Figure 11.33. Air conditioning system parts
1. Air conditioning is standard equipment on custom models. It works with the heater to achieve any reasonable air temperature inside the vehicle. It also reduces the humidity of incoming air, helping to disperse fog even when cooling is not required.
2. The air conditioner cooling system works like a home refrigerator. The compressor, connected by a belt to the crankshaft pulley, pumps coolant in a gaseous state from the evaporator. The compressed coolant passes through the radiator, where it loses heat and turns into a liquid state. After dehydration, the coolant returns to the evaporator, where it absorbs heat from the air passing over the evaporator fins. The coolant becomes a gas and the cycle repeats.
3. Various sensors protect the system from excessive temperature and pressure. The engine idle speed increases when the system is in use to compensate for the load imposed by the compressor.
Precautions
4. Although the coolant is not poisonous, in the presence of an open flame, a highly toxic gas is formed. Coolant spilled on the skin may cause frostbite. If coolant gets into the eyes, rinse them with a boric acid solution and immediately consult a doctor.
5. In view of the above and the need for specialized equipment to remove and recharge the system, leave this work to a specialist. If it is necessary to remove or disconnect a part as part of some other maintenance or repair operation, proceed as follows.
6. Never disconnect any part of the A/C coolant circuit unless the system has been discharged by a dealer or qualified coolant engineer.
7. Where the compressor or condenser impedes other mechanical actions, it is sufficient to unscrew the bolts from their fastenings and move them within the deflection of the flexible hose, but do not disconnect the hoses.
8. Upon completion, the system must be recharged.
9. Do not allow coolant hoses to heat up to temperatures above 110°C - be extremely careful when welding or when thermally drying the body after painting.
10. Do not use the air conditioner if the system is known to be low on coolant or damaged.