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

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Other materials:

Folding the seat cushion and backrests on the rear bench seat forwards and backwards
Fig. 82 Rear bench seat: folding the rear seat cushion forwards Fig. 83 Rear bench seat: release button ①, red marking ② or release button ③ First read and observe the introductory information and safety warnings The rear seat cushions and backrests can be folded forward to extend t ...

Engine Cooling
Because towing places higher demands on the engine cooling system, the cooling system is enhanced in vehicles that have factory-installed trailer hitches, if necessary. This is done by installing a stronger or a second coolant fan and/or a larger radiato ...

Stowage compartments in the front centre console
Fig. 94 In the centre console: stowage compartment at the front Fig. 95 In the centre console: stowage compartment next to the handbrake lever First read and observe the introductory information and safety warnings There is an open stowage compartment with lighting in the front centre con ...