VW Golf manuals

Volkswagen Golf Service & Repair Manual: Water content

Only very small amounts of water are soluble in liquid refrigerant. On the other hand, refrigerant vapour and water vapour mix in any proportion.
Any water present in the refrigerant circuit will be carried along as droplets. The dessicant, dessicant bag or dessicant cartridge in the receiver or reservoir are capable of holding approx. 7 grams of water before they are full and cannot absorb any more water. If there is further water in the circuit, it will flow to the expansion valve jet or to the restrictor and becomes ice.
The air conditioning system will stop cooling.
Water destroys the air conditioner because at high pressures and temperatures it combines with other impurities to form acids.
   
Combustibility
Refrigerant is non-flammable. On the contrary, it has a fire-inhibiting or fire-extinguishing effect. Refrigerant decomposes when exposed to flames or incandescent surfaces. UV light can also decompose refrigerants (UV is emitted by electric arc welding). Products of this decomposition are poisonous and must not be inhaled. However, these chemicals irritate the mucous membranes, giving adequate warning of their presence.
   
Effects on metal
In its pure state, refrigerant R134a is chemically stable and does not attack iron or aluminium. However, impurities such as chlorine compounds in th ...

Charge factor
There must be space both for liquid and vapour in a container. As the temperature rises, the liquid expands. The space occupied by the vapour becomes smaller. Eventua ...

Other materials:

Towing a trailer
First read and observe the introductory information and safety warnings Headlight adjustment Towing a trailer can raise the front end of the vehicle enough for the dipped beam to blind other road users. Use the headlight range control to lower the light cone as required. If you do not have ...

Removing and installing intermediate padding, backrest with through-loading aperture
Removing –  Fold down lid for through-loading aperture. –  Release locking lugs -1- using a screwdriver and at the same time push down intermediate padding -2- as far as stop -arrow A-. ...

Test prerequisites
Check wheel suspension, wheel bearing assembly and steering for excessive play and damage. Tread depth difference of no more than 2 mm on one axle. Tyres inflated to correct pressures. ...

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