Risk of explosion caused by welding or soldering work on closed air conditioning system. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with liquid refrigerant. - AS83.00-P-0001-01H

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated areas. Carry out repair work on the air conditioning system circuit only after the system has been drained. 

MODEL 240 

Potential risks 

Risk of explosion 

When closed air conditioning systems (charged or empty) become heated, high pressures are produced that can ultimately cause the system to burst. For this reason, all welding and soldering work  on or near closed air conditioning systems is prohibited.

High pressure levels and a large amount of air can combine with refrigerant vapors to produce an ignitable mixture.

Risk of poisoning 

Refrigerant can decompose when overheated. The resulting substances are toxic and should never be inhaled.

Risk of injury 

Refrigerant vapors are heavier than air; this means that escaping gases pose a risk of suffocation for anyone in a work pit beneath the vehicle.

Contact with liquid refrigerant may cause frostbite-like damage to the skin (due to undercooling).

Safety instructions/precautions 

• All welding and soldering work  on or near closed air conditioning systems is prohibited.
• Never smoke when working with refrigerant, never expose refrigerant to open flames!
• A pungent odor  can indicate overheated refrigerant - these vapors must not be inhaled. Immediately vacate and thoroughly ventilate closed rooms.
• Prior to performing repair work  on the circuit and the components of the air conditioning, always evacuate the refrigerant from the entire system.
• Discharging refrigerant directly into the air is prohibited because it poses a hazard to the atmosphere as well as to personal health and safety.
• Suitable evacuation, treatment and charging devices equipped with integral disposal and treatment facilities must be used for evacuating refrigerant.
• Even after the system has been evacuated, residual pressure may still be present when loosening connectors of the air conditioning system. You should therefore always loosen connectors carefully to allow any accumulated pressure to escape gradually.
• Avoid all contact with liquid refrigerant.
• Always wear safety glasses and protective gloves when working with refrigerant.

First aid measures 

In case of contact with eyes

• Immediately flush with plenty of running water and consult a physician.

In case of contact with skin

• Consult a physician immediately in case of frostbite.

In case of inhalation

• of highly concentrated refrigerant vapors, immediately take affected person out into the fresh air and keep him calm.
• If his/her breathing is shallow, or the individual has stopped breathing altogether, tilt the head back and administer artificial resuscitation. Call a doctor.

In case of ingestion

• Consult a physician immediately.