Volkswagen Polo Service & Repair Manual: Pressure Relief Valve

Volkswagen Polo Service & Repair Manual / Refrrigerant R134a Servicing / Refrigerant Circuit General Information / Refrigerant Circuit Components / Pressure Relief Valve

Caution

Non-approved tools or materials such as leak sealing additives can cause damage or malfunctions in the system.

Only use tools and materials approved by the manufacturer.

The warranty is voided if non-approved tools or materials are used.

All components of the refrigerant circuit submitted for quality observation are always to be sealed (use original sealing caps of original part).

Replace damaged or leaking components of refrigerant circuit. Refer to → Chapter „Components, Replacing“.

To date, the original parts (compressor, reservoir, receiver/dryer, evaporator and condenser) have been filled with nitrogen gas. This charge is being gradually discontinued. There is little or no pressure equalization when removing the sealing plugs from the original part.

The pressure relief valve is installed on the A/C compressor or receiver/dryer.

At a pressure of approximately 38 bar (551 psi) positive pressure, valve opens and closes again once pressure has dissipated (approximately 30 bar (435 psi)).

Refrigerant does not escape completely.

Depending on the version, a transparent plastic disc may be installed which breaks off as soon as the valve is activated.

Pressure Relief Valve

Refrigerant Circuit Pipes and Hoses

Caution Non-approved tools or materials such as leak sealing additives can cause damage or malfunctions in the sys ...

Refrigerant Circuit Design

...

Other materials:

Handbrake
Fig. 115 Handbrake between the front seats First read and observe the introductory information and safety warnings Applying the handbrake Lift the handbrake lever up fully. The handbrake is applied when the indicator lamp lights up in the instrument cluster . Releasing ...

Electronic immobilizer
First read and observe the introductory information and safety warnings The immobilizer helps to prevent the engine from being started and driven with an unauthorised vehicle key. There is a chip in the key. It automatically deactivates the immobilizer when the vehicle key is inserted into ...

Preserving Wax
Definition: Preserving Wax -AKR 321 M15 4- Preserving Wax -AKR 321 M16 10- Edition 04/2009 Product Description Preserving Wax -AKR 321 M15 4- and Prese ...