Furnace - GMC Motor Home Operating Manual

IMPORTANT: Before operating the furnace see
carbon monoxide caution at the beginning of this
section .
The furnace is located in the compartment
under the kitchen sink. Two sizes are available
with either 22,000 BTU or 30,000 BTU ca-
pacities .
The furnace is operated on 12-volt DC only.
Furnace Thermosat
Furnace Manual Valve
FURNACE
48
SEQUENCE OF OPERATION
Whenever operating the furnace the window
above it should be fully closed, to help avoid
drawing carbon monoxide exhausted from its
vent back through the window .
When the thermostat is adjusted to the de-
sired setting, furnace blower motor is energized
immediately. After three to five seconds the
main burner of furnace will ignite . Following
two minutes of burner operation a "snap" will
be heard from within the furnace. This is the
furnace fan switch changing to its normal run
position . After this occurs, and the thermostat is
satisfied or is turned to a lower setting the main
burner flame will go out, but the blower will
continue to run for a short period of time and
then shut off.
If thermostat is adjusted to a lower setting,
or to "OFF" before the furnace has operated
for two minutes the blower and main burner
will shut off at the same time.
REMINDER : The furnace should not be used when
the vehicle is underway, and the LP gas should
be turned off at the LP gas tank .
LIGHTING FURNACE
NOTE :
Be sure manual control valve at LP
gas tank is fully open .
1 . Set thermostat, located in rear of Motor
Home living area to "OFF" position .
2 . Open furnace manual valve fully, located
under sink near the sink trap. Do not attempt to
Furnace Controls