VW Golf manuals

Volkswagen Golf Service & Repair Manual: Handling refrigerants

  WARNING
Danger of freezing injuries.
The refrigerant can emerge as liquid or as vapour.
Do not open containers in which this refrigerant is present.
If refrigerant containers are opened, the contents may escape in liquid or vapour form. The higher the pressure in the container, the more energetic the emergence will be.
How high the pressure is depends on two factors:
What type of refrigerant is in the container. “This is because the lower the boiling point, the higher the pressure.”
How high the temperature is. “This is because the higher the temperature, the higher the pressure.”
   

Wear protective glasses

Put on protective glasses. This will prevent the refrigerant entering the eyes, which in certain circumstances can cause severe injury due to frostbite.

Wear protective gloves and apron

Refrigerants dissolve fats and oils very well. Therefore, when they come in contact with the skin, they take away the protective layer of fat. Skin from which the natural oil and fat have been removed is vulnerable to cold and germs.
   
Do not allow liquid refrigerant to come in contact with the skin

The refrigerant will draw its latent heat of evaporation from its surroundings. That can be your skin. This can result in very low temperatures. The result is local frostbite (boiling point of R134a is -26.5°C at normal atmospheric pressure).

Do not breath in refrigerant vapour

  Note
In high concentrations, emerging refrigerant vapours can mix with the air and displace the oxygen necessary for breathing.
Absolutely NO SMOKING
Refrigerant can decompose in a burning cigarette. The resulting substances are poisonous and must not be breathed in.
Product characteristics
Refrigerants used in car air conditioning systems belong to the new generation of refrigerants, the chlorine-free, partially-fluoridated hydrocarbons (H-CFC, R134a). ...

Welding and soldering on refrigeration systems
Before welding and brazing on vehicles (in the vicinity of the air conditioning system components), extract the refrigerant and then purge the system by blowing throu ...

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