Volkswagen Polo Service & Repair Manual: Welding and Soldering on Refrigeration Systems

Volkswagen Polo Service & Repair Manual / Refrrigerant R134a Servicing / A/C System, General Information / Safety Precautions / 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.

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.

Product Characteristics

Refrigerants used in motor vehicle air conditioning systems belong to the new generation of refrigerants based on chlorine-free, partially fluorinated hydrocarbons (H ...

Handling Pressure Vessels

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:

Controls for the heating and fresh air system
Fig. 127 In the centre console: rotary controller of the heating and fresh air system with controls First read and observe the introductory information and safety warnings Button, control Additional information. Heating and fresh air system ...

Corrugated Tube, Repairing
Special tools and workshop equipment required Hot Air Blower -VAS5179- or Hot Air Blower -VAG1416/- or Wiring Harness Repair Set - Hot Air Blower -VAS1978/14A- A ...

What happens to vehicle occupants who have not fastened their seat belts
Fig. 47 An unbelted driver is thrown forwards Fig. 48 The unbelted rear passenger is thrown forwards, hitting the belted driver First read and observe the introductory information and safety warnings Many people believe that they can brace their weight with their hands in a minor collisi ...