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Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

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General information for A/C system<br />

Página 10 de 19<br />

a tendency to increase the greenhouse effect.<br />

Conversion programs are available for old existing systems<br />

filled with the ozone-depleting substance R12.<br />

<strong>Repair</strong> Manual for A/C systems with refrigerant R12<br />

For environmental protection reasons, refrigerants must not<br />

be released into the atmosphere 00-3, Laws and<br />

regulations (laws and regulations).<br />

Mode of operation of air conditioning<br />

system<br />

The temperature in the passenger compartment depends<br />

on the amount of heat radiated through the windows and<br />

conducted by the metal parts of the body. In hot weather it<br />

is possible to achieve a more comfortable temperature for<br />

the passengers by pumping off some of the heat.<br />

As heat spreads into cooler areas, the passenger<br />

compartment is equipped with a unit for generating low<br />

temperatures with constant evaporation of refrigerant. The<br />

heat required for this is extracted from the air flowing<br />

through the evaporator.<br />

After absorbing heat, the refrigerant is pumped off through<br />

the compressor. The action of the compressor increases<br />

the heat content and temperature of the refrigerant. Its<br />

temperature is then substantially higher than that of the<br />

surrounding air.<br />

The hot refrigerant flows with its heat content to the<br />

condenser, where the refrigerant dissipates its heat to the<br />

surrounding air via the condenser due to the temperature<br />

gradient between the refrigerant and the surrounding air.<br />

The refrigerant thus acts as a heat transfer medium. As it is<br />

to be reused, the refrigerant is returned to the evaporator.<br />

For this reason all air conditioning systems are based on<br />

the refrigerant circulation principle. There are however<br />

differences in the combination of aggregates.<br />

General work safety<br />

- As per VBG 20, German industrial liability insurance<br />

association.<br />

- Observe workshop specific instructions Environmental<br />

Protection Vol. 2-2. 23.0) , which must be hung in the<br />

refrigerant workshop.<br />

http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=...<br />

13/2/<strong>2005</strong>

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