Rheem 15 SEER Series User manual

15 SEER SERIES
HEAT PUMPS
11⁄2- 5 TONS FEATURING
EARTH-FRIEND Y R-410A REFRIGERANT R-410
RECOGNIZETHIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION!
!
DO NOT DESTROYTHIS MANUAL
PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE BY A SERVICEMAN
THESE INSTRUCTIONS ARE INTENDED AS AN AIDTO
QUALIFIED, LICENSED SERVICE PERSONNEL FOR
PROPER INSTALLATION, ADJUSTMENT AND OPERATION
OF THIS UNIT. READTHESE INSTRUCTIONSTHOROUGHLY
BEFORE ATTEMPTING INSTALLATION OR OPERATION.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT
IN IMPROPER INSTALLATION, ADJUSTMENT, SERVICE OR
MAINTENANCE POSSIBLY RESULTING IN FIRE, ELECTRICAL
SHOCK, PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
WARNING
!
ISO 9001:2008
92-20522-80-03
SUPERSE ES 92-20522-80-02
INSTA ATION INSTRUCTIONS

TABLE OF CONTENTS
1.0 SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 GENERA INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Checking Product Received. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 imensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Electrical and Physical ata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.0 OCATING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Corrosive Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Heat Pump Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Operational Issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 For Units With Space Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5 Customer Satisfaction Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.6 Unit Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.7 Factory-Preferred Tie- own Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.0 REFRIGERANT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.0 REP ACEMENT UNITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.0 INDOOR COI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.0 INTERCONNECTING TUBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.1 Vapor & Liquid Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.2 Maximum Length of Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.3 Vertical Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.4 Tubing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.5 Tubing Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.6 Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8.0 DEMAND DEFROST CONTRO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.1 efrost Initiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.2 efrost Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.3 Temperature Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.4 Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.5 Trouble Shooting emand efrost Operation . . . . . . . . . . . . . . . . . . . . . . . 14
8.6 High/Low Pressure Control Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.7 Enhanced Feature efrost Control iagnostic Codes. . . . . . . . . . . . . . . . . 15
9.0 EVACUATION PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10.0 START UP & PERFORMANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
11.0 CHECKING AIRF OW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12.0 CHECKING REFRIGERANT CHARGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12.1 Charging By Liquid Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12.2 Charging By Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
12.3 Final Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
13.0 E ECTRICA WIRING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
13.1 Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
13.2 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
13.3 Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
14.0 FIE D INSTA ED ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
14.1 Compressor Crankcase Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
14.2 Low Ambient Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
14.3 High Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
14.4 Heat Pump Thermostat Warning Light Kit RXPX- 01. . . . . . . . . . . . . . . . . 19
15.0 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
15.1 Single Pole Compressor Contactor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
16.0 TROUB ESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
16.1 Electrical Checks Flow Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
16.2 Cooling Mechanical Checks Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16.3 Heating Mechanical Checks Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
16.4 efrost Mechanical Checks Flow Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
16.5 Subcooling Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
16.6 General Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
16.7 Service Analyzer Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
17.0 WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
17.1 Enhanced efrost Control - PSC Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
17.2 Enhanced efrost Control - ECM Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2

1.0 SAFETY INFORMATION
!WARNING
The manufacturer’s warranty does not cover any damage or defect to the
heat pump caused by the attachment or use of any components.
Accessories or devices (other than those authorized by the manufactur-
er) into, onto or in conjunction with the heat pump. You should be aware
that the use of unauthorized components, accessories or devices may
adversely affect the operation of the heat pump and may also endanger
life and property. The manufacturer disclaims any responsibility for such
loss or injury resulting from the use of such unauthorized components,
accessories or devices.
!WARNING
Disconnect all power to unit before starting maintenance. Failure to do so
can cause electrical shock resulting in severe personal injury or death.
CAUTION
When coil is installed over a finished ceiling and/or living area, it is
recommended that a secondary sheet metal condensate pan be
constructed and installed under entire unit. Failure to do so can result
in property damage.
!WARNING
The unit must be permanently grounded. Failure to do so can cause elec-
trical shock resulting in severe personal injury or death.
CAUTION
Single-pole contactors are used on all standard single-phase units up
through 5 tons. Caution must be exercised when servicing as only one leg
of the power supply is broken with the contactor.
!WARNING
Turn off electric power at the fuse box or service panel before making any
electrical connections.
Also, the ground connection must be completed before making line volt-
age connections. Failure to do so can result in electrical shock, severe
personal injury or death.
!WARNING
These instructions are intended as an aid to qualified licensed service
personnel for proper installation, adjustment and operation of this unit.
Read these instructions thoroughly before attempting installation or oper-
ation. Failure to follow these instructions may result in improper installa-
tion, adjustment, service or maintenance possibly resulting in fire, electri-
cal shock, property damage, personal injury or death.
3

2.0 GENERAL
2.1 CHECKING PRODUCT RECEIVED
Upon receiving unit, inspect it for any shipping damage. Claims for damage, either
apparent or concealed, should be filed immediately with the shipping company.
Check heat pump model number, electrical characteristics and accessories to
determine if they are correct. Check system components (evaporator coil, condens-
ing unit, evaporator blower, etc.) to make sure they are properly matched.The infor-
mation contained in this manual has been prepared to assist in the proper installa-
tion, operation and maintenance of the heat pump system. Improper installation, or
installation not made in accordance with these instructions, can result in unsatisfac-
tory operation and/or dangerous conditions, and can cause the related warranty not
to apply.
Read this manual and any instructions packaged with separate equipment required
to make up the system prior to installation. Retain this manual for future reference.
To achieve optimum efficiency and capacity, the indoor cooling coils listed in the
heat pump specification sheet should be used.
2.2 APPLICATION
Before installing any heat pump equipment, a duct analysis of the structure and a
heat gain calculation must be made. A heat gain calculation begins by measuring all
external surfaces and openings that gain heat from the surrounding air and quanti-
fying that heat gain. A heat gain calculation also calculates the extra heat load
caused by sunlight and by humidity removal.
There are several factors that the installers must consider:
• Outdoor unit location • Proper equipment evacuation
• System refrigerant charge • Indoor unit airflow
• Indoor unit blower speed • Supply and return air duct design and sizing
• System air balancing • iffuser and return air grille location and sizing
!WARNING
The manufacturer’s warranty does not cover any damage or defect to the
heat pump caused by the attachment or use of any components.
Accessories or devices (other than those authorized by the manufactur-
er) into, onto or in conjunction with the heat pump. You should be aware
that the use of unauthorized components, accessories or devices may
adversely affect the operation of the heat pump and may also endanger
life and property. The manufacturer disclaims any responsibility for such
loss or injury resulting from the use of such unauthorized components,
accessories or devices.
MATCH A COMPONENTS:
• OUTDOOR UNIT
• INDOOR COI /METERING DEVICE
• INDOOR AIR HAND ER/FURNACE
• REFRIGERANT INES
4

Height “H” (in.) [mm]
DIMENSIONA DATA
ength “ ” (in.) [mm]
Width “W” (in.) [mm]
BASE PAN (BOTTOM VIEW)
O NOT OBSTRUCT RAIN HOLES
(SHA E ).
15 SEER 18, 24
30 36, 42, 48, 60
261/4 [666.7]
275/8 [701.6]
275/8 [701.6]
273/8 [695.3] 353/8 [898.5]
315/8 [803.2] 315/8 [803.2]
315/8 [803.2] 315/8 [803.2]
FIGURE 1
DIMENSIONS
2.3 DIMENSIONS (SEE FIGURE 1)
AIR DISCHARGE: ALLOW
60” [1524 mm] MINIMUM
CLEARANCE.
L
H
SEE DETAIL A
w
A-00008
SERVICE ACCESS
ALLOW 24” [609.6 mm]
CLEARANCE
AIR IN ETS
(LOUVERE PAN-
ELS) ALLOW 6”
[152.4 mm]
MINIMUM
CLEARANCE
2"
[50.8 mm]
BASERAIL*
NOTE: GRILLE APPEARANCE
MAY VARY.
*The 3, 31⁄2, 4 & 5 ton
models do not feature
a baserail.
5
*NOTE: “H” IMENSION INCLU ES
BASERAILS AN /OR BASEPAN.
*

3.0 LOCATING UNIT
3.1 CORROSIVE ENVIRONMENT
The metal parts of this unit may be subject to rust or deterioration if exposed to a
corrosive environment. This oxidation could shorten the equipment’s useful life.
Corrosive elements include, but are not limited to, salt spray, fog or mist in seacoast
areas, sulphur or chlorine from lawn watering systems, and various chemical conta-
minants from industries such as paper mills and petroleum refineries.
If the unit is to be installed in an area where contaminants are likely to be a prob-
lem, special attention should be given to the equipment location and exposure.
• Avoid having lawn sprinkler heads spray directly on the unit cabinet.
• In coastal areas, locate the unit on the side of the building away from the water-
front.
• Shielding provided by a fence or shrubs may give some protection, but cannot
violate minimum airflow and service access clearances.
• Elevating the unit off its slab or base enough to allow air circulation will help
avoid holding water against the basepan.
Regular maintenance will reduce the build-up of contaminants and help to protect
the unit’s finish.
NOTES:
➀ 20 Fins per inch [mm]
➁Factory charged for 15 ft. [4.6 m] of line set
2.4 ELECTRICAL & PHYSICAL DATA (SEE TABLE 1)
Model
Number Phase
Frequency (Hz)
Voltage (Volts)
Rated Load
Amperes
(RLA)
Locked Rotor
Amperes
(LRA)
Fan Motor
Full Load
Amperes
(FLA)
Minimum
Circuit
Ampacity
Amperes Minimum
Amperes Maximum Amperes
Face Area
Sq. Ft.
[m2]
No.
Rows CFM [L/s]
Refrig.
Per
Circuit
Oz. [g]
Net
Lbs. [kg] Shipping Lbs. [kg]
Fuse or HACR
Circuit Breaker Outdoor Coil WeightCompressor
ELECTRICAL DATA PHYSICAL DATA
18 1-60-208/230 9/9 48 0.8 13/13 15/15 20/20 13.72 [1.27] 1 2590 [1222] 95.6 [2710] 154 [69.9] 164 [74.4]
24 1-60-208/230 13.5/13.5 58.3 0.8 18/18 25/25 30/30 13.72 [1.27] 1 2590 [1222] 94.2 [2671] 155 [70.3] 165 [74.8]
30 1-60-208/230 12.8/12.8 64 1 18/18 25/25 25/25 16.39 [1.52] 1 2595 [1225] 114.5 [3246] 169 [76.7] 181 [82.1]
36 1-60-208/230 16.7/16.7 79 1.4 23/23 30/30 35/35 21.85 [2.03] 1 3000 [1416] 138 [3912] 193 [87.5] 207 [93.9]
42 1-60-208/230 17.9/17.9 112 1.9 25/25 30/30 40/40 21.85 [2.03] 1 3575 [1687] 146.5 [4153] 210 [95.3] 224 [101.6]
48 1-60-208/230 19.9/19.9 109 1 26/26 35/35 45/45 21.85 [2.03] 1 3575 [1687] 229.2 [6498] 210 [95.3] 224 [101.6]
60 1-60-208/230 21.4/21.4 135 2.8 30/30 35/35 50/50 21.85 [2.03] 2 3925 [1852] 279 [7910] 264 [119.8] 278 [126.1]
Rev. 2/3/2010
6
TAB E 1
E ECTRICA AND PHYSICA DATA – 13 SEER

• Frequent washing of the cabinet, fan blade and coil with fresh water will remove
most of the salt or other contaminants that build up on the unit.
• Regular cleaning and waxing of the cabinet with an automobile polish will pro-
vide some protection.
• A liquid cleaner may be used several times a year to remove matter that will not
wash off with water.
Several different types of protective coil coatings are offered in some areas. These
coatings may provide some benefit, but the effectiveness of such coating materials
cannot be verified by the equipment manufacturer.
3.2 HEAT PUMP LOCATION
Consult local and national building codes and ordinances for special installation
requirements. Following location information will provide longer life and simplified
servicing of the outdoor heat pump.
NOTE: These units must be installed outdoors. No ductwork can be attached, or
other modifications made, to the discharge grille. Modifications will affect perfor-
mance or operation.
3.3 OPERATIONAL ISSUES
•IMPORTANT: Locate the unit in a manner that will not prevent, impair or com-
promise the performance of other equipment horizontally installed in proximity
to the unit. Maintain all required minimum distances to gas and electric meters,
dryer vents, exhaust and inlet openings. In the absence of National Codes, or
manufacturers’ recommendations, local code recommendations and require-
ments will take presidence.
• Refrigerant piping and wiring should be properly sized and kept as short as
possible to avoid capacity losses and increased operating costs.
• Locate the unit where water run off will not create a problem with the equip-
ment. Position the unit away from the drip edge of the roof whenever possible.
Units are weatherized, but can be affected by the following:
o Water pouring into the unit from the junction of rooflines, without protective
guttering. Large volumes of water entering the heat pump while in operation
can impact fan blade or motor life, and coil damage may occur to a heat
pump if moisture cannot drain from the unit under freezing conditions.
o Freezing moisture, or sleeting conditions, can cause the cabinet to ice-over
prematurely and prevent heat pump operation, requiring backup heat, which
generally results in less economical operation.
• Closely follow clearance recommendations (See Figure 1).
o 24” [609.6 mm] to the service panel access
o 60” [1524 mm] above heat pump fan discharge (unit top) to prevent recircula-
tion
o 6” [152.4 mm] to heat pump coil grille air inlets (per heat pump).
IMPORTANT: Remove attached shipping strap. Failure to remove strap could result
in internal tubing stress. Plastic strap can be cut off from the exterior of the unit and
left inside of the unit. See page 31.
3.4 FOR UNITS WITH SPACE LIMITATIONS
In the event that a space limitation exists, we will permit the following clearances:
Single Unit Applications: Clearances below 6 inches [152.4 mm] will reduce unit
capacity and efficiency. o not reduce the 60-inch [1524 mm] discharge, or the 24-
inch [609.6 mm] service clearances.
Multiple Unit Applications: When multiple heat pump grille sides are aligned, a 6-
inch [152.4 mm] per unit clearance is recommended, for a total of 12" [304.8 mm]
between two units. Two combined clearances below 12 inches [304.8 mm] will
reduce capacity and efficiency. o not reduce the 60-inch [1524 mm] discharge, or
24-inch [609.6 mm] service, clearances.
!WARNING
Disconnect all power to unit before starting maintenance. Failure to do so
can cause electrical shock resulting in severe personal injury or death.
7

8
• o not obstruct the bottom drain opening in the heat pump base pan. It is
essential to provide defrost condensate drainage to prevent possible refreezing
of the condensation. Provide a base pad for mounting the unit, which is slightly
pitched away from the structure. Route condensate off the base pad to an area
which will not become slippery and result in personal injury.
• Where snowfall is anticipated, the heat pump must be elevated above the base
pad to prevent ice buildup that may crush the tubing of the heat pump coil or
cause fin damage. Heat pump units should be mounted above the average
expected accumulated snowfall for the area.
3.5 CUSTOMER SATISFACTION ISSUES
• The heat pump should be located away from the living, sleeping and recre-
ational spaces of the owner and those spaces on adjoining property.
• To prevent noise transmission, the mounting pad for the outdoor unit should
not be connected to the structure, and should be located sufficient distance
above grade to prevent ground water from entering the unit.
3.6 UNIT MOUNTING
If elevating the heat pump, either on a flat roof or on a slab, observe the
following guidelines.
• The base pan provided elevates the heat pump 2” [50.8 mm] above the base
pad.
• If elevating a unit on a flat roof, use 4” x 4” [101.6 mm x 101.6 mm] (or equiva-
lent) stringers positioned to distribute unit weight evenly and prevent noise and
vibration (see Figure 2).
NOTE: o not block drain openings shown in Figure 1.
• If unit must be elevated because of anticipated snow fall, secure unit and ele-
vating stand such that unit and/or stand will not tip over or fall off. Keep in mind
that someone may try to climb on unit.
3.7 FACTORY-PREFERRED TIE-DOWN METHOD FOR OUTDOOR UNITS
IMPORTANT: The Manufacturer’s approved/recommended method is a guide to securing
equipment for wind and seismic loads. Other methods might provide the same result, but
the Manufacturer’s method is the only one endorsed by the Manufacturer for securing
equipment where wind or earthquake damage can occur. Additional information is avail-
able in the PTS (Product Technical Support) section of the Manufacturer’s website
Rheemote.net and can be found as a listing under each outdoor model. If you do not
have access to this site, your istributor can offer assistance.
FIGURE 2
RECOMMENDED E EVATED INSTA ATION

9
4.0 REFRIGERANT CONNECTIONS
All units are factory charged with Refrigerant 410A for 15 ft. [4.6 m] of line set. All
models are supplied with service valves. Keep tube ends sealed until connection is
to be made to prevent system contamination.
5.0 REPLACEMENT UNITS
To prevent failure of a new heat pump unit, the existing tubing system must be cor-
rectly sized and cleaned or replaced. Care must be exercised that the expansion
device is not plugged. For new and replacement units, a liquid line filter drier should
be installed and refrigerant tubing should be properly sized. Test the oil for acid. If
positive, a liquid line filter drier is mandatory.
6.0 INDOOR COIL
REFER TO IN OOR COIL MANUFACTURER’S INSTALLATION INSTRUCTIONS.
IMPORTANT: The manufacturer is not responsible for the performance and opera-
tion of a mismatched system, or for a match listed with another manufacturer’s coil.
6.1 LOCATION
o not install the indoor coil in the return duct system of a gas or oil furnace.
Provide a service inlet to the coil for inspection and cleaning. Keep the coil pitched
toward the drain connection.
CAUTION
When coil is installed over a finished ceiling and/or living area, it is
recommended that a secondary sheet metal condensate pan be
constructed and installed under entire unit. Failure to do so can result
in property damage.

10
7.0 INTERCONNECTING TUBING
7.1 VAPOR AND LIQUID LINES
Keep all lines sealed until connection is made.
Make connections at the indoor coil first.
Refer to Line Size Information in Tables 2 and 3 for correct size and multipliers to be
used to determine capacity for various vapor line diameters and lengths of run. The
losses due to the lines being exposed to outdoor conditions are not included.
The factory refrigeration charge in the outdoor unit is sufficient for 15 feet [4.6 m] of
interconnecting lines. The factory refrigeration charge in the outdoor unit is sufficient
for the unit and 15 feet [4.6 m] of standard size interconnecting liquid and vapor
lines. For different lengths, adjust the charge as indicated below.
1/4” ± .3 oz. per foot [6.35 mm ± 8.5 g]
5/16” ± .4 oz. per foot [7.9 mm ± 11.3 g]
3/8” ± .6 oz. per foot [9.5 mm ± 17 g]
1/2” ± 1.2 oz. per foot [12.7 mm ± 34 g]
7.2 MAXIMUM LENGTH OF LINES
The maximum length of interconnecting line is 150 feet [45.7 m]. Always use the
shortest length possible with a minimum number of bends. Additional compressor
oil is not required for any length up to 150 feet [45.7 m].
NOTE: Excessively long refrigerant lines cause loss of equipment capacity.
7.3 VERTICAL SEPARATION
Keep the vertical separation to a minimum. Use the following guidelines when
installing the unit:
1. O NOT exceed the vertical separations as indicated on Table 3.
2. It is recommended to use the smallest liquid line size permitted to minimize sys-
tem charge which will maximize compressor reliability.
3. Table 3 may be used for sizing horizontal runs.
7.4 TUBING INSTALLATION
Observe the following when installing correctly sized type “L” refrigerant tubing
between the condensing unit and evaporator coil:
• If a portion of the liquid line passes through a hot area where liquid refrigerant
can be heated to form vapor, insulating the liquid line is required.
• Use clean, dehydrated, sealed refrigeration grade tubing.
• Always keep tubing sealed until tubing is in place and connections are to be
made.
• Blow out the liquid and vapor lines with dry nitrogen before connecting to the
outdoor unit and indoor coil. Any debris in the line set will end up plugging the
expansion device.
• As an added precaution it is recommended that a high quality, bi-directional fil-
ter drier is installed in the liquid line.
• o not allow the vapor line and liquid line to be in contact with each other. This
causes an undesirable heat transfer resulting in capacity loss and increased
power consumption. The vapor line must be insulated.
• If tubing has been cut, make sure ends are deburred while holding in a position
to prevent chips from falling into tubing. Burrs such as those caused by tubing
cutters can affect performance dramatically, particularly on small liquid line
sizes.
• For best operation, keep tubing run as short as possible with a minimum num-
ber of elbows or bends.
• Locations where the tubing will be exposed to mechanical damage should be
avoided. If it is necessary to use such locations, the copper tubing should be
housed to prevent damage.

11
• If tubing is to be run underground, it must be run in a sealed watertight chase.
• Use care in routing tubing and do not kink or twist. Use a tubing bender on the
vapor line to prevent kinking.
• Route the tubing using temporary hangers, then straighten the tubing and
install permanent hangers. Line must be adequately supported.
• The vapor line must be insulated to prevent dripping (sweating) and prevent
performance losses. Armaflex and Rubatex are satisfactory insulations for this
purpose. Use 1/2” [12.7 mm] minimum insulation thickness, additional insula-
tion may be required for long runs.
• Check Table 2 for the correct vapor line size. Check Table 3 for the correct liq-
uid line size.
7.5 TUBING CONNECTIONS
Indoor coils have only a holding charge of dry nitrogen. Keep all tube ends sealed
until connections are to be made.
• Use type “L” copper refrigeration tubing. Braze the connections with accepted
industry practices.
• Be certain both refrigerant shutoff valves at the outdoor unit are closed.
• Clean the inside of the fittings before brazing.
• Remove the cap and schrader core from service port to protect seals from heat
damage.
• Use an appropriate heatsink material around the copper stub and the service
valves before applying heat.
•IMPORTANT: o not braze any fitting with the TEV sensing bulb attached.
• Braze the tubing between the outdoor unit and indoor coil. Flow dry nitrogen
into a service port and through the tubing while brazing.
• The service valves are not backseating valves. To open the valves, remove the
valve cap with an adjustable wrench. Insert a 3/16” [4.7 mm] or 5/16” [7.9 mm] hex
wrench into the stem. Back out counterclockwise.
• Replace the valve cap finger tight then tighten an additional 1/2 hex flat for a
metal-to-metal seal.
7.6 LEAK TESTING
• Pressurize line set and coil through service fittings with dry nitrogen to 150
PSIG [1034.2 kPa] maximum. Leak test all joints using liquid detergent. If a
leak is found, relieve pressure and repair.

12
TAB E 2
SUCTION INE ENGTH/SIZE VS CAPACITY MU TIP IER (R-410A)
NOTES:
*Standard line size
Using suction line larger than shown in chart will result in poor oil return and is not recommended.
5/8 [15.9] Opt.
3/4* [19] Std.
—
5/8 [15.9] Opt.
3/4* [19] Std.
—
5/8 [15.9] Opt.
3/4* [19] Std.
7/8 [22.2] Opt.
5/8 [15.9] Opt.
3/4* [19] Std.
7/8 [22.2] Opt.
3/4 [19] Opt.
7/8* [22.2] Opt.
—
7/8 [22.2]* Std.
1 1/8 Opt.
—
7/8 [22.2]* Std.
1 1/8 [28.6] Opt.
—
Unit Size
Sucti n Line C nnecti n Size
Sucti n Line Run - Feet [m]
3/4”
[19] I.D.
3/4”
[19] I.D.
3/4”
[19] I.D.
3/4”
[19] I.D.
7/8”
[22.2] I.D.
7/8”
[22.2] I.D.
7/8”
[22.2] I.D.
1 1/2 T n 2 T n 2 1/2 T n 3 T n 3 1/2 T n 4 T n 5 T n
Op ional
25’ [7.6] S andard
— Op ional
Op ional
50’ [15.24] S andard
— Op ional
Op ional
100’ [30.5] S andard
— Op ional
Op ional
150’ [45.7] S andard
— Op ional
1.00 1.00 1.00 1.00 1.00 1.00 1.00
1.00 1.00 1.00 1.00 1.00 1.00 1.00
——1.00 —— ——
0.98 0.98 0.96 0.98 0.99 0.99 0.99
0.99 0.99 0.98 0.99 0.99 0.99 0.99
——0.99 —— ——
0.95 0.95 0.94 0.96 0.96 0.96 0.97
0.96 0.96 0.96 0.97 0.98 0.98 0.98
——0.97 —— ——
0.92 0.92 0.91 0.94 0.94 0.95 0.94
0.93 0.94 0.93 0.95 0.96 0.96 0.97
——0.95 —— ——

13
TAB E 3
IQUID INE SIZING (R-410A)
NOTES
*S andard line size
N/A - Applica ion no recommended.
iquid ine Size
Outdoor unit above or below indoor coil
(Heat Pump Only)
Total Equivalent ength - Feet [m]
Maximum Vertical Separation - Feet [m]
25 50 75 100 125 150
System
Capacity
1 1/2 Ton
2 Ton
2 1/2 Ton
3 Ton
3 1/2 Ton
4 Ton
5 Ton
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
1/4 [6.4] 25 [7.6] 40 [12.2] 25 [7.6] 9 [2.7] N/A N/A
5/16 [7.9] 25 [7.6] 50 [15.2] 62 [18.9] 58 [17.7] 53 [16.2] 49 [14.9]
3/8* [9.5] 25 [7.6] 50 [15.2] 75 [22.9] 72 [21.9] 70 [21.3] 68 [20.7]
1/4 [6.4] 23 [7.0] N/A N/A N/A N/A N/A
5/16 [7.9] 25 [7.6] 36 [10.9] 29 [8.8] 23 [7.0] 16 [4.9] 9 [2.7]
3/8* [9.5] 25 [7.6] 50 [15.2] 72 [21.9] 70 [21.3] 68 [20.7] 65 [19.8]
1/4 [6.4] 25 [7.6] N/A N/A N/A N/A N/A
5/16 [7.9] 25 [7.6] 49 [14.9] 38 [11.6] 27 [8.3] 17 [5.2] 6 [1.8]
3/8* [9.5] 25 [7.6] 50 [15.2] 68 [20.7] 65 [19.8] 62 [18.9] 58 [17.7]
5/16 [7.9] 25 [7.6] 50 [15.2] 37 [11.3] 22 [6.7] 7 [2.1] N/A
3/8* [9.5] 25 [7.6] 50 [15.2] 68 [20.7] 63 [19.2] 58 [17.7] 53 [16.2]
5/16 [7.9] 25 [7.6] 23 [7.0] 4 [1.2] N/A N/A N/A
3/8* [9.5] 25 [7.6] 50 [15.2] 43 [13.1] 36 [10.9] 30 [9.144] 24 [7.3]
3/8* [9.5] 25 [7.6] 46 [14.0] 38 [11.6] 30 [9.144] 22 [6.7] 15 [4.5]
1/2 [12.7] 25 [7.6] 50 [15.2] 56 [17.1] 55 [16.8] 53 [16.2] 52 [15.8]
3/8* [9.5] 25 [7.6] 50 [15.2] 56 [17.1] 44 [13.4] 32 [9.8] 20 [6.1]
1/2 [12.7] 25 [7.6] 50 [15.2] 75 [22.9] 81 [24.7] 79 [24.1] 76 [23.2]
ine Size
Connection Size
(Inch I.D.) [mm]
ine Size
(Inch OD)
[mm]

14
8.0 DEMAND DEFROST CONTROL AND
8.0 HIGH/LOW PRESSURE CONTROLS
The demand defrost control is a printed circuit board assembly consisting of solid
state control devices with electro-mechanical outputs. The demand defrost control
monitors the outdoor ambient temperature, outdoor coil temperature, and the com-
pressor run-time to determine when a defrost cycle is required.
Enhanced Feature Demand Defrost Control: Has high and low pressure control
inputs with unique pressure switch logic built into the microprocessor to provide
compressor and system protection without nuisance lock-outs. Cycles the compres-
sor off for 5 seconds at the beginning and end of the defrost cycle to eliminate the
increased compressor noise caused by rapidly changiing system pressures when
the reversing valve switches. See section 8.7 for diagnostic flash codes for the two
diagnostic LE ’s provided on the control.
8.1 DEFROST INITIATION
A defrost will be initiated when the three conditions below are satisfied:
1) The outdoor coil temperature is below 35°F.
2) The compressor has operated for at least 34 minutes with the outdoor coil tem-
perature below 35°F.
3) The measured difference between the ambient temperature and the outdoor
coil temperature exceeds a certain threshold.
Additionally, a defrost will be initiated if six hours of accumulated compressor run-time
has elapsed without a defrost with the outdoor coil temperature below 35°F.
8.2 DEFROST TERMINATION
Once a defrost is initiated, the defrost will continue until fourteen minutes has
elapsed or the coil temperature has reached the terminate temperature. The termi-
nate temperature is factory set at 70°F, although the temperature can be changed
to 50°F, 60°F, 70°F or 80°F by relocating a jumper on the board.
8.3 TEMPERATURE SENSORS
The coil sensor is clipped to the top tube on the outdoor coil at the point feed by the
distribution tubes from the expansion device (short 3/8” dia. tube). The air sensor is
located on the defrost control board.
If the ambient sensor fails the defrost control will initiate a defrost every 34 minutes
with the coil temperature below 35°F.
If the coil sensor fails the defrost control will not initiate a defrost.
8.4 TEST MODE
The test mode is initiated by shorting the TEST pins. In this mode of operation, the
enable temperature is ignored and all timers are sped up by a factor of 240. To initi-
ate a manual defrost, short the TEST pins. Remove the short when the system
switches to defrost mode. The defrost will terminate on time (14 minutes) or when
the termination temperature has been achieved. Short TEST pins again to termi-
nate the defrost immediately.
8.5 TROUBLE SHOOTING DEMAND DEFROST OPERATION
Set the indoor thermostat select switch to heat and thermostat lever to a call for
heat.
Jumper the “test pins” to put the unit into defrost. If the unit goes into defrost and
comes back out of defrost, the indication is that the control is working properly.
If the unit did not go into defrost using the test pins, check to ensure that 24V is
being supplied to the control board. If 24V is present then replace the control.

15
8.6 HIGH/LOW PRESSURE CONTROL MONITORING
Status of high and low pressure controls is monitored by the enhanced feature
demand defrost control and the following actions are taken.
High Pressure Control (optional) – Provides active protection in both cooling and
heating modes at all outdoor ambient temperatures. The high pressure control is an
automatic reset type and opens at approximately 610 psig and closes at approxi-
mately 420 psig. The compressor and fan motor will stop when the high pressure
control opens and will start again if the high side pressure drops to approximately
420 psig when the automatic reset high pressure control resets. If the high pressure
control opens 3 times within a particular call for heating or cooling operation, the
defrost control will lock out compressor and outdoor fan operation.
ow Pressure Control (standard) – Provides active protection in both heating and
cooling modes at all outdoor ambient temperatures. The low pressure control is an
automatic reset type and opens at approximately 15 psig and closes at approxi-
mately 40 psig. Operation is slightly different between cooling and heating modes.
Cooling Mode: The compressor and fan motor will stop when the low pressure
control opens and will start again when the low side pressure rises to approxi-
mately 40 psig when the low pressure control automatically resets. If the low
pressure switch opens 3 times within a particular call for cooling operation, the
defrost control will lock out compressor and outdoor fan operation.
Heating Mode: The compressor and fan motor will stop when the low pressure
control opens and will start again when the low side pressure rises to approxi-
mately 40 psig when the low pressure control automatically resets. If the low
pressure switch trips 3 times within 120 minutes of operation during a particular
call for heating operation, the defrost control will lock out compressor and out-
door fan operation. If the lock-out due to low pressure occurs at an outdoor
ambient temperature below 5°F, the defrost control will automatically exit the
lock-out mode when the outdoor ambient temperature rises to 5°F. This feature
is necessary since the low pressure control could possibly heave opened due to
the outdoor ambient being very low rather than an actual system fault.
Exiting ock-Out Mode: To exit the lock-out mode, remove 24 volts to the defrost
control by removing power to indoor air-handler/furnace or by shorting the two
defrost control test pins together.
8.7 ENHANCED FEATURE DEFROST CONTROL DIAGNOSTIC CODES
9.0 EVACUATION PROCEDURE
The life and efficiency of the equipment is dependent upon the thoroughness exer-
cised by the technician when evacuating air and moisture from the system.
Air in the system causes high condensing temperatures and pressure, resulting in
increased power input and non-verifiable performance.
Moisture chemically reacts with the refrigerant and oil to form corrosive hydrofluoric
and hydrochloric acids. These attack motor windings and parts, causing breakdown.
After the system has been leak checked and proven sealed, connect the vacuum
pump and evacuate system to 500 microns. The vacuum pump must be connected
to both the high and low sides of the system through adequate connections. Use
the largest size connections available since restrictive service connections may lead
to false readings because of pressure drop through the fittings.
IMPORTANT: Compressors (especially scroll type) should never be used to evacu-
ate the heat pump system because internal electrical arcing may result in a dam-
aged or failed compressor.
ED 1 ED 2 Control Board Status
OFF OFF No Power
ON ON Coil Sensor Failure
OFF ON Ambient Sensor Failure
FLASH FLASH Normal
OFF FLASH Low Pressure Lockout (short test pins to reset)
FLASH OFF High Pressure Lockout (short test pins to reset)
ON FLASH Low Pressure Control Open
FLASH ON High Pressure Control Open
Alternate Flashing 5 Minute Time elay

16
10.0 START UP AND PERFORMANCE
Even though the unit is factory charged with Refrigerant-410A, the charge must be
checked to the charge table attached to the service panel and adjusted, if required.
(See Table 1). Allow a minimum of 5 minutes running. Before analyzing charge, see
the instructions on the unit service panel rating plate for marking the total charge.
11.0 CHECKING AIRFLOW
The air distribution system has the greatest effect on airflow. The duct system is
totally controlled by the contractor. For this reason, the contractor should use only
industry-recognized procedures.
Heat pump systems require a specified airflow. Each ton of cooling requires
between 350 and 450 cubic feet [165.2 and 212.4 L/s] of air per minute (CFM) [L/s],
or 400 CFM [188.8 L/s] nominally.
uct design and construction should be carefully done. System performance can be
lowered dramatically through bad planning or workmanship.
Air supply diffusers must be selected and located carefully. They must be sized and
positioned to deliver treated air along the perimeter of the space. If they are too
small for their intended airflow, they become noisy. If they are not located properly,
they cause drafts. Return air grilles must be properly sized to carry air back to the
blower. If they are too small, they also cause noise.
The installers should balance the air distribution system to ensure proper quiet air-
flow to all rooms in the home. This ensures a comfortable living space.
An air velocity meter or airflow hood can give a reading of the system CFM [L/s].
12.0 CHECKING REFRIGERANT CHARGE
Charge for all systems should be checked against the Charging Chart inside the
access panel cover.
IMPORTANT: o not operate the compressor without charge in system.
Addition of R-410A will raise pressures (vapor, liquid and discharge).
If adding R-410A raises both vapor pressure and temperature, the unit is over-
charged.
IMPORTANT: Use industry-approved charging methods to ensure proper system
charge.
12.1 CHARGING BY LIQUID PRESSURE
The liquid pressure method is used for charging systems in the cooling and heating
mode. The service port on the liquid (small valve) and suction (large valve) is used
for this purpose.
Verify that the outdoor unit is running and the indoor air mover is delivering the
maximum airflow for this system size. Read and record the outdoor ambient tem-
perature. Read and record the liquid and suction pressures at the ports on the liquid
and suction valves.
If refrigerant lines are sized using the nameplate charge, the correct liquid pressure
is found at the intersection of the suction pressure and the outdoor ambient.
1. Remove refrigerant charge if the liquid pressure is above the chart value.
2. Add refrigerant charge if the liquid pressure is below the chart value.

17
12.2 CHARGING BY WEIGHT
For a new installation, evacuation of interconnecting tubing and indoor coil is ade-
quate; otherwise, evacuate the entire system. Use the factory charge shown in
Table 1 of these instructions or unit data plate. Note that charge value includes
charge required for 15 ft. [4.6 m] of standard size interconnecting liquid line.
Calculate actual charge required with installed liquid line size and length using:
1/4” [6.35 mm] O. . = .3 oz./ft. [8.5 g/m]
5/16” [7.9 mm] O. . = .4 oz./ft. [11.3 g/m]
3/8” [9.5 mm] O. . = .6 oz./ft. [17 g/m]
1/2” [12.7 mm] O. . = 1.2 oz./ft. [34 g/m]
With an accurate scale (+/– 1 oz.) or volumetric charging device, adjust charge dif-
ference between that shown on the unit data plate and that calculated for the new
system installation. If the entire system has been evacuated, add the total calculat-
ed charge.
12.3 FINAL LEAK TESTING
After the unit has been properly evacuated and charged, a halogen leak detector
should be used to detect leaks in the system. All piping within the condensing unit,
evaporator, and interconnecting tubing should be checked for leaks. If a leak is
detected, the refrigerant should be recovered before repairing the leak. The Clean
Air Act prohibits releasing refrigerant into the atmosphere.
13.0 ELECTRICAL WIRING
NOTE: Check all wiring to be sure connections are securely fastened, electrically
isolated from each other and that the unit is properly grounded.
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and
any applicable local code.
13.1 POWER WIRING
It is important that proper electrical power from a commercial utility is available at
the heat pump contactor. Voltage ranges for operation are shown in Table 4.
Install a branch circuit disconnect within sight of the unit and of adequate size to
handle the starting current (see Table 1).
Power wiring must be run in a rain-tight conduit. Conduit must be run through the
connector panel below the access cover (see Figure 1) and attached to the bottom
of the control box.
Connect power wiring to contactor located in outdoor heat pump electrical box. (See
wiring diagram attached to unit access panel.)
Check all electrical connections, including factory wiring within the unit and make
sure all connections are tight.
O NOT connect aluminum field wire to the contactor terminals.
13.2 GROUNDING
A grounding lug is provided near the contactor for a ground wire.
!WARNING
The unit must be permanently grounded. Failure to do so can cause elec-
trical shock resulting in severe personal injury or death.
!WARNING
Turn off electric power at the fuse box or service panel before making any
electrical connections.
Also, the ground connection must be completed before making line volt-
age connections. Failure to do so can result in electrical shock, severe
personal injury or death.

18
13.3 CONTROL WIRING
(See Figure 5)
If the low voltage control wiring is run in conduit with the power supply, Class I insu-
lation is required. Class II insulation is required if run separate. Low voltage wiring
may be run through the insulated bushing provided in the 7/8” [22.2 mm] hole in the
base panel, up to and attached to the pigtails from the bottom of the control box.
Conduit can be run to the base panel if desired by removing the insulated bushing.
A thermostat and a 24 volt, 40 VA minimum transformer are required for the control
circuit of the condensing unit. The furnace or the air handler transformer may be
used if sufficient. See the wiring diagram for reference.
FIGURE 5
CONTRO WIRING FOR AIR HAND ER
NOTES:
1. Jumper “E” to “W2” to
transfer control of
supplemental heat to
1st stage when the
emergency heat switch
is on.
2. This wire turns on heat
for defrost, omit for most
economical operation.
3. Wire with colored tracing
stripe.
B
W2
G
Y
W1
B
ODD
C
R
Air Handler
Y
G
W2
E
Heat Pump Thermostat
Heat Pump
Outdoor Unit
Y
B
CR
R
D
C
Y
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
W/BL
G/BK
Y
W/BK
G/Y
BR
BL
R
NOTE:REDWIREREQUIREDWITHRANCODDLDEMANDDEFROSTCONTROL.
TYPICA THERMOSTAT:
HEAT PUMP WITH
E ECTRIC HEAT
TAB E 4
VO TAGE RANGES (60 HZ)
Operating Voltage Range at Copeland
Nameplate Voltage Maximum Load esign Conditions for
Compressors
208/230 (1 Phase) 187 - 253

19
14.0 FIELD INSTALLED ACCESSORIES
14.1 COMPRESSOR CRANKCASE HEATER (CCH)
While scroll compressors usually do not require crankcase heaters, there are
instances when a heater should be added. Refrigerant migration during the off cycle
can result in a noisy start up. Add a crankcase heater to minimize refrigeration
migration, and to help eliminate any start up noise or bearing “wash out.”
NOTE: The installation of a crankcase heater is recommended if the system charge
exceeds the values in Table 5.
All heaters are located on the lower half of the compressor shell. Its purpose is to
drive refrigerant from the compressor shell during long off cycles, thus preventing
damage to the compressor during start-up.
At initial start-up or after extended shutdown periods, make sure the heater is ener-
gized for at least 12 hours before the compressor is started. ( isconnect switch on
and wall thermostat off.)
14.2 LOW AMBIENT CONTROL (LAC) – COOLING MODE ONLY - RXAD-A08
This component senses compressor head pressure and shuts the heat pump fan off
when the head pressure drops to approximately 220 PSIG [1516.8 kPa]. This
allows the unit to build a sufficient head pressure at lower ambient in order to main-
tain system balance and obtain improved capacity. Low ambient control should be
used on all equipment operated below 70°F [21.1°C] ambient.
14.3 HIGH PRESSURE CONTROL (HPC)
This control keeps the compressor from operating in pressure ranges which can
cause damage to the compressor. This control is in the low voltage control circuit.
High pressure control (HPC) is a manual reset which opens near 610 PSIG [4205.8
kPa]. o not reset arbitrarily without first determining what caused it to trip.
14.4 HEAT PUMP THERMOSTAT WARNING LIGHT KIT RXPX-D01
This component senses a compressor lock out and tells the thermostat service light
to come on. This will let the homeowner know that service is needed on the system.
NOTE: Warning light on thermostat will come on during a 5 minute compressor time
delay and for 5 seconds during defrost while the compressor is off. Homeowner
should only be concerned if light stays on for more than 5 minutes.
15.0 SERVICE
15.1 SINGLE-POLE COMPRESSOR CONTACTOR (CC)
CAUTION
Single-pole contactors are used on all standard single-phase units up
through 5 tons. Caution must be exercised when servicing as only one leg
of the power supply is broken with the contactor.
TAB E 5
MAXIMUM SYSTEM CHARGE VA UES 15 SEER
15 SEER Compressor Charge imit
Model Model Without Crankcase
Size Number Heat (1 Phase)
18 ZP16K5E 9.6 lbs. [66.2 kPa]
24 ZP20K5E 9.6 lbs. [66.2 kPa]
30 ZP24K5E 9.6 lbs. [66.2 kPa]
36 ZP31K5E 9.6 lbs. [66.2 kPa]
42 ZP34K5E 12 lbs. [82.7 kPa]
NOTE: Model sizes 48 and 60 have a factory installed crankcase heater.

20
16.0 TROUBLE SHOOTING
In diagnosing common faults in the heat pump system, develop a logical thought
pattern as used by experienced technicians. The charts which follow are not intend-
ed to be an answer to all problems but only to guide the technician’s thinking.
Through a series of yes and no answers, follow the logical path to a likely conclu-
sion.
A novice technician should use these charts like a road map. Remember that the
chart should clarify a logical path to the problem’s solution.
16.1 ELECTRICAL CHECKS FLOW CHART
Unit Running?
NO YES
Thermostat Problem? Go to
Mechanical Checks
YES NO for Cooling or Heating
Repair and Recheck
Transformer Problem?
YES NO
Repair and Recheck
Voltage on Compressor
Side of Contactor?
YES NO
Run Capacitor Voltage on Line
Side of Contactor?
Start Capacitor
NO YES
Potential Relay
Circuit Breakers Compressor Contactor
Compressor Internal or Fuses Open
Overload Open Hi Pressure Cut-Out
YES
Compressor Winding Open Hot Gas Sensor
Compressor Winding
Unit Wiring and Grounded Compressor Time- elay
Connections
Outdoor Fan Motor Unit Wiring and
Grounded Connections
Grounded Capacitor
Replace Fuses
or Reset Breakers
and Recheck System