Volkswagen Golf Service & Repair Manual: Connections to valves for switches in the refrigerant circuit

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / General information on refrigerant circuit / Switch and sender in refrigerant circuit and related connections / Connections to valves for switches in the refrigerant circuit

WARNING

Danger of freezing injuries.

If refrigerant circuit has not been evacuated, refrigerant will escape.

The refrigerant must be extracted before the valve -C- is removed. If the refrigerant circuit is not opened within 10 minutes after it has been evacuated, pressure may develop in coolant circuit due to re-evaporation. Extract refrigerant again.

The switches on the high-pressure and low-pressure sides have different threads.

Use only valves and O-rings that are resistant to refrigerant R134a and its associated refrigerant oils.

A -	Connection (soldered in)

B -

O-ring

C -	Valve (with O-ring)

Connections to valves for switches in the refrigerant circuit

Low-pressure switch for air conditioning system -F73

Function: In the event of pressure loss in the refrigerant circuit, switches the air conditioner compressor off (at approx. 2 bar). ...

Air conditioning system pressure switch -F129

This pressure switch has 3 functions: 1. Switches radiator fan to next higher speed when pressure increases in refrigerant circuit (approx. 16 bar). ...

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