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, has been identified as a possible contributing factor to 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
FIGURE 9-1. BASIC AIR CONDITIONING SYSTEM (TYPICAL)
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
M09010 6/97 Air Conditioning System M9-1
for HFC 134a Refrigerant
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