Monaco SIGNATURE 2001 series, Owner'S Manual

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Compressor -
The compressor is belt driven from the engine and uses an
electric clutch pulley. The electric clutch is controlled by the thermostat
switch. 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 air conditioning condenser is mounted in front of the radia-
tor. The coils and fins provide a rapid transfer of heat from the refrigerant as
external air passes over the coils. Then the high pressure gas is changed to a
high pressure liquid.
Condenser Fan -
A steady flow of cooling air is maintained across the con-
denser using the hydraulic fan 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 effect 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. 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.
A/C Heater: The A/C system will also produce heat to warm the air in the
dash area. Much like the refrigeration side of the system a liquid will be used
in the process. This liquid is the engine coolant. The coolant is passed from
the radiator to an electronic water valve. The water valve, when open, will
allow the coolant to flow through the heater core. The heater core is tubing
and fins. 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. When the temperature control is in the WARM
position, coolant flows through the heater core. When the temperature is in
the COOL position, coolant flow by-passes the heater core. In either position
the air flow is felt at the discharge vents.
Electrical Systems - Chassis
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S I G N A T U R E
9 • 2 4 7
Components