TM 9-4110-256-14
5-13.
CHARGING THE REFRIGERANT SYSTEM. - Continued
(9)
Close refrigerant tank, charge, and pressure gauge valves.
NOTE
If 15 pounds (6.8 kg) full charge was obtained, skip steps (10) through (15).
(10) Connect power at power source.
(11) Turn refrigeration unit on (para 4-7) and operate at desired temperature setting.
(12) Set refrigerant tank to deliver gas only.
(13) Check that all service manifold valves are closed.
WARNING
Never introduce high discharge pressure into a refrigerant tank. This can cause the tank to
rupture and injure personnel.
CAUTION
Never introduce liquid refrigerant into the suction shut off valve. This can cause damage to the
(14) Open refrigerant tank, compound gauge, and charge valves.
(15) Monitor weight of the refrigerant tank until total 15 pounds (6.8 kg) charge is obtained. When system is
fully charged, immediately close refrigerant tank, compound gauge, and charge valves.
(16) Run refrigeration unit for 15 minutes and observe sight glass through left side condenser door.
(a)
Green or chartreuse center means refrigerant moisture content is acceptable.
(b)
Yellow center means there is too much moisture in system. Discharge (para 5-8), replace dehydrator
(17) Be sure all service manifold valves are closed.
(18) Shut off refrigeration unit (para 2-7).
b.
Partial Charge.
(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.
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