Safety Precautions

CAUTION:
^ R-12 and R-134a components are not interchangeable. Using R-12 components, refrigerant or refrigerant oil on an R-134a system will cause damage to the A/C system. Do not replace components, refrigerant, or refrigerant oil from an R-134a system with components, refrigerant, or refrigerant oil for an R-12 system or vice versa.
^ The refrigerant used in this refrigerant system is HFC-134a (Tetrafluoroethane) which is a hydrofluorocarbon refrigerant. HFC-134a, also known as R-134a, is non-corrosive, non-explosive, non-flammable and has a slight, ethereal type odor. HFC-134a is heavier than air. Although it is classified as a safe refrigerant, certain precautions must be observed to protect the parts involved and the person working on the unit.
^ Use only HFC-134a refrigerant. Due to environmental concerns, when the air conditioning system is drained, the refrigerant must be collected using refrigerant recovery/recycling equipment meeting SAE J1990 and J2210 standards. HFC-134a must never be removed without the appropriate equipment or released into the atmosphere. Use of a recovery machine dedicated for R-134a is necessary to reduce the possibility of oil and refrigerant incompatibility concerns. Refer to the instructions provided by the equipment manufacturer when removing refrigerant from or charging the air conditioning system.
^ Ensure that containers are never heated to over 52°C (125°F). Containers should be stored and installed in accordance with all state and local ordinances.
^ When admitting HFC-134a into the refrigerant system, always keep the tank in an upright position. If the tank is on its side or upside down, liquid HFC-134a will enter the system and may damage the compressor.
^ Refrigerant HFC-134a should not be mixed with air for leak testing or used with air for any other purpose above atmospheric pressure. HFC-134a is combustible when mixed with high concentrations of air and high pressures.
^ Whenever components in the engine compartment or instrument panel areas are being serviced, the battery ground cable must be disconnected to eliminate the possibility of electrical shorts, burnt wiring, and dangerous fires. Extreme care must be exercised when performing electrical tests where the battery must be connected to operate the system.