GPG16M Installation Instructions

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For unit protection, use a fuse or HACR circuit breaker that is in excess of the circuit ampacity, but less than or equal to the maximum
overcurrent protection device. DO NOT EXCEED THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through weatherproof fittings. All exterior power supply and ground wiring must be in
approved weatherproof conduit. Low voltage wiring from the unit control panel to the thermostat requires coded cable. See below for
ground level and rooftop wiring.
UNIT VOLTAGE
The unit transformer is factory connected for 230V operation. If the unit is to operate on 208V, reconnect the transformer primary lead
as shown on the unit wiring diagram. The induced draft blower on some models is equipped with a low speed 230V lead (blue) and a low
speed 208V lead (black). If equipped, connect the induced draft blower low speed 208V lead (black) in place of the low speed 230V lead
(blue). Place the unused 230V lead on the “PARK” terminal located on ignition control.
HEAT ANTICIPATOR SETTING
The heat anticipator is to be set by measuring the load (amperage) at the “R” circuit. Follow the instructions provided with the
thermostat for more details.
Electrical Power Directly To Junction Box
Electrical Power Routed Through Bottom of Unit
Note:Junction box location
shown is optional and is
for illustration purposes only.
JUNCTION BOX
Typical Electrical Wiring Unit Voltage