M09010 05/02 Air Conditioning System M9-1
for HFC 134a Refrigerant
AIR CONDITIONING SYSTEM
Environmental Impact
Environmental studies have indicated a weakening of the earth’s protective Ozone (O
3
) layer in the outer strato-
sphere. Chloro-flouro-carbon compounds (CFC’s), such as R-12 refrigerant (Freon), commonly used in mobile
equipment air conditioning systems, have been identified as a possible contributing factor of the Ozone depletion.
Consequently, legislative bodies in more than 130 countries have mandated that the production and distribution of
R-12 refrigerant be discontinued after 1995. Therefore, a more “environmentally-friendly” hydro-flouro-carbon
1. Blower Switch
2. Thermostatic Switch
3. Battery Supply
4. Circuit Breaker
5. Blower
6. Temperature Sensor
7. Evaporator
8. Expansion Valve
9. Suction Line
10. Test Gauges & Manifold
11. Compressor
12. Refrigerant Container
13. Magnetic Clutch
14. Compressor Drive Pulley
15. Receiver / Dryer
16. Discharge Line
17. Condenser
FIGURE 9-1. BASIC AIR CONDITIONING SYSTEM
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