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6 Air evacuation
Additional refrigerant per pipe length
Connective pipe
length(m)
Less than
Standard pipe
length x N
More than
Standard pipe
length x N
Make sure to remove the additional
refrigerant charge according to the rated
volume (5m refrigerant piping) when doing
market or government verification test.
6�2 Safety and leakage check
6�2�1 Electrical safety check
Perform the electrical safety check
after completing installation. Cover the
following areas:
1. Insulated resistance
2. The insulated resistance must be
more than 2MΩ.
3. Grounding
work
grounding work, measure the grounding
resistance by visual detection and using
the grounding resistance tester. Make
sure the grounding resistance is less
than 4Ω.
4. Electrical leakage check (performing
during test while unit is on).
5. During a test operation after completed
installation, the use the electroprobe
and
multimeter
electrical leakage check. Turn off the
unit immediately if leakage happens.
Try and evaluate different solutions
until the unit operates properly.
54 / EN
Air purging
method
Vacuum
Pump
Liquid Side: Ø 6.35 (Ø 1/4")
Vacuum
(Total pipe length - pre-
Pump
charge pipe lengthxN)
After
finishing
to
perform
Multi Split Type Air Conditioner / User Manual
Additional refrigerant
N/A
(Total pipe length - pre-charge
x15g/m
6�2�2 Gas leak checks
1. Soap water method: Apply a soap-water
solution or a liquid neutral detergent on
the indoor unit connection or outdoor
unit connections with a soft brush to
check for leakage of the connecting
points of the piping. If bubbles emerge,
the pipes are experiencing leakage.
2. Leak detector Use the leak detector to
check for leakage.
The illustration is for
example purposes only. The
C
actual order of A, B, C, D,
and E on the machine may
be slightly different from the
unit you purchased but the
general shape will remain
the same.
Indoor unit
check point
Outdoor
Outdoor unit
unit check
check point
point
an
A, B,C,D are points for one-four type.
A, B,C,D are points for one-four type.
A, B,C,D, and E are points for the one-five type.
A, B,C,D, and E are points for the one-five type.
Liquid Side: Ø 9.52 (Ø 3/8")
pipe lengthxN) x30g/m
Indoor unit
check point
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