Technician Safety Information

WARNING: Always wear safety goggles when charging or discharging system.
Be sure work area is well ventilated. R-12 is heavier than air and can accumulate in areas of poor air circulation.
Avoid inhaling fumes when using flame-type leak detector. R-1 2 becomes poisonous gas after coming into contact with open flame

CAUTION: Always discharge refrigerant from air conditioner system before loosening connections, hoses, etc.

CAUTION: Discharge refrigerant from system when it is necessary to weld near refrigerant hoses with arc or resistance welding systems. During electrical welding process invisible ultraviolet rays are given oft which penetrate refrigerant hoses and decompose refrigerant

Note: Plug all openings in system when removing/replacing parts. This prevents entry of dirt and moisture which may foul system.
Drops of moisture may cause expansion valve to ice up, blocking refrigerant flow and stopping cooling action