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

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General information on refrigerant circuit<br />

Página 2 de 21<br />

A/C compressor is driven by vehicle engine via a ribbed<br />

belt.<br />

An electromagnetic clutch attached to A/C compressor<br />

provides the power link between the ribbed belt pulley and<br />

A/C compressor crankshaft with A/C system switched on.<br />

A fuse installed in ribbed belt pulley of A/C compressor<br />

triggers the electromagnetic clutch when A/C compressor<br />

runs with resistance and protects the ribbed belt drive<br />

against overload.<br />

The A/C compressor extracts the refrigerant gas from the<br />

evaporator, compresses it and relays it to the condenser.<br />

Note:<br />

- The A/C compressor contains refrigerant oil, which can be<br />

mixed with refrigerant R134a under any temperature.<br />

- The refrigerant for which the A/C compressor is designed<br />

is listed on the manufacturers plate. A regulator valve<br />

regulates pressure within the specified range (control<br />

characteristics) on the low pressure side.<br />

- So that the A/C compressor is not damaged when<br />

refrigerant circuit is empty, the A/C clutch is switched off<br />

and the A/C Compressor Regulator Valve N280 is no<br />

longer activated (A/C compressor runs at idle with engine).<br />

A/C compressor without A/C clutch<br />

A/C compressor is driven by vehicle engine via a ribbed<br />

belt.<br />

An overload safeguard (bearing-type connection) installed<br />

in ribbed belt pulley of A/C compressor triggers when A/C<br />

compressor runs with resistance and protects the ribbed<br />

belt drive against overload.<br />

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

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

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