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HICOOL |
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LOHEAT | U4 |
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| U3 |
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| K2 | |
HIHEAT |
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| U5 |
| P1 |
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| K1 | ||
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SPEEDUP |
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SW1 |
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FAULT | BLOWER | STAGE | ECON | R | C | W1 | W2 | G | Y1 | Y2 | |
RECALL | OFFDELAY | DELAY | |||||||||
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space. It is the installing contractors responsibility to ensure the proper refrigerant
NOTE: The expansion valve will not need adjustment for most applications. Ensure system superheat is set within range listed on chart.
Control Board (Top)
Design superheat & subcooling @ 95 °F outdoor ambient temperature
NOTE: If necessary, adjust fan OFF delay settings to obtain satis- factory comfort level.
Unit Shutdown
1. Set the thermostat to lowest setting. |
Models #
GPG152407041
GPG153009041
GPG153709041
GPG154211541
GPG154911541
GPG156014041
Superheat Adjustment
Superheat °F
8 ‐ 12
8 ‐ 12
5 ‐ 9
5 ‐ 9
5 ‐ 9
5 ‐ 9
Subcooling °F
‐‐‐
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12 ‐ 18
2. | Turn off the electrical power supply to the unit. |
3. | Remove the heat exchanger door on the side of the unit by |
| removing screws. |
4. | Move the gas control valve switch to the OFF position. Do |
| not force. |
5. | Close manual gas shutoff valve external to the unit. |
6. | Replace the heat exchanger door on the unit. |
7. | If cooling and/or air circulation will be desired, turn ON the |
| electrical power. |
COOLING STARTUP
NOTE: Check all manual reset limit controls in heating circuit if cooling mode does not operate.
Compressor Protection Devices
The compressor includes components which are designed to protect the compressor against abnormal operating conditions.
To adjust superheat, remove the control box cover and locate the expansion valve on the liquid line of the evaporator. Unscrew the cover from the expansion valve, locate the adjustment screw, and turn it clockwise (in) to increase superheat or counterclockwise (out) to decrease superheat. Replace adjustment cap. Wait a minimum of 10 minutes between adjustments to allow time for the TXV and pressures to stabilize.
Cooling Operation
NOTE: Mechanical cooling cannot be reliably provided at ambient temperatures below 50° F.
1.Turn on the electrical power supply to the unit.
2.Place the room thermostat selector switch in the COOL position (or AUTO if available, and if automatic changeover from cooling to heating is desired).
3.Set the room thermostat to the desired temperature.
Refrigerant Charge Check (Units with Fixed Orifice Devices)
After completing airflow measurements and adjustments the unit’s refrigerant charge must be checked. All package units with fixed orifice devices are charged using the super heat method at the compressor suction line.
For charge adjustments, see superheat and charts shown for each model.
Cooling Refrigerant Charging (Models with TXV)
Check unit charge before putting the cooling section into full operation. The unit has a thermostatic expansion valve metering device. To ensure the unit is properly charged for the intended application, check the unit refrigerant
TROUBLESHOOTING
IGNITION CONTROL ERROR CODES
The following presents probable causes of questionable unit operation. Refer to Diagnostic Indicator Chart for an interpretation of the signal and to this section for an explanation.
Remove the control box access panel and note the number of diagnostic LED flashes. Refer to Diagnostic Indicator Chart for an interpretation of the signal and to this section for an explanation.
FAULT RECALL
The ignition control is equipped with a momentary
15fault.