TM 9-4120-403-14
6 RETURN AIR FILTER Provides filtered return air.
8 CONDITIONED AIR (EVAPORATOR) FAN Draws air into the evaporator section and exhausts it
through the
evaporator (cooling) coil and heater elements into the room or enclosure.
9 INTAKE (RETURN) AIR GRILLE Adjustable louvers allow control of outside (fresh) and return (from room or
enclosure) air.
10 CONTROL PANEL Contains a five position mode selector switch, a temperature control thermostat and two
position fan toggle switch.
11 REFRIGERANT SIGHT GLASS (liquid sight indicator) Allows visual inspection and indicates condition of liquid
refrigerant when the unit is operating in the cool mode.
12 FRESH AIR DAMPER Provides outside air.
13 CONDENSER COIL GUARD Protects coil from damage.
14 CONDENSER COIL Serves as a heat exchanger by transferring heat from the refrigerant passing through the
tubing to the air passing over the tubing and fins.
15 COMPRESSOR CIRCUIT BREAKER (CB 1)
RESET KNOB Actuates a
push-pull type control cable for resetting
compressor circuit breaker.
16 CONDENSER AIR OUTLET GRILLE Protects personnel from injury and fan from damage.
17 INPUT POWER RECEPTACLE For connection of external power source cable.
NOTE
The air conditioner is designed so that the input power receptacle may be used in the rear panel location
shown, or it may be moved to one of two other alternative locations. See installation instructions (para. 4-
9).
18 CONDENSER FAN -
Draws air through the condenser coil and discharges the heated air back to
the outside
during cooling operations.
19 HIGH AND LOW REFRIGERANT PRESSURE CUTOUT SWITCHES (S5 AND S6) -
Protects compressor from
possible damage due to excessively high or low refrigerant pressures.
20 JUNCTION BOX - Contains and protects electrical system control devices.
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