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:

Supplementary heating mode
Once the coolant temperature has reached approx. 84 °C, the control unit switches to energy-saving control mode. If the coolant temperature continues to rise above approx. 88 °C, the control unit switches to the controlled waiting period. If t ...

Introduction
This chapter contains information on the following subjects: → Handling seat covers → Cleaning cloth seat covers, fabric trim and Alcantara upholstery → Cleaning and caring for natural leather covers → Cleaning leatherette upholstery → C ...

Safety measures when working with pyrotechnic components
Safety measures when working with pyrotechnic components Note The following are pyrotechnic components: Airbag units Belt tensioner ...