Volkswagen Polo Service & Repair Manual: Refrigerant Circuit with Restrictor and Reservoir
| Arrows point in direction of refrigerant flow. |
| A-Low pressure side of refrigerant circuit. |
| B-High pressure side of refrigerant circuit. |
|
Component |
Aggregate state of refrigerant |
Pressure bar (psi) positive pressure |
Temperature
in degrees Celsius (Fahrenheit) |
| -1-
A/C compressor B-side |
Gas |
up to 20 (290 psi) |
up to 70 (158) |
| -2-
Condenser |
From gas to vapor to
fluid |
up to 20 (290 psi) |
up to 70 (158) |
| -3-
Restrictor |
From fluid to vapor |
B-side to 20 (290 psi),
A-side greater than 1.5 (21.8 psi) |
B-side up to 60 (140 psi),
A-side warmer than -4 (25) |
| -4-
Evaporator |
From vapor to gas |
Greater than 1.5 (21.8
psi) |
Warmer than -4 (25) |
| -5-
Reservoir |
Gas |
|
|
| -6-
A/C compressor A-side |
Gas |
|
|
| Pressures on A-side are maintained at approximately 2 bar (29 psi)
by “regulating” A/C compressor also at various engine speeds. However,
this applies only within the performance range of the A/C compressor; if
the performance limits of the A/C compressor are exceeded. Refer to
→ Chapter „Pressures, Checking“. |
Note
| In vehicles with A/C Compressor Regulator Valve -N280-, the pressure
is modified on the low pressure side by the valve. |
A-Low pressure side of refrigerant circuit.
B-High pressure side of refrigerant circuit.
Component
...
Indicators on pressure gauge
1 -
Temperature scale for refrigerant R134a CF3–CH2F or
CH2F–CF3.
2 -&nb ...
Other materials:
Stowage compartments in the front centre console
Fig. 94 In the centre console: stowage
compartment at the front
Fig. 95 In the centre console: stowage
compartment next to the handbrake lever
First read and observe the introductory information
and safety warnings
There is an open stowage compartment with lighting in the front centre con ...
Refrigerant Circuit, Flushing
Note
For vehicles in which no adapters fit on to the refrigerant
pipes, for example, a blower pistol with rubber mouthpiece is to
be used to blow through individual components. Special care must
be taken not to damage the connections (crus ...
Information stored in the control units
First read and observe the introductory information
and safety warningsYour vehicle is factory fitted with electronic control
units which are responsible for engine and gearbox management. The control units
also monitor the function of the exhaust system and the airbags.
These electronic con ...
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