10. A/C and Safety System 10-3 A/C system A/C system 10.1 Cooling system 10.1.1 Warnings and precautions Warning! – Refrigerant-related work shall be carried out in a well-ventilated environment to avoid inhaling refrigerant vapors. You shall avoid inhaling A/C refrigerant R-134a (tetrafluoroethane) and lubricating oil vapors or mists. Contact with them can irritate your eyes, nose and throat. When recovering A/C refrigerant R-134a from the A/C system, use certified service equipment (R-134a regeneration equipment) that meets the requirements. In the event of an accidental discharge of the system, the work area must be ventilated before the service continues.
– It is necessary to disconnect the negative terminal of the battery before servicing the electrical system. Never perform welding or steam cleaning on or near the vehicles with A/C pipelines or assembly. Precautions for A/C refrigerants Warning! – Skin contact may cause frostbite. – Wear suitable goggles and protective gloves when working. Actions to avoid with A/C refrigerants Warning! – Do not store the refrigerant in places exposed to sunlight or sources of heat. – When filling, do not hold the refrigerant bottles upright and keep their valves facing down. – Do not expose the refrigerant bottle to frost and snow. – Do not drop the refrigerant bottle.
– Do not discharge the refrigerant directly into the atmosphere in any case. – Do not mix refrigerants such as R134a (tetrafluoroethane) and R12 (difluorodichloromethane). Precautions on compressor lubricating oil Warning! – It is necessary to use compressor lubricating oil of the specified type and brand, and the compressor lubricating oil of different types and brands must not be mixed, otherwise the compressor will be damaged. – Compressor lubricating oil is very easy to absorb water, so try to minimize the exposure time of the compressor lubricating oil to air as much as possible. Warning! – Never use water, corrosive solvents or flammable and explosive solvents to clean the A/C system.
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