by going to Config, then Unit, then Occupancy Sched-
ules and changing the point from enable to disable then click-
ing OK.
NOTE: This point must be enabled in order for the i-Vu Open,
Field Assistant, or BACview6 control system to assign a time
schedule to the controller.
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.
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.
COOLING STAGE 2 — In Cooling Stage 2 mode, the Fan
Enable, compressor and RV relays remain on. The Fan Speed
relay is turned on immediately and turned off immediately
once the Cooling Stage 2 demand is removed. The control
reverts to Cooling Stage 1 mode. If there is a master/slave or
dual compressor application, all compressor relays and related
functions will track with their associated DIP switch 2 on S1.
NIGHT LOW LIMIT (NLL) STAGED HEATING — In NLL
staged Heating mode, the override (OVR) input becomes ac-
tive and is recognized as a call for heating and the control will
immediately go into a Heating Stage 1 mode. With an addition-
al 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.
Units with HWR Option
FAN ONLY — A (G) call from the thermostat to the (G)
terminal of the Deluxe D control board will bring the unit
on in fan only mode.
COOLING STAGE 1 — A simultaneous call from (G),
(Y1), and (O) to the (G), (Y1), (O/W2) terminals of the
Deluxe D control board will bring the unit on in Cooling
Stage 1.
COOLING STAGE 2 — A simultaneous call from (G),
(Y1), (Y2), and (O) to the (G), (Y1), (Y2), and (O/W2) ter-
minals of the Deluxe D control board will bring the unit on
in Cooling Stage 2. When the call is satisfied at the thermo-
stat the unit will continue to run in Cooling Stage 1 until the
Cooling Stage 1 call is removed or satisfied, shutting down
the unit.
NOTE: Not all units have two-stage cooling functionality.
HEATING STAGE 1 — A simultaneous call from (G) and
(Y1) to the (G) and (Y1) terminals of the Deluxe D control
board will bring the unit on in Heating Stage 1.
HEATING STAGE 2 — A simultaneous call from (G), (Y1),
and (Y2) to the (G), (Y1), and (Y2) terminals of the Deluxe
NOTE: Scheduling can only be controlled from one source.
BAS (Building Automation System) On/Off
—
A
BAS
system that supports network scheduling can control the unit
through a network communication and the BAS scheduling
function once the Occupancy Schedules have been disabled.
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NOTE: Scheduling can either be controlled via the unit or the
BAS, but not both.
INDOOR FAN — The indoor fan will operate in any one of
three modes depending on the user configuration selected.
Fan mode can be selected as Auto, Continuous, or Always
On. In Auto mode, the fan is in intermittent operation during
both occupied and unoccupied periods. Continuous fan mode
is intermittent during unoccupied periods and continuous dur-
ing occupied periods. Always On mode operates the fan con-
tinuously during both occupied and unoccupied periods. In the
default mode, Continuous, the fan will be turned on whenever
any one of the following is true:
• Heating mode is not active and the compressor time
guard has expired.
• Condensate overflow input is normal.
• If occupied, the SPT is greater than the occupied cooling
set point.
• Space temperature reading is valid.
• If unoccupied, the SPT is greater than the unoccupied
cooling set point.
• If economizer cooling is available and active and the
economizer alone is insufficient to provide enough cool-
ing.
• OAT (if available) is greater than the cooling lockout
temperature.
If all the above conditions are met, the compressors will be
energized as required, otherwise they will be deenergized. If
cooling is active and should the SAT approach the minimum
SAT limit, the fan will be indexed to the next higher speed.
Should this be insufficient and if the SAT falls further (equal to
the minimum SAT limit), the fan will be indexed to the maxi-
mum speed. If the SAT continues to fall 5F below the mini-
mum SAT limit, all cooling stages will be disabled.
During Cooling mode, the reversing valve output will be
held in the cooling position (either B or O type as configured)
even after the compressor is stopped. The valve will not switch
position until the Heating mode is required.
• The unit is in occupied mode as determined by its occu-
pancy status.
• There is a demand for cooling or heating in the unoccu-
pied mode.
• There is a call for dehumidification (optional).
When power is reapplied after a power outage, there will be
a configured time delay of 5 to 600 seconds before starting the
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.
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
Automatic Fan Speed Control — The WSHP Open controller
is capable of controlling up to three fan speeds using the ECM
(electronically commutated motor). The motor will operate at
the lowest speed possible to provide quiet and efficient fan op-
eration with the best latent capability. The motor will increase
speed if additional cooling or heating is required to obtain the
desired space temperature set point. The control increases the
motor's speed as the space temperature rises above the cooling
or below the heating set point. The amount of space tempera-
ture increase above or below the set point required to increase
the fan speed is user configurable in the set point. Also, the
control will increase the fan speed as the supply-air tempera-
ture approaches the configured minimum or maximum limits.
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.
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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.
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.
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
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.
DEHUMIDIFCATION — The WSHP Open controller will
provide occupied and unoccupied dehumidification only on
units that are equipped with the modulating hot water reheat
(HWR) option. This function requires an accessory space rela-
tive humidity sensor. When using a relative humidity sensor to
control dehumidification during occupied or unoccupied times,
the dehumidification set points are used accordingly. When the
indoor relative humidity becomes greater than the dehumidifi-
cation set point, a dehumidification demand will be acknowl-
edged. Once acknowledged, the dehumidification output will
be energized, bringing on the supply fan (medium speed), me-
chanical cooling, and the integral hot water reheat coil. The
controls will engage Cooling mode and waste heat from the
compressor cooling cycle will be returned to the reheat coil si-
multaneously, meaning that the reversing valve is causing the
compressor to operate in the Cooling mode. During Cooling
mode, the unit cools, dehumidifies, and disables the HWR coil;
however, once the call for cooling has been satisfied and there
is still a call for dehumidification, the unit will continue to op-
erate using the Reheat mode and HWR coil.
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.
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
Single Stage Electric Auxiliary Heat — The control can op-
erate a field-installed single stage of electric heat installed on
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screen. The following conditions must be true for economizer
operation:
• SAT reading is available.
• LWT reading is available.
controller (UC) open loop controller. Loop pump operation is
automatically controlled by WSHP equipment occupancy
schedules, 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
unoccupied heating or cooling demand, or a tenant pushbutton
override. At each WSHP, the water loop temperature and the
loop pump status is given. The WSHP will NOT start a com-
pressor until the loop pumps are running or will shutdown the
compressors should the pumps stop. This prevents the WSHP
from operating without water flow and thus tripping out on re-
frigerant 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 opera-
tion (from 1-"N"). This can be used to prevent starting the en-
tire loop operation 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.
• 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.
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.
Test mode provides the ability to check the control opera-
tion in a timely manner. The control enters a 20-minute test
mode by momentarily shorting the test terminals. All time de-
lays are sped up 15 times. The follow operations are common
to both Complete C and Deluxe D controls.
Test Mode — To enter Test mode, cycle the power 3 times
within 60 seconds. The LED 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 34 and 35.
To exit Test mode, short the terminals for 3 seconds or cycle
the power 3 times within 60 seconds.
NOTE: The flashing code and alarm relay cycling code will
both have the same numerical label. For example, flashing
code 1 will have an alarm relay cycling code 1. Code 1 indi-
cates the control has not faulted since the last power off to
power on sequence.
Table 34 — Complete C Control Current LED
Status and Alarm Relay Operations
LED STATUS
DESCRIPTION OF OPERATION
ALARM RELAY
Normal Mode
Open
On
Cycle (closed 5 sec.,
open 25 sec.)
Normal Mode with PM Warning
Off
Slow Flash
Fast Flash
Complete C Control is non-functional
Open
Open
Closed
Fault Retry
Lockout
Open, (Closed after
15 minutes)
Slow Flash
Over/Under Voltage Shutdown
Flashing Code 1
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
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
Cycling Code 1
Cycling Code 2
Cycling Code 3
Cycling Code 4
Cycling Code 5
Cycling Code 6
Test Mode — Over/Under
shutdown in memory
Test Mode — PM in memory
Test Mode — FP1/FP2
Swapped Fault in memory
Flashing Code 7
Flashing Code 8
Flashing Code 9
Cycling Code 7
Cycling Code 8
Cycling Code 9
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.
LEGEND
CO
FP
HP
—
—
—
Condensate Overflow
Freeze Protection
High Pressure
LED
LP
PM
—
—
—
Light-Emitting Diode
Low Pressure
Performance Monitor
NOTES:
1. Slow flash is 1 flash every 2 seconds.
2. Fast flash is 2 flashes every 1 second.
3. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a
CONDENSER WATER LINKAGE — The control pro-
vides optimized water loop operation using an universal
10-second pause. This sequence will repeat continually until the fault is cleared.
46
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Table 35 — Complete C Control LED Code and
Fault Descriptions
AUXILIARY HEATING TEST — Tests auxiliary heat.
Sequences fan on and enables heating coil for 1 minute.
H2O ECONOMIZER TEST — Tests entering/returning
water loop economizer operation. Sequences fan and opens
economizer water valve for one minute.
LED CODE
1
FAULT
No fault in memory
DESCRIPTION
There has been no fault since the
last power-down to power-up
sequence
OPEN VENT DAMPER 100% TEST — Tests outside air
(OA) damper operation.
PREPOSITION OA DAMPER — Prepositions OA damper
actuator to set proper preload.
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.
2
3
High-Pressure Switch
Low-Pressure Switch
HP switch opens instantly
LP switch opens for 30 continu-
ous seconds before or during a
call (bypassed for first
60 seconds)
4
5
Freeze Protection Coax —
FP1
FP1 below Temp limit for
30 continuous seconds (bypassed
for first 60 seconds of operation)
Freeze Protection Air Coil — FP2 below Temp limit for
FP2
30 continuous seconds (bypassed
for first 60 seconds of operation)
Sense overflow (grounded) for
30 continuous seconds
“R” power supply is <19VAC or
>30VAC
Performance Monitor Warning
has occurred.
FP1 temperature is higher than
FP2 in heating/test mode, or FP2
temperature is higher than FP1 in
cooling/test mode.
6
7
Condensate overflow
Over/Under Voltage
Retry Mode — In Retry mode, the status LED will start to
flash slowly to signal that the control is trying to recover from
an input fault. The control will stage off the outputs and try to
again satisfy the thermostat used to terminal Y. Once the ther-
mostat input calls are satisfied, the control will continue normal
operation.
(Autoreset) Shutdown
8
PM Warning
9
FP1 and FP2
Thermistors are swapped
LEGEND
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.
FP
—
—
—
Freeze Protection
High Pressure
Light-Emitting Diode
LP
PM
—
—
Low Pressure
Performance Monitor
HP
LED
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.
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 D control. The Status LED light is green.
TEST LED — Test LED will be activated any time the 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 one fast flash alternating with a 10-second pause. See
Table 36.
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.
Table 36 — Aquazone™ Deluxe D Control Current LED Status and Alarm Relay Operations
STATUS LED
(Green)
TEST LED
(Yellow)
DESCRIPTION
Normal Mode
FAULT LED (Red)
Flash Last Fault Code in Memory
Flashing Code 8
ALARM RELAY
On
Off
Open
Cycle (closed 5 sec,
open 25 sec, …)
Normal Mode with PM
On
Off
Deluxe D Control
is non-functional
Off
Off
Off
Open
Test Mode
Night Setback
ESD
Invalid T-stat Inputs
No Fault in Memory
HP Fault
—
On
—
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
LP Fault
FP1 Fault
FP2 Fault
CO Fault
Flashing Code 3
Open
Flashing Code 4
Open
Flashing Code 5
Open
Flashing Code 6
Open
Over/Under Voltage
HP Lockout
LP Lockout
FP1 Lockout
FP2 Lockout
CO Lockout
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
NOTES:
1. If there is no fault in memory, the Fault LED will flash code 1.
2. Codes will be displayed with a 10-second Fault LED pause.
3. Slow flash is 1 flash every 2 seconds.
CO
ESD
FP
—
—
—
Condensate Overflow
Emergency Shutdown
Freeze Protection
HP
LP
PM
—
—
—
High Pressure
Low Pressure
Performance Monitor
4. Fast flash is 2 flashes every 1 second.
5. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by
a 10-second pause. This sequence will repeat continually until the fault is
cleared.
47
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SERVICE
Compressor — Conduct annual amperage checks to en-
sure that amp draw is no more than 10% greater than indicated
on the serial plate data.
Perform the procedures outlined below periodically, as
indicated.
Fan Motors — All units have lubricated fan motors. Fan
motors should never be lubricated unless obvious, dry opera-
tion is suspected. Periodic maintenance oiling is NOT recom-
mended as it will result in dirt accumulating in the excess oil
and cause eventual motor failure. Conduct annual dry opera-
tion check and amperage check to ensure amp draw is no more
than 10% greater than indicated on serial plate data.
WARNING
To prevent injury or death due to electrical shock or contact
with moving parts, open unit disconnect switch before ser-
vicing unit.
IMPORTANT: When a compressor is removed from this
unit, system refrigerant circuit oil will remain in the com-
pressor. To avoid leakage of compressor oil, the refrigerant
lines of the compressor must be sealed after it is removed.
Condensate Drain Cleaning — Clean the drain line
and unit drain pan at the start of each cooling season. Check
flow by pouring water into drain. Be sure trap is filled to main-
tain an air seal.
Air Coil Cleaning — Remove dirt and debris from evap-
orator coil as required by condition of the coil. Clean coil with
a stiff brush, vacuum cleaner, or compressed air. Use a fin
comb of the correct tooth spacing when straightening mashed
or bent coil fins.
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.
Condenser Cleaning — Water-cooled condensers may
require cleaning of scale (water deposits) due to improperly
maintained closed-loop water systems. Sludge build-up may
need to be cleaned in an open water tower system due to
induced contaminants.
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.
Local water conditions may cause excessive fouling or
pitting of tubes. Condenser tubes should therefore be cleaned at
least once a year, or more often if the water is contaminated.
Filters — Filters must be clean for maximum performance.
Inspect filters every month under normal operating conditions.
Replace when necessary.
Proper water treatment can minimize tube fouling and
pitting. If such conditions are anticipated, water treatment
analysis is recommended. Refer to the Carrier System Design
Manual, Part 5, for general water conditioning information.
IMPORTANT: Units should never be operated without
a filter.
Water Coil — Keep all air out of the water coil. Check
open loop systems to be sure the well head is not allowing air
to infiltrate the water line. Always keep lines airtight.
Inspect heat exchangers regularly, and clean more frequent-
ly if the unit is located in a “dirty” environment. Keep the heat
exchanger full of water at all times. Open loop systems should
have an inverted P trap placed in the discharge line to keep
water in the heat exchanger during off cycles. Closed loop
systems must have a minimum of 15 psig during the summer
and 40 psig during the winter.
CAUTION
Follow all safety codes. Wear safety glasses and rubber
gloves when using inhibited hydrochloric acid solution.
Observe and follow acid manufacturer’s instructions.
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.
Check P trap frequently for proper operation.
CAUTION
Warm solution acts faster, but cold solution is just as effec-
tive if applied for a longer period.
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.
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. 36.
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. 37.
Regulate flow to condenser with a supply line valve. If
pump is a non overloading type, the valve may be fully closed
while pump is running.
Condensate Drain Pans — Check condensate drain
pans for algae growth twice a year. If algae growth is apparent,
consult a water treatment specialist for proper chemical treat-
ment. Applying an algaecide every three months will typically
eliminate algae problems in most locations.
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.
Check to see that unit is within the superheat and subcool-
ing temperature ranges shown in Tables 20-30. If the unit is not
within these ranges, recover and reweigh in refrigerant charge.
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.
48
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6. Compare the subcooling temperature with the normal
temperature listed in Tables 20-30. If the measured liquid
line temperature does not agree with the required liquid
line temperature, ADD refrigerant to raise the tempera-
ture or REMOVE refrigerant (using standard practices) to
lower the temperature (allow a tolerance of ± 3° F).
FILL CONDENSER WITH
CLEANING SOLUTION. DO
NOT ADD SOLUTION
MORE RAPIDLY THAN
VENT CAN EXHAUST
GASES CAUSED BY
PAIL
FUNNEL
CHEMICAL ACTION.
Refrigerant Charging
WARNING
1”
PIPE
VENT
PIPE
5’ APPROX
To prevent personal injury, wear safety glasses and gloves
when handling refrigerant. Do not overcharge system —
this can cause compressor flooding.
3’ TO 4’
CONDENSER
NOTE: Do not vent or depressurize unit refrigerant to atmo-
sphere. Remove and recover refrigerant following accepted
practices.
Air Coil Fan Motor Removal
CAUTION
PAIL
A50-6286
Before attempting to remove fan motors or motor mounts,
place a piece of plywood over evaporator coils to prevent
coil damage.
Fig. 36 — Gravity Flow Method
GAS VENT
PUMP
PRIMING
CONN.
Disconnect motor power wires from motor terminals before
motor is removed from unit.
GLOBE
VALVES
1. Shut off unit main power supply.
SUCTION
SUPPLY
2. Loosen bolts on mounting bracket so that fan belt can be
removed.
3. Loosen and remove the 2 motor mounting bracket bolts
on left side of bracket.
PUMP
SUPPORT
1” PIPE
CONDENSER
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.
TANK
REMOVE WATER
REGULATING VALVE
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.
RETURN
FINE MESH
SCREEN
A50-6287
Fig. 37 — Forced Circulation Method
NOTE: Power must be ON to the WSHP Open controller
when replacing the battery, or the date, time and trend data will
be lost.
1. Remove the battery from the controller, making note of
the battery's polarity.
Checking System Charge — Units are shipped with
full operating charge. If recharging is necessary:
1. Insert thermometer bulb in insulating rubber sleeve on
liquid line near filter drier. Use a digital thermometer for
all temperature measurements. DO NOT use a mercury
or dial-type thermometer.
2. Insert the new battery, matching the battery's polarity
with the polarity indicated on the WSHP Open controller.
2. Connect pressure gage to discharge line near compressor.
3. After unit conditions have stabilized, read head pressure
on discharge line gage.
NOTE: Operate unit a minimum of 15 minutes before
checking charge.
4. From standard field-supplied Pressure-Temperature chart
for R-410A, find equivalent saturated condensing
temperature.
TROUBLESHOOTING
When troubleshooting problems with a WSHP, consider the
following:
Control Sensors — The control system employs 2 nom-
inal 10,000 ohm thermistors (FP1 and FP2) that are used for
freeze protection. Be sure FP1 is located in the discharge fluid
and FP2 is located in the air discharge. See Fig. 38.
5. Read liquid line temperature on thermometer; then
subtract from saturated condensing temperature. The dif-
ference equals subcooling temperature.
Thermistor — A thermistor may be required for single-
phase units where starting the unit is a problem due to low
voltage. See Fig. 39 for thermistor nominal resistance.
49
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AIR
COIL
SUCTION
AIRFLOW
(°F)
AIRFLOW
(°F)
COMPRESSOR
THERMISTOR
EXPANSION
VALVE
COAX
DISCHARGE
FP2
FP1
CONDENSATE
OVERFLOW
(CO)
LIQUID
LINE
a50-8163
WATER IN
WATER OUT
AIR COIL
WATER
COIL
PROTECTION
FREEZE
PROTECTION
LEGEND
COAX — Coaxial Heat Exchanger
Airflow
Refrigerant Liquid Line Flow
Fig. 38 — FP1 and FP2 Thermistor Location
at the TXV sensing bulb. Correct superheat of the refrigerant is
important for the most efficient operation of the unit and for the
life of the compressor.
Packaged heat pumps typically use one bi-flow TXV to
meter refrigerant in both modes of operation. When diagnosing
possible TXV problems it may be helpful to reverse the refrig-
erant flow to assist with the diagnosis.
Geothermal and water source heat pumps are designed to op-
erate through a wide range of entering water temperatures that
will have a direct effect on the unit refrigerant operating pres-
sures. Therefore, diagnosing TXV problems can be difficult.
TXV FAILURE — The most common failure mode of a TXV
is when the valve fails while closed. Typically, a TXV uses
spring pressure to close the valve and an opposing pressure,
usually from a diaphragm, to open the valve. The amount of
pressure exerted by the diaphragm will vary, depending on the
pressure inside of the sensing bulb. As the temperature of and
pressure within the bulb decreases, the valve will modulate
closed and restrict the refrigerant flow through the valve. The
result is less refrigerant in the evaporator and an increase in the
superheat. As the temperature at the bulb increases the dia-
phragm pressure will increase, which opens the valve and
allows more refrigerant flow and a reduction in the superheat.
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0
20.0
40.0
60.0
80.0 100.0 120.0 140.0
Temperature (degF)
Fig. 39 — Thermistor Nominal Resistance
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.
If the sensing bulb, connecting capillary, or diaphragm
assembly are damaged, pressure is lost and the spring will force
the valve to a closed position. Often, the TXV will not close
completely so some refrigerant flow will remain, even if inade-
quate flow for the heat pump to operate.
The TXV sensing bulb must be properly located, secured,
and insulated as it will attempt to control the temperature of the
line to which it is connected. The sensing bulb must be located
on a dedicated suction line close to the compressor. On a pack-
aged heat pump, the bulb may be located almost any place on
the tube running from the compressor suction inlet to the
reversing valve. If the bulb is located on a horizontal section, it
should be placed in the 10:00 or 2:00 position for optimal
performance.
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.
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.
NOTE: Active faults can be viewed by scrolling down,
these faults indicate a possible bad sensor or some condi-
tion which may not merit an alarm.
3. To view alarms which have been corrected, scroll down
through the Alarm screen to Return Top Normal screen.
NOTE: Alarms are automatically reset once alarm con-
dition has been corrected.
CAUTION
See Table 37 for possible alarm cause and solution.
Use caution when tightening the strap. The strap must be
tight enough to hold the bulb securely but caution must be
taken not to over-tighten the strap, which could dent, bend,
collapse or otherwise damage the bulb.
Thermostatic Expansion Valves — Thermostat-
ic expansion valves (TXV) are used as a means of metering the
refrigerant through the evaporator to achieve a preset superheat
50
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The bulb must be secured to the pipe using a copper strap.
The use of heat transfer paste between the bulb and the pipe
will also help ensure optimum performance.
Diagnostics—Several tests may be required to determine if
a TXV has failed. The following tools may be required for
testing:
The bulb must also be properly insulated to eliminate any
influence on valve operation by the surrounding conditions.
Cork tape is the recommended insulation as it can be molded
tight to the bulb to prevent air infiltration.
1. Refrigerant gage manifold compatible with the refriger-
ant in the system
2. Digital thermometer, preferably insulated, with wire leads
that can be connected directly to the tubing
Causes of TXV Failure — The most common causes of TXV
failure are:
3. Refrigerant pressure-temperature chart for the refrigerant
used
1. A cracked, broken, or damaged sensing bulb or capillary
can be caused by excessive vibration of the capillary dur-
ing shipping or unit operation.
To determine that a TXV has failed, verify the following:
• The suction pressure is low and the valve is non-responsive.
The TXV sensing bulb can be removed from the suction
line and warmed by holding the bulb in your hand. This
action should result in an increase in the suction pressure
while the compressor is operating. The sensing bulb can
also be chilled by immersion in ice water, which should
result in a decrease in the suction pressure while the
compressor is operating. No change in the suction pres-
sure would indicate a nonresponsive valve.
If the sensing bulb is damaged or if the capillary is
cracked or broken, the valve will be considered failed and
must be replaced. Replacement of the TXV “power head”
or sensing bulb, capillary, diaphragm assembly is possible
on some TXVs. The power head assembly screws onto
most valves, but not all are intended to be replaceable. If
the assembly is not replaceable, replace the entire valve.
2. Particulate debris within the system can be caused by sev-
eral sources including contaminated components, tubing,
and service tools, or improper techniques used during
brazing operations and component replacement.
• Simultaneous LOW suction pressure, HIGH refrigerant
subcooling and HIGH superheat may indicate a failed
valve.
• LOW suction pressure, LOW subcooling and HIGH super-
heat may indicate an undercharge of refrigerant. HIGH sub-
cooling and LOW superheat may indicate an overcharge of
refrigerant. The suction pressure will usually be normal or
high if there is an overcharge of refrigerant.
• LOW suction pressure and frosting of the valve and/or
equalizer line may indicate a failed valve. However, these
symptoms may also indicate an undercharge of refrigerant.
Calculate the subcooling and superheat to verify a failed
valve or refrigerant charge issue.
Problems associated with particulate debris can be com-
pounded by refrigerant systems that use POE (polyol es-
ter oil). POE oil has solvent-like properties that will clean
the interior surfaces of tubing and components. Particu-
lates can be released from interior surfaces and may mi-
grate to the TXV strainer, which can lead to plugging of
the strainer.
3. Corrosive debris within the system may happen after a
failure, such as a compressor burn out, if system was not
properly cleaned.
Repair
4. Noncondensables may be present in the system. Non-
condensables includes any substance other than the
refrigerant or oil such as air, nitrogen, or water. Contami-
nation can be the result of improper service techniques,
use of contaminated components, and/or improper evacu-
ation of the system.
Symptoms — The symptoms of a failed TXV can be varied
and will include one or more of the following:
• Low refrigerant suction pressure
WARNING
Puron® refrigerant (R-410A) operates at higher pressure
than R-22, which is found in other WSHPs. Tools such as
manifold gages must be rated to withstand the higher pres-
sures. Failure to use approved tools may result in a failure
of tools, which can lead to severe damage to the unit, injury
or death.
• High refrigerant superheat
• High refrigerant subcooling
WARNING
• TXV and/or low pressure tubing frosting
• Equalizer line condensing and at a lower temperature than
the suction line or the equalizer line frosting
• FP1 faults in the heating mode in combination with any of
the symptoms listed above
• FP2 faults in the cooling mode in combination with any of
the symptoms listed above. Some symptoms can mimic a
failed TXV but may actually be caused be another problem.
Before conducting an analysis for a failed TXV the follow-
ing must be verified:
• Confirm that there is proper water flow and water tempera-
ture in the heating mode.
Most TXVs are designed for a fixed superheat setting and
are therefore considered non-adjustable. Removal of the
bottom cap will not provide access for adjustment and can
lead to damage to the valve or equipment, unintended vent-
ing of refrigerant, personal injury, or possibly death.
CAUTION
Use caution when tightening the strap. The strap must be
tight enough to hold the bulb securely but caution must be
taken not to over-tighten the strap, which could dent, bend,
collapse or otherwise damage the bulb.
• Confirm that there is proper airflow and temperature in the
cooling mode.
• Ensure coaxial water coil is clean on the inside; this applies
to the heating mode and may require a scale check.
• Refrigerant may be undercharged. To verify, subcooling and
superheat calculations may be required.
CAUTION
Puron refrigerant (R-410A) requires the use of synthetic
lubricant (POE oil). Do not use common tools on systems
that contain R-22 refrigerants or mineral oil. Contamina-
tion and failure of this equipment may result.
51
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IMPORTANT: Repair of any sealed refrigerant system
requires training in the use of refrigeration tools and proce-
dures. Repair should only be attempted by a qualified ser-
vice technician. A universal refrigerant handling certificate
will be required. Local and/or state license or certificate
may also be required.
IMPORTANT: Always recover the refrigerant from the
system with suitable approved tools, recovery equipment,
and practices prior to attempting to remove or repair any
TXV.
IMPORTANT: Due to the hygroscopic nature of the
POE oil in Puron refrigerant (R-410A) and other environ-
mentally sound refrigerants, any component replace-
ment must be conducted in a timely manner using
caution and proper service procedure for these types of
refrigerants. A complete installation instruction will be
included with each replacement TXV/filter drier assem-
bly. It is of critical importance these instructions are
carefully understood and followed. Failure to follow
these instructions can result in a system that is contami-
nated with moisture to the extent that several filter drier
replacements may be required to properly dry the
system.
See Tables 37-39 for additional troubleshooting
information.
CAUTION
Disconnect power from unit before removing or replacing
connectors, or servicing motor. Wait 5 minutes after dis-
connecting power before opening motor.
Table 37 — ECM Troubleshooting
FAULT
DESCRIPTION
SOLUTION
Motor rocks slightly when
starting
Motor will not start
This is normal start-up for ECM.
Check power at motor.
No movement
Check low voltage (24-vac R to C) at motor.
Check low voltage connections (G,Y, W, R, C) at motor.
Check for unseated pins in connectors on motor harness. See Fig. 40.
Test with a temporary jumper between R and G.
Check motor for tight shaft.
Perform motor/control replacement check.
Run moisture check. See Moisture Check section in Troubleshooting.
Check for loose or non-compliant motor mount.
Make sure blower wheel is tight on shaft.
Motor rocks
Perform motor/control replacement check.
Motor oscillates up and down
while being tested off of blower
It is normal for motor to oscillate with no load on shaft.
Motor starts, but runs erratically Varies up and down or intermittent Check line voltage for variation or “sag.”
Check low voltage connections (G,Y, W, R, C) at motor, unseated pins in motor harness
connectors. See Fig. 40.
Check “Bk” for erratic cfm command (in variable speed applications).
Check system controls, thermostat.
Perform moisture check. See Moisture Check section in Troubleshooting.
If removing panel or filter reduces “puffing,” reduce restriction or reduce maximum airflow.
“Hunts” or “puffs” at high cfm
(speed)
Stays at low cfm despite system
call for cool or heat cfm
Check low voltage (thermostat) wires and connections.
Verify fan is not in delay mode. Wait until delay is complete.
Check to see if “R” is missing/not connected at motor.
Perform motor/control replacement check.
Stays at high cfm
Check to see if “R” is missing/not connected at motor.
Verify fan is not in delay mode. Wait until delay is complete.
Perform motor/control replacement check.
Blower will not shut off
Noisy blower or cabinet
Check to see if there is current leakage from controls into G, Y, or W. Check for Triac switched
thermostat or solid state relay.
Excessive noise
Determine if it is air, cabinet, duct, or motor noise.
Check for loose blower housing, panels, etc.
If high static is creating high blower speed, check for air whistling through seams in ducts,
cabinets, or panels.
If high static is creating high blower speed, check for cabinet/duct deformation.
“Hunts” or “puffs” at high cfm
(speed)
If removing panel or filter reduces “puffing,” reduce restriction or reduce maximum airflow.
Evidence of moisture
Motor failure or malfunction has
occurred and moisture is present
Replace motor and perform moisture check. See Moisture Check section in Troubleshooting.
Perform moisture check. See Moisture Check section in Troubleshooting.
Evidence of moisture present
inside air mover
52
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a50-8448
Fig. 40 — ECM Pin Connectors
53
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Stopped or Malfunctioned ECM Motor — Refer
to Fig. 41 to determine the possible cause of a stopped or mal-
functioned ECM motor. Follow the instructions in the boxes.
a50-8447
Fig. 41 — ECM Troubleshooting Flow Diagram
54
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• Check if condensate drain is plugged.
• Check for low airflow (too much latent capacity).
• Check for undercharged condition.
Moisture Check — To perform moisture check:
• Check that connectors are orientated “down” (or as recom-
mended by equipment manufacturer).
• Arrange harnesses with “drip loop” under motor.
• Check and plug leaks in return ducts, cabinet.
Table 38 — Good Practices
DO
DO NOT
Check motor, controls wiring, and connections thoroughly before replac- Automatically assume the motor is bad.
ing motor.
Orient connectors down so water cannot get in. Install “drip loops.”
Locate connectors above 7 and 4 o’clock positions.
Use authorized motor and control model numbers for replacement.
Replace one motor or control model number with another (unless
replacement is authorized).
Keep static pressure to a minimum by:
Use high pressure drop filters.
Use restricted returns.
•
•
•
•
Using high efficiency, low-static filters.
Keeping filters clean.
Designing ductwork for minimum static and maximum comfort.
Improving ductwork when replacement is necessary.
Size equipment wisely.
Oversize system then compensate with low airflow.
Check orientation before inserting motor connectors.
Plug in power connector backwards.
Force plugs.
Table 39 — WSHP 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 cool- Check pump operation or valve operation/setting.
ing
Check water flow adjust to proper flow rate.
Water temperature out of range in Bring water temperature within design parameters.
cooling
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.
External static too high. Check blower performance per
Tables 11-13.
X
X
Air temperature out of range
in heating
Overcharged with refrigerant
Bring return-air temperature within design parameters.
X
Check superheat/subcooling vs typical operating condition per
Tables 20-30.
X
X
X
X
X
Bad HP switch
Insufficient charge
Compressor pump down at start- Check charge and start-up water flow.
up
Check switch continuity and operation. Replace.
Check for refrigerant leaks.
LP/LOC Fault — Code 3
Low Pressure/Loss of
Charge
FP1 Fault — Code 4
Water Freeze Protection
X
Reduced or no water flow
in heating
Check pump operation or water valve operation/setting.
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.
Check antifreeze density with hydrometer.
Clip JW2 jumper for antifreeze (10 F) use.
X
X
Inadequate antifreeze level
Improper freeze protect setting
(30 F vs 10 F)
X
X
Water temperature out of range
Bad thermistor
Reduced or no airflow in
cooling
Bring water temperature within design parameters.
Check temperature and impedance correlation.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
X
X
FP2 Fault — Code 5
Air Coil Freeze Protection
External static too high. Check blower performance per
Tables 11-13.
X
X
X
Air temperature out of range
Too much cold vent air. Bring entering air temperature within design
parameters.
Normal airside applications will require 30 F only.
Improper freeze protect setting
(30 F vs 10 F)
Bad thermistor
X
Check temperature and impedance correlation.
LEGEND
LED
RV
TXV
—
—
—
Light-Emitting Diode
Reversing Valve
Thermostatic Expansion Valve
55
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Table 39 — WSHP Troubleshooting (cont)
FAULT
Condensate Fault —
Code 6
HEATING COOLING
POSSIBLE CAUSE
Blocked drain
SOLUTION
Check for blockage and clean drain.
X
X
X
X
X
Improper trap
Poor drainage
Check trap dimensions and location ahead of vent.
Check for piping slope away from unit.
Check slope of unit toward outlet.
Poor venting. Check vent location.
X
X
Moisture on sensor
Under voltage
Check for moisture shorting to air coil.
Over/Under Voltage —
Code 7 (Auto Resetting)
X
Check power supply and 24 vac voltage before and during
operation.
Check power supply wire size.
Check compressor starting.
Check 24 vac and unit transformer tap for correct power supply
voltage.
X
X
X
X
Over voltage
Check power supply voltage and 24 vac before and during operation.
Check 24 vac and unit transformer tap for correct power supply
voltage.
Performance Monitor —
Code 8
Heating mode FP2>125 F
Check for poor airflow or overcharged unit.
Check for poor water flow or airflow.
X
X
Cooling mode FP1>125 F OR
FP2< 40 F
FP1 and FP2 Thermistors
— Code 9
FP1 temperature is higher
than FP2 temperature.
Swap FP1 and FP2 thermistors.
Swap FP1 and FP2 thermistors.
FP2 temperature is higher
than FP1 temperature.
No Fault Code Shown
X
X
X
X
X
X
X
X
No compressor operation
Compressor overload
Control board
See Scroll Compressor Rotation section.
Check and replace if necessary.
Reset power and check operation.
Reverse position of thermistors.
Swapped Thermistor —
Code 9
FP1 and FP2 swapped
Unit Short Cycles
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Dirty air filter
Check and clean air filter.
Unit in 'Test Mode'
Unit selection
Reset power or wait 20 minutes for auto exit.
Unit may be oversized for space. Check sizing for actual load of space.
Check and replace if necessary.
Compressor overload
Thermostat position
Unit locked out
Only Fan Runs
Ensure thermostat set for heating or cooling operation.
Check for lockout codes. Reset power.
Compressor overload
Thermostat wiring
Check compressor overload. Replace if necessary.
Check Y and W wiring at heat pump. Jumper Y and R for compressor
operation in Test mode.
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.
X
Fan motor relay
Jumper G and R for fan operation. Check for line voltage across BR
contacts.
Check fan power enable relay operation (if present).
Check for line voltage at motor. Check capacitor.
X
X
Fan motor
Unit Does Not Operate in
Cooling
Reversing valve
Set for cooling demand and check 24 vac on RV coil and at control.
If RV is stuck, run high pressure up by reducing water flow and while
operating, engage and disengage RV coil voltage to push valve.
X
X
X
Thermostat setup
Thermostat wiring
Dirty filter
Check for 'O' RV setup not 'B'.
Check O wiring at heat pump. Jumper O and R for RV coil 'Click'.
Replace or clean.
Insufficient Capacity/
Not Cooling or Heating
Properly
X
X
Reduced or no airflow in
heating
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance per
Tables 11-13.
X
X
Reduced or no airflow in
cooling
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance per
Tables 11-13.
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
Low refrigerant charge
Restricted metering device
Defective reversing valve
Check superheat and subcooling per Tables 20-30.
Check superheat and subcooling per Tables 20-30. Replace.
Set for cooling demand and check 24 vac on RV coil and at control.
If RV is stuck, run high pressure up by reducing water flow and while
operating, engage and disengage RV coil voltage to push valve.
X
X
X
X
Thermostat improperly located
Unit undersized
Check location and for air drafts behind thermostat.
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
X
X
X
X
Scaling in water heat exchanger Perform condenser cleaning.
Inlet water too hot or cold Check load, loop sizing, loop backfill, ground moisture.
LEGEND
LED
RV
TXV
—
—
—
Light-Emitting Diode
Reversing Valve
Thermostatic Expansion Valve
56
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Table 39 — WSHP Troubleshooting (cont)
FAULT
High Head Pressure
HEATING COOLING
POSSIBLE CAUSE
Reduced or no airflow in
heating
SOLUTION
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
X
External static too high. Check blower performance per
Tables 11-13.
X
X
Reduced or no water flow in cool- Check pump operation or valve operation/setting.
ing
Check water flow adjust to proper flow rate. See Tables 19 and 31.
Inlet water too hot
Check load, loop sizing, loop backfill, ground moisture.
Bring return-air temperature within design parameters.
X
Air temperature out of range in
heating
X
X
X
X
Scaling in water heat exchanger Perform condenser cleaning.
X
X
X
X
Unit overcharged
Check superheat and subcooling. Reweigh in charge.
Noncondensables in system
Restricted metering device
Remove refrigerant, evacuate system and charge unit.
Check superheat and subcooling per Tables 20-30. Replace.
Check pump operation or water valve operation/setting.
Plugged strainer or filter. Clean or replace.
Low Suction Pressure
Reduced water flow in
heating
Check water flow adjust to proper flow rate.
X
Water temperature out of range
Reduced airflow in cooling
Bring water temperature within design parameters.
Check for dirty air filter and clean or replace.
X
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance per
Tables 11-13.
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 performance per Tables 11-13.
See “Insufficient Capacity.”
Low Discharge Air
Temperature in Heating
High Humidity
X
X
Check blower performance per Tables 11-13.
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
Low Refrigerant Suction
Pressure
X
X
Normal operation
Reduced water flow
Check/compare with Tables 20-30.
Check pump operation.
Check strainer or filter.
Improper flow regulator. Replace flow regulator.
X
X
Water temperature out of range Bring water temperature within proper range.
Scaling in water to refrigerant Conduct water quality analysis.
heat exchanger
X
Reduced airflow
Check for dirty air filter.
Check for dirty air coil.
Check fan motor operation.
External static pressure exceeds fan operating parameters.
X
X
X
Return air temperature below Space temperature too cold. Increase space temperature.
minimum
Excessive fresh air. Reduce amount of fresh air exposure.
Supply air bypassing to return Check for leaking ductwork.
airstream (zone systems)
X
X
X
X
Insufficient refrigerant charge Locate and repair leak.
Improperly located TXV sens- Locate bulb on suction line between reversing valve and compressor.
ing bulb
X
X
Failed or restricted metering
device
Failed TXV power head, capillary or sensing bulb. Replace.
Plugged TXV strainer. Unplug TXV strainer.
High Refrigerant
Superheat
X
X
X
X
Insufficient refrigerant charge Locate and repair leak.
Improperly located TXV sens- Locate bulb on suction line between reversing valve and compressor.
ing bulb
X
X
Failed or restricted metering
device
Failed TXV power head, capillary or sensing bulb. Replace.
Plugged TXV strainer. Unplug TXV strainer.
High Refrigerant
Subcooling
X
X
X
X
Excessive refrigerant charge
Failed or restricted metering
device
Remove refrigerant as needed.
Failed TXV power head, capillary or sensing bulb. Replace.
Plugged TXV strainer. Unplug TXV strainer.
TXV and/or Low Pressure
Tubing Frosting
X
X
X
Normal operation
Insufficient refrigerant charge Locate and repair leak.
May occur when entering water temperature is close to minimum.
X
X
Failed or restricted metering
device
Failed TXV power head, capillary or sensing bulb. Replace.
Plugged TXV strainer. Unplug TXV strainer.
Equalizer Line
Condensing or Frosting
X
X
Failed or restricted metering
device
Failed TXV power head, capillary or sensing bulb. Replace.
Plugged TXV strainer. Unplug TXV strainer.
LEGEND
LED — Light-Emitting Diode
RV
— Reversing Valve
TXV — Thermostatic Expansion Valve
57
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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
58
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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
59
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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
60
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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
61
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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
62
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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
63
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Copyright 2009 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500055-01
Printed in U.S.A.
Form 50PS-3SI
Pg 66
7-09
Replaces: 50PS-2SI
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50PSH,PSV,PSD
START-UP CHECKLIST
CUSTOMER:___________________________
MODEL NO.:___________________________
JOB NAME: _______________________________________
SERIAL NO.:____________________
DATE:_________
I. PRE-START-UP
DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N)
HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS
TIGHT? (Y/N)
HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER?
(Y/N)
HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N)
HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)
IS AN AIR FILTER INSTALLED? (Y/N)
II. START-UP
IS FAN OPERATING WHEN COMPRESSOR OPERATES? (Y/N)
IF 3-PHASE SCROLL COMPRESSOR IS PRESENT, VERIFY PROPER ROTATION PER INSTRUCTIONS.
(Y/N)
UNIT VOLTAGE — COOLING OPERATION
PHASE AB VOLTS
PHASE BC VOLTS
(if 3 phase)
PHASE CA VOLTS
(if 3 phase)
PHASE AB AMPS
PHASE BC AMPS
(if 3 phase)
PHASE CA AMPS
(if 3 phase)
CONTROL VOLTAGE
IS CONTROL VOLTAGE ABOVE 21.6 VOLTS? (Y/N)
.
IF NOT, CHECK FOR PROPER TRANSFORMER CONNECTION.
TEMPERATURES
FILL IN THE ANALYSIS CHART ATTACHED.
COAXIAL HEAT COOLING CYCLE:
EXCHANGER
FLUID IN
F
F
F
F
FLUID OUT
FLUID OUT
AIR OUT
F
PSI
PSI
FLOW
FLOW
HEATING CYCLE:
FLUID IN
F
F
F
AIR COIL
COOLING CYCLE:
AIR IN
HEATING CYCLE:
AIR IN
AIR OUT
CL-1
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HEATING CYCLE ANALYSIS
PSI
°F
SAT
a50-8494
AIR
COIL
SUCTION
°F
°F
COMPRESSOR
DISCHARGE
EXPANSION
COAX
VALVE
°F
LIQUID LINE
°F
PSI
°F
PSI
FLUID IN
FLUID OUT
LOOK UP PRESSURE DROP IN TABLE 31
TO DETERMINE FLOW RATE
COOLING CYCLE ANALYSIS
PSI
°F
SAT
AIR
COIL
SUCTION
°F
°F
COMPRESSOR
DISCHARGE
EXPANSION
COAX
VALVE
°F
a50-8495
LIQUID LINE
°F
PSI
°F
PSI
FLUID IN
FLUID OUT
LOOK UP PRESSURE DROP IN TABLE 31
TO DETERMINE FLOW RATE
HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION =
FLOW RATE (GPM) x TEMP. DIFF. (DEG. F) x
FLUID FACTOR* =
(Btu/hr)
SUPERHEAT = SUCTION TEMPERATURE – SUCTION SATURATION TEMPERATURE
(DEG F)
=
SUBCOOLING = DISCHARGE SATURATION TEMPERATURE – LIQUID LINE TEMPERATURE
(DEG F)
=
*Use 500 for water, 485 for antifreeze.
97B0038N04
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. 04-53500055-01 Printed in U.S.A. Form 50PS-3SI Pg CL-2 7-09 Replaces: 50PS-2SI
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