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. ...

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Checklist
The following actions must always be carried out in the given order in preparation for changing the wheel : In the event of a flat tyre, park your vehicle on a firm and level surface at a safe distance from the flow of traffic. Apply the handbrake firmly Braking, stopping an ...

Changing bulbs in the front bumper
Fig. 182 In the front bumper, right-hand side: removing the cover and headlight Fig. 183 In the front bumper, right-hand side: removing the cover and headlight First read and observe the introductory information and safety warnings The actions should onl ...

Cleaning and caring for chrome and aluminium trim parts
First read and observe the introductory information and safety warnings Use a damp, clean, lint-free and soft cloth to clean the surfaces. For heavy soiling use a special solvent-free cleaning product. Polish the chrome and aluminium trim parts using a soft, dry cloth. NOTICE ...