Volkswagen Golf Service & Repair Manual: Pipes and hoses in refrigerant circuit

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / General information on refrigerant circuit / Refrigerant circuit components / Pipes and hoses in refrigerant circuit

The mixture of refrigerant oil and refrigerant R134a attacks certain metals (e.g. copper) and alloys and dissolves certain hose materials. Therefore, always use genuine replacement parts.

The hoses and pipes are held together with screwed joints or special push-fit joints.

Note

When assembling screwed joints, be careful to comply with the prescribed torques, and when working on push-fit joints, be careful to use the disconnection tools provided.

O-ring

These O-rings seal the joints between the individual components of the refrigerant circuit. Use only seals that are resistant to refrigerant R134a an ...

High-pressure safety valve

The high-pressure safety valve is fitted to the air conditioner compressor or the receiver. The valve opens at a pressure above approx. 38 bar and ...

Other materials:

Matting additive -ALN 775 106-
Designation: Matting additive -ALN 775 106- Issued 04.2013 Product description The matting additive -ALN 775 106- is an additive for 2-pack HS top coats which produces a matt ...

Assembly overview - auxiliary heater attachments
1 - Auxiliary heater 2 - Clamping piece 3 - Coolant hose 4 - Air intake silencer Removing and installing → Chapter 5 - Bracket for ci ...

Refrigerant circuit with expansion valve
A- low-pressure side of the refrigerant circuit. B- high-pressure side of the refrigerant circuit. Component Overall state of the refrigerant Pressure (in bar) Temperature in deg ...