A/C System Cautions

Protective goggles should be worn when opening any refrigerant lines. A bottle of sterile mineral oil and a quantity of weak boric acid solution must always be kept nearby when servicing air conditioning system. If liquid refrigerant does touch eyes, immediately use a few drops of sterile mineral oil to wash them out, then wash eyes clean with weak boric acid solution. Seek a doctor's aid immediately even though irritation may have ceased. Refrigerant used in vehicle A/C systems will usually be in a vapor state when being handled in a repair shop. But if a portion of liquid coolant should come in contact with hands or face, note that its temperature momentarily will be at least -22°F.

Do not recover refrigerant in area of a live flame. Never allow temperature of refrigerant drums to exceed 125°F. Resultant increase in temperature will cause a corresponding increase in pressure which may cause safety plug to release or drum to burst. If it is necessary to heat a drum of refrigerant when charging a system, drum should be placed in water that is no hotter than 125°F. Never use a blowtorch, or other open flame. If possible, a pressure release mechanism should be attached before drum is heated.