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:
Permitted Tread Depth - Variance
For all four wheels use only tires of the same construction
type, and tread.
Always use tires with the deepest tread depth on the front
axle.
Replacing one individual tire is always possible. The
vehicl ...
Tire Pressure Monitoring Sensor without Metal Valve, Removing and
Installing, Service Version
Special tools and workshop equipment
required
Torque Wrench -VAG1410-
Perform the Following:
Removing
–
Remove the tire from the disc wheel. Refer to
͛ ...
Warning and indicator lamps
First read and observe the introductory information
and safety warnings Depending ont eh vehicle equipment scope,
an electrohydraulic or an electromechanic steering system may be fitted.
Lit up
Possible cause
Solution
Electrohy ...
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Refrigerant Circuit with Expansion Valve
Pressure Gauge, Tests and Measurements