Volkswagen Polo Service & Repair Manual: Water Content

Volkswagen Polo Service & Repair Manual / Refrrigerant R134a Servicing / A/C System, General Information / Refrigerant R134a Characteristics / Water Content

Only very small amounts of water are soluble in liquid refrigerant. On the other hand, refrigerant vapor and water vapor mix in any ratio.

Only a small drop of water may get into the refrigerant circuit. The dryer, dryer bag or dryer cartridge contained in the reservoir can absorb approximately 7 grams of water. They are then saturated and cannot absorb any more water. If water is still present in the refrigerant circuit, it flows up to the expansion valve nozzle or restrictor and becomes ice.

The air conditioning system stops cooling.

Water destroys the air conditioner as it combines with other impurities at high pressures and temperatures to form acids.

Combustibility

Refrigerant is non-flammable. It actually has a fire resistant or fire extinguishing effect. Refrigerant decomposes when exposed to flames or red-hot surfaces. UV light (occurring for example during electric welding) also causes refrigerant decomposition. The resultant decomposition products are toxic and are not to be inhaled. However, irritation of the mucous membranes provides an adequate and timely warning.

Commercial Names and Designations

Refrigerant R134a is currently available under the following trade names: H-FKW 134a SUVA 134a ...

Charge Factor

A vessel must have space for vapor as well as liquid. As the temperature rises, the liquid expands. The space filled with vapor decreases. At a certain point, there w ...

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Using the menus in the instrument cluster
Fig. 13 Vehicles without multifunction steering wheel: press button ① in the windscreen wiper lever to confirm the menu point and rocker switch ② to change the menu Fig. 14 Vehicles with multifunction steering wheel: control buttons for menus in the instrument cluster First read and ob ...

Valve, Removing and Installing, Rubber Valve
Make sure wheel rim is clean. – Using the Valve Fitting Tool Valve Fitting Tool -VAS6459--1-, insert a new tire valve. – Remove the valve insert. ...

Seat belt routing
Fig. 52 Correct seat belt routing and head restraint adjustment Fig. 53 Correct seat belt routing during pregnancy First read and observe the introductory information and safety warnings Seat belts only provide an optimum level of protection during an accident when they are routed corre ...