VW Polo manuals

Volkswagen Polo Service & Repair Manual: 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 ...

Other materials:

Handling wheels and tyres
Fig. 145 Diagram showing how to swap wheels First read and observe the introductory information and safety warningsThe tyres are the most used and most underestimated parts of a vehicle. Tyres are very important as the narrow tyre surfaces are the only contact between the vehicle and the ro ...

General Information
  WARNING Risk of injury. Read and follow the Safety Precautions when working with batteries. Refer to → Chapter „Warnings and Safety Precautions“. ...

Warning lamp and coolant temperature display
Fig. 138 Coolant temperature display in instrument cluster: Ⓐ cold; Ⓑ normal; Ⓒ warning First read and observe the introductory information and safety warningsA display for the coolant temperature may be, depending on the vehicle equipment, located in instrument cluster. In normal driv ...

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