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H
P
- H
C
EAT
UMP
EATING
The proper method of charging a heat pump in the heat mode is by
weighing the charge according to the total charge listed on the
rating plate.
ELECTRICAL ADJUSTMENTS
This series of electric cooling and, heat pump package equipment
is designed to accept a field installed electric heat kit. The unit is
equipped to easily install the HKR Series Electric Heat Kit. Full
Installation Instructions are included in this kit. Please use this
document for guidance in field equipping the package unit with
electric heat.
Choose the heat kit that fits the application for the specific installa-
tion. Permanently mark the unit's nameplate with the model being
installed. High and low voltage connections are detailed in the
heat kit instructions.
Indoor Blower motor speed tap selection may need to be modified
to accommodate normal continuous operation to prevent a nui-
sance trip. See table below.
Model
5
GPH1524M41
3
GPH1530M41
3
GPH1536M41
3
GPH1542M41
3
GPH1548M41
3
GPH1560M41
3
All models are factory shipped at T3 speed
MAINTENANCE
HIGH VOLTAGE
!
D
ALL
ISCONNECT
POWER BEFORE SERVICING OR INSTALLING
M
THIS UNIT.
ULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
The Self Contained Package Air Conditioner and Heat Pump should
operate for many years without excessive service calls if the unit is
installed properly. However it is recommended that the homeowner
inspect the unit before a seasonal start up. The coils should be
free of debris so adequate airflow is achieved. The return and
supply registers should be free of any obstructions. The filters
should be cleaned or replaced. These few steps will help to keep
the product up time to a maximum.
(on page 11) should help in identifying problems if the unit does
not operate properly.
YCLE
Electric Heat kW
8
10
15
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
WARNING
The Troubleshooting Chart
SERVICE
THE FOLLOWING INFORMATION IS FOR USE BY QUALIFIED
SERVICE AGENCY ONLY: OTHERS SHOULD NOT ATTEMPT TO
SERVICE THIS EQUIPMENT.
Common Causes of Unsatisfactory Operation of Heat Pump on
the Heating Cycle.
I
A
NADEQUATE
IR
When a heat pump is in the heating cycle, the indoor coil is func-
tioning as a condenser. The return air filter must always be clean,
and sufficient air volume must pass through the indoor coil to pre-
vent excessive discharge pressure, and high pressure cut out.
O
A
UTSIDE
IR INTO
Do not introduce cold outside air into the return duct of a heat
pump installation. Do not allow air entering the indoor coil to drop
below 65° F. Air below this temperature will cause low discharge
pressure, thus low suction pressure, and excessive defrost cy-
cling resulting in low heating output. It may also cause false de-
frosting.
20
U
NDERCHARGE
An undercharged heat pump on the heating cycle will cause low
discharge pressure resulting in low suction pressure and frost
accumulation on the outdoor coil.
P
"T
OOR
ERMINATING
3
The unit's defrost terminating sensor must make good thermal
3
contact with the outdoor coil tubing. Poor contact may not termi-
nate the unit's defrost cycle quickly enough to prevent the unit from
cutting out on high discharge pressure.
M
ALFUNCTIONING
1. Solenoid not energized - In order to determine if the
solenoid is energized, touch the nut that holds the solenoid
cover in place with a screwdriver. If the nut magnetically
holds the screwdriver, the solenoid is energized and the
unit is in the cooling cycle.
2. No voltage at unit's solenoid - Check unit voltage. If no
voltage, check wiring circuit.
3. Valve will not shift:
a. Undercharged - check for leaks;
b. Valve Body Damaged - Replace valve;
c. Unit Properly Charged - If it is on the heating cycle,
raise the discharge pressure by restricting airflow through
the indoor coil. If the valve does not shift, tap it lightly on
both ends with a screwdriver handle. DO NOT TAP THE
VALVE BODY. If the unit is on the cooling cycle, raise the
discharge pressure by restricting airflow through the
outdoor coil. If the valve does not shift after the above
attempts, cut the unit off and wait until the discharge
and suction pressure equalize, and repeat above steps.
If the valve does not shift, replace it.
12
V
T
I
OLUME
HROUGH
NDOOR
R
D
ETURN
UCT
" S
ENSOR CONTACT
R
V
- T
EVERSING
ALVE
HIS MAY BE DUE TO
C
OIL
:
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