16
4. Consult proper table for quantity of air.
If the external static pressure exceeds the minimum or max-
-
ters, undersized or poorly laid out ductwork.
Blower speeds are changed at the indoor blower. The igni-
tion control board has four blower speeds: LOW HEAT, HI
HEAT, LOW COOL and HIGH COOL.
FAN ONLY energizes at LOW HEAT speed. The
GPG16 models are equipped with EEM motors. EEM mo-
tors are constant torque motors with very low power con-
sumption. This motor is energized by 24 VAC. Adjust the
CFM for the unit by changing the 24 VAC leads to the speed
terminal block on the motor.
-
perature rise shown on rating plate. Blower speeds are pro-
-
pendix for details.
AVI PA I A I V
IAPW I AGIGP AP
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Check limit control operation after 15 minutes of operation
1. After several minutes the main burners must go OFF.
Blower will continue to run.
2. Remove air restrictions and main burners will relight
after a cool down period of a few minutes.
Adjust the thermostat setting below room temperature.
1. Main burners must go OFF.
2. Circulating Air Blower will continue to run for 90, 120,
150 or 180 seconds, depending on the setting.
If necessary, adjust fan OFF delay settings to obtain
satisfactory comfort level.
1. Set the thermostat to lowest setting.
2.
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.
6. Replace the heat exchanger door on the unit.
7. If cooling and/or air circulation will be desired, turn ON
the electrical power.
The outdoor temperature must be 60°F or higher be-
fore making adjustments to charge.
The compressor includes components which are designed
to protect the compressor against abnormal operating con-
ditions.
Check unit charge before putting the cooling section into full
operation. The unit has a thermostatic expansion valve me-
tering device. To ensure the unit is properly charged for the
intended application, check the unit refrigerant sub-cooling
at the condenser. The refrigerant sub-cooling is a function of
outdoor ambient temperature and return air temperature of
the conditioned space. It is the installing contractors respon-
sibility to ensure the proper refrigerant sub-cooling at the
condenser is adjusted for each application. As the outdoor
ambient temperature rises the sub-cooling decreases and
as the outdoor ambient temperature lowers, the sub-cooling
increases. Proper sub-cooling adjustment optimiz-
es cooling performance. Models equipped with thermostatic
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