Installation Instructions

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 weather-

proof 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.

CIRCULATING AIR AND FILTERS

IRFLOW CONVERSION

Units can easily be converted from horizontal to down-discharge airflow delivery.

In down-discharge or high static installations, the installer should measure the

total external static and review the blower performance charts before perform-

ing the installation. In some installations it will be necessary to change the blower

speed to provide proper air flow.

HORIZONTAL AIR FLOW

Single phase models are shipped without horizontal duct covers. If needed, these

kits may be ordered through Goodman’s Service Parts department.

Down Discharge Applications

Cut insulation around bottom openings and remove panels from the bottom of

the unit, saving the screws holding the panels in place.

NOTE: Single phase models require installation of horizontal duct kit

#20464501PDGK (medium chassis) and #20464502PDGK (large chassis).

DUCTWORK

Duct systems and register sizes must be properly designed for the C.F.M. and external static pressure rating of the unit. Ductwork

should be designed in accordance with the recommended methods of Air Conditioning Contractors of America Manual D (Residen-

tial) or Manual Q (Commercial). All ductwork exposed to the outdoors must include a weatherproof barrier and adequate insulation.

A duct system should be installed in accordance with Standards of the National Board of Fire Underwriters for the Installation of Air

Conditioning, Warm Air Heating and Ventilating Systems. Pamphlets No. 90A and 90B.

Duct Cover Installation

Typical Electrical Wiring Unit Voltage

Note:Junction box location

shown is optional and is

for illustration purposes only.

JUNCTION BOX