GPC14H Installation Manual
7
b. Heat Pumps- Connect 24V wires from the thermostat to
the corresponding wires in the control box using No.
18AWG as follows:
TERMINAL THERMOSTAT
Red R (24V)
Green G (Fan)
Orange O (Rev. Valve)
White W1 (Heat, 2nd)*
Brown W2 (Heat 3rd)*
Yellow Y (Cool)
C (Blue) C (Common)
*Optional field installed heat connections
TABLE 3
Internal Wiring:
A diagram detailing the internal wiring of this unit is located
on the electrical box cover. If any of the original wire supplied
with the appliance must be replaced, the wire gauge and
insulation must be the same as the original wiring.
Transformer is wired for 230 volts on the 208/230 models.
See wiring diagram for 208 volt wiring.
BRANCH CIRCUIT AMPACITY
15 20 25 30 35 40 45 50
SUPPLY WIRE LENGTH -
FEET
200 64443322
150 86644433
100 108866644
50 14 12 10 10 8 8 6 6
TABLE 4
1. For branch circuit wiring (main power supply to unit
disconnect), the minimum wire size for the length of the
run can be determined from Table 4 using the circuit
ampacity found on the unit rating plate. From the unit
disconnect to unit, the smallest wire size allowable in Table
4 may be used for the ampacity, as the Disconnect must
be in sight of the unit.
2. Wire size based on 60° C rated wire insulation and 30° C
Ambient Temperature (86° F).
3. For more than 3 conductors in a raceway or cable, see the
N.E.C. for derating the ampacity of each conductor.
OPERATION
Start-Up Procedure and Checklist
Begin with power turned off at all disconnects.
WARNING
HIGH
VOLTAGE
!
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR INSTALLING
THIS UNIT.
M
ULTIPLE POWER SOURCES MAY BE PRESENT. FAILU
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY O
DEATH.
RE
R
1. Turn thermostat system switch to “Cool,” and fan switch to
“Auto” and turn temperature setting as high as it will go.
2. Inspect all registers and set them to the normal open
position.
3. Turn on the electrical supply at the disconnect.
4. Turn the fan switch to the “ON” position. The blower should
operate after a 7 second delay.
5. Turn the fan switch to “Auto” position. The blower should
stop after a 65 second delay.
6. Slowly lower the cooling temperature until the unit starts.
The compressor, blower and fan should now be operating.
Allow the unit to run 10 minutes, make sure cool air is
being supplied by the unit.
7. Turn the temperature setting to the highest position,
stopping the unit. The indoor blower will continue to run for
65 seconds.
8. Turn the thermostat system switch to “OFF” and disconnect
all power when servicing the unit.
WARNING
HIGH
VOLTAGE
!
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR INSTALLING
THIS UNIT.
M
ULTIPLE POWER SOURCES MAY BE PRESENT. FAILU
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY O
DEATH.
RE
R
Heat Pump Start-Up Procedure
9. Check the cooling mode for the heat pump in the same
manner as above. The reversing valve is energized when
the thermostat is placed in the cooling position. A clicking
sound should be noticeable from the reversing valve. By
lowering the temperature setting to call for cooling, the
contractor is energized. The compressor, blower and fan
should then be running. After the cooling mode is checked
out, turn the thermostat system switch to “OFF”.
10. Turn the thermostat system switch to “HEAT” and fan switch
to “AUTO”.
11. Slowly raise the heating temperature setting. When the
heating first stage makes contact, stop raising the
temperature setting.. The compressor, blower and fan
should now be running with the reversing valve in the de-
energized (heating) position. After giving the unit time to
settle out, make sure the unit is supplying heated air.
12. If the out door ambient is above 80°F, the unit may trip on
its high pressure cut out when on heating. The compressor
should stop. The heating cycle must be thoroughly
checked, so postpone the test to another day when
conditions are more suitable but-DO NOT FAIL TO TEST.
If the out door ambient is low and the unit operates properly
on the heating cycle, you may check the pressure cutout
operation by blocking off the indoor return air until the unit
trips.
13. If unit operates properly in the heating cycle, raise the
temperature setting until the heating second stage makes
contact. Supplemental resistance heat, if installed should
now come on. Make sure it operates properly.
NOTE: If outdoor thermostats are installed the outdoor
ambient must be below the set point of these thermostats
for the heaters to operate. It may be necessary to jumper
these thermostats to check heater operation if outdoor
ambient is mild.
14. For thermostats with emergency heat switch, return to step
11. The emergency heat switch is located at the bottom of
the thermostat. Move the switch to emergency heat. The
heat pump will stop, the blower will continue to run, all
heaters will come on and the thermostat emergency heat
light will come on.