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

Volkswagen Polo Service & Repair Manual / Refrrigerant R134a Servicing / Refrigerant Circuit General Information / 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.

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:

Wheel bolt caps
Fig. 165 Removing the wheel bolt caps First read and observe the introductory information and safety warnings Take the wire hook from the vehicle toolkit . Insert the hook through the opening in the cap and pull off in the direction of the arrow. The caps protect the wheel b ...

Hub Cap for Alloy Wheels with Open Threaded Connection, Removing and Installing
Removing The wheel is removed. Note Hold the cap secure -1- with the hammer. Installing ...

Using a mobile telephone in the vehicle without a connection to the external aerial
First read and observe the introductory information and safety warningsBoth during telephone calls and in standby mode, mobile telephones transmit and receive radio waves, which may also be termed "high-frequency energy". Current scientific literature warns us that radio waves can be harmful ...