page 63595 ML CRL (S)800-00177AIR CONDITIONER MAINTENANCE CONTINUED...Safety Precautions & Warnings:1) Charging of an air conditioning system should be conducted by a qualifieda/c technician.2) Always wear the proper protective eyewear and clothing before workingon any air conditioning system.3) Always wear work gloves when working with condensers or evaporators.The aluminum edges can be sharp, and cause serious cuts.4) Always use DOT-approved tanks for storing refrigerants.5) Always provide plenty of ventilation when working with refrigerants. Avoidbreathing refrigerant vapor, or lubricant mist.6) Never use compressed air to leak test or pressure test an R134a system.Under certain conditions, pressurized mixtures of R134a and air can becombustible. In addition, shop air injects moisture into the system.7) Always use mineral oil to lubricate O-rings, even on R134a systems.Recommended Tools:1) Safety glasses and work gloves.2) Thermometer3) R134a Refrigerant4) Compressor oil (if needed)5) Mineral oil to lubricate o-rings6) Manifold Gauge Set – similar to RD-5-11104-0P7) Vacuum Pump – similar to RD-5-11118-0P8) Charging Scale – similar to RD-5-11153-0P9) Alternately a Recovery/Charging Station similar to RD-5-11087-0P canbe used instead of items 6, 7 and 8 above.10) Thermistor Vacuum Gauge Sensor – similar to RD-5-11115-0P11) Alternate charging technique- infrared temperature sensorAIR CONDITIONER CHARGING