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 ...

Other materials:

Overview - Cigarette Lighter -U1-
Caution Using force to remove cigarette lighter sockets without illumination can result in damage to the mounting sleeve retainers. The Cigarette Lighter Release Tool -T40148- can o ...

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 ...

Fitting the front towing eye
Fig. 193 In bumper at front right: depiction of variants for screwing in towing eye First read and observe the introductory information and safety warnings The towing eye is screwed into a threaded hole behind a cover on the right of the front bumper . The towing eye must always be kept i ...