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TM 9-4120-367-14
TM 07592B-14/1
o. Condensate Drain Plug. Drain connection for water collected below evaporator coil.
p. Condenser Fan Switch. Controls fan speed. At temperatures above 100° F (38°C), closes to allow high speed;
below 100°F (38°C), opens to allow only low speed operation.
q. Fresh Air Filter. This filter cleans outside air drawn into the shelter.
NOTE
The air conditioner can be equipped for operation in chemical-biological-radiolo-
gical (CBR) environment by connecting filtering equipment to the fresh air filter.
r. Louver Assembly. Automatically controlled by actuating cylinder.
1.8.2 Evaporator Section (See figure 1-3.)
a. Evaporator Expansion Valve. This valve controls the amount of liquid refrigerant to the evaporator.
c. Evaporator Coil. The evaporator coil converts the liquid refrigerant into gas to cool the air.
d. Mist Eliminator.The purpose of the mist eliminator is to trap droplets of condensed water which have formed
on the evaporator coil, so that they will not be blown into the air conditioned space.
e. Accumulator. The accumulator is a tank that holds the liquid refrigerant which might be mixed with the gas leav-
ing the evaporator coil preventing liquid refrigerant from entering the compressor.
f. Input Power Receptacle (alternate location). Connection for power supply.
g. Ground Connection. The ground connection is an exteranl point where shelter or van electrical ground is con-
nected to the air conditioner.
h. Low Pressure Switch. This switch opens when suction line pressure drops to 10 to 20 psig (.703 to 1.406 l@
cm2). This switch must be hand re-set after the pressure rises above 40 psig (2.812 kg/cm2).
i.
High Pressure Switch. The high pressure switch opens when the discharge line pressure rises to 435 to 455 psig
(30.58 to 31.99kg/cm2) to stop the compressor. This switch must be hand reset after the line pressure drops to
320 psig (22.50 kg/cm2).
j
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Evaporator Blower and Motor. The evaporator blower and motor blows the shelter air over the evaporator coil
to give up heat to the refrigerant (cool mode) or draws in the fresh air or shelter air for ventilation.
a. Heating Elements. The heating elements heat the air before it passes through the evaporator coil.
b. Thermostatic Switch (overheat safety). The thermostatic switch opens the heating circuit at 145°F to 150°F
(63°C to 66°C and closes at 100°F to 120°F (38°C to 49°C).
1-7
b. Distributor. This distributor divides expanding refrigerant to three circuits of the evaporator coil.
k. Air Filter. The air filter removes dirt and dust from the air that is to be conditioned (not illustrated, located behind
air intake grill).
1.8.3 Heating Section (See figure 1-4.).
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