Volkswagen Polo Service & Repair Manual: Restrictor

Volkswagen Polo Service & Repair Manual / Refrrigerant R134a Servicing / Refrigerant Circuit General Information / Refrigerant Circuit Components / Restrictor

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 restrictor creates a constriction. This restriction reduces the flow and creates high and low pressure sides in the refrigerant circuit. Before the restrictor the refrigerant which is under a higher pressure is warm. After the restrictor the refrigerant which is under a low pressure is cold. Before the restriction there is a strainer for contaminants and after the restriction there is a strainer, to atomize the refrigerant before it reaches the evaporator.

Note

Arrow -A- on restrictor points to evaporator.

Replace after each opening of the circuit.

Note different versions.

Refer to → Rep. Gr.87.

Refer to the Parts Catalog.

Restrictor

Reservoir

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

Receiver/Dryer

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

Other materials:

Leaks or Internal Damage, for Example Noises or No Output
Note For vehicles with an electrically-driven A/C compressor, de-energize the high voltage system before removing the A/C compressor. Refer to → Electrical System Hybrid; Rep. Gr.93. – Dischar ...

General Information
The following descriptions also apply to Left Rear Cigarette Lighter -U3-, Right Rear Cigarette Lighter -U7-, Rear Cigarette Lighter -U9-, 12 V Socket 2 -U18-, 12 V Socket 3 -U19-, 12 V Socket 4 -U20-, Cigarette Lighter 2 -U25- and 12 V Socket 5 -U26- if ...

Handling Pressure Vessels
Secure vessels to prevent them falling over! Secure upright cylinders to stop them falling over and cylinders lying flat to stop them rolling away. Do not throw vessels! If dropped, the vessels cou ...