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6 Air evacuation
9. Watch the Pressure Gauge for one
minute to make sure that there is no
change in pressure. It should read
slightly higher than the atmospheric
pressure.
10. Remove the charge hose from the
service port.
11. Using hexagonal wrench, fully open
both the high pressure and low
pressure valves.
CAUTION!
opening valve stems, turn
A
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 using 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 prevent leakage.
52 / EN
6�1�3 Note on adding refrigerant
When
N=2(one-twin
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:
Multi Split Type Air Conditioner / User Manual
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
A
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.
models),
N=3(one-three
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