Volkswagen Golf Service & Repair Manual: Refrigerant circuit with expansion valve
| A- low-pressure side of the refrigerant circuit. |
| B- high-pressure side of the refrigerant circuit. |
|
Component |
Overall
state of the refrigerant |
Pressure (in bar) |
Temperature
in degrees Celsius |
| -1-
evaporator, from inlet to outlet |
Vapour |
approx. 1.2 bar
→ Remark |
approx. -7°C
→ Remark |
| |
|
(approx. 1.8 bar)
→ Remark |
approx. -1°C
→ Remark |
| -2-
Air conditioning system compressor A-side |
Gas |
approx. 1.2 bar
→ Remark |
approx. -1°C |
| |
|
(approx. 1.8 bar)
→ Remark |
(approx. +1°C)
→ Remark |
| -3-
Air conditioning system compressor B-side |
Gas |
approx. 14 bar |
approx. +65°C |
| -4-
Condenser |
Gas, vapour, liquid |
approx. 14 bar |
at outlet approx. + 55°C |
| -5-
Receiver |
Liquid |
approx. 14 bar |
approx. +55°C |
| -6-
Extraction and charging valve, B side |
Liquid |
approx. 14 bar |
approx. +55°C |
| -7-Expansion
valve |
Liquid, released into
vapour |
approx. 14 bar |
approx. +55°C, reduced to -7°C |
| -8-
Extraction and charging valve, A side |
Gas |
approx. 1.2 bar
→ Remark |
approx. -7°C
→ Remark |
| |
|
(approx. 1.8 bar)
→ Remark |
approx. -1°C
→ Remark |
| 1) |
The pressure in refrigerant circuits with regulating air
conditioner compressor is held to approx. 2 bar despite changing heat
transport and differing engine speeds. This applies however only within
the rated range of the air conditioner compressor; if the rated range of
the air conditioner compressor is exceeded, the pressure will increase
→ Chapter. |
| 2) |
The temperature in refrigerant circuits with regulating
air conditioner compressor is held within the regulation range of the
air conditioner compressor despite changing heat transport and differing
engine speeds. This applies however only within the rated range of the
air conditioner compressor; if the rated range of the air conditioner
compressor is exceeded, the temperature will increase.
→ Chapter |
| 3) |
Measured values for air conditioning systems with two
evaporators |
 Note
| Air conditioning system compressors that do not
self-regulate their load are switched off by the respective
control unit via the air conditioner compressor regulating valve
-N280- when an evaporator temperature less than 0°C is sensed. |
| In vehicles with air conditioner compressor regulating valve
-N280-, the pressure on the low-pressure side is varied by
activating the valve. |
|
|
|
WARNING
When working on the refrigerant circuit, observe
generally applicable safety rules and the Regulations
for ...
Arrows show the direction of refrigerant flow.
A- low-pressure side of the refrigerant circuit.
B- high-pressure side of the refrigerant circuit.
...
Other materials:
Secondary locking element
The secondary locking mechanism is a housing catch (second
line locking mechanism) that secures all the wires in one
contact housing. If a secondary locking mechanism is fitted to a
contact housing, this must always be opened or removed using the
appropr ...
Belt height adjuster
Fig. 68 Next to the front seats: belt height
adjuster
First read and observe the introductory information
and safety warnings The seat belt height adjusters for the front seats can
be used to adjust the position of the seat belt on the shoulder so that it can be
fastened properly:
P ...
Removing and installing inner door cover
Special tools and workshop equipment
required
Note
Removal and installation are described only for the left
cover. The right side is similar.
Removing
...
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Pressures and temperatures in the refrigerant circuit
Refrigerant circuit with restrictor and reservoir