TM 9-4110-256-14
5-13.
CHARGING THE REFRIGERANT SYSTEM.
This task covers:
a. Full Charge
b. Partial Charge
INITIAL SETUP
Equipment Conditions:
General Safety Instructions:
WARNING
Dangerous chemical refrigerant under
Materials/Parts:
pressure is used in the operation of this
Refrigerant R-134a
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.
5-24