SAFARI STORME MY14

HVAC 23 HVAC PRINCIPLE When the current is fed to the coil magnetic force is generated in iron, which attracts any other iron. CONSTRUCTION A magnetic clutch consists of a stator, rotor with pul- ley, and pressure plate to engage the drive pulley and compressor magnetically. The stator is fixed on the compressor housing, and the pressure plate is attached to the compressor shaft. Two ball bearings are used between the inner surface of the rotor and the front housing of the compressor. OPERATION Whenever the engine is operating, the pulley is rotat- ing since it is connected to the crankshaft by a belt, but the compressor does not operate until the clutch is energized. When the air conditioning system is switched ON, the ECU generates a signal for ener- gizing the compressor. The electromagnet attracts the pressure plate and pulls the plate against the friction facings on the pulley. The friction between the facing and plate causes the clutch assembly to rotate as a unit, and drive the compressor. 10.1.5.5 CONDENSER The condenser is a heat exchanger used to cool the hot vapourised refrigerant. Also the refrigerant changes its state from vapour to liquid. The conden- ser in this vehicle, as in many other vehicles is placed in front of the radiator. A condenser fan is provided to force the air in to the condenser to cool the refrigerant inside the core. CONDENSER SEALING DUCTS Sealings are used to guide the flow of the air to the condenser and also to avoid the hot air recirculating from the engine compartment to the condenser.