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TM 9-4110-257-14
5-12.
CHARGING THE REFRIGERANT SYSTEM.
This task covers:
a. Full Charge
b. Partial Charge
INITIAL SETUP
Materials /Parts:
Refrigerant R-134a
12, Appendix E
Equipment Conditions:
Service manifold installed (para. 5-6).
Refrigerant system evacuated (para. 5-11).
General Safety Instructions:
WARNING
•
Dangerous chemical refrigerant under pressure is used in the
operation of this equipment. Use great care to avoid contact with
liquid refrigerant.
•
Sudden and irreversible tissue damage can result from freezing.
Wear gloves and a face protector or safety glasses in any situation
where skin or eye contact with refrigerant is possible.
•
Heat may cause the refrigerant to decompose and release irritating,
toxic, and corrosive gases. Prevent contact of refrigerant with flame
or hot surfaces.
•
Never introduce high discharge pressure into a refrigerant cylinder.
This can cause the cylinder to rupture and injure personnel.
a.
Full Charge.
CAUTION
The system must be evacuated before charging. Moisture in the system
will prevent the refrigeration unit from operating properly.
(1) Connect the charge hose to a tank containing refrigerant R-134a set to deliver gas and the vacuum hose to
reclaim unit.
(2) Check that compound gauge and pressure gauge valves are closed.
(3) Open vacuum and charge valves.
(4) Open refrigerant tank valve. Operate reclaim unit for 3 to 5 seconds to purge hoses.
(5) Close refrigerant tank, vacuum, and charge valves then stop reclaim unit.
5-22
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