Porsche P-80 2005, Руководство пользователя

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Page 4.6
Climate Control Systems Diagnosis & Repair
Cayenne Model System
Pressure Relief Valve
The pressure relief valve is a mechanical valve on the
compressor. It will open and vent refrigerant if pressure
exceeds 36-44 bar (522-580 psi). The valve will close
when pressure drops to a safe value.
Pressure Damper
The pressure damper is an enlarged chamber on the
refrigerant system low side. The damper reduces
refrigerant pulses in the line and reduces noise. It is
located near the compressor in front of the left front
wheel.
Condenser
The A/C condenser is integrated into the engine coolant
radiator module at the front of the vehicle. It is mounted in
front of the engine coolant radiator and fan.
Receiver/Dryer
The receiver/dryer on Cayenne models is a replaceable
cartridge that is integrated into the right side of the
condenser. The cartridge can retain 6-12 grams of water
and is serviceable. An access cover is on top of the
condenser. The refrigerant must first be recovered before
changing the cartridge.
Evaporator
The A/C evaporator is located in the air distribution
housing. Evaporator removal requires removal and disas-
sembly of the air distribution housing. The evaporator
temperature sensor is located right behind the evaporator.
Thermostatic Expansion Valve (TEV)
The H-type block Thermostatic Expansion Valve (TEV) is
located on the engine compartment rear bulkhead. Both
refrigerant lines to the evaporator pass through the
expansion valve. The A/C pressure sensor is located in the
same area.