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:

Blender
Definition: Blender -LLS MAX 009- Edition 10/2008 Product Description The Blender -LLS MAX 009- matches the overlapping areas or the edges from the existing paint to the new ...

Lifting the vehicle with the jack
Fig. 168 Jacking points for the vehicle jack (mirrored on the right-hand side of the vehicle) Fig. 169 Vehicle jack at the rear left-hand side of the vehicle First read and observe the introductory information and safety warnings The jack may be applied only at the jacking points shown (m ...

Rear view
Fig. 3 Overview of the rear of the vehicle Key for : Roof aerial High-mounted brake light Rear window Rear window heating Window aerial Rear window wiper Volkswagen badge, used for opening the tailgate Tail light cluster Number plate lights ...