GC9C80 Installation Manual
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W2 W/W1 R G C Y/Y1 Y2
115 VAC EAC
115 VAC HUM
The furnace integrated control module is equipped with
a low voltage terminal for providing power to an optional
energized any time the draft inducer is powered. See con-
nection diagram below.
This is a 24 volt circuit only, the common connec-
(where thermostat wires are connected). Wiring for this cir-
cuit must NOT be connected to the line N location where line
voltage neutral wires are connected.
W2 W/W1 R G C Y/Y1 Y2
24V HUM
Terminal is
energized when
pressure switch
is closed
24 VOLT HUM.
& HUMIDISTAT
Natural Gas Minimum: 4.5" w.c. Maximum: 10.0" w.c.
Propane Gas Minimum: 11.0" w.c. Maximum: 13.0" w.c.
The furnace rating plate includes the approved furnace gas
input rating and gas types. The furnace must be equipped to
operate on the type of gas applied. This includes any con-
version kits required for alternate fuels and/or high altitude.
Inlet gas supply pressures must be maintained within the
must be constant and available with all other household gas
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sure must be maintained to prevent unreliable ignition. The
When this furnace is installed at high altitude, the appropri-
due to the natural reduction in the density of both the gas
fuel and combustion air as altitude increases. The kit will
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