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:

Silicone Remover, Long -LLS MAX 008
Definition: Silicone Remover, Long -LLS MAX 008- Edition 10/2008 Product Description The Silicone Remover, Long -LLS MAX 008- is a cleaning agent that is rich in active ingre ...

Two-Part VHS Hardener and Two-Part VHS Performance Hardener
Definition: Two-Part VHS Hardener -LHA 009 051 A2-/-LVM 009 051 A5- Two-Part VHS Hardener, Short -LHA 009 050 A2- Two-Part VHS Hardener, Long -LHA 009 052 A2-/-LHA 009 052 A3- ...

Introduction
The purpose of this Repair Manual is to provide foremen and mechanics with the basic knowledge needed to ensure expert working. Note Expert knowledge is achieved by one who has taken part successfully in instructiona ...