TM 5-3805-298-23-4
0405
CHARGING
000405
WARNING
Contact with refrigerant can cause frostbite. Keep hands and face away to prevent
personal injury.
Protective face shield and gloves must always be worn when refrigerant lines are opened,
even if gauges indicate A/C system is empty.
Always use caution when disconnecting fittings. Slowly loosen fitting in well-ventilated
area.
Do not smoke when servicing A/C or wherever refrigerant gas may be present.
Failure to follow these warnings may result in injury or death to personnel.
CAUTION
DO NOT charge A/C system with liquid refrigerant through compressor suction ports. This
could seriously damage compressor.
NOTE
Charging should be performed at air temperature of 70F (21C) and above. Changes in
ambient air temperature will affect A/C system's ability to take charge and will vary gauge
readings.
Do not add partial charge to A/C system. Accurate refrigerant charge can only be
determined by weight or by temperature of evaporator core. Always recover refrigerant
then evacuate A/C system before charging.
Operating A/C system periodically during off-season will lubricate seals and reduce
possibility of refrigerant loss.
Up to 7 oz. (200 g) of refrigerant loss per year is considered normal.
0405-7
