VW Polo manuals

Volkswagen Polo Service & Repair Manual: Refrigerant Circuit Pressures and Temperatures

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.
Refer to → Rep. Gr.87.
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“.
Evaporator Vent Temperature Sensor -G263- or Evaporator Temperature Sensor -G308
Function: The Evaporator Vent Temperature Sensor -G263- or Evaporator Temperature Sensor -G308- determines the temperature behind the evaporato ...

Refrigerant Circuit with Expansion Valve
A-Low pressure side of refrigerant circuit. B-High pressure side of refrigerant circuit.         Component ...

Other materials:

Battery with Visual Indicator, Enhanced
This is a maintenance-free battery with liquid electrolyte (wet battery).   Caution Do not remove any of the labels on the battery and do not add distilled water. Only perform a visual ...

Fig. 17 Dimensions First read and observe the introductory information and safety warnings The data in the table apply to the most basic German model. The specified values can vary due to different tyre and wheel sizes, if additional equipment is fitted, for different model versions, for ret ...

A/C Compressor with A/C clutch
  Caution Non-approved tools or materials such as leak sealing additives can cause damage or malfunctions in the system. Only use tools and materials approved by the manufactu ...

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