REFRIGERATION SYSTEM REPAIRS GENERAL - TM-9-4120-423-14-P0323

TM9 4120-423-14&P

REFRIGERATION SYSTEM REPAIRS GENERAL

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The refrigeration system must be totally discharged before any maintenance action is performed on any

system component. Leak testing and dehydrator replacement are required after any system component

has been removed and replaced. The system must be evacuated before it is charged. The system must

be properly charged to function properly.

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.

REFRIGERANT R-22 UNDER PRESSURE is used in the operation of this equipment. DEATH or

severe injury may result if you fail to observe safety precautions. Never use a heating torch on any part

that contains Refrigerant R-22. Do not let liquid Refrigerant R-22 touch you, and do not inhale

Refrigerant R-22 gas.

Refrigerant R-22 must be recaptured in a recycling/reclaiming machine. R-22 cannot be vented into the

air. Do not discharge near open flame.

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