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 TM 55-1905-223-24-18-1
To charge system with R-12, perform the following:
f.
WARNING
PRESSURIZED GAS HAZARD. Handle R-12 refrigerant
containers with care to avoid personal injury.
Keep containers away from external heat sources.
DO NOT DROP containers. When in use, place
containers where they will not be knocked over.
NOTE
System holds 30 lbs. of R-12 refrigerant. Make
sure enough R-12 refrigerant is on hand to fill
system. Weigh and record supply container weight
to check quality used when charge is complete.
(1) Attach middle gauge manifold hoseline to R-12 supply container.
(2) Momentarily crack open the supply container valve then shut.
loosen the middle hoseline at the manifold to purge the hose then re-
tighten.
(3) Connect electrical wiring at control panel (4), remove tags, and turn on
power to cabinet.
WARNING
Do not use water warmer than 110F to avoid over-
expansion of refrigerant in container.
(4) Place the R-12 supply container upright in a container of warm water that
is no warmer that 110F. This will maintain container pressure and
expedite charging.
WARNING
DO NOT apply heat with a torch.
(5) Start compressor (3).
(6) Slowly open suction side gauge manifold handwheel to permit system
charging.
NOTE
Do not open discharge (high pressure) handwheel.
Observe gauge manifold gages and system sight
glass (2).
2-334
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