TM 9-4110-255-14
5-15. CHARGING THE REFRIGERANT SYSTEM .
This task covers:
a. Full Charge
b. Partial
c. Charge
INITIAL SETUP
Materials/Parts:
General Safety Instructions:
Refrigerant R-134a
WARNING
26, Appendix E
Equipment Conditions:
Sudden and irreversible tissue damage
can result from freezing. Wear gloves and
Service manifold installed (para 5-9).
can result from freezing. Wear gloves and
Refrigerant system evacuated (para 5-14).
a face protector or safety glasses in any
situation where skin or eye contact with
General Safety Instructions:
refrigerant is possible.
Heat may cause the refrigerant to
WARNING
decompose and release irritating, toxic,
and corrosive gases. Prevent contact of
Dangerous chemical refrigerant under
refrigerant with flame or hot surfaces.
pressure is used in the operation of this
Never introduce high discharge pressure
equipment. Use great care to avoid contact
into a refrigerant cylinder. This can cause
with liquid refrigerant.
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 gage and pressure gage valv s are closed.
e
(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.
(6)
Set refrigerant tank to deliver liquid only.
(7)
Place refrigerant tank on an accurate scale to measure and record weight.
5-25
