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 TM 55-1925-273-10-1
0038 00
TO ATMOSPHERE
CONN FORWARD
REG VALVE
WATER OUT
CONDENSER
WATER IN
EQUALIZING LINE
RECEIVER
T
HEAT EXCHANGER
SUCT
KING SOLENOID
VALVE
T
DISCH
COMP-
RESSOR
FILTER/DRIER
SIGHTGLASS
CHARGING &
DRAIN CONN
DETAIL C
AMS-2
Figure 2. Refrigeration System (Sheet 3 of 3)
CONDENSER UNIT
The condenser unit is the system's heat exchanger. It transfers heat from the refrigerant to raw water circulated by the general
service system.
UNIT COOLER
The unit cooler contains coils that transfer heat from the air to the refrigerant. Two fans circulate air across the coils to
improve heat transfer. A timer provides timed defrost cycles for the freeze room unit to clear the coils of frost buildup. This
circuit is also fitted with a "fail safe" feature to prevent the defrost cycle from running too long. Water generated from the
defrost cycle drains to a drip pan (figure 2) and into drain lines. Drain lines within the refrigerated spaces are fitted with heat
tape to prevent freezing.
EXPANSION VALVE
The expansion valve (figures 1 and 2) regulates the amount of refrigerant delivered to the cooling coil. The amount of
refrigerant needed in the coil depends on the temperature of the space being cooled.
The compressor compresses heated refrigerant from the unit cooler to improve heat transfer in the condenser.
0038 00-4
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