TB-9-2510-251-13
TECHNICAL BULLETIN
OPERATOR AND FIELD MAINTENANCE; INSTALLATION MANUAL (INCLUDING REPAIR PARTS LIST); FOR ADD-ON-ARMOR (AoA) AIR CONDITIONING
AUGUST 2007
TB-9-2510-251-13 - Page 16 of 624
1-8
TB 9-2510-251-13
1-13. M998, M1025, M1037,
AND M1097 AIR-CONDITIONING
KIT
SYSTEM OPERATION
C
The air-conditioning kits covered in this manual applies to the to M998 and M998A1; M1025, M1025A1,
M1025A2; M1037; M1097, M1097A1, and M1097A2 HMMWV variants vehicles and consists of the following
major components:
COMPRESSOR
- Inside the compressor, low pressure gas refrigerant is compressed into a high
pressure gas that is pushed into the condenser by the compressor.
DISCHARGE LINE
- High pressure gas is carried through the discharge line from the compressor
to the condenser.
CONDENSER
- Refrigerant enters the condenser as a high pressure gas. When condensed, it
gives up its heat to the outside air and becomes a high pressure liquid.
LIQUID LINE
- High pressure liquid refrigerant is carried back to the evaporator by the liquid line
to repeat the evaporation/condensation cycle.
RECEIVER-DRIER
-
The receiver-drier functions as a drier, refrigerant filter and temporary
storage tank for refrigerant moving through the AC system.
EXPANSION VALVE
- High pressure liquid refrigerant enters a non-adjustable expansion valve
where the refrigerant is formed into a liquid spray.
EVAPORATOR
- Refrigerant enters evaporator as a liquid spray. It absorbs heat from the air in
the patient compartment and vaporizes into a low pressure gas.
SUCTION LINE
-Refrigerant in low pressure gas form is drawn from the evaporator by the suction
action of the compressor.
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