LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.-Continued

TM5-4120-384-14

LOCATION AND DESCRIPTION OF MAJOR COMPONENTS. - C o n t i n u e d

1-6.

NOTE

The air conditioner can be equipped for operation in

chemical-biological-radiological (CBR) environment by

connecting filtering equipment to the fresh air

filter.

RELIEF VALVE.

This safety valve opens when the refrigerant

d i s c h a r g e l i n e p r e s s u r e r i s e s a b o v e 5 4 0 p s i g ( 3 7 . 9 7 k g / c m2 ) .

CHARGING VALVE, REFRIGERANT SUCTION LINE. Provides a

connection point for charging and checking suction line pressure.

Provides a

CHARGING VALVE, REFRIGERANT DISCHARGE LINE.

connection point for charging and checking discharge line pressure.

This valve is normally

SOLENOID VALVE, PRESSURE EQUALIZING.

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.

This fan and motor draws outside

CONDENSER FAN AND MOTOR.

air over the condenser coil to remove heat from the refrigerant

passing through the tubes of the condenser coil.

COMPRESSOR.

Consists of a reciprocating compressor driven by

an electrical motor, hermetically sealed inside a steel container

An external (crankcase) heater is

with a lifetime charge of oil.

The purpose of the

attached to the lower part of the container.

heater is to prevent possible damage to the compressor caused by

liquid refrigerant accumulation in the cylinders during a period of

The heater is connected directly to input power and is

shut down.

thermostatically controlled to prevent overheating.

CONDENSER

COIL.

Made up of interconnected parallel copper

tubes retained in a series of multiple, closely spaced aluminum

This coil serves as a heat exchanger to remove the heat from

fins.

the compressed refrigerant vapor so that it will condense into a

liquid.

DEHYDRATOR,

DESICCANT,

REFRIGERANT

(FILTER/DRIER).

Removes

moisture and contaminants from the refrigerant.

RECEIVER.

The

receiver

acts

storage

tank

for

the

liquid

refrigerant.

This valve is normally open

S O L E N O I D VALVE, LIQUID LINE.

when the compressor is NOT running and is thermostatically

controlled during cooling cycles when operating in the COOL mode.

1-7