Carrier AQUAZONE 50PCH Dimensions and installation guide

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500286-01 Printed in U.S.A. Form 50PC-C4SI Pg 1 11-2020 Replaces: 50PC-C3SI
Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GREENHOUSE GAS REGULATION . . . . . . . . . . . . . . 2
F-Gas Regulation (517/2014) . . . . . . . . . . . . . . . . . . . 2
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . 2
Installation Guidelines (All Units) . . . . . . . . . . . . . . . 2
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Step 3 — Locate Unit . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 — Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . 7
Step 5 — Check Duct System . . . . . . . . . . . . . . . . . . 8
Step 6 — Install Condensate Drain . . . . . . . . . . . . . . 9
Step 7 — Pipe Connections . . . . . . . . . . . . . . . . . . . . 9
Step 8 — Wire Field Power Supply . . . . . . . . . . . . . 13
Step 9 — Wire Control Connections . . . . . . . . . . . . 13
Step 10 — Wire Field Controls . . . . . . . . . . . . . . . . . 19
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Fan Motor Speeds/Changing Speeds . . . . . . . . . . . 23
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Scroll Compressor Rotation . . . . . . . . . . . . . . . . . . 25
Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Flow Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . 32
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . 32
Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Fan Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . 33
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . 33
Checking System Charge . . . . . . . . . . . . . . . . . . . . . 34
Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . 34
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 35
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Control Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Thermostatic Expansion Valves . . . . . . . . . . . . . . . .35
Disposal of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
50PCH START-UP CHECKLIST . . . . . . . . . . . . . .. CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the litera-
ture, tags and labels attached to the unit, and other safety precau-
tions that may apply.
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause explosion, fire, electrical shock or other
conditions which may cause personal injury or property damage.
Consult a qualified installer, service agency, or your distributor or
branch for information or assistance. The qualified installer or
agency must use factory-authorized kits or accessories when mod-
ifying this product. Refer to the individual instructions packaged
with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all warn-
ings or cautions attached to the unit. Consult local building codes
and the National Electrical Code (NEC, U.S.A.) for special instal-
lation requirements.
Understand the signal words — DANGER, WARNING, and
CAUTION. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING signifies
hazards that could result in personal injury or death. CAUTION is
used to identify unsafe practices, which would result in minor per-
sonal injury or product and property damage.
Recognize safety information. This is the safety-alert symbol
( ). When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
IMPORTANT: Read the entire instruction manual before
starting installation.
WARNING
Electrical shock can cause personal injury or death. Before
installing or servicing system, always turn off main power to
system. There may be more than one disconnect switch. Turn
off accessory heater power if applicable.
Aquazone™
50PCH 009-070
Compact Water Source Heat Pumps
with Puron®Refrigerant (R-410A) 50 Hz

2
GENERAL
This Installation and Start-Up Instructions literature is for
Aquazone™ 50PC compact water source heat pump systems.
Water source heat pumps (WSHPs) are single-package horizontal-
ly and vertically mounted units with electronic controls designed
for year-round cooling and heating.
GREENHOUSE GAS REGULATION
F-Gas Regulation (517/2014)
This device utilizes a fluorinated greenhouse gas (F-gas), which is
regulated under the EU F-Gas Regulation (517/2014). The her-
metically sealed refrigerant circuit is factory charged with HFC-
410A refrigerant. Refrigerant charge amounts by unit size, global
warming potential (GWP), and equivalent CO2 tonnage (t) can be
found in Table 1 and on the unit label. The installer, building oper-
ator, and service provider must conform to usage, handling, and
record-keeping requirements as stated in the regulation.
PRE-INSTALLATION
Inspection
Upon receipt of shipment, carefully check the shipment against
the bill of lading. Make sure all units have been received. Inspect
the carton or crating of each unit, and inspect each unit for damage
on both the interior and exterior. 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 re-
ported to the shipping company within 5 days of receipt of ship-
ment.
NOTE: It is the responsibility of the purchaser to file all necessary
claims with the shipping company.
Storage
If the equipment is not needed for immediate installation upon its
arrival at the job site, it should be left in its shipping carton and
stored in a clean, dry area between 10°C and 35°C. Units must
only be stored or moved in the normal upright position as indicat-
ed by the UP arrows on each carton at all times. If unit stacking is
re- quired, stack units as follows: vertical units less than 6 tons, no
more than two high; horizontal units less than 6 tons, no more than
three high. Do not stack units larger than 6 tons.
INSTALLATION
Step 1 — Check Jobsite
Installation, operation and maintenance instructions are provided
with each unit. Before unit start-up, read all manuals and become
familiar with the unit and its operation. Thoroughly check out the
system before operation. Complete the inspections and instruc-
tions listed below to prepare a unit for installation. See Tables 2
and 3 for unit physical data.
The WSHP units are designed for indoor installation only. Be
sure to allow adequate space around the unit for servicing. See
Fig. 1 for overall unit dimensions. See Table 4 for corner weights
information.
Installation Guidelines (All Units)
1. Be sure that the location chosen for unit installation provides
ambient temperatures maintained above freezing.
2. Be sure the installation location is isolated from sleeping
areas, private offices and other acoustically sensitive spaces.
WARNING
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and goggles
and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from system
using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen and
the work area should be well ventilated. Refrigerant in
contact with an open flame produces toxic gases.
d. Cut component connection tubing with tubing cutter and
remove component from unit. Use a pan to catch any oil
that may come out of the lines and as a gage for how
much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when neces-
sary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal
injury and death.
CAUTION
DO NOT re-use compressor oil or any oil that has been
exposed to the atmosphere. Dispose of oil per local codes and
regulations. DO NOT leave refrigerant system open to air any
longer than the actual time required to service the equipment.
Seal circuits being serviced and charge with dry nitrogen to
prevent oil contamination when timely repairs cannot be
completed. Failure to follow these procedures may result in
damage to the equipment.
IMPORTANT: The installation of water source heat pump
units and all associated components, parts, and accessories
which make up the installation shall be in accordance with the
regulations of ALL authorities having jurisdiction and MUST
conform to all applicable codes. It is the responsibility of the
installing contractor to determine and comply with ALL
applicable codes and regulations.
Table 1 — Refrigerant Charge and CO2Equivalent
GLOBAL
WARMING
POTENTIAL
(GWP)
[kgCO2eq]
Model Refrigerant
Charge (kg)
CO2 equivalent
tonnage (t)
of refrigerant
charge
2088
50PCH009 0.454 0.947
50PCH012 0.539 1.125
50PCH015 0.539 1.125
50PCH018 0.624 1.302
50PCH024 0.992 2.072
50PCH030 0.992 2.072
50PCH036 1.134 2.368
50PCH042 1.219 2.545
50PCH048 1.446 3.019
50PCH060 1.758 3.670
50PCH070 1.729 3.611
If the refrigerant charge is adjusted from the factory charge
levels, it must be noted on the unit label and in related
documentation as required by EU Regulation (517/2014).

3
3. Be sure unit is mounted at a height sufficient to provide an
adequate slope of the condensate lines. If an appropriate slope
cannot be achieved, a field-supplied condensate pump may
be required.
4. On horizontal units, allow adequate room below the unit for
condensate drain trap and do not locate the unit above supply
piping.
5. Provide sufficient space for duct connection. Do not allow 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.
7. Provide sufficient access to allow maintenance and servicing
of the blow and blower motor, compressor and coils.
Removal of the entire unit from the closet should not be nec-
essary.
8. Provide an unobstructed path to the unit within the closet or
mechanical room. Space should be sufficient to allow return
air to freely enter the space.
9. Provide ready access to water valves and fittings, and screw-
driver access to unit side panels, discharge collar, and all elec-
trical connections.
10. Where access to side panels is limited, pre-removal of the
control box side mounting screws may be necessary for
future servicing.
Step 2 — Check Unit
Upon receipt of equipment at the jobsite, inspect the carton or
crating of each unit, and inspect each unit for damage on both the
interior and exterior. Note any damage and contact your local
equipment sales office.
INSPECT UNIT
To prepare the unit for installation, complete the procedures listed
below:
1. Verify that the correct unit has been received. Check the unit
capacity (tonnage), voltage, orientation, and configuration.
2. Compare the electrical data on the unit nameplate with to ver-
ify the jobsite power feed (voltage, amperage, MCA) and
power protection (MOCP).
3. Verify that the unit is the correct model for the entering water
temperature of the job (standard or extended range)
4. Remove the unit packaging, keeping the unit attached to the
shipping pallet. Do not destroy packaging. Save for re-instal-
lation on the unit if the unit will not be fully installed.
5. Open a unit access panel. Verify that the refrigerant tubing is
free of kinks or dents, and that it does not touch other unit
components.
6. Check the water piping and piping connections to make sure
they are free from defects, kinks, dents, and appear to be
water tight. Verify system operating water pressure.
7. Inspect the blower assembly. Verify that the blower has not
come lose during shipping. Verify clearance between the
blower wheel and the blower housing. Verify free blower
rotation.
8. Inspect all electrical connections. Be sure connections are
clean and tight at the terminals.
9. Check unit controls. If Better B, Complete C, or Deluxe D,
verify field provided thermostat is available. If WSHP Open,
verify proper sensor has been provided and a commissioning
interface will be available.
10. 50PCH Only - Locate the hanging bracket kit located in the
compressor compartment.
11. Remove the foam blower shipping support from underneath
the blower section.
12. Remove any shipping brackets from the unit.
CAUTION
To avoid equipment damage, do not use these units as a
source of heating or cooling during the construction pro-
cess. The mechanical components and filters used in these
units quickly become clogged with construction dirt and
debris which may cause system damage.
CAUTION
DO NOT store or install units in corrosive environments or in
locations subject to temperature or humidity extremes (e.g.,
attics, garages, rooftops, etc.). Corrosive conditions and high
temperature or humidity can significantly reduce performance,
reliability, and service life. Always move units in an upright
position. Tilting units on their sides may cause equipment
damage.

4
Table 2 — Physical Data — 50PCH (009-070) Units ETL Rated
LEGEND
50PCH UNIT 009 012 015 018 024 030
COMPRESSOR (1 each) Rotary Rotary Rotary Rotary Scroll Scroll
Maximum Water Working Pressure (kPa) 2758 2758 2758 2758 2758 2758
FAN MOTOR AND BLOWER
Fan Motor Type/Speeds PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 PSC/3
Fan Motor (W) 75 75 124 186 186 186
Blower Wheel Size (Dia x W) (mm) 114.3 x 114.3 139.7 x 114.3 228.6 x 177.8 228.6 x 177.8 228.6 x 177.8 228.6 x 177.8
WATER CONNECTION SIZE
FPT (mm) 19.05 19.05 19.05 19.05 19.05 19.05
Coaxial Coil Volume (L) 0.30 0.30 0.34 0.54 0.91 0.91
HORIZONTAL CABINET
Refrigeration Charge (kg) 0.54 0.54 0.54 0.62 0.99 0.99
Air Coil Dimensions (cm) (H x W) 254 x 356 254 x 356 305 x 419 406 x 419 406 x 521 406.4 x 521
Standard Filter - 1 in. Throwaway (cm)
(L x H) 254 x 406 x 25.4 254 x 406 x 25.4 406 x 508 x 25.4 406 x 508 x 25.4 406 x 635 x 25.4 406 x 635 x 25.4
Weight - Operating (kg) 48 48 62 79 82 86
Weight - Shipping (kg) 61 61 72 94 96 102
50PCH UNIT 036 042 048 060 070
COMPRESSOR (1 each) Scroll Scroll Scroll Scroll Scroll
Maximum Water Working Pressure (kPa) 2758 2758 2758 2758 2758
FAN MOTOR AND BLOWER
Fan Motor Type/Speeds PSC/3 PSC/3 PSC/3 PSC/3 PSC/3
Fan Motor (W) 373 373 559 559 559
Blower Wheel Size (Dia x W) (mm) 228.6 x 177.8 254 x 203.2 254 x 203.2 254 x 228.6 279.4 x 228.6
WATER CONNECTION SIZE
FPT (mm) 19.05 19.05 25.4 25.4 25.4
Coaxial Coil Volume (L) 1.04 1.04 1.85 2.33 2.33
HORIZONTAL CABINET
Refrigeration Charge (kg) 1.13 1.22 1.45 1.76 1.73
Air Coil Dimensions (cm) (H x W) 457 x 699 457 x 699 508 x 813 508 x 813 508 x 1067
Standard Filter - 1 in. Throwaway (cm)
(L x H) 457.2 x 762 x 25.4 457 x 762 x 25.4 508 x 876 x 25.4 508 x 876 x 25.4 508 x 610 x 25.4 (2)
Weight - Operating (kg) 103 105 124 131 143
Weight - Shipping (kg) 123 120 136 144 166
FPT —Female Pipe Thread
PSC —Permanent Split Capacitor

5
Table 3 — Physical Data — 50PCH (009-070) Units CE Rated
LEGEND
50PCH UNIT 009 012 015 018 024 030
COMPRESSOR (1 each) Rotary Rotary Rotary Rotary Scroll Scroll
Maximum Water Working Pressure (kPa) 2758 2758 2758 2758 2758 2758
PSC FAN MOTOR AND BLOWER
Fan Motor Type/Speeds PSC/3 PSC/3 ECM ECM ECM ECM
Fan Motor (W) 75 75 249 249 249 249
Blower Wheel Size (Dia x W) (mm) 114.3 x 114.3 139.7 x 114.3 228.6 x 177.8 228.6 x 177.8 228.6 x 177.8 228.6 x 177.8
WATER CONNECTION SIZE
FPT (mm) 19.05 19.05 19.05 19.05 19.05 19.05
Coaxial Coil Volume (L) 0.30 0.30 0.34 0.54 0.91 0.91
HORIZONTAL CABINET
Refrigeration Charge (kg) 0.54 0.54 0.54 0.62 0.99 0.99
Air Coil Dimensions (H x W) 254 x 356 254 x 356 305 x 419 406 x 419 406 x 521 406.4 x 521
Standard Filter - 1 in. Throwaway
(L x H) 254 x 406 x 25.4 254 x 406 x 25.4 406 x 508 x 25.4 406 x 508 x 25.4 406 x 635 x 25.4 406 x 635 x 25.4
Weight - Operating (kg) 48 48 62 79 82 86
Weight - Shipping (kg) 61 61 72 94 96 102
50PCH UNIT 036 042 048 060 070
COMPRESSOR (1 each) Scroll Scroll Scroll Scroll Scroll
Maximum Water Working Pressure (kPa) 2758 2758 2758 2758 2758
PSC FAN MOTOR AND BLOWER
Fan Motor Type/Speeds ECM ECM ECM ECM ECM
Fan Motor (W) 373 559 559 746 746
Blower Wheel Size (Dia x W) (mm) 228.6 x 177.8 254 x 203.2 254 x 203.2 254 x 228.6 279.4 x 228.6
WATER CONNECTION SIZE
FPT (mm) 19.05 19.05 25.4 25.4 25.4
Coaxial Coil Volume (L) 1.04 1.04 1.85 2.33 2.33
HORIZONTAL CABINET
Refrigeration Charge (kg) 1.13 1.22 1.45 1.76 1.73
Air Coil Dimensions (H x W) 457 x 699 457 x 699 508 x 813 508 x 813 508 x 1067
Standard Filter - 1 in. Throwaway
(L x H) 457.2 x 762 x 25.4 457 x 762 x 25.4 508 x 876 x 25.4 508 x 876 x 25.4 508 x 610 x 25.4 (2)
Weight - Operating (kg) 103 105 124 131 143
Weight - Shipping (kg) 123 120 136 144 166
ECM —Electronically Commutated Motor
FPT —Female Pipe Thread
PSC —Permanent Split Capacitor

6
Fig. 1 — 50PCH009-070 Unit Dimensions
Electrical
Knock-Outs
Compressor
Access
D
Return Air
Opening
Return Air
Opening
Condensate
Drain
E
RF
T
H
G
A
N
Q
B
C
N
A
M
K
J
B
C
P
K
Condensate
Drain
Left Hand Return End Blow Left Hand Return
NOTE: Models 048 and 060 Left Hand Return units have condenser Straight Through
water connections on the front right and electrical knockouts on the front left.
AIR COIL
Blower
Blower Access
457.2 mm Minimum
609.6 mm Optimum
Compressor Access and
Control Access
Compressor
Electrical
Control
Box
Right Hand Return End Blow Right Hand Return
Straight Through
Service Clearances
Return Air
Opening
Condensate
Drain
Return Air
Opening
FR
T
D
EQ
NK
J
A
B
C
N
B
M
K
P
A
C
Condenser
Water In
Condenser
Water Out
Condensate
Drain
457.2 mm Minimum
914.4 mm Optimum
NOTES:
1. All dimensions are metric (mm) unless stated otherwise.
2. All condensate drain connections are 3/4 in. FPT.
3. Specifications subject to change without notice.
4. The 25.4 mm filter rack extends 31.24 mm beyond the side of the unit. The
50.8 mm filter rack extends 73.4 mm beyond the side of the unit. The 50.8 mm
filter rack is 4-sided with a filter access door on one end and can accept either a
25.4 mm or 50.8 mm filter.
50PCH
UNIT
SIZE
A B C D E F G H J K M N P Q R T
CONDENSER
WATER
CONNECTIONS
FPT (in.)
RECOMMENDED
REPLACEMENT NOM-
INAL FILTER SIZE
WIDTH DEPTH HEIGHT
CAB
END TO
FILTER
RACK
R/A
DUCT
WIDTH
CAB
FRONT
TO
FILTER
RACK
WATER
INLET
WATER
OUTLET
SIDE
TO
DISC.
(END)
DISC.
WIDTH
TOP
TO
DISC.
(FLE &
FRS)
DISC.
HEIGHT
END
TO
DISC.
TOP
TO
DISC.
(FRE &
FLS)
FILTER
RACK
HEIGHT
R/A
DUCT
FLANGE
HEIGHT
009 482.6 838.2 292.1 38.1 410.21 389.89 60.45 241.30 136.53 160.02 151.64 104.14 123.83 35.81 287.0 218.4 3/4” FPT 254 x 406.4 x 25.4
012 482.6 838.2 292.1 38.1 410.21 389.89 60.45 241.30 133.35 163.32 160.27 104.14 120.65 28.96 287.0 218.4 3/4” FPT 254 x 406.4 x 25.4
015 558.8 1092.2 431.8 38.1 511.81 542.29 72.64 381.00 207.01 163.32 242.57 104.14 194.31 86.36 426.7 381.0 3/4” FPT 406.4 x 508 x 25.4
018 558.8 1092.2 431.8 38.1 511.81 542.29 72.64 358.90 137.67 231.90 155.19 245.11 124.97 31.24 426.7 381.0 3/4” FPT 406.4 x 508 x 25.4
024 558.8 1092.2 457.2 38.1 635.00 419.10 72.64 358.90 137.67 231.90 155.19 245.11 124.97 31.24 426.7 381.0 3/4” FPT 406.4 x 635 x 25.4
030 558.8 1092.2 457.2 38.1 635.00 419.10 62.74 381.00 137.67 231.90 155.19 245.11 124.97 31.24 426.7 381.0 3/4” FPT 406.4 x 635 x 25.4
036 558.8 1384.3 482.6 38.1 765.81 580.39 72.64 409.70 164.34 231.90 190.50 261.11 151.64 30.73 477.5 431.8 3/4” FPT 457.2 x 762 x 25.4
042 558.8 1384.3 482.6 38.1 765.81 580.39 72.64 409.70 133.86 265.43 164.08 287.02 121.16 30.99 477.5 431.8 3/4” FPT 457.2 x 762 x 25.4
048 635.0 1384.3 533.4 38.1 878.84 467.36 72.64 470.41 184.15 265.43 189.48 288.54 171.45 54.86 528.3 482.6 1” FPT 508 x 876.3 x 25.4
060 635.0 1384.3 533.4 38.1 878.84 467.36 72.64 470.41 160.53 298.70 172.97 317.50 147.83 42.67 528.3 482.6 1” FPT 508 x 876.3 x 25.4
070 635.0 1651.0 533.4 38.1 1221.74 391.16 72.64 470.41 160.53 298.70 172.97 317.50 147.83 42.67 528.3 482.6 1” FPT 508 x 609.6 x 25.4 (2)
LEGEND
R/A —Return Air

7
Table 4 — 50PCH009-070 Corner Weights (kg)
* Front is counter box end.
Step 3 — Locate Unit
Locate the unit in an indoor area that allows easy removal of the
filter and access panels, and has enough room for service person-
nel to perform maintenance or repair. Provide sufficient room to
make fluid, electrical, and duct connection(s). If the unit is located
in a confined space such as a closet, provisions must be made for
return air to freely enter the space.
Unit condensate drains are not internally trapped. Allow room be-
low the unit base for horizontal and counterflow models for an ad-
equate condensate trap.
These units are not approved for outdoor installation; therefore,
they must be installed inside the structure being conditioned. Do
not locate units in areas that are subject to freezing. Units must be
installed in conditioned space that is not subject to extremes of
temperature or humidity to avoid cabinet sweating and/or equip-
ment damage.
Do not use units for temporary heating, air conditioning or ventila-
tion during construction, especially when plastering, sanding or
painting. Care should be taken to avoid introduction of dust, paint
or debris into the air coil.
PROTECTION
Once the units are properly positioned on the jobsite, cover them
with either a shipping carton, vinyl film, or an equivalent protec-
tive covering. Cap open ends of pipes stored on the jobsite. This
precaution is especially important in areas where painting, plaster-
ing, or spraying of fireproof material, etc. is not yet complete. For-
eign material that accumulates within the units can prevent proper
start-up and require costly clean-up operations. Before installing
any of the system components, be sure to examine each pipe, fit-
ting, and valve, and remove any dirt or foreign material found in
or on these components.
Step 4 — Mount the Unit
DUCT FLANGES
The 50PC heat pumps feature fold-out return and supply air duct
flanges. These fold-out flanges allow the heat pumps to more easi-
ly fit through doorways and other tight spaces, and also prevent
damage in shipping and handling.
It is recommended that all fold-out flanges be folded out once the
heat pump is installed to ensure that return and supply airflow is
not obstructed. These flanges can be easily folded using standard
or duckbill pliers. Once folded out these flanges can be used to
support light ductwork loads.
To reduce sound transmission, units should be installed using flex-
ible electrical conduit and hose kits. Care should be taken to
ensure that no part of the unit cabinet is touching part of the build-
ing structure. For ducted return applications, a flexible duct con-
nection should be used.
HORIZONTAL UNITS
While horizontal units may be installed on any level surface strong
enough to hold their weight, they are typically suspended above a
ceiling by threaded rods. The rods are usually attached to the unit
corners by hanging bracket kits. See Fig. 2. The rods must be se-
curely anchored to the ceiling.
Fig. 2 — Hanger Bracket
Horizontal units installed above the ceiling must conform to all lo-
cal codes. An auxiliary drain pan if required by code, should be at
least 102 mm larger than the bottom of the heat pump.
Plumbing connected to the heat pump must not come in direct
contact with joists, trusses, walls, etc. Some applications require
an attic floor installation of the horizontal unit. In this case the unit
should be set in a full size secondary drain pan on top of a vibra-
tion absorbing mesh.
The secondary drain pan prevents possible condensate overflow or
water leakage damage to the ceiling. The secondary drain pan is
usually placed on a plywood base isolated from the ceiling joists
by additional layers of vibration absorbing mesh. In both cases, a
19 mm drain connected to this secondary pan should be run to an
eave at a location that will be noticeable.
UNIT
SIZE TOTAL (kg)
LEFT HAND EVAPORATOR RIGHT HAND EVAPORATOR
LEFT FRONT* RIGHT FRONT* LEFT BACK RIGHT BACK LEFT FRONT* RIGHT FRONT* LEFT BACK RIGHT BACK
009 47 13 11 12 12 11 13 12 12
012 48 13 11 12 12 11 13 12 12
015 58 16 13 15 13 13 16 13 15
018 80 26 16 22 17 16 26 17 22
024 82 26 17 22 17 17 26 17 22
030 88 28 18 23 19 18 28 19 23
036 108 32 22 30 24 22 32 24 30
042 105 32 21 29 23 21 32 23 29
048 122 39 27 28 27 27 39 27 28
060 131 40 29 31 30 29 40 30 31
070 143 44 32 35 32 32 44 32 35

8
Hanging Bracket Assembly
All horizontal units come with a hanging bracket kit to facilitate
suspended unit mounting using threaded rod. Hanging brackets
are to be installed as shown in Fig. 3.
Fig. 3 — Hanging Bracket Locations
This kit includes the following:
(5) Brackets
(5) Rubber vibration isolators
(8) Screws #10 x 1/2 in.
(10) Bolts 1/4 - 28 x 1/2 in. hex bolt (not used on this model)
The following are needed and are to be field provided:
• Threaded rod (3/8 in. max dia)
• Hex Nuts
• Washers (13/4 in. min OD)
1. Remove and discard factory-provided screws from location
where hanging brackets will be installed as shown in Fig. 4.
Fig. 4 — Remove Factory-Provided Screws
2. Mount four brackets to unit corner post using the bolts pro-
vided in the kit as shown in Fig. 5.
Fig. 5 — Bracket Mounting
3. Install rubber grommet on the bracket as shown in Fig. 6.
4. Hang the unit and assemble the field provided thread rod,
nuts and washers on to the brackets as shown in Fig. 6.
Fig. 6 — Unit Hanging
To reduce sound transmission, units should be installed using flex-
ible electrical conduit and hose kits. Care should be taken to en-
sure that no part of the unit cabinet is touching part of the building
structure. For ducted return applications, a flexible duct connec-
tion should be used.
Step 5 — Check Duct System
All units are provided with a return air duct flange and supply air
duct connections. Refer to unit dimensional drawings (Fig. 1) for
physical dimensions of the collar and flange.
A flexible connector is recommended for supply and return air
duct connections on metal duct systems. All metal ducting should
be insulated with a minimum of 25 mm duct insulation to avoid
heat loss or gain and prevent condensate from forming during the
cooling operation. Application of the unit to uninsulated ductwork
is not recommended as the unit’s performance will be adversely
affected.
If the unit will be installed in a new installation with new
ductwork, the installation should be designed using current
ASHRAE (American Society of Heating, Refrigerating, and Air-
Conditioning Engineers) procedures for duct sizing. If the unit will
be connected to an existing duct system, a check should be made
to assure that the duct system has the capacity to handle the air
required for the unit application. If the duct system is too small,
CAUTION
If the unit is located in a crawl space, the bottom of the unit
must be at least 101.6 mm above grade to prevent flooding of
the electrical parts due to heavy rains.
WARNING
To avoid possible injury or death due to faulty installation do
not reuse screws removed from the unit on Step 1 to mount the
hanging brackets to the unit.
Hanging Brackets Locations
WARNING
To avoid possible injury or death due to faulty installation fol-
low all applicable code requirements when hanging this unit.
WARNING
To avoid possible injury or death due to faulty installation rods
must be securely anchored to the ceiling.

9
larger ductwork must be installed. Be certain to check for and
repair existing leaks and repair. The duct system and all diffusers
should be sized to handle the designed airflow quietly. To
maximize sound attenuation of the unit blower, the supply and
return air plenums should be insulated. There should be no direct
straight air path through the air grille into the heat pump. The
return air inlet to the heat pump must have at least one 90-degree
turn away from the space return air grille. If air noise or excessive
airflow are a problem, the blower speed can be changed to a lower
speed to reduce airflow.
HORIZONTAL SUPPLY AIR CONFIGURATION
CONVERSION
The supply air location on horizontal units can be quickly field
converted from end blow to straight through or vice-versa. To con-
vert the supply air direction, follow the steps below:
1. If connected to power, shut off the unit and disconnect switch
or circuit breaker.
2. Unscrew and remove the blower access panel.
3. Disconnect the wires from the unit electrical box to the
blower motor. Note which speed taps are wired for units.
4. Unscrew and carefully remove the blower panel with the
blower and motor attached. Be careful not to damage the
refrigerant coils or any other internal unit components.
5. Remove the blower support brackets from the bottom of the
blower housing and relocate them to the top of the blower
housing.
6. Turn the blower panel 180 degrees so that the blower support
brackets are now at the bottom of the blower.
7. Insert the blower panel with the blower and motor into the
desired location. Be careful not to damage the refrigerant
coils or any other internal unit components. Screw the panel
into place.
8. Replace the wires between the blower motor and electrical
box. Make sure to connect wires to the proper speed taps.
9. Replace the blower access panel.
10. Reconnect power to the unit.
Step 6 — Install Condensate Drain
A drain line must be connected to the heat pump and pitched away
from the unit a minimum of 2 cm/m to allow the condensate to
flow away from the unit.
This connection must be in conformance with local plumbing
codes. A trap must be installed in the condensate line to ensure
free condensate flow. (Heat pumps are not internally trapped.) A
vertical air vent is sometimes required to avoid air pockets. See
Fig. 7.
Fig. 7 — Condensate Drain
The depth of the trap depends on the amount of positive or nega-
tive pressure on the drain pan. A second trap must not be included.
The horizontal unit should be pitched approximately 6 mm to-
wards the drain in both directions, to facilitate condensate remov-
al. (See Fig. 8.)
Fig. 8 — Pitched Unit
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 additional information.
All WSHP units use low temperature soldered female pipe thread
fittings for water connections to prevent annealing and out-of-
round leak problems which are typically associated with high
temperature brazed connections. Refer to Tables 2 and 3 for
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 condensa-
tion in the case where fluid in loop piping operates at tem-
peratures 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.
PIPING
Supply and return piping must be as large as the unit connections
on the heat pump (larger on long runs). Never use flexible hoses of
a smaller inside diameter than that of the water connections on the
unit. The 50PC units are supplied with either a copper or optional
cupro-nickel condenser. Copper is adequate for ground water that
is not high in mineral content. Refer to water quality guidelines.
In conditions anticipating moderate scale formation or in brackish
water a cupro-nickel heat exchanger is recommended. Both the
supply and discharge water lines will sweat if subjected to low wa-
ter temperature. These lines should be insulated to prevent damage
from condensation.
All manual flow valves used in the system must be ball valves.
Globe and gate valves must not be used due to high pressure drop
and poor throttling characteristics. Always check carefully for wa-
ter leaks and repair appropriately. Units are equipped with female
pipe thread fittings. Consult the specification sheets for sizes.
Teflon1 tape sealer should be used when connecting water piping
connections to the units to ensure against leaks and possible heat
exchanger fouling. Do not overtighten the connections. Flexible
hoses should be used between the unit and the rigid system to
avoid possible vibration. Ball valves should be installed in the
TRAP DOWN
50.8 mm MIN.
SLOPE DOWN
MIN. 2 cm/m
CONDENSATE DRAIN
CONNECTION
VENT (OPTIONAL)
1. Teflon is a registered trademarks of DuPont.
ELEVATION LINE
WHEN MOUNTED LEVEL
6.35 mm

10
supply and return lines for unit isolation and unit water flow
balancing.
Pressure/temperature ports are recommended in both the supply
and return lines for system flow balancing. The water flow can
be accurately set by measuring the water-to-refrigerant heat ex-
changers water side pressure drop. See the unit specification
sheets for the water flow and pressure drop information.
WATER LOOP APPLICATIONS
Water loop applications usually include a number of units
plumbed to a common piping system. Maintenance to any of
these units can introduce air into the piping system. Therefore,
air elimination equipment comprises a major portion of the me-
chanical room plumbing.
For proper maintenance and servicing, pressure-temperature (P/
T) ports are necessary for temperature and flow verification.
In addition to complying with any applicable codes, consider
the following for system piping:
• Piping systems using water temperatures below 10°C re-
quire 12.7 mm closed cell insulation on all piping sur-
faces to eliminate condensation.
• Avoid all plastic to metal threaded fittings due to the po-
tential 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.
To assure adequate cooling and heating performance, the cool-
ing tower and boiler water loop temperature should be main-
tained between 10°C and 23.9°C in the heating mode and
15.6°C and 43.3°C in the cooling mode. In the cooling mode,
heat is rejected from the unit into the water loop. A cooling tow-
er provides evaporative cooling to the loop fluid, thus maintain-
ing a constant supply temperature to the unit. When utilizing an
open cooling tower, chemical water treatment is mandatory to
ensure the water is free of corrosive materials.
A secondary heat exchanger (plate frame between the unit and
the open cooling tower) may also be used. In the heating mode,
heat is absorbed from the water loop to the unit. A boiler can be
utilized to maintain the loop within the proper temperature
range.
No unit should be connected to the supply or return piping until
the water system has been completely cleaned and flushed to re-
move dirt, piping chips or other foreign material. Supply and
return hoses should be connected together during this process to
ensure the entire system is properly flushed. After the cleaning
and flushing has taken place the unit may be connected to the
water loop and should have all valves wide open. See Fig. 9.
NOTE: It is imperative that all air is eliminated from the closed
loop side of the heat exchanger to prevent condenser fouling.
GROUND-LOOP APPLICATIONS
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.
• Do not use galvanized or steel fittings at any time due to
corrosion.
• Avoid all plastic to metal threaded fittings due to the po-
tential 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.
GEOTHERMAL CLOSED LOOP SYSTEMS
Operation of a 50PC Series unit on a closed loop application re-
quires the extended range option.
NOTE: Closed loop and pond applications require specialized
design knowledge. No attempt at these installations should be
made unless the dealer has received specialized training.
Utilizing Ground Loop Pumping Package (GLP) makes the in-
stallation easy. Anti-freeze solutions must be utilized when low
loop temperatures are expected to occur. Refer to the installa-
tion manuals for more specific instructions. See Fig. 10.
OPEN WELL WATER SYSTEMS
When a water well is used exclusively for supplying water to
the heat pump, the pump should operate only when the heat
pump operates. A 24-volt, double pole single throw (DP/ST)
contactor can be used to operate the well pump with the heat
pump. When two or more units are supplied from one well, the
pump can be wired to operate independently from either unit.
Two 24-volt double pole single throw relays wired in parallel
are required.
The discharge water from the heat pump is not contaminated in
any manner and can be disposed of in various ways depending
on local codes (i.e., discharge well, dry well, storm sewer, drain
field, stream, pond, etc.). See Fig. 11.

11
Fig. 9 — Cooling/Boiler Application
Fig. 10 — Earth Coupled Application
9
2
1
3
4
8
5
7
6
COOLING TOWER/BOILER APPLICATION
LINE VOLTAGE DISCONNECT
LOW VOLTAGE CONTROL CONNECTION
P/T PLUGS (Optional)
HOSE KITS
BALL VALVES
SUPPLY AND RETURN LINES OF CENTRAL SYSTEM
FLEX DUCT CONNECTION
HANGING BRACKETS ASSEMBLY
THREADED ROD
1.
2.
3.
4.
5.
6.
7.
8.
9.

12
Fig. 11 — Well Water Applications
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 per-
mit 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 connec-
tion points. Hoses may vary in length by +2% to –4% under
pressure.
5. Refer to Table 5. Do not exceed the minimum bend radius for
the hose selected. Exceeding the minimum bend radius 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.
NOTE: Piping must comply with all applicable codes.
Table 5 — Metal Hose Minimum Bend Radii
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 expected
dew point of the pipe ambient. Insulation is required if loop water
temperature drops below the dew point.
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 com-
patible with Teflon tape or pipe joint compound employed.
Maximum allowable torque for brass fittings is 40.1 Nm. If a
torque wrench is not available, tighten finger-tight plus one quar-
ter turn. Tighten steel fittings as necessary.
Optional pressure-rated hose assemblies designed specifically 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 kinking during
installation.
HOSE DIAMETER (mm) MINIMUM BEND RADII (mm)
12.7 63.5
19.1 101.6
25.4 139.7
IMPORTANT: Do not bend or kink supply lines or hoses.
CAUTION
Backup wrench is required when tightening water connections
to prevent water line damage. Failure to use a backup wrench
could result in equipment damage.

13
Male adapters secure hose assemblies to the unit and risers. Install
hose assemblies properly and check them regularly to avoid sys-
tem failure and reduced service life. See Fig. 12.
Fig. 12 — Supply/Return Hose Kit
Step 8 — Wire Field Power Supply
See Fig. 14-17 for typical wiring diagrams. See Tables 6-10 for
additional electrical data.
HIGH VOLTAGE
All field installed wiring must comply with the following regula-
tions and requirements:
• The responsible power supply company's local regulations
and requirements, including any corresponding special
rules
• National building regulations
• EN 60335 (Electrical appliances and similar utilities -
Safety)
- Part 1 (General demands)
- Part 2-40 (Special demands on electrical heat pumps, air
conditioners and air dehumidifiers)
• EN 12828 (Heating systems in buildings - Design and in-
stallation of water-based heating systems)
All field wiring should be installed by qualified and trained
personnel. Refer to the unit wiring diagram for field connection
requirements.
Power wiring to the heat pump should be enclosed in flexible
conduit to minimize the transmission of vibration from the unit
cabinet to the building. The power is connected to the line (L) side
of the compressor contactor and the ground lug in the unit
electrical box.
Step 9 — Wire Control Connections
All thermostat wiring is connected to a terminal block located in
the unit electrical box. Refer to the unit wiring diagram for
connection details.
All 50PC 50Hz units can be controlled using the included
thermostat inputs (R, O, Y1, C, G) for single stage heat pump
thermostat or field-installed DDC (Direct Digital Controls)
controls. Note that the reversing valve on the unit is energized
when the unit is in the cooling mode. See Fig. 13 for typical
thermostat connections.
Fig. 13 — Typical Thermostat Connections
The 50PC heat pump can be controlled by most commonly
available single stage heat pump thermostats. The reversing
valve on the 50PC Series unit is energized when the unit is in
the cooling mode. Thermostats should be located on an interior
wall away from supply ducts. Avoid locations subject to direct
sunlight or drafts, or external walls. Thermostat wiring should
be 1 mm. Refer to the installation instructions for the
thermostat for further details.
The VA capacity of the transformer should be considered when
connecting low voltage accessories to the heat pump such as ther-
mostats or solenoid valves.
Table 6 shows the VA draw of factory-mounted components in the
50PC heat pump. The total VA draw of the heat pump internal
components plus any attached accessories must be lower than the
VA capacity of the unit control transformer.
WARNING
To avoid possible injury or death due to electrical shock, open
the power supply disconnect switch and secure it in an open
position during installation.
CAUTION
All power connections must be properly torqued to avoid the
risk of overheating.
CAUTION
Operating the unit below the minimum voltage, above the
maximum voltage or with incorrect phasing can result in poor
system performance or damage to the heat pump.
Rib Crimped
Length
(609.6 mm Length Standard)
Swivel
Brass
Fitting
Brass
Fitting
MPT
WARNING
To avoid possible injury or death due to electrical shock, never
route control wiring through the same conduit as power sup-
ply wiring.
Never route control wiring through the same conduit as power
supply wiring. Electrical noise and transients from the power
wiring can cause communication issues or damage to the con-
trol wiring and connected control components.
CAUTION
Never route control wiring through the same conduit as power
supply wiring. Electrical noise and transients from the power
wiring can cause communication issues or damage to the con-
trol wiring and connected control components.
IMPORTANT: Exceptionally long runs of thermostat wire
should be avoided to prevent voltage drops in the control
circuit.
COYRG

14
Table 6 — Low Voltage VA Draw
Table 7 — C Board Factory Default Settings
Table 8 — C Board DIP Switch Default Position
WARNING
Exceeding the transformer capacity can result in low control
voltage, erratic unit operation or damage to the heat pump.
STANDARD CONSTRUCTION
Component VA
Blower Relay 6-7
Reversing Valve Solenoid 8-9
Compressor Contactor 6-8
Unit Protection Module (UPM) 2
Total VA draw 22-26
FACTORY DEFAULT SETTINGS
Temperature –3.3°C
Lockout 2
Reset Y
Alarm Pulse
Test No
DIP SWITCH DEFAULT POSITION
Lockout 4 2
Reset R Y
Alarm Cont Pulse
Test Yes No

15
Fig. 14 —PSC Motor, Single Phase/Single Stage, Sizes 009 to 036
UPM STATUS LED - BLINK CODES
۱HIGH PRESSURE FAULT ۲LOW PRESSURE FAULT ۳ CONDENSER FREEZE CONDITION ٤ CONDENSATE OVERFLOW FAULT ٥ BROWN OUT FAULT ٦ EVAPORATOR FREEZE CONDITION
BLK (HI) BLU (MED) RED (LOW)

16
NOTES: 1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING. 2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY. 3. UPM INCLUDES BUILT IN: 270-300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS 4. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION. 5. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT –3.3 C BY DEFAULT, IF –9.4 C OPERATION IS REQUIRED JUMPER R30 MUST BE CUT. IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS. 6. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED. 7. DEFAULT SETTINGS FOR UPM FROM FACTORY SHOWN. 8. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED. 9. TERMINAL BLOCK TB3 LOCATED INSIDE DISCONNECT SWITCH BOX. 10. CHECK FOR PROPER PHASE ROTATION ON UNITS WITH SCROLL COMPRESSORS. REVERSE ROTATION WILL DAMAGE THE COMPRESSOR AND VOID UNIT WARRANTY. 11. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT. 12. PUMP MOTOR IS WIRED BETWEEN LINE AND NEUTRAL FOR 380-460VAC UNITS. FOR 208/230VAC UNITS PUMP MOTOR IS WIRED BETWEEN LINES.
UPM
SEE NOTES 4 - 8
10 11
Fig. 15 —PSC Motor, Three Phase, Sizes 024 to 048, 070

17
THERMOSTAT
R C G O Y۱ Y۲ W۱ W۲ H C
CFM ADJUST
TO ECM MOTOR
A
B
C
D
NORM
(+) (-)
TEST YES
HGRH
NO
CFM
UPM STATUS LED - BLINK CODES
۱HIGH PRESSURE FAULT
۲LOW PRESSURE FAULT ۳ CONDENSER FREEZE CONDITION ٤ CONDENSATE OVERFLOW FAULT ٥ BROWN OUT FAULT ٦ EVAPORATOR FREEZE CONDITION
Fig. 16 —ECM Motor, Single Phase, Sizes 015 to 036

18
THERMOSTAT
R C G O Y۱ Y۲ W۱ W۲ H C
CFM ADJUST
TO ECM MOTOR
A
B
C
D
NORM
(+) (-)
TEST YES
HGRH
NO
CFM
UPM STATUS LED - BLINK CODES
۱HIGH PRESSURE FAULT ۲ LOW PRESSURE FAULT
۳ CONDENSER FREEZE CONDITION ٤ CONDENSATE OVERFLOW FAULT
٥ BROWN OUT FAULT ٦EVAPORATOR FREEZE CONDITION
Fig. 17 —ECM Motor, Three Phase, Sizes 030 to 070

19
Table 9 — 50PCH (015-070) Unit with ECM Motor Electrical Data
LEGEND
Table 10 — 50PCH (015-070) Unit with PSC Motor Electrical Data
LEGEND
Step 10 — Wire Field Controls
SAFETY DEVICES AND UNIT PROTECTION MODULE
(UPM)
Each unit is factory provided with a UPM that controls the com-
pressor operation and monitors the safety. See Fig. 18 and 19.
General
The 50PC Series heat pumps are designed to be controlled by a
standard 1 heat / 1 cool heat pump thermostat. The heat pump con-
trol circuit operates on 24 VAC control voltage regardless of the
unit supply voltage.
Fan operation is controlled by the “G” terminal on the heat pump
thermostat terminal block. When “G” is energized the unit fan mo-
tor will start operating.
Compressor operation is controlled by the “Y” terminal on the
heat pump thermostat terminal block. When “Y” is energized, a
signal to start the compressor is sent to the UPM. The UPM
checks a number of safety features before then starting the com-
pressor. If any of the safety features connected to the UPM is in a
fault condition, the UPM will not start the compressor and will
flash a fault code on the red status LED indicating the nature of the
fault.
Additionally the UPM will delay compressor operation randomly
on initial start-up (random start delay) and will prevent the com-
pressor from restarting with less than 5 minutes of off time (anti
short cycle delay). Once all faults are cleared and the time delays
are satisfied, the UPM will energize the compressor. The compres-
sor will operate as long as the thermostat calls for “Y” and there
are no faults. Refer to the troubleshooting chart for fault diagnos-
tics.
UNIT SIZE
RATED
VOLTAGE
V-Ph/Hz
COMPRESSOR FAN MOTOR
FLA
FAN MOTOR
HP
TOTAL UNIT
FLA
MIN CIRCUIT
AMP MOP CALC MAX FUSE/ HACR
QTY RLA LRA
015 220-240/1/50 1 5.48 24.50 2.80 0.33 8.28 9.7 15.1 15
018 220-240/1/50 1 5.90 24.00 2.80 0.33 8.70 10.2 16.1 15
024 220-240/1/50 1 9.00 52.00 2.80 0.33 11.80 14.1 23.1 20
380-420/3/50 1 3.50 27.00 2.80 0.33 6.30 7.2 10.7 15
030 220-240/1/50 1 10.90 60.00 2.80 0.33 13.70 16.4 27.3 25
380-420/3/50 1 5.10 28.00 2.80 0.33 7.90 9.2 14.3 15
036 220-240/1/50 1 13.50 67.00 4.30 0.50 17.80 21.2 34.7 30
380-420/3/50 1 5.40 38.00 4.30 0.50 9.70 11.1 16.5 15
042 380-420/3/50 1 5.60 36.00 4.30 0.50 9.90 11.3 16.9 15
048 380-420/3/50 1 6.10 43.00 6.80 0.75 12.90 14.6 21.4 20
060 380-420/3/50 1 7.80 51.50 6.80 0.75 14.60 16.6 24.4 20
070 380-420/3/50 1 8.50 67.10 6.80 0.75 15.30 17.4 25.9 25
FLA —Full Load Amps
HACR —Heating, Air-Conditioning and Refrigeration
LRA —Locked Rotor Amps
RLA —Rated Load Amps
UNIT SIZE RATED
VOLTAGE
COMPRESSOR FAN MOTOR
FLA
FAN MOTOR
HP
TOTAL UNIT
FLA
MIN CIRCUIT
AMP MOP CALC MAX FUSE/ HACR
QTY RLA LRA
009 220-240/1/50 1 2.77 18.80 0.85 0.10 3.62 4.3 7.1 15
012 220-240/1/50 1 4.35 21.00 0.85 0.10 5.20 6.3 10.6 15
015 220-240/1/50 1 5.48 24.50 0.90 0.17 6.38 7.8 13.2 15
018 220-240/1/50 1 5.90 24.00 1.60 0.25 7.50 9.0 14.9 15
024 220-240/1/50 1 9.00 52.00 1.60 0.25 10.60 12.9 21.9 20
380-420/3/50 1 3.50 27.00 0.90 0.25 4.40 5.3 8.8 15
030 220-240/1/50 1 10.90 60.00 1.60 0.25 12.50 15.2 26.1 25
380-420/3/50 1 5.10 28.00 0.90 0.25 6.00 7.3 12.4 15
036 220-240/1/50 1 13.50 67.00 3.30 0.50 16.80 20.2 33.7 30
380-420/3/50 1 5.40 38.00 1.80 0.50 7.20 8.6 14.0 15
042 380-420/3/50 1 5.60 36.00 1.80 0.50 7.40 8.8 14.4 15
048 380-420/3/50 1 6.10 43.00 2.80 0.75 8.90 10.4 16.5 20
060 380-420/3/50 1 7.80 51.50 2.80 0.75 10.60 12.6 20.4 20
070 380-420/3/50 1 8.50 67.10 2.80 0.75 11.30 13.4 21.9 20
FLA —Full Load Amps
HACR —Heating, Air-Conditioning and Refrigeration
LRA —Locked Rotor Amps
RLA —Rated Load Amps
WARNING
To avoid possible injury or death due to electrical shock, open
the power supply disconnect switch and secure it in an open
position during installation.

20
Fig. 18 — Sequence of Operation
CC
LOCKOUT CAN BE SET
TO 4 VIA DIP SWITCH
BLINK CODE ON STATUS LED
SOFT LOCKOUT
RECORD ALARM
START COUNTER (IF APPLICABLE)
CC OUTPUT = ON
NO
YES
FRZ >TEMP
LIMIT
Y1 = ON
TIME > 30
SEC
CON > 0
POWER / SWITCHES / SENSOR
STATUS CHECK
START
TIMER
NO
YES
NO
YES
NO
YES
T > ASC OR
RS SEC
YES
NO
NO
YES
START
ANTI SHORT CYCLE
INITIAL
POWER UP
YES
NO
START
RANDOM START UP
START
COUNTER
NEEDED?
YES
COUNT = 2
OR
COUNT = 4
BLINK CODE ON STATUS LED
DISPLAY OUTPUT = PULSE
ALR OUTPUT = ON/PULSE
NO
YES
HARD
LOCKOUT?
CC OUTPUT = OFF
V > 18VAC
NO
YES YES
NO
BLINK CODE
ON STATUS LED
NO
RESET ON
Y
CLEAR FAULTS
R = 24VAC
NO
YES NO
YES
NO
YES
HPC =
CLOSED
RESET ON R
CC OUTPUT
= ON
NO
YES
TIME >
120 SEC
START
TIMER
NO
YES
CNT = CNT+1
LPC =
CLOSED