REFRIGERATION SYSTEM REPAIRS GENERAL

TM 5-4120-359-14

4-4. REFRIGERATION SYSTEM REPAIRS GENERAL

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 severe damage may result if personnel fail to observe safety precautions. Use

great care to avoid contact with liquid refrigerant gas being discharged under

pressure. Sudden and irreversible tissue damage can result from freezing. Wear

thermal protective gloves and a face protector or goggles in any situation where

skin-eye-contact is possible. Prevent contact of refrigerant gas with flame or hot

surfaces. Heat causes the refrigerant to break down and form carbonyl chloride

(phosgene), a highly toxic and corrosive gas.

WARNING

REFRIGERANT 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 touch you, and do not inhale refrigerant gas.

4-5. DISCHARGING THE REFRIGERANT SYSTEM

Preliminary Procedure: Remove air conditioner from shelter, if necessary. (See paragraph 3-6.)

WARNING

Death or severe damage may result if personnel fail to observe safety precautions.

Use great care to avoid contact with liquid refrigerant or refrigerant gas being

discharged under pressure. Sudden and irreversible tissue damage can result

from freezing. Wear thermal protective gloves and a face protector or goggles in

any situation where skin-eye-contact is possible.

Prevent contact of refrigerant gas with flame or hot surfaces. Heat causes the

refrigerant to break down and form carbonyl chloride (phosgene), a highly toxic

and corrosive gas.

NOTE

In accordance with Environmental Protection Agency regulations, refrigerants

cannot be discharged into the atmosphere. A refrigerant recovery & recycling unit

must be used whenever discharging the refrigerant system.

a. Remove caps from the two service valve hose connections.

b. Connect the charging manifold hoses to the manifold and air conditioner service valves.

Attach a hose assembly to the center connection of the manifold.

Change 4 4-25