Goodman GM9S80 Service And Troubleshooting page 6

SYSTEM OPERATION
applicable codes. The furnace must be electrically grounded
in accordance with local codes or, in their absence, with the
latest edition of The National Electric Code, ANSI NFPA 70
and/or The Canadian Electric Code CSA C22.1. An electri-
cal disconnect must be provided at the furnace location.
NOTE: Line polarity must be observed when making field
connections.
Connect hot, neutral, and ground wires as shown in the wir-
ing diagram located on the unit's blower door. Metal conduit
is not considered a substitute for an actual ground wire to
the unit. Line polarity must be observed when making field
connections. Line voltage connections can be made through
either the right or left side panel.
The furnace is shipped configured for a right side (left side
for counterflow) electrical connection with the junction box
located inside the burner compartment. To make electrical
connections through the opposite side of the furnace, the
junction box must be relocated to the other side of the burn-
er compartment prior to making electrical connections.
Edges of sheet metal holes may be sharp. Use gloves as a
precaution when removing hole plugs.
NOTE: Wire routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.
To avoid the risk of electrical shock, injury, or death, the
furnace must be electrically grounded in accordance with
local codes or, in their absence, with the latest edition of
the National Electric Code.
115 Volt Line Connection of Accessories
(Electronic Air Cleaner)
HIGH VOLTAGE
Disconnect ALL power before servicing or
changing any electrical wiring. Multiple pow-
er sources may be present. Failure to do so
may cause property damage, personal injury
or death.
ACCESSORY LOAD SPECIFICATIONS
Electronic
1.0 Amp maximum at 120 VAC
Air Cleaner
Humidifier 1.0 Amp maximum at 24 VAC
Turn OFF power to the furnace before installing any acces-
sories. Follow the humidifier or air cleaner manufacturers' in-
structions for locating, mounting, grounding, and controlling
these accessories.
6
CAUTION
WARNING
WARNING
If it is necessary for the installer to supply additional line
voltage wiring to the inside of the furnace, the wiring must
conform to all local codes, and have a minimum temperature
rating of 105°C. All line voltage wire splices must be made
inside the furnace junction box.
ELECTRICAL
24 Volt Thermostat Wiring
Important Note: Wiring routing must not interfere with
circulator blower operation, filter removal or routine
maintenance. Low voltage connections can be made
through either the right or left side panel. Thermostat wiring
entrance holes are located in the blower compartment. The
following figure shows connections for a "heat/cool system".
This furnace is equipped with a 40 VA transformer to facili-
tate use with most cooling equipment. Consult the wiring di-
agram, located on the blower compartment door, for further
details of 115 Volt and 24 Volt wiring.
Thermostat Wiring Diagrams
G
W R
G
W R
Thermostat - Single-Stage Heating with Single-Stage Cooling
W R G
W R G
Thermostat - Single-Stage Heating with Two-Stage Cooling
Fossil Fuel Applications
This furnace can be used in conjunction with a heat pump
in a fossil fuel application. A fossil fuel application refers to
a combined gas furnace and heat pump installation which
uses an outdoor temperature sensor to determine the most
cost efficient means of heating (heat pump or gas furnace).
A heat pump thermostat is required to properly use a sin-
gle-stage furnace in conjunction with a heat pump. Refer to
the fossil fuel kit installation instructions for additional ther-
mostat requirements.
Strictly follow the wiring guidelines in the fossil fuel kit instal-
lation instructions. All furnace connections must be made
to the furnace two-stage integrated control module and the
"FURNACE" terminal strip on the fossil fuel control board.
Y
C
ROOM THERMOSTAT
INTEGRATED FURNACE
C
Y2
Y/Y1
CONTROL MODULE
REMOTE COOLING UNIT
C
Y
(SINGLE STAGE)
C Y1 Y2 ROOM THERMOSTAT
INTEGRATED FURNACE
C Y2
Y/Y1
CONTROL MODULE
REMOTE COOLING UNIT
C Y1
Y2
(TWO STAGE)