5-12. CHARGING THE REFRIGERANT SYSTEM.
This task covers:
a. Full Charge
b. Partial Charge
General Safety Instructions:
Dangerous chemical refrigerant under
pressure is used m 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 m 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
a. Full Charge.
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
(2) Check that compound gauge and pressure gauge valves are dosed
(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.