DISCHARGING THE REFRIGERANT R-22 SYSTEM

TM9 4120-423-14&P

DISCHARGING THE REFRIGERANT R-22 SYSTEM

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THIS WORK PACKAGE COVERS:

Servicing

Tools and Special Tools

Charging Manifold

Refrigeration Wrench

Personnel Required

Direct Support Technician

Equipment Conditions

Air conditioner removed from shelter, if

necessary

SERVICING

WARNING

DANGEROUS CHEMICAL is used in this equipment

DEATH or serious injury may result if personnel fail to observe proper safety precautions. Great care

must be exercised to prevent contact of liquid Refrigerant R-22, or Refrigerant R-22 gas discharged

under pressure, with any part of the body. The extremely low temperature resulting from the rapid

expansion of liquid Refrigerant R-22, or Refrigerant R-22 gas released under pressure, can cause sudden

and irreversible tissue damage through freezing. As a minimum, all personnel must wear thermal

protective gloves and a face shield or goggles when working in any situation where Refrigerant R-22

contact with the skin or eyes is possible. Application of excessive heat to any component in a charge

system will cause extreme pressure that may result in a rupture, possibly explosive in nature. Exposure

of Refrigerant R-22 to an open flame or a very hot surface will cause a chemical reaction in the gas to

form carbonyl chloride (phosgene), a highly toxic and corrosive gas. In its natural state, Refrigerant R-

22 is a colorless odorless vapor with no toxic characteristics. It is lighter than air and in a well-

ventilated area will disperse rapidly. However, in an unventilated area it presents danger as a suffocant.

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