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:

Various securing systems
Fig. 62 On the rear seats: figure Ⓐ illustrates the main securing points for the child restraint system on the lower retaining rings and top tether. Figure Ⓑ shows how to secure a child restraint system using the vehicle's seat belt First read and observe the introductory information a ...

Exterior Lights, Switches
HID Headlamp Usage and Safety Precautions Special tools and workshop equipment required Protective Eyewear Gloves – Note the following if working with HID headlamps: ...

Introduction
This chapter contains information on the following subjects: → Warning and indicator lamps → Handbrake → Parking → Information on the brakes → Brake support systems → Switching the TCS on and off → Brake flu ...