172 | Section 4 Appliances ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ ----------------- Monarch SE 2004
The roof air conditioner will operate only when the fol-
lowing needs have been met:
• 120 Volts AC from either shore power or the generator
is supplied.
• House batteries are charged.
• The battery cut-off switch must be ON.
Thermostat Operation:
The thermostat operates the roof air conditioner and the
furnace.
Roof Air Operations:
• FAN ONLY - Move the FAN switch to the ON position. Use the HIGH
or LOW switch to set desired fan speed. Set the thermostat to desired tem-
perature.
• COOL - Move the SYSTEM switch to COOL. Move the FAN switch to
ON. Set the thermostat to the desired temperature. Use the HIGH or LOW
switch to set desired fan speed.
NOTE: The thermostat in the bedroom performs the same function
as the living room thermostat. The FURNACE position on the bedroom
thermostat is nonfunctional.
The furnace, and 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 fur-
nace and blown across the internal heat exchanger. Heated air is then dis-
charged through ducted hoses which can be run throughout the motorhome.
The furnace operates in the following manner: The wall thermostat sends a sig-
nal 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. When the blower motor attains a
predetermined speed it will close the air prover or sail switch. The sail switch
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 about two or
three minutes after cool down.
The furnace will operate when the following conditions have been met:
• The primary LP-Gas valve on the LP tank is open and the LP-Gas valve
at the furnace is on.
• The house batteries in the motorhome are charged.
• The battery cut-off switch must be ON.
FURNACE
Operation
050235B
Operation
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