Holiday 2002 NEPTUNE, Руководство пользователя

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Electrical Systems - Chassis
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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 dur-
ing 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 cap-
illary 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 condens-
er. 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 continu-
ous vaporizing of the R134a.
Relays and Switches:
Both electronic and vacuum switches are used in the control and oper-
ations of the system.