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:

Bonding Agent
Definition: Bonding Agent -LLS MAX 015-, plastic Edition 10/2012 Product Description The Bonding Agent -LLS MAX 015- is a universal single-component bonding agent for all sta ...

Changing engine oil
First read and observe the introductory information and safety warningsThe engine oil must be changed regularly in accordance with the data given in the service schedule. The engine oil and filter should always be changed, and used oil disposed of, by a qualified workshop due to the special ...

Checklist
To ensure your own safety and that of your passengers, observe the following actions in the specified order : Find a firm and level surface suitable for lifting the vehicle. Stop the engine, select a gear on a manual gearbox or in case of automatic gearbox, move the selector lever ...