Volkswagen Polo Service & Repair Manual: Refrigerant Circuit Pressures and Temperatures
WARNING
| When performing work on refrigerant circuit, observe
all generally applicable safety precautions and pressure
vessel regulations. |
|
| The pressures and temperatures in the refrigerant circuit
depend on the current operating conditions (such as engine RPM,
coolant fan level 1, 2 or 3, engine temperature, A/C compressor
on or off) as well as on the effects of outside influences (such
as outside temperature, humidity, desired cooling output). |
| In vehicles with A/C Compressor Regulator Valve -N280-, the
pressure is modified on the low pressure side by the valve. |
| For this reason, values indicated in the following table are
valid only as reference points. They are attained at an engine
speed of 1,500 to 2,000 RPM and an ambient temperature of 20 °C
(68 °F) after about 20 minutes. |
| The connections provided for measuring pressure for the
manometer battery are located in the vehicle-specific
refrigerant circuit. |
| At 20 °C (68 °F) with the engine not running, the pressure
in the refrigerant circuit is 4.7 bar (68.17 psi). Refer to
→ Chapter „Refrigerant R134a Vapor Pressure Table“. |
|
|
|
Function:
The Evaporator Vent Temperature Sensor -G263- or Evaporator
Temperature Sensor -G308- determines the temperature behind the
evaporato ...
A-Low pressure side of refrigerant circuit.
B-High pressure side of refrigerant circuit.
Component
...
Other materials:
Accessories and parts
First read and observe the introductory information
and safety warningsVolkswagen recommends that you seek advice from a Volkswagen
dealership before purchasing accessories, spare parts or service fluids. For example,
if the vehicle is to be retrofitted with accessories or if parts have to be ...
Special Tools
Special tools and workshop equipment
required
Battery Charger -VAS5903-
Battery Tester -VAS6161-
...
Radio reception and aerials
First read and observe the introductory information
and safety warningsFor factory-fitted radio or navigation systems, the aerial
for radio reception can be installed in various locations in the vehicle:
On the inside of the rear window, together with the rear window heating.
On the i ...
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Evaporator Vent Temperature Sensor -G263- or Evaporator Temperature Sensor
-G308
Refrigerant Circuit with Expansion Valve