Volkswagen Polo Service & Repair Manual: Welding and Soldering on Refrigeration Systems
Before performing welding or soldering work on vehicles near
the air conditioning system components, extract the refrigerant
and remove the residue by flushing with compressed air and
nitrogen. |
The products of refrigerant decomposition due to the effect
of heat are not only toxic, but may also have a highly corrosive
effect on pipes and system components. They mainly take the form
of hydrogen fluoride. |
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Pungent Odor
A pungent odor indicates that the products of decomposition mentioned above
have already formed. Avoid inhaling these substances under all circumstances, as
otherwise the respiratory system, lungs and other organs could be damaged.
First Aid
Following contact with eyes or mucous membranes, immediately
rinse with copious amounts of running water and consult an eye
specialist. |
Following contact with the skin, immediately remove affected
clothing and rinse skin with copious amounts of water. |
Following inhalation of highly concentrated refrigerant
vapors, immediately take the affected person into the open air.
Call a doctor. Administer oxygen in the event of breathing
difficulties. If the affected person has difficulty breathing or
cannot breathe, tip head back and perform mouth to mouth
respiration. |
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Refrigerants used in motor vehicle air conditioning systems
belong to the new generation of refrigerants based on
chlorine-free, partially fluorinated hydrocarbons (H ...
Secure vessels to prevent them falling over!
Secure upright cylinders to stop them falling over and
cylinders lying flat to stop them rolling away.
...
Other materials:
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 car ...
Diesel particulate filter
First read and observe the introductory information
and safety warningsThe diesel particulate filter filters out soot particles
in the exhaust gas. The soot particles gather in the filter and are burnt under
high temperatures periodically (regeneration). Heat produced can
warm the engine.
...
Driving with an automatic gearbox
First read and observe the introductory information
and safety warnings The gearbox changes the forward gears up
and down automatically.
Driving down hills
The steeper the gradient, the lower the gear you will need. Lower gears increase
the braking effect of the engine. Never allow the veh ...
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