VW Golf manuals

Volkswagen Golf Service & Repair Manual: Pressures and temperatures in the refrigerant circuit

  WARNING
When working on the refrigerant circuit, observe generally applicable safety rules and the Regulations for Pressure Tanks.
The pressures and temperatures in the refrigerant circuit depend on the momentary operating conditions (e.g. engine speed, speed 1, 2, or 3 of radiator fan, engine temperature, whether air conditioner compressor is on or off) as well as environmental influences (e.g. ambient temperature, humidity, required cooling output).
In vehicles with air conditioner compressor regulating valve -N280-, the pressure on the low-pressure side is varied by activating the valve.
Therefore, the values given in the following tables may only be considered as guidelines. They occur at an engine speed of 1,500 to 2,000 rpm and an ambient temperature of 20°C after about 20 minutes.
The locations of connections provided for pressure measurements can be found in the vehicle-specific coolant circuits.
→ Rep. gr.87
At 20°C and with the engine stopped, the refrigerant circuit will adjust itself to a pressure of 4.7 bar positive pressure → Chapter.
   
Evaporator output temperature sender -G263- or evaporator temperature sensor -G308
Function: The evaporator output temperature sender -G263- or evaporator temperature sensor -G308- reads the temperature downstream from the eva ...

Refrigerant circuit with expansion valve
A- low-pressure side of the refrigerant circuit. B- high-pressure side of the refrigerant circuit.         ...

Other materials:

Dismantling and assembling auxiliary heater
Special tools and workshop equipment required     Torque wrench -V.A.G 1410- (4…20 Nm)   Hose clamps, up to 25 mm -3094- ...

Front brakes
The type of brake system installed in the vehicle is indicated among other things by the corresponding PR number on the vehicle data sticker. The vehicle data sticker can be found in the spare wheel well and in the service schedule. ...

Washing the vehicle
First read and observe the introductory information and safety warnings The longer substances such as insects, bird droppings, resinous tree sap, road dirt, industrial deposits, tar, soot or road salt and other corrosive materials remain on the vehicle, the more damage they do to the paintwo ...

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