Volkswagen Golf Service & Repair Manual: Refrigerant circuit with restrictor and reservoir
| Arrows show the direction of refrigerant flow. |
| 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-
Air conditioning system compressor B-side |
Gas |
up to 20 bar |
to +70°C |
| -2-
Condenser |
from gas through vapour
to liquid |
up to 20 bar |
to +70°C |
| -3-
Restrictor |
from liquid to vapour |
B-side up to 20 bar,
A-side greater than 1.5 bar |
B-side up to +60°C, A-side
warmer than -4°C |
| -4-
Evaporator |
from vapour to gas |
greater than 1.5 bar |
warmer than -4°C |
| -5-
Reservoir |
Gas |
|
|
| -6-
Air conditioning system compressor A-side |
Gas |
|
|
| The pressures on the A-side are held at approx. 2 bar by the
“regulating” air conditioner compressor even at 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. |
Note
| In vehicles with air conditioner compressor regulating valve -N280-,
the pressure on the low-pressure side is varied by activating the valve. |
A- low-pressure side of the refrigerant circuit.
B- high-pressure side of the refrigerant circuit.
...
Displays on the pressure gauge
1 -
Temperature scale for refrigerant R134a CF3–CH2F or
CH2F–CF3.
2 -& ...
Other materials:
Renewing air conditioner compressor
Note
On vehicles equipped with an electrical air conditioner
compressor, de-energise the high-voltage system before removing
the air conditioner compressor.
→ Electric drive; Rep. gr.93
...
Removing and installing fresh air blower -V2-, LHD vehicles
Note
If only the fresh air blower -V2- is defective, remove and
install fresh air blower control unit -J126-
→ Chapter.
Removing
Fresh air blower -V2- is accessible from footwell on front
...
Subsequent bleeding of hydraulic system
Note
Carry out subsequent bleeding when:
brake pedal travel is too long or so-called
»soft brake pedal«
Subsequent bleeding requires the assistance of a second
mechanic.
–&n ...
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Refrigerant circuit with expansion valve
Test and measurement work that can be performed using a pressure gauge