Avoid exposure to vapors through spills or leaks. Evacuate the area if a large spill occurs. Return only after the area has been properly ventilated. Verify proper cylinder hookup to the system. Check to be sure the cylinder label matches the color code.
Open cylinder valves slowly.
Avoid rough handling of refrigerant cylinders. Verify that the system has been completely evacuated with a vacuum pump before cutting any lines. Before welding or brazing, evacuate the equipment and then break the vacuum with air or nitrogen. Do not perform any repair on pressurized equipment. Always ventilate the work area before using open flames.