Goodman [A/G]PG, Service Instructions Manual

Page: 14 / 52

PRODUCT DESIGN
14
HIGH VOLTAGE!
Disconnect ALL power before
changing any electrical wiring. Multiple
power sources may be present. Failure
to do so may cause property damage,
personal injury or death.
The units are designed for operation on 60 hertz current and at
voltages as shown on the rating plate. All internal wiring is
complete. Ensure the power supply to the compressor con-
tactor is brought to the unit as shown on the supplied unit
wiring diagram. The 24V wiring must be connected between
the unit control panel and the room thermostat.
LINE VOLTAGE WIRING
Power supply to the unit must be N.E.C. Class 1, and must
comply with all applicable codes. The unit must be electrically
grounded in accordance with the local codes or, in their ab-
sence, with the latest edition of the National Electrical Code,
ANSI/NFPA No. 70, or in Canada, Canadian Electrical Code,
C22.1, Part 1. A fused disconnected must be provided and
sized in accordance with the unit minimum circuit ampacity.
The best protection for the wiring is the smallest fuse or breaker
which will hold the equipment on line during normal operation
without nuisance trips. Such a device will provide maximum
circuit protection.
All line voltage connections must be made through weather
proof fittings. All exterior power supply and ground wiring must
be in approved weather proof conduit. Low voltage wiring from
the unit control panel to the thermostat requires coded cable.
See the following figures for ground level and rooftop wiring.
JUNCTION BOX
The unit transformer is connected for 230V operation. If the
unit is to operate on 208V, reconnect the transformer primary
lead and the induced draft blower leads as shown on the unit
wiring diagram.
NOTE: Some models use an induced draft
blower that has only a 230V lead. No wiring change is required
if the unit is equipped with a single tap induced draft blower.
If it is necessary for the installer to supply additional line volt-
age wiring to the inside of the package unit, the wiring must
comply with all local codes. This wiring must have a minimum
temperature rating of 105°C. and must be routed away from
the burner compartment. All line voltage splices must be made
inside the unit control box.