Mandalay 38A 2004, Owner'S Manual, Page: 52 / 94

DASH HEATER/AIR CONDITIONER
WARNING: The air conditioning system contains refrigerant 134a under high pressure and
should be serviced by qualified personnel only. Improper service methods could cause
serious personal injury.
Your new motorhome has been equipped with the industry’s highest performance integrated heating/air
conditioning system. While this system is much more powerful than those used in passenger cars, it is, none
the less, not capable of heating and cooling the entire motorhome. This system is designed to provide
windshield defrost and heating and cooling for the front seat occupants only. By following the operating
instructions and tips, this heater/air conditioner will provide many years of comfort and dependable service.
SYSTEM LAYOUT
The heater/air conditioner unit is located beneath the dash on the passenger side of the vehicle with heating
and cooling coils located on the outside of the firewall. In most modes of operation the unit takes fresh air from
outside, and heats or cools it before discharging into the vehicle. Only when operated in the MAX A/C mode
does the system take air from inside the vehicle.
OPERATING INSTRUCTIONS
CONTROL PANEL OPERATION
The control panel enables the driver to control the temperature, volume and direction of the air discharged
from the heating/air conditioning system.
BLOWER CONTROL
One of the best ways of controlling temperature is by changing the speed of the blower. The blower knob (left
of center) provides 4 speeds in any mode except OFF.
TEMPERATURE CONTROL
The center knob controls the temperature of the discharge air. Turn the knob to the right (red area) for warmer
air, and to the left (blue area) for cooler air.
OPERATING FEATURES
The air conditioning system is designed to operate in all modes except VENT, FLOOR and OFF. This provides
significant moisture, dust and pollen removal for enhanced passenger comfort.
The A/C will not function if the outside air temperature is below approximately 40° F.
In the event control vacuum is lost, the system is designed to discharge through the defrost vents.
7-2 Mandalay
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