Monaco DYNASTY 2006, Руководство пользователя

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302 • SECTION 9 — ELECTRICAL SYSTEMS - CHASSIS DYNASTY 2006
System 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, behind the steer axle, is made of coils and fi ns 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 fl ow of cooling air is maintained across the condenser during system operations.
Receiver-Drier - Freon leaves the condenser, enters the receiver-drier and is stored until needed. The
drier fi lters 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 fi ns are used in the evaporator similar to the condenser. Air is blown
through the fi ns 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 fi ns. 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.
Vacuum Generator -
The vacuum generator is important
to the operation of the dash heating and A/C systems.
This provides the vacuum to open and close the vacuum
switches. The vacuum generator creates 15 inches of
vacuum that is passed to a reservoir ball. Most dash heater
and A/C systems will only require 10 inches of vacuum to
operate the switches. The output from the reservoir is sent
to the vent control knob. The control knob will then direct
the vacuum operation to the appropriate vacuum switch
to open or close vents and switches. When the ignition is
on and the A/C is operating, the vacuum generator will
operate.
030947
Vacuum Generator: Located at front fi rewall.