Furnace; Operation - Monaco 2002 Diplomat Service Manual

Heat Pump Operation:
The living room comfort control operates the roof air conditioners.
• Select the desired Zone by pressing the ZONE button.
• Press the MODE button repeatedly until HEAT PUMP is displayed.
• Set desired fan speed by pressing the FAN button.
• Set desired heating temperature by pressing the UP or DOWN buttons.
The furnace and its related components are 12 Volt DC operated, using
LP-Gas as the fuel source. Electronic circuitry (automatic ignition) is used to
ignite the burner. The furnace uses outside air for the burner combustion and
exhaust is expelled through the outside vent. Inside air is drawn into the furnace
and blown across the internal heat exchanger. Heated air is then discharged
through ducted hoses which can be run throughout the motorhome.
WARNING: IF YOU SMELL GAS extinguish all open flames
and turn off the main gas supply. Liquid propane is a highly
volatile, extremely dangerous gas. It can explode or ignite,
which may result in property damage, injury or death.
Propane is "heavy" and can "float" on the floor or "hide" in
corners. Open all windows and doors. Do not touch electrical
switches. They may spark, which can ignite. Keep all open
flames, spark producing devices and smoking material out of
the area. Contact a qualified service center to have the prob-
lem correctly diagnosed and repaired before resuming opera-
tion.
CAUTION: Do not store any items or materials in the furnace
area. Restricted air flow may hamper furnace operation
leading to failure and/or fire hazard.
The furnace operates in the following manner: The wall thermostat sends a
signal to the front roof air conditioner circuit board, which closes a relay.
Closing a relay sends an electrical signal to the furnace to begin the ignition
cycle. There is a small time delay before the blower motor begins. Once the
blower motor attains a predetermined speed it will close the sail switch. The
sail switch, which is now closed, sends the electrical signal through a high
temperature protection switch, then to the automatic ignition circuit board.
After the thermostat is satisfied, the gas valve closes and extinguishes the burner.
The blower motor stops approximately two or three minutes after cool down.
The furnace will operate when the following conditions have been met:
1. The LP-Gas valve on the LP tank is open and the LP-Gas valve at the
furnace is on.
2. The house batteries in the motorhome are fully charged.
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D I PL OM AT
Appliances

FURNACE

Operation

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