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. |
| At 20°C and with the engine stopped, the refrigerant circuit
will adjust itself to a pressure of 4.7 bar positive pressure
→ Chapter. |
|
|
|
Function:
The evaporator output temperature sender -G263- or
evaporator temperature sensor -G308- reads the temperature
downstream from the eva ...
A- low-pressure side of the refrigerant circuit.
B- high-pressure side of the refrigerant circuit.
...
Other materials:
Removing and installing fuel delivery unit/fuel gauge sender, vehicles with
four-wheel drive
Special tools and workshop equipment
required
Special wrench -T10202-
Removal wedge -3409-
Removing
...
Evaporator
The liquid refrigerant evaporates in the tubes of the
evaporator. The latent heat of evaporation is taken from the air
streaming past the evaporator fins. The air cools. The
refrigerant evaporates and is drawn into the air conditioning
system compressor ...
Stopping the engine
First read and observe the introductory information
and safety warnings
The actions should only be carried out in the specified order.
Step
Vehicles without Keyless Access
Vehicles with Keyless Access
1.
The vehicle must b ...
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Evaporator output temperature sender -G263- or evaporator temperature sensor
-G308
Refrigerant circuit with expansion valve