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:

Trailer stabilisation
First read and observe the introductory information and safety warnings Trailer stabilisation is a subsidiary function of the electronic stabilisation programme (ESC). The trailer stabilisation function can detect if an attached trailer is starting to lurch from side to side. If a lurching ...

Introduction
This repair manual is intended to provide technicians and fitters with the basic knowledge required for performing trained work on these systems.   Note Successful completion of a training course such as AB160 or ST160 ...

Safety precautions when working on the cooling system
Risk of scalding by hot coolant When the engine is warm, the cooling system is under pressure. Danger of scalding due to steam and hot coolant. –  Always wear safety gloves. –  Always wear safety goggles. –  ...

© 2016-2024 Copyright www.vwgolf.org