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Multi Split Type Air Conditioner / User Manual
6 Air evacuation
A
CAUTION! When opening valve
stems, turn the hexagonal
wrench until it hits against the
stopper. Do not try to force the
valve to open further.
12. Tighten valve caps by hand, then tighten it us-
ing the proper tool.
13. If the outdoor unit uses all vacuum valves, and
the vacuum position is at the main valve, the
system is not connected with the indoor unit.
The valve must be tightened with a screw nut.
Check for gas leaks before operation to pre-
vent leakage.
6�1�3 Note on adding refrigerant
A
CAUTION!
• Refrigerant charging must
be performed after wiring,
vacuuming, and the leak
testing.
•
DO NOT exceed the maximum
allowable quantity of refrigerant
or overcharge the system.
Doing so can damage the unit
or impact it’s functioning.
• Charging with unsuitable
substances may cause
explosions or accidents. Ensure
that the appropriate refrigerant
is used.
• Refrigerant containers must
be opened slowly. Always use
protective gear when charging
the system.
• DO NOT mix refrigerants types.
• For the R290 or R32 refrigerant
model, make sure the
condtions within the area have
been made safe by control
of flammable material when
the refrigerant added into air
conditioner.
N=2(one-twin models), N=3(one-three models),
N=4(one-four models), N=5(one-five models).
Depending on the length of connective piping or
the pressure of the evacuated system, you made
need to add refrigerant. Refer to table below for
refrigerant amounts to be added: