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TM 9-4120-389-14
EVAPORATOR INLET LOUVER (5) - Adjustable louvers allow control of outside (fresh) and return (from
room and enclosure) air.
AIR CONDITIONING FILTER (6) - Provides filtered return air.
EVAPORATOR MOTOR AND FANS (7) - Draw air into the evaporator section and exhausts it through the
evaporator (cooling) coil and heater elements into the room or enclosure.
EVAPORATOR COIL (8) - Serves as a heat exchanger by transferring heat from the air passing over the
tubing and fins to the refrigerant passing through the tubing.
INPUT POWER RECEPTACLE (9) - For connection of external power source cable.
JUNCTION BOX (10) - Contains and protects electrical system control devices.
CONTROL MODULE (11) - Contains a five position mode selector switch, a temperature control thermostat,
a control circuit breaker switch and a compressor circuit breaker switch.
HIGH AND LOW REFRIGERANT PRESSURE CUTOUT SWITCHES (12) - Protects compressor from possible
damage due to excessive high or low refrigerant pressures.
COMPRESSOR (13) - Pumps refrigerant through the system during cooling operations.
FRESH AIR FILTER AND DAMPER (14) - Provides filtered outside air.
CONDENSER GUARD (15) - Protects condenser coil from damage.
CONDENSER COIL (16) - Serves as a heat exchanger by transferring heat from the refrigerant passing
through the tubing to the air passing over the tubing and fins.
REFRIGERANT SIGHT GLASS (17) (liquid sight indicator) - Allows visual inspection and indicates condition
of liquid refrigerant when the unit is operating in cooling mode.
AUXILIARY POWER RECEPTACLE (18) - Alternate power connection.
CONDENSER DAMPER (19) - Linked to ACTUATOR. Modulates volume of exhaust air.
CONDENSER MOTOR AND FAN (20) - Draws outside ambient air over and through the condenser coil.
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