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Page Title:
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.-Continued |
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 TM5-4120-383-14
1-6.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.-Continued
o
21 FRESH AIR VENTILATION GUARD. Screens and filters fresh air
entering the unit.
NOTE
The air conditioner can be equipped for operation in
chemical-biological-radiological (CBR) environment by
connecting filtering equipment to the fresh air
filter.
o
22 RELIEF VALVE. This safety valve opens when the refrigerant
2
discharge line pressure rises above 540 psig (37.97 kg/cm ).
o
23 CHARGING VALVE, REFRIGERANT SUCTION LINE.
Provides a
connection point for charging and checking suction line pressure.
o
24 CHARGING VALVE, REFRIGERANT DISCHARGE LINE. Provides a
connection point for charging and checking discharge line pressure.
o
This valve is normally
open when the compressor is NOT running to equalize the pressure at
It closes when
the suction and discharge sides of the compressor.
the compressor starts.
o
air over the condenser coil to remove heat from the refrigerant
passing through the tubes of the condenser coil.
o
27 COMPRESSOR.
Consists of a reciprocating compressor driven by
an electrical motor, hermetically sealed inside a steel container
with a lifetime charge of oil. An external (crankcase) heater is
attached to the lower part of the container. The purpose of the
heater is to prevent possible damage to the compressor caused by
liquid refrigerant accumulation in the crankcase during a period of
shut down.
The heater is connected directly to input power and is
thermostatically controlled to prevent overheating.
o
28 CONDENSER COIL. Made up of interconnected parallel copper
tubes retained in a series of multiple, closely spaced aluminum
fins. This coil serves as a heat exchanger to remove the heat from
the compressed refrigerant vapor so that it will condense into a
liquid.
o
Removes
moisture and contaminants from the refrigerant.
o
30 RECEIVER.
The receiver acts as a storage tank for the liquid
refrigerant.
1-7
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