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. |
|
| Refrigerant can decompose in a burning cigarette. The
resulting substances are poisonous and must not be breathed in. |
|
Refrigerants used in car air conditioning systems belong to
the new generation of refrigerants, the chlorine-free,
partially-fluoridated hydrocarbons (H-CFC, R134a).
...
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 ...
Other materials:
Function and operation by the user
Fig. 179 In the instrument cluster display:
Driver Alert System
First read and observe the introductory information
and safety warnings The Driver Alert System determines the driving behaviour
at the beginning of a journey and uses it to evaluate the tiredness of the driver.
This is comp ...
Repairing run-flat tyres, PAX
General information
It is not always necessary to renew a tyre after it has lost
pressure and then been run in an uninflated condition.
Note
The affected tyre should be removed and checked for damage
by qu ...
Spraying the evaporator with the suction feed spray-gun -V.A.G 1538- and
spray lance
Spray the evaporator with Contra Sept directly using a spray
lance (approx. 10 bar). Contra Sept neutralises microbes and
bacteria directly at the evaporator.
In order to enable access to the evaporator, some
preliminary work and differe ...
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Product characteristics
Welding and soldering on refrigeration systems