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1. Expansion valve-atomizes liquid refrigerant be-
fore passing to evaporator
2. Evaporator-absorbs heat from air in cab
SECTION 50 - CAB HEATING AND AIR CONDITIONING
Air conditioning principle of operation
3. Compressor-compresses and raises tempera-
ture of refrigerant gas
4. Condenser and receiver dryer-converts refriger-
ant from gas to a liquid
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