Owner`s manual

181
2008 LAPALMA XL
ELECTRICAL SYSTEMS- CHASSIS — 9
Heat and Defrost Operation:
The air conditioning compressor operates
in all modes except VENT, FLOOR and OFF
to dehumidify the air. Rotate the temperature
control switch to set discharge air temperature.
Set the Mode Control Switch to the
desired position.
Set the Temperature Control Switch to
the red zone.
A/C Operation: The air conditioning
compressor operates in all modes, except vent,
oor and off, to dehumidify the air. Rotate the
temperature control switch to set discharge air
temperature.
Setting the Mode Control Switch to A/C
allows outside air into the system.
Setting the Mode Control Switch to
MAX A/C recirculates inside air. When
maximum cold air is desired, select this
position.
Set the Temperature Control Switch to
the blue zone.
NOTE:
The temperature control switch must be
set to the blue zone for cool air.
NOTE:
Activate the A/C system monthly to keep
internal components of the compressor
lubricated.
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Winter Use:
De-ice the windshield using the
DEFROST mode.
The system will heat up faster with a
slower blower speed until normal engine
operating temperature is obtained.
Summer Use:
Close all windows and vents preventing
hot and humid outside air from entering
the motorhome.
MAX A/C and HI blower provides quick
cool down.
Using a lower blower speed produces
cooler air.
Heater:
The heater warms the air in the dash area.
Engine coolant is passed from the radiator to
an electric water valve. The water valve, when
open, will allow the coolant to ow through the
heater core. The heater core is tubing and ns.
Air is drawn into the system by a blower motor
through the outside recirculation door opening.
Air is blown through the A/C evaporator core
and then through the heater core. Coolant ows
through the heater core when the temperature
control is in the WARM position. Coolant ow
bypasses the heater core when the temperature is
in the COOL position. In either position air ow
is felt at the discharge vents.
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Operating Tips and Hints:
Air intake and discharge temperatures are
greatly effected by ambient temperature
and relative humidity.
A large amount of cooling capacity is
used to dehumidify air as well as cool
it. After three to ve minutes of A/C
compressor operation, the discharged air
temperature should be about 30º F cooler
than the fresh or recirculated air entering
the A/C system.
At the beginning of the day, activate the
compressor with the engine at idle. This
will avoid sudden high speed activation
possible damage from lack of internal
compressor lubrication.
The dash A/C and heater system should
be used monthly to keep the compressor
lubricated.
Electric Water Valve:
The water valve controls the water ow to
the heater core. A control module compares
the output voltage from the thermostat to the
feedback for the stepper motor of the water
valve. The control module then drives the motor
to within one-half volt of the control thermostat
voltage.
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