International comfort products PH4E Series User manual

516 01 2502 02 09−14−10
PACKAGED HEAT PUMP UNITS
Installation Instructions
PH4E Series
400V−3Ph−50Hz
International Comfort Products, LLC
Lewisburg, TN. 37091
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 2...............................
INTRODUCTION 2..........................................
RECEIVING AND INSTALLATION 2...........................
Check Equipment 2........................................
Identify Unit 2............................................
Inspect Shipment 2.......................................
Provide Unit Support 2......................................
Roof Curb 2.............................................
Slab Mount 3............................................
Provide Clearances 3.......................................
Rig and Place Unit 3........................................
Inspection 3.............................................
Rigging/Lifting of Unit 7...................................
Select and Install Ductwork 7................................
Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge Units 8................................
Provide for Condensate Disposal 8...........................
Install Electrical Connections 9...............................
High−Voltage Connections 9...............................
Control Voltage Connections 10............................
Standard Connections 10..................................
Transformer Protection 10.................................
Special Procedures for 420−v Operations 10.................
Accessory Electric heaters Installation 10....................
Sequence of Operation 10.................................
PRE−START−UP 13.........................................
START−UP 13..............................................
Checking Cooling & Heating Control Operation 13............
Check for Refrigerant Leaks 13.............................
PAGE
Start−Up Adjustments 13..............................
Checking & Adjusting Refrigerant Charge 14...........
Indoor Airflow & Airflow Adjustments 15...............
Defrost Control 16.....................................
Quiet Shift 16......................................
Defrost 17.........................................
MAINTENANCE 17...................................
Air Filter 17...........................................
Indoor Blower and Motor 17............................
Outdoor Coil, Indoor Coil, & Condensate Drain Pan 18.....
Outdoor Fan 18.......................................
Electrical Controls and Wiring 18........................
Refrigerant Circuit 19..................................
Indoor Airflow 19......................................
Metering Devices−Piston 19
...........................
Pressure Switches 20..................................
Loss of Charge Switch 20..............................
High Pressure Switch 20...............................
Copeland Scroll compressor (R−410A Refrigerant) 20......
Refrigerant System 20.................................
Refrigerant 20.....................................
Compressor Oil 20.................................
Servicing Systems on Roofs with Synthetic Materials 20.
Liquid Line Filter Drier 20............................
R−410A Refrigerant Charging 20.....................
System Information 21.................................
Loss of Charge Switch 21...........................
Check Defrost Thermostat 21........................
TROUBLESHOOTING 23..............................
START−UP CHECKLIST 24............................

2513 01 3402 02
FIGURE 1 PH4E PACKAGED HEAT PUMP
SAFETY CONSIDERATIONS
Installation and servicing of this equipment can be hazardous
due to mechanical and electrical components. Only trained and
qualified personnel should install, repair, or service this
equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations
must be performed by trained service personnel. When working
on this equipment, observe precautions in the literature, on tags,
and on labels attached to or shipped with the unit and other
safety precautions that may apply.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes,
the current editions of the National Electrical Code (NEC) NFPA
70.
In Canada refer to the current editions of the Canadian Electrical
Code CSA C22.1.
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. Understand
these signal words: DANGER, WARNING, and CAUTION.
These words are used with the safety−alert symbol. DANGER
identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced installation,
reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, always turn off
main power to system and install lockout tag. There
may be more than one disconnect switch. Turn off
accessory heater power switch if applicable.
!WARNING
CUT HAZARD
Failure to follow this caution may result in personal
injury.
When removing access panels (see FIGURE 18) or
performing maintenance functions inside your unit, be
aware of sharp sheet metal parts and screws.
Although special care is taken to reduce sharp edges
to a minimum, be extremely careful when handling
parts or reaching into the unit.
!CAUTION
INTRODUCTION
The PH4E heat pump is fully self−contained and designed for
outdoor installation. (See FIGURE 1) Standard units are shipped
in a horizontal−discharge configuration for installation on a
ground level slab. Standard units can be converted to downflow
(vertical) discharge configurations for rooftop applications.
RECEIVING AND INSTALLATION
Step 1 — Check Equipment
Identify Unit
The unit model number and serial number are stamped on the
unit identification plate. Check this information against shipping
papers.
Inspect Shipment
Inspect for shipping damage before removing packaging
material. If unit appears to be damaged or is torn loose from its
anchorage, have it examined by transportation inspectors before
removal. Forward claim papers directly to transportation
company. Manufacturer is not responsible for any damage
incurred in transit. Check all items against shipping list.
Immediately notify the nearest equipment distributor if any item is
missing. To prevent loss or damage, leave all parts in original
packages until installation.
If the unit is to be mounted on a curb in a downflow application,
review Step 5 to determine which method is to be used to
remove the downflow panels before rigging and lifting into place.
The panel removal process may require the unit to be on the
ground.
Step 2 — Provide Unit Support
Roof Curb
Install accessory roof curb in accordance with instructions
shipped with curb (See FIGURE 5). Install insulation, cant strips,
roofing, and flashing. Ductwork must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is critical
for a watertight seal. Install gasketing material supplied with the
roof curb. Improperly applied gasketing also can result in air
leaks and poor unit performance.
Curb should be level to within 1/4 in. (6 mm) (See FIGURE 9).
This is necessary for unit drain to function properly. Refer to
accessory roof curb installation instructions for additional
information as required.
Accessory kits are available to aid in installing a new metal base
rail unit on a old roof curb.
Accessory kit number CPADCURB001A00, (small chassis) and
accessory kit number CPADDURB002A00, (large chassis)
includes roof curb adapter and gaskets for the perimeter seal
and duct openings. No additional modifications to curb are
required when using this kit.

3513 01 3402 02
UNIT STRUCTURAL DAMAGE HAZARD
Failure to follow this caution may result in property
damage
Ensure there is sufficient clearance for saw blade
when cutting the outer horizontal flange of the roof
curb so there is no damage to the roof or flashing.
CAUTION
!
Slab Mount
Place the unit on a solid, level concrete pad that is a minimum of
4 in. (102 mm) thick with 2 in. (51 mm) above grade (See
FIGURE 2). The slab should extend approximately 2 in. (51 mm)
beyond the casing on all 4 sides of the unit. Do not secure the
unit to the slab except when required by local codes.
FIGURE 2 Slab Mounting Detail
OPTIONAL
RETURN
AIR
OPENING
OPTIONAL
SUPPLY
AIR
OPENING
EVAP. COIL COND. COIL
2˝
(50.8mm)
Step 3 — Provide Clearances
The required minimum service clearances are shown in
FIGURE 3 and FIGURE 4. Adequate ventilation and outdoor air
must be provided. The outdoor fan draws air through the outdoor
coil and discharges it through the top fan grille. Be sure that the
fan discharge does not recirculate to the outdoor coil. Do not
locate the unit in either a corner or under an overhead
obstruction. The minimum clearance under a partial overhang
(such as a normal house overhang) is 48 in. (1219 mm) above
the unit top. The maximum horizontal extension of a partial
overhang must not exceed 48 in. (1219 mm).
IMPORTANT: Do not restrict outdoor airflow. An air restriction at
either the outdoor−air inlet or the fan discharge may be
detrimental to compressor life.
Do not place the unit where water, ice, or snow from an
overhang or roof will damage or flood the unit. Do not install the
unit on carpeting or other combustible materials. Slab−mounted
units should be at least 4 in. (102 mm) above the highest
expected water and runoff levels. Do not use unit if it has been
under water.
Step 4 — Rig and Place Unit
Rigging and handling of this equipment can be hazardous for
many reasons due to the installation location (roofs, elevated
structures, etc.).
Only trained, qualified crane operators and ground support staff
should handle and install this equipment.
When working with this equipment, observe precautions in the
literature, on tags, stickers, and labels attached to the
equipment, and any other safety precautions that might apply.
Training for operators of the lifting equipment should include, but
not be limited to, the following:
1. Application of the lifter to the load, and adjustment of the
lifts to adapt to various sizes or kinds of loads.
2. Instruction in any special operation or precaution.
3. Condition of the load as it relates to operation of the lifting
kit, such as balance, temperature, etc.
Follow all applicable safety codes. Wear safety shoes and work
gloves.
Inspection
Prior to initial use, and at monthly intervals, all rigging shackles,
clevis pins, and straps should be visually inspected for any
damage, evidence of wear, structural deformation, or cracks.
Particular attention should be paid to excessive wear at hoist
hooking points and load support areas. Materials showing any
kind of wear in these areas must not be used and should be
discarded.
UNIT FALLING HAZARD
Failure to follow this warning could result in personal
injury or death.
Never stand beneath rigged units or lift over people.
!WARNING
1. Leave top shipping skid on the unit for use as a spreader
bar to prevent the rigging straps from damaging the unit. If
the skid is not available, use a spreader bar of sufficient
length to protect the unit from damage.

4513 01 3402 02
FIGURE 3 MODEL SIZE 24−36 DIMENSIONS

5513 01 3402 02
FIGURE 4 MODEL SIZE 48 DIMENSIONS

6513 01 3402 02
FIGURE 5 ROOF CURB DIMENSIONS
RETURN
AIR
SMALL
BASE
UNIT
SUPPLY
AIR
LARGE
BASE
UNIT
UNIT PLACEMENT ON
COMMON CURB
LARGE CURB SMALL OR LARGE BASE UNIT
SMALL/COMMON CURB
ROOF CURB DETAIL
Wood nailer*
Roofcurb*
Insulation
(field supplied)
*Provided with roofcurb
Cant strip
field supplied
Roofing material
field supplied
Flashing field
supplied
HVAC unit
base rails
Roofcurb
Sealing
Gasket
HVAC unit
basepan
Anchor screw
A09090
A09413
A09094
A09415
C
B
AF
DE
Dashed lines show cross support
location for large basepan units.
G
H
C
B
A
F
D
E
G
H
Unit
Size
CATALOG
NUMBER
A
IN. (mm)
B (small base)
IN. (mm)*
B (large base)
IN. (mm)*
C
IN. (mm)
D
IN. (mm)
E
IN. (mm)
F
IN. (mm)
G
IN. (mm)
H
IN. (mm)
Small or
Large
CPRFCURB010A00 11 (279) 10 (254)
14 (356) 16 (406) 47.8
(1214)
32.4 (822)
2.7 (69)
30.6
(778) 46.1
(1170)
CPRFCURB011A00 14 (356)
Large CPRFCURB012A00 11 (279) 14 (356) 43.9
(1116)
42.2
(1072)
CPRFCURB013A00 14 (356)
* Part Numbers CPRCURB010A00 and CPRCURB011A00 can be used on both small and large basepan units. The cross supports must be located based on
whether the unit is a small basepan or a large basepan.
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip must be applied, as required, to unit being installed.
3. Roof curb is made of 16−gauge steel.
4. Attach ductwork to curb (flanges of duct rest on curb).
5. Insulated panels: 1−in. (25 mm) thick fiberglass 1 lb. density.

7513 01 3402 02
FIGURE 6 PH4E Suggested Rigging
ACCESS PANELS MUST BE IN PLACE WHEN RIGGING.
PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION.
50CY502286 2.0
CAUTION - NOTICE TO RIGGERS
PRUDENCE - AVIS AUX MANIPULATEUR
Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition
SEAL STRIP MUST BE IN
PLACE BEFORE PLACING
UNIT ON ROOF CURB
DUCTS
DETAIL A
VOIR DÉTAIL A
MINIMUM HEIGHT: 36" (914.4 mm)
HAUTEUR MINIMUM
UNIT HEIGHT
HAUTEUR D'UNITÉ
SEE DETAIL A
VOIR DÉTAIL A
BANDE SCELLANT DOIT ÊTRE
EN PLACE AVANT DE PLACER
L'UNITÉ SUR LA BASE DE TOIT
RIGGING WEIGHTS (SMALL CABINET) RIGGING WEIGHTS (LARGE CABINET)
Unit 24 30 36 Unit 48
lb kg lb kg lb kg lb kg
Rigging Weight 314 142.4 335 152.0 343 155.6 Rigging Weight 373 169.2
NOTE: See dimensional drawing for corner weight distribution.
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal
injury or death.
When straps are taut, the clevis should be a minimum
of 36 in. (914 mm) above the unit top cover.
!WARNING
Rigging/Lifting of Unit (See FIGURE 6)
Lifting holes are provided in base rails as shown.
1. Attach shackles, clevis pins, and straps to the base rails
of the unit. Be sure materials are rated to hold the weight
of the unit (See FIGURE 6).
2. Attach a clevis of sufficient strength in the middle of the
straps. Adjust the clevis location to ensure unit is lifted
level with the ground.
After the unit is placed on the roof curb or mounting pad, remove
the top skid.
Step 5 — Select and Install Ductwork
The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
non−residence type air conditioning and ventilating systems,
NFPA 90A or residence−type, NFPA 90B and/or local codes and
ordinances.
Select and size ductwork, supply−air registers, and return air
grilles according to ASHRAE (American Society of Heating,
Refrigeration, and Air Conditioning Engineers)
recommendations.
The unit has duct flanges on the supply−and return−air
openings on the side of the unit.
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal
injury or death.
For vertical supply and return units, tools or parts could
drop into ductwork Install a 90 degree turn in the
return ductwork between the unit and the conditioned
space. If a 90 degree elbow cannot be installed, then a
grille of sufficient strength and density should be
installed to prevent objects from falling into the
conditioned space. Units with electric heaters require
90 degree elbow in supply duct.
!WARNING
When designing and installing ductwork, consider the following:
1. All units should have field−supplied filters or accessory
filter rack installed in the return−air side of the unit.
Recommended sizes for filters are shown in Table 1.
2. Avoid abrupt duct size increases and reductions. Abrupt
change in duct size adversely affects air performance.
IMPORTANT: Use flexible connectors between ductwork and
unit to prevent transmission of vibration. Use suitable gaskets to
ensure weather tight and airtight seal. When electric heat is
installed, use fireproof canvas (or similar heat resistant material)
connector between ductwork and unit discharge connection. If
flexible duct is used, insert a sheet metal sleeve inside duct.
Heat resistant duct connector (or sheet metal sleeve) must
extend 24−in. (610 mm) from electric heater element.

8513 01 3402 02
3. Size ductwork for cooling air quantity (cfm). The minimum
air quantity for proper electric heater operation is listed in
Table 2. Heater limit switches may trip at air quantities
below those recommended.
4. Seal, insulate, and weatherproof all external ductwork.
Seal, insulate and cover with a vapor barrier all ductwork
passing through conditioned spaces. Follow latest Sheet
Metal and Air Conditioning Contractors National
Association (SMACNA) and Air Conditioning Contractors
Association (ACCA) minimum installation standards for
residential heating and air conditioning systems.
5. Secure all ducts to building structure. Flash, weatherproof,
and vibration−isolate duct openings in wall or roof
according to good construction practices.
CONFIGURING UNITS FOR DOWNFLOW (VERTICAL)
DISCHARGE
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing service or maintenance operations
on the system, turn off main power to unit and install
lockout tag.
!WARNING
1. Open all electrical disconnects and install lockout tag
before starting any service work.
2. Remove horizontal (metal) ductcovers to access vertical
(downflow) discharge duct knockouts in unit basepan.
(See FIGURE 7.)
3. To remove downflow return and supply knockout covers,
break front and right side connecting tabs with a screw
driver and hammer. Push cover down to break rear and
left side tabs.
NOTE: These panels are held in place with tabs similar to an
electrical knockout. Reinstall horizontal duct covers (FIGURE 7)
shipped on unit from factory. Insure openings are air and
watertight.
NOTE: The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
nonresidence−type air conditioning and ventilating systems,
NFPA 90A or residence−type, NFPA 90B; and/or local codes
and ordinances.
Adhere to the following criteria when selecting, sizing, and
installing the duct system:
1. Units are shipped for side shot installation.
2. Select and size ductwork, supply−air registers, and
return−air grilles according to American Society of
Heating, Refrigeration and Air Conditioning Engineers
(ASHRAE) recommendations.
3. Use flexible transition between rigid ductwork and unit to
prevent transmission of vibration. The transition may be
screwed or bolted to duct flanges. Use suitable gaskets to
ensure weather−tight and airtight seal.
4. All units must have field−supplied filters or accessory filter
rack installed in the return−air side of the unit.
Recommended sizes for filters are shown in Table 1.
5. Size all ductwork for maximum required airflow (either
heating or cooling) for unit being installed. Avoid abrupt
duct size increases or decreases or performance may be
affected.
6. Adequately insulate and weatherproof all ductwork located
outdoors. Insulate ducts passing through unconditioned
space, and use vapor barrier in accordance with latest
issue of Sheet Metal and Air Conditioning Contractors
National Association (SMACNA) and Air Conditioning
Contractors of America (ACCA) minimum installation
standards for heating and air conditioning systems.
Secure all ducts to building structure.
7. Flash, weatherproof, and vibration−isolate all openings in
building structure in accordance with local codes and
good building practices.
FIGURE 7 Supply and Return Duct Opening
Horizontal Duct Covers
Basepan
Downflow
(Vertical)
Supply
Knockout
Basepan
Downflow
(Vertical)
Return
Knockout
Step 6 — Provide for Condensate Disposal
NOTE: Ensure that condensate−water disposal methods comply
with local codes, restrictions, and practices.
The PH4E units dispose of condensate through a 3/4 in. NPT
female fitting that exits on the compressor end of the unit.
Condensate water can be drained directly onto the roof in
rooftop installations (where permitted) or onto a gravel apron in
ground level installations. Install a field−supplied condensate
trap at end of condensate connection to ensure proper drainage.
Make sure that the outlet of the trap is at least 1 in. (25 mm)
lower than the drain−pan condensate connection to prevent the
pan from overflowing. Prime the trap with water. When using a
gravel apron, make sure it slopes away from the unit.
If the installation requires draining the condensate water away
from the unit, install a field−supplied 2 −in. (51mm) trap at the
condensate connection to ensure proper drainage. Condensate
trap is available as an accessory or is field−supplied. Make sure
that the outlet of the trap is at least 1 in. (25 mm) lower than the
unit drain−pan condensate connection to prevent the pan from
overflowing. Connect a drain tube using a minimum of
field−supplied 3/4−in. PVC or field−supplied 3/4−in. copper pipe
at outlet end of the 2−in. (51 mm) trap. (See FIGURE 8) Do not
undersize the tube. Pitch the drain tube downward at a slope of
at least 1 in. (25 mm) every 10 ft (3 m) of horizontal run. Be sure
to check the drain trough for leaks. Prime the trap at the
beginning of the cooling season start−up.

9513 01 3402 02
FIGURE 8 Condensate Trap
TRAP
OUTLET
1-in. (25 mm) min.
2-in. (51 mm) min.
FIGURE 9 Unit Leveling Tolerances
A
B
C
MAXIMUM ALLOWABLE
DIFFERENCE in. (mm)
A-C
1/4 1/4 1/4
(6.35) (6.35) (6.35)
A-B B-C
Step 7 — Install Electrical Connections
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in damage to
the unit being installed.
1. Make all electrical connections in accordance
with NEC NFPA 70 (latest edition) and local
electrical codes governing such wiring. In
Canada, all electrical connections must be in
accordance with CSA standard C22.1 Canadian
Electrical Code Part 1 and applicable local
codes. Refer to unit wiring diagram.
2. Use only copper conductor for connections
between field−supplied electrical disconnect
switch and unit. DO NOT USE ALUMINUM
WIRE.
3. Be sure that high−voltage power to unit is within
operating voltage range indicated on unit rating
plate. On 3−phase units, ensure phases are
balanced within 2 percent. Consult local power
company for correction of improper voltage
and/or phase imbalance.
4. Do not damage internal components when
drilling through any panel to mount electrical
hardware, conduit, etc.
!CAUTION
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
The unit cabinet must have an uninterrupted,
unbroken electrical ground. This ground may consist
of an electrical wire connected to the unit ground
screw in the control compartment, or conduit
approved for electrical ground when installed in
accordance with NEC,NFPA 70 National Fire
Protection Association (latest edition) (in Canada,
Canadian Electrical Code CSA C22.1) and local
electrical codes.
!WARNING
High−Voltage Connections
The unit must have a separate electrical service with a
field−supplied, waterproof disconnect switch mounted at, or
within sight from the unit. Refer to the unit rating plate, NEC and
local codes for maximum fuse/circuit breaker size and minimum
circuit amps (ampacity) for wire sizing.
The field−supplied disconnect may be mounted on the unit over
the high−voltage inlet hole when the standard power and
low−voltage entry points are used. See FIGURE 3 and
FIGURE 4 for acceptable location. Remove high voltage
knockout.
See unit wiring label (FIGURE 12) and FIGURE 10 for reference
when making high voltage connections. Proceed as follows to
complete the high−voltage connections to the unit.
FIGURE 10 High and Control−Voltage Connections
POWER
SUPPLY
FIELD-SUPPLIED
FUSED DISCONNECT
HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)
EQUIP GR
CONTROL BOX
W1
Y
G
R
C
THERMOSTAT
(TYPICAL)
W2
O
SPLICE BOX
LOW-VOLTAGE
TERMINAL BOARD
(SEE UNIT)
WIRING LABEL
W2
W1
Y1
G
R
C
Y2
1. Run the high−voltage (L1, L2, L3) and ground lead into the
control box.
2. Connect ground lead to chassis ground connection.
3. Locate the black, yellow and blue wires connected to the
line side of the terminal block.
4. Connect field L1 to black wire.
5. Connect field wire L2 to yellow wire.
6. Connect field wire L3 to blue wire.

10 513 01 3402 02
Control Voltage Connections
NOTE: Do not use any type of power−stealing thermostat. Unit
control problems may result.
Use no. 18 American Wire Gage (AWG) color−coded, insulated
(35°C minimum) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
more than 100 ft (30.5 m) from the unit (as measured along the
control voltage wires), use no. 16 AWG color−coded, insulated
(35°C minimum) wires.
Standard Connections
Locate the low voltage terminal board in 24 volt splice box. See
FIGURE 10 for connection diagram. Run the low−voltage leads
from the thermostat, through the control wiring inlet hole
grommet (FIGURE 3 and FIGURE 4), and into the low−voltage
splice box. Provide a drip loop before running wires through
panel. Secure and strain relief all wires so that they do not
interfere with operation of unit.
If an accessory electric heater is installed, low voltage leads from
heater must be connected to low voltage terminal board W1 and
C terminals.
Transformer Protection
The transformer is protected by a 24 volt circuit breaker. If an
overload or short is present, correct overload condition and reset
24 volt circuit breaker.
Special Procedures for 420−v Operations
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, always turn off
main power to system and install lockout tag.
!WARNING
The transformer in the unit has two taps, 380 and 415 volts. For
power supplies above 400 volts, the transformer must be
connected to the 415 volt tap. With power off, disconnect blue
wire from transformer splice connection and connect black wire
from transformer to splice connection. Insulate unused blue
transformer tap. See transformer label. During unit start−up,
check secondary voltage to ensure that a minimum of 20 volts is
available during unit operation, and that voltage does not exceed
29 volts while unit is off.
Accessory Electric Heaters Installation
Electric heaters may be installed with the PH4E units per
instructions supplied with electric heater package. See unit rating
plate for factory−approved electric heater kits.
Sequence of Operation
a. CONTINUOUS FAN
(1.) Thermostat closes circuit R to G energizing the
blower motor for continuous fan.
b. COOLING MODE
(1.) If indoor temperature is above temperature set
point, thermostat closes circuits R to G, R to Y1
and R to O (Y2). The compressor, indoor and
outdoor fans, and reversing valve are energized.
c. ELECTRIC HEATING MODE
(1.) Thermostat closes circuit R to W/W1, or W2 and R
to G. There are no on or off delays.
d. HEAT PUMP HEATING MODE
(1.) Thermostat closes circuits R to G and R to Y1.
The compressor, indoor and outdoor fans are
energized.
e. HEAT PUMP HEATING WITH AUXILIARY ELECTRIC
HEAT
(1.) Thermostat closes circuits R to G, R to Y1 and R
to W/W1 or W2. The compressor, indoor and
outdoor fans are energized, as well as the electric
heat relays.
f. DEFROST MODE
The defrost mode is automatically energized by the
defrost board during heating mode. The defrost board
energizes “O” (reversing valve) and “W2” (electric
heat). It also de−energizes the outdoor fan. When
defrost is complete, unit will return to heating mode. If
room thermostat is satisfied during defrost, unit will
shut down and restart in defrost on next call for heat.
FIGURE 11 Typical Installation
INDOOR
THERMOSTAT
DISCONNECT
PER NEC
FROM
POWER
SOURCE
RETURN
AIR
TOP COVER
POWER ENTRY
CONTROL ENTRY

11513 01 3402 02
Table 1 – Physical Data −Unit PH4E
UNIT SIZE PH4E24 PH4E30 PH4E36 PH4E48
NOMINAL CAPACITY (ton)
(kW)
2
7
2.5
8.8
3
10.6
4
14.1
OPERATING WEIGHT (lb)
(kg)
314
142.4
335
152.0
343
155.6
373
169.2
COMPRESSOR QUANTITY 1
TYPE SCROLL COMPRESSOR
REFRIGERANT R−410A
METERING DEVICE ID Piston
Refrigerant (R−410A) Quantity (lb)
Quantity (kg)
6.9
3.2
9.6
4.0
10.0
4.2
12.0
4.8
ORIFICE ID (in.)
(mm)
0.059
1.55
0.061
1.55
0.067
1.70
0.078
1.93
ORIFICE OD (in.)
(mm)
0.032 (2)
.81
0.040 (2)
1.02
0.040 (2)
1.02
0.046 (2)
1.17
OUTDOOR COIL
Rows... Fins/in.
Rows... Fins (cm)
face area (sq. ft.)
face area (sq. m)
2...17
2...6.7
8.5
.79
2...17
2...6.7
10.3
.96
2...17
2...6.7
10.3
.96
2...17
2...6.7
13.5
1.25
OUTDOOR FAN
Nominal Airflow (CFM)
Nominal Airflow (L/s)
Diameter (in)
Diameter (mm)
Motor HP (RPM)
Motor (W)
Motor (r/s)
2200
1038
22
559
1/4 (900)
187
.187...15
2200
1038
22
559
1/4 (900)
187
.187...15
2200
1038
22
559
1/4 (900)
187
.187...15
2400
1133
22
559
1/3 (1340)
249
.249...22
INDOOR COIL
Rows... Fins/in.
Rows... Fins (cm)
face area (sq. ft.)
face area (sq. m)
3...15
3...5.9
3.7
.34
3...15
3...5.9
3.7
.34
4...15
4...5.9
3.7
.34
4...15
4...5.9
4.7
.44
INDOOR BLOWER
Nominal Cooling Airflow (CFM)
Nominal Cooling Airflow (L/s)
Size (in.)
Size (cm)
Motor (HP)
Motor (W)
800
378
10x10
25.4x25.4
1/4
187
1000
472
10x10
25.4x25.4
1/2
373
1200
566
10x10
25.4x25.4
1/2
373
1600
708
11x10
27.9x25.4
1.0
746
HIGH−PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
Cutout (kPA)
Reset (Auto) (kPa)
650+15
420+25
4482+103
2896+172
LOSS−OF−CHARGE/LOW−PRESSURE SWITCH
(Liquid Line) (psig) Cutout Reset (Auto)
Cutout (kPA)
Reset (Auto) (kPa)
20+5
45+10
138+34
310+69
RETURN−AIR FILTERS*{
throwaway (in.)
(mm)
20x20x1
508x508x25
20x20x1
508x508x25
24x24x1
610x610x25
24x30x1
610x762x25
*Required filter sizes shown are based on the larger of the ARI (Air conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 ft/min
ute for throwaway type or 450 ft/minute for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 IN. W.C.
If using accessory filter rack refer to the filter rack installation instructions for correct filter size and quantity.
Table 2 – Minimum Airflow for Reliable Electric Heater Operation (CFM)
SIZE PH4E24 PH4E30 PH4E36 PH4E48
AIRFLOW (CFM) 800 1000 1200 1600
AIRFLOW (L/s) 378 472 567 756

12 513 01 3402 02
FIGURE 12 Wiring Diagram, 400−3−50

13513 01 3402 02
PRE−START−UP
FIRE, EXPLOSION, ELECTRICAL AND
ENVIRONMENTAL SHOCK HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
1. Follow recognized safety practices and wear
protective goggles when checking or servicing
refrigerant system.
2. Relieve and recover all refrigerant from system before
touching or disturbing compressor plug if refrigerant
leak is suspected around compressor terminals.
3. Do not remove compressor plug until all electrical
sources are disconnected and tagged.
4. Never attempt to repair soldered connection while
refrigerant system is under pressure.
5. Do not use torch to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective goggles and
proceed as follows:
a. Shut off electrical power to unit and install lockout
tag.
b. Relieve and reclaim all refrigerant from system
using both high−and low−pressure ports.
c. Cut component connecting tubing with tubing
cutter and remove component from unit.
d. Carefully unsweat remaining tubing stubs when
necessary. Oil can ignite when exposed to torch
flame.
!WARNING
Use the Start−Up Checklist supplied at the end of this book and
proceed as follows to inspect and prepare the unit for initial
start−up:
1. Remove all access panels (see FIGURE 16).
2. Read and follow instructions on all DANGER, WARNING,
CAUTION, and INFORMATION labels attached to, or
shipped with, unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as
broken lines, loose parts, disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections and
on unit base. Detecting oil generally indicates a
refrigerant leak. Leak−test all refrigerant tubing
connections using electronic leak detector, or
liquid−soap solution. If a refrigerant leak is detected,
see following Check for Refrigerant Leaks section.
c. Inspect all field and factory−wiring connections. Be
sure that connections are completed and tight. Ensure
wires do not touch refrigerant tubing or sharp sheet
metal edges.
d. Inspect coil fins. If damaged during shipping and
handling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. Make sure that outdoor−fan blade is correctly
positioned in fan orifice.
b. Make sure that air filter(s) is in place.
c. Make sure that condensate drain pan and trap are
filled with water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts
have been removed.
5. Each unit system has 2 Schrader−type ports, one
low−side Schrader fitting located on the suction line, and
one high−side Schrader fitting located on the compressor
discharge line. Be sure that caps on the ports are tight.
START−UP
Checking Cooling and Heating Control Operation
Start and check the unit for proper control operation as follows:
(1.) Place room thermostat SYSTEM switch or MODE
control in OFF position. Observe that blower motor
starts when FAN mode is placed in FAN ON
position and shuts down when FAN MODE switch
is placed in AUTO position.
(2.) Place SYSTEM switch in cool mode. Lower
setpoint to call for cooling. Observe that
compressor, indoor and outdoor fans start and
deliver cooling.
(3.) Place SYSTEM switch or MODE control in HEAT
position. Set control above room temperature.
Observe that compressor, outdoor fan, and indoor
blower motors start. Observe that heating cycle
shuts down when control setting is satisfied.
NOTE: Once the compressor has started and then has stopped,
it should not be started again until 5 minutes have elapsed. The
defrost board has a built−in 5 minute delay between cycles. The
5 minute compressor delay also applies to heat pump heating
mode.
Step 1 — Check for Refrigerant Leaks
Proceed as follows to locate and repair a refrigerant leak and to
charge the unit:
1. Locate leak and make sure that refrigerant system
pressure has been relieved and reclaimed from both high−
and low−pressure ports.
2. Repair leak following Refrigerant Service procedures.
NOTE: Install a bi−flow filter drier whenever the system has been
opened for repair.
3. Add a small charge of R−410A refrigerant vapor to system
and leak−test unit.
4. Recover refrigerant from refrigerant system and evacuate
to 500 microns if no additional leaks are not found.
5. Charge unit with R−410A refrigerant, using an electronic
scale. Refer to unit rating plate for required charge.
Step 2 — Start−Up Adjustments
Complete the required procedures given in the Pre−Start−Up
section before starting the unit. Do not jumper any safety devices
when operating the unit. Do not operate the unit in Cooling mode
when the outdoor temperature is below 40F (4C) (unless
accessory low−ambient kit is installed).
IMPORTANT: Three−phase, scroll compressors are direction
oriented. Unit must be checked to ensure proper compressor
3−phase power lead orientation. If not corrected within 5
minutes, the internal protector will shut off the compressor. The
3−phase power leads to the unit must be reversed to correct
rotation. When turning backwards, the difference between
compressor suction and discharge pressures may be minimal

14 513 01 3402 02
FIGURE 13 Phase Monitor Control and LED Indicators
LED STATUS
OFF No Call for compressor operation
FLASHING Reversed phase
ON Normal
Checking and Adjusting Refrigerant Charge
The refrigerant system is fully charged with R−410A refrigerant
and is tested and factory sealed.
NOTE: Adjustment of the refrigerant charge is not required
unless the unit is suspected of not having the proper R−410A
charge.
A superheat charging chart is attached to the inside of the
compressor access panel (see FIGURE 16). The chart includes
the required suction line temperature at given suction line
pressures and outdoor ambient temperatures.
An accurate thermocouple−or thermistor−type thermometer,
and a gauge manifold are required when using the superheat
charging method for evaluating the unit charge. Do not use
mercury or small dial−type thermometers because they are not
adequate for this type of measurement.
NOTE: Allow system to operate for a minimum of 15 minutes
before checking or adjusting refrigerant charge.
IMPORTANT: When evaluating the refrigerant charge, an
indicated adjustment to the specified factory charge must always
be very minimal. If a substantial adjustment is indicated, an
abnormal condition exists somewhere in the cooling system,
such as insufficient airflow across either coil or both coils.
Proceed as follows:
1. Remove cap from low pressure service fitting.
2. Using hoses with valve core depressors, attach low pres-
sure gauge hose to low pressure service fitting.
3. Start the unit in cooling mode and let run until system
pressures stabilize.
4. Measure and record the following:
a. Outdoor ambient−air temperature (°C) db.
b. Evaporator inlet−air temperature (°C) wb.
c. Suction−tube temperature (°C) at low−side service
fitting.
d. Suction (low−side) pressure (kPA).
5. Using “Cooling Charging Tables” compare outdoor−air
temperature (°C) db with the entering evaporator air
temperature (°C) wb to determine desired superheat
temperature. (See FIGURE 14).
6. Using the superheat value in step 5, locate the intersec-
tion of the required superheat with the suction pressure
previously measured. Note the required suction tube
temperature. Using a tolerance of +/−(1.7°C), add refri-
gerant if actual temperature is higher than charted suction
tube temperature, or remove refrigerant if actual temper-
ature is lower than charted suction tube temperature.
NOTE: If the problem causing the inaccurate readings is a
refrigerant leak, refer to Check for Refrigerant Leaks section.
FIGURE 14 Cooling Charging Table −Superheat
50ES500443 - 2.0

15513 01 3402 02
Indoor Airflow and Airflow Adjustments
UNIT OPERATION HAZARD
Failure to follow this caution may result in unit
damage.
For heating and cooling operation, the recommended
airflow is 350 to 450 cfm for each 12,000 Btuh (165
L/s to 212 for each 3.5 kW) of rated cooling capacity.
For units with optional electric heat, the airflow must
not be reduced below the levels stated in Table 1.
CAUTION
!
NOTE: Be sure that all supply−and return−air grilles are open,
free from obstructions, and adjusted properly.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power to the unit and install
lockout tag before changing blower speed.
!WARNING
Table 3 – Color Coding for Indoor Fan Motor Leads
Black = High Speed
Blue = Med Speed (if available)
Red = Low Speed
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power to the unit and install
lockout tag before changing blower speed.
!WARNING
To change the speed of the indoor fan motor, remove the fan
lead from the splice connection. Replace with the desired fan
speed lead. Insulate the unused lead to prevent shorting.
Table 4 – Wet Coil Air Delivery
ENGLISH
400 VOLT
UNIT MOTOR
SPEED
EXTERNAL STATIC PRESSURE (in. W.C)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
PH4E24
Low Watts 303 305 306 300 − − − − − − −
Cfm 969 879 785 687 − − − − − − −
High Watts − − − − 435 428 428 422 − − −
Cfm − − − − 963 833 758 676 − − −
PH4E30
Low Watts −1002 954 921 889 853 814 − − − −
Cfm −1189 1115 1041 971 903 833 − − − −
High Watts −−−−−−−700 683 688 755
Cfm −−−−−−−1223 1142 1075 1058
PH4E36
Low Watts 552 540 529 523 514 480 − − − − −
Cfm 1296 1237 1167 1097 1029 952 − − − − −
High Watts − − − − − 782 765 736 721 780 1002
Cfm − − − − − 1467 1398 1321 1237 1165 1137
PH4E48
Low Watts 692 686 678 664 652 664 736 − − − −
Cfm 1571 1509 1444 1370 1295 1240 1237 − − − −
High Watts − − 1112 930 856 834 825 811 793 − −
Cfm − − 1693 1670 1601 1521 1447 1378 1294 − −
SI
400 VOLT
UNIT MOTOR
SPEED
EXTERNAL STATIC PRESSURE (Pa)
025 50 75 100 125 150 175 200 225 250
PH4E24
Low Watts 303 305 303 300 − − − − − − −
L/s 458 415 371 324 − − − − − − −
High Watts − − − − 435 428 428 422 − − −
L/s − − − − 455 393 358 319 − − −
PH4E30
Low Watts −1002 954 921 889 853 814 − − − −
L/s −561 526 491 458 426 393 − − − −
High Watts −−−−−−−700 683 688 755
L/s −−−−−−−577 539 508 499
PH4E36
Low Watts 552 540 529 523 514 480 − − − − −
L/s 612 584 551 518 486 449 − − − − −
High Watts − − − − − 782 765 736 721 780 1002
L/s − − − − − 693 660 624 584 550 536
PH4E48
Low Watts 692 686 678 664 652 664 736 − − − −
L/s 741 712 681 647 611 585 584 − − − −
High Watts − − 1112 930 856 834 825 811 793 − −
L/s − − 799 788 756 718 683 650 611 − −
*Air delivery values are based on operating voltage of 400−v, wet coil, without filter or electric heater.
NOTES: 1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh (165 L/s for each 3.5 kW) of rated cooling capacity.
Evaporator coil frosting may occur at airflow below this point.
2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.

16 513 01 3402 02
Table 5 – Filter Pressure Drop (IN. W.C.) (Pa)
FILTER SIZE
in.
CFM
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
20X20X1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 — — — — — — — — — — —
20X24X1 — — — −0.09 0.10 0.11 0.13 0.14 0.15 0.16 — — — — — — — —
24X30X1 — — — − − − − 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18
FILTER SIZE
mm
L/s
236 283 330 378 425 472 519 566 614 661 707 755 802 850 896 944 991 1038 1085
508X508X25 12.4 17.4 19.9 24.9 29.9 32.3 34.8 37.3 — — — — — — — — — — —
508X610x25 — — — −22.4 24.9 27.4 32.3 34.8 37.4 39.9 — — — — — — — —
610X762x25 — — — − − − − 17.4 19.9 22.4 24.9 27.4 29.9 32.3 34.8 37.3 39.8 42.3 44.6
Table 6 – Accessory Electric Heat Pressure Drop IN. W.C. (Pa)
HEATER kW CFM
600 800 1000 1200 1400 1600 1800 2000 2200
6.5−17.4
0.030 0.033 0.037 0.042 0.047 0.052 0.060 0.067 0.075
L/s
283 378 472 569 661 755 850 944 1038
7.5 8.2 9.2 10.4 11.7 12.9 14.9 16.7 18.7
Step 3 — Defrost Control
Quiet Shift
Quiet Shift is a field−selectable defrost mode, which will
eliminate occasional noise that could be heard at the start of
defrost cycle and restarting of heating cycle. It is selected by
placing DIP switch 3 (on defrost board) in ON position.
When Quiet Shift switch is placed in ON position, and a defrost
is initiated, the following sequence of operation will occur.
Reversing valve will energize, outdoor fan will turn off,
compressor will turn off for 30 sec and then turn back on to
complete defrost. At the start of heating after conclusion of
defrost reversing valve will de−energize, compressor will turn off
for another 30 sec, and the outdoor fan will stay off for 40 sec,
before starting in the Heating mode.
FIGURE 15 Defrost Control
OF2
OF1
ON
QUIET SHIFT
120
30 60
60 30
90
INTERVAL TIMER OFF
P3
DFT
O R W
2
Y C
T2 C C O
DFT
T1 Y P1 J1
SPEEDUP
Speedup
Pins
Defrost interval
DIP switches
Quiet
Shift

17513 01 3402 02
Defrost
The defrost control is a time/temperature control which includes
a field−selectable time period (DIP switch 1 and 2 on the board)
between defrost cycles of 30, 60, 90, or 120 minutes (factory set
at 60 minutes). To initiate a forced defrost, two options are
available depending on the status of the defrost thermostat.
If defrost thermostat is closed, speed−up pins (J1) must be
shorted by placing a flat head screw driver in between for 5 sec
and releasing, to observe a complete defrost cycle. When the
Quiet Shift switch is selected, compressor will be turned off for
two 30 sec intervals during this complete defrost cycle, as
explained previously. When Quiet Shift switch is in factory default
OFF position, a normal and complete defrost cycle will be
observed.
If defrost thermostat is in open position, and speedup pins are
shorted (with a flat head screw driver) for 5 sec and released, a
short defrost cycle will be observed (actual length is dependent
upon the selected Quiet Shift position). When Quiet Shift switch
is in ON position, the length of defrost is 1 minute (30 sec
compressor off period followed by 30 sec of defrost with
compressor operation). On return to heating operation,
compressor will again turn off for an additional 30 sec and the
outdoor fan for 40 sec. When the Quiet Shift is in OFF position,
only a brief 30 sec. cycle will be observed.
NOTE: Unit will remain in defrost until defrost thermostat reopens
at approximately 65F +/−5F (18C +/−2.8C) coil temperature
at liquid line or remainder of defrost cycle time.
MAINTENANCE
To ensure continuing high performance, and to minimize the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This heat pump unit
should be inspected at least once each year by a qualified
service person. To troubleshoot unit, refer to Table 7.
NOTE: TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal
injury or death and unit component damage.
The ability to properly perform maintenance on this
equipment requires certain expertise, mechanical
skills, tools and equipment. If you do not possess
these, do not attempt to perform any maintenance on
this equipment, other than those procedures
recommended in the Owner’s Manual.
!WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow these warnings could result in
personal injury or death:
1. Turn off electrical power to the unit and install a
lockout tag before performing any maintenance
or service on this unit.
2. Use extreme caution when removing panels
and parts.
3. Never place anything combustible either on
or in contact with the unit.
!WARNING
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper
operation.
Errors made when reconnecting wires may cause
improper and dangerous operation. Label all wires
prior to disconnecting when servicing.
CAUTION
!
The minimum maintenance requirements for this equipment are
as follows:
1. Inspect air filter(s) each month. Clean or replace when
necessary.
2. Inspect indoor coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean when necessary.
3. Inspect blower motor and wheel for cleanliness each
cooling season. Clean when necessary.
4. Check electrical connections for tightness and controls for
proper operation each cooling season. Service when
necessary.
Step 1 — Air Filter
IMPORTANT: Never operate the unit without a suitable air filter in
the return−air duct system. Always replace the filter with the
same dimensional size and type as originally installed. See
Table 1 for recommended filter sizes.
Inspect air filter(s) at least once each month and replace
(throwaway−type) or clean (cleanable−type) at least twice during
each cooling season and twice during the heating season, or
whenever the filter becomes clogged with dust and lint.
Indoor Blower and Motor
NOTE: All motors are pre−lubricated. Do not attempt to lubricate
these motors.
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect and tag electrical power to the unit before
cleaning the blower motor and wheel.
!WARNING
To clean the blower motor and wheel:
1. Remove and disassemble blower assembly as follows:
a. Remove blower access panel (see FIGURE 16).
b. Disconnect indoor blower motor. Remove capacitor if
required.
c. On all units remove blower assembly from unit.
Remove screws securing blower to blower partition
and slide assembly out. Be careful not to tear
insulation in blower compartment.
d. Ensure proper reassembly by marking blower wheel
and motor in relation to blower housing before
disassembly.
e. Loosen setscrew(s) that secures wheel to motor shaft,
remove screws that secure motor mount brackets to
housing, and slide motor and motor mount out of
housing.
2. Remove and clean blower wheel as follows:
a. Ensure proper reassembly by marking wheel
orientation.

18 513 01 3402 02
b. Lift wheel from housing. When handling and/or
cleaning blower wheel, be sure not to disturb balance
weights (clips) on blower wheel vanes.
c. Remove caked−on dirt from wheel and housing with a
brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using soft
brush attachment. Remove grease and oil with mild
solvent.
d. Reassemble wheel into housing.
e. Reassemble motor into housing. Be sure setscrews
are tightened on motor shaft flats and not on round
part of shaft. Reinstall blower into unit. Reinstall capa-
citor.
f. Reconnect blower motor wiring.
g. Reinstall blower access panel (see FIGURE 16).
3. Restore electrical power to unit. Start unit and check for
proper blower rotation and motor speeds during cooling
cycles.
FIGURE 16 Unit Access Panels
Compressor
Access Panel
Blower
Access
Panel
Control
Access
Panel
Step 2 — Outdoor Coil, Indoor Coil, and Conden-
sate Drain Pan
Inspect the condenser coil, evaporator coil, and condensate
drain pan at least once each year.
The coils are easily cleaned when dry; therefore, inspect and
clean the coils either before or after each cooling season.
Remove all obstructions, including weeds and shrubs, that
interfere with the airflow through the condenser coil.
Straighten bent fins with a fin comb. If coated with dirt or lint,
clean the coils with a vacuum cleaner, using the soft brush
attachment. Be careful not to bend the fins. If coated with oil or
grease, clean the coils with a mild detergent−and−water solution.
Rinse coils with clear water, using a garden hose. Be careful not
to splash water on motors, insulation, wiring, or air filter(s). For
best results, spray condenser coil fins from inside to outside the
unit. On units with an outer and inner condenser coil, be sure to
clean between the coils. Be sure to flush all dirt and debris from
the unit base.
Inspect the drain pan and condensate drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing
all foreign matter from the pan. Flush the pan and drain trough
with clear water. Do not splash water on the insulation, motor,
wiring, or air filter(s). If the drain tube is restricted, clear it with a
plumbers snake or similar probe device.
Step 3 — Outdoor Fan
Keep the condenser fan free from all obstructions to ensure
proper cooling operation. Never place articles on top of the
unit. Damage to unit may result.
1. Remove 6 screws holding outdoor grille and motor to top
cover.
2. Turn motor/grille assembly upside down on top cover to
expose fan blade.
3. Inspect the fan blades for cracks or bends.
4. If fan needs to be removed, loosen setscrew and slide fan
off motor shaft.
5. When replacing fan blade, position blade back to same
position as before.
6. Ensure that setscrew engages the flat area on the motor
shaft when tightening.
7. Replace grille.
Step 4 — Electrical Controls and Wiring
Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical power to the unit.
Remove access panels (see FIGURE 16) to locate all the
electrical controls and wiring. Check all electrical connections for
tightness. Tighten all screw connections. If any discolored or
burned connections are noticed, disassemble the connection,
clean all the parts, restrip the wire end and reassemble the
connection properly and securely.
After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation. If discrepancies are observed
in operating cycle, or if a suspected malfunction has occurred,
check each electrical component with the proper electrical
instrumentation. Refer to the unit wiring label when making these
checkouts.

19513 01 3402 02
FIGURE 17 Typical Heat Pump Operation, Cooling Mode
COMPRESSOR
ACCUMULATOR
OUTDOOR COIL INDOOR COIL
LCS
LEGEND
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater
®
Metering Device
Arrow indicates direction of flow
TXV in Metering
Position
Bypass
Position
HPS
FIGURE 18 Typical Heat Pump Operation, Heating Mode
COMPRESSOR
ACCUMULATOR
OUTDOOR COIL INDOOR COIL
LCS
LEGEND
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater
®
Metering Device
Arrow indicates direction of flow
Position
HPS
TXV in Bypass
Metering
Position
Step 5 — Refrigerant Circuit
Inspect all refrigerant tubing connections and the unit base for oil
accumulation annually. Detecting oil generally indicates a
refrigerant leak.
If oil is detected or if low performance is suspected, leak−test all
refrigerant tubing using an electronic leak detector, or
liquid−soap solution. If a refrigerant leak is detected, refer to
Check for Refrigerant Leaks section.
If no refrigerant leaks are found and low performance is
suspected, refer to Checking and Adjusting Refrigerant Charge
section.
Step 6 — Indoor Airflow
The heating and/or cooling airflow does not require checking
unless improper performance is suspected. If a problem exists,
be sure that all supply−air and return−air grilles are open and
free from obstructions, and that the air filter is clean. When
necessary, refer to Indoor Airflow and Airflow Adjustments
section to check the system airflow.
Step 7 — Metering Device −Piston
This unit uses a fixed orifice metering device for both cooling and
heating modes.
FIGURE 19 Refrigerant Circuit

20 513 01 3402 02
Step 8 — Pressure Switches
Pressure switches are protective devices wired into control
circuit (low voltage). They shut off compressor if abnormally high
or low pressures are present in the refrigeration circuit. These
pressure switches are specifically designed to operate with
R−410A systems. R−22 pressure switches must not be used as
replacements for the R−410A system.
Step 9 — Loss of Charge Switch
This switch is located on the liquid line and protects against low
suction pressures caused by such events as loss of charge, low
airflow across indoor coil, dirty filters, etc. It opens on a pressure
drop at about 20 psig (138 kPa). If system pressure is above
this, switch should be closed. To check switch:
1. Turn off all power to unit.
2. Disconnect leads on switch.
3. Apply ohm meter leads across switch. You should have
continuity on a good switch.
NOTE: Because these switches are attached to refrigeration
system under pressure, it is not advisable to remove this device
for troubleshooting unless you are reasonably certain that a
problem exists. If switch must be removed, remove and recover
all system charge so that pressure gauges read 0 psi. Never
open system without breaking vacuum with dry nitrogen.
Step 10 — High−Pressure Switch
The high−pressure switch is located in the discharge line and
protects against excessive condenser coil pressure. It opens at
650 psig (4482 kPa).
High pressure may be caused by a dirty outdoor coil, failed fan
motor, or outdoor air recirculation.
To check switch:
1. Turn off all power to unit.
2. Disconnect leads on switch.
3. Apply ohm meter leads across switch. You should have
continuity on a good switch.
Step 11 — Copeland Scroll Compressor (R−410A
Refrigerant)
The compressor used in this product is specifically designed to
operate with R−410A refrigerant and cannot be interchanged.
EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death or property damage.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerant and oils.
!WARNING
The scroll compressor pumps refrigerant throughout the system
by the interaction of a stationary and an orbiting scroll. The scroll
compressor has no dynamic suction or discharge valves, and it
is more tolerant of stresses caused by debris, liquid slugging,
and flooded starts. The compressor is equipped with an internal
pressure relief port. The pressure relief port is a safety device,
designed to protect against extreme high pressure. The relief
port has an operating range between 550 and 625 psi differential
pressure (3792 and 4309 kPa).
Step 12 — Refrigerant System
This step covers the refrigerant system of the PH4E, including
the compressor oil needed, servicing systems on roofs
containing synthetic materials, the filter drier and refrigerant
charging.
Refrigerant
PROPERTY HAZARD, PERSONAL INJURY OR
ENVIRONMENTAL HAZARD
Failure to follow this warning could result in property
damage or personal injury or death.
This system uses R−410A refrigerant which has
higher operating pressures than R−22 and other
refrigerants. No other refrigerant may be used in this
system. Gauge set, hoses, and recovery system must
be designed to handle R−410A. If you are unsure
consult the equipment manufacturer.
!WARNING
Compressor Oil
The Copeland scroll compressor uses 3MAF POE oil. If
additional oil is needed, use Uniqema RL32−3MAF. If this oil is
not available, use Copeland Ultra 32 CC or Mobil Arctic EAL22
CC. This oil is extremely hygroscopic, meaning it absorbs water
readily. POE oils can absorb 15 times as much water as other
oils designed to HCFC and CFC refrigerants. Take all necessary
precautions to avoid exposure of the oil to the atmosphere.
Servicing Systems on Roofs with Synthetic Materials
POE (polyolester) compressor lubricants are known to cause
long term damage to some synthetic roofing materials.
Exposure, even if immediately cleaned up, may cause
embrittlement (leading to cracking) to occur in one year or more.
When performing any service that may risk exposure of
compressor oil to the roof, take appropriate precautions to
protect roofing. Procedures which risk oil leakage include, but
are not limited to, compressor replacement, repairing refrigerant
leaks, replacing refrigerant components such as filter drier,
pressure switch, metering device, coil, accumulator, or reversing
valve.
Synthetic Roof Precautionary Procedure
1. Cover extended roof working area with an impermeable
polyethylene (plastic) drip cloth or tarp. Cover an
approximate 10x10 ft (3x3 m) area.
2. Cover area in front of the unit service panel with a terry
cloth shop towel to absorb lubricant spills and prevent
run−offs, and protect drop cloth from tears caused by tools
or components.
3. Place terry cloth shop towel inside unit immediately under
component(s) to be serviced and prevent lubricant
run−offs through the louvered openings in the unit base.
4. Perform required service.
5. Remove and dispose of any oil contaminated material per
local codes.
Liquid Line Filter Drier
The biflow filter drier is specifically designed to operate with
R−410A. Use only factory−authorized components. Filter drier
must be replaced whenever the refrigerant system is opened.
When removing a filter drier, use a tubing cutter to cut the drier
from the system. Do not unsweat a filter drier from the system.
Heat from unsweating will release moisture and contaminants
from drier into system.
R−410A Refrigerant Charging
Refer to unit information plate and charging chart. Some R−410A
refrigerant cylinders contain a dip tube to allow liquid refrigerant