Holiday Navigator 2003 Owner's Manual page 373

Electrical Systems - Chassis
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Air Conditioner Refrigeration Components:
Compressor - The compressor is belt driven from the engine through
the compressor and electronic clutch pulley. The compressor will
pump freon from a low pressure gas into a high pressure, high
temperature gas. This is the start of the refrigeration process.
Condenser - The condenser in front of the radiator is made of coils
and fins which provide rapid transfer of heat from the refrigerant as
external air passes over the coils. The high pressure gas is changed to a
high pressure liquid.
Condenser Fan - A steady flow of cooling air is maintained across
the condenser during system operations. The fan is part of the hydraulic
system.
Receiver-Drier - Freon leaves the condenser, enters the dehydrator
and is stored until needed. The drier filters out moisture in the system.
It only takes one drop of moisture to cause a malfunction in the
cooling unit.
Expansion Valve - The expansion valve suppresses the refrigerant
into the evaporator according to the cooling requirements. The
pressure is reduced in the restrictive effort of the expansion valve. A
part of the valve is the capillary tube assembly. The capillary tube is the
sensing bulb at the outlet of the evaporator.
Evaporator - A tube core and fins are used in the evaporator similar
to the condenser. Air is blown through the fins to allow the evaporator
to cool and reduce the pressure.
Blower and Motor - Just as the condenser has a fan, the evaporator
has a fan called the blower. The blower will draw air from the cab
area and force the air over the evaporator coils and fins. This forced
air will ensure continuous vaporizing of the R134a.
Relays and Switches - Both electronic and vacuum switches are used
in the control and operations of the system.
9 • 3 7 3
N A V I G A T O R 2 0 0 3