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6 Air evacuation
Additional refrigerant per pipe length
Connective pipe
length (m)
Pre-charge pipe
length (ft/m)
(pre-charge pipe
length xN)
More than (pre-
charge pipe
lengthxN) ft/m
C
The standard pipe length
is 7.5m.
Only for Australia models:
• DO NOT mix refrigerants types. N=2(one-
twin models), N=3(one-three models),
N=4(one-four models), N=5(one-
five models). Some systems require
additional charging depending on pipe
lengths. The standard pipe length is
10m. The additional refrigerant to be
charged can be calculated using the
following formula:
Multi Split Type Air Conditioner / User Manual
Air purging
method
Vacuum
Pump
Liquid Side: Ø 6.35 (ø 1/4")
(Total pipe length - pre-
charge pipe lengthxN) x
(Total pipe length - pre-
charge pipe lengthxN) x
Vacuum
Pump
Liquid Side: Ø 6.35 (ø 1/4")
(Total pipe length - pre-
charge pipe lengthxN) x
(Total pipe length - pre-
charge pipe lengthxN) x
Additional refrigerant
N/A
R32:
12g/m
0.13oZ/ft
R410A:
15g/m
0.16oZ/ft
Liquid Side: Ø 9.52 (ø 3/8")
R32:
(Total pipe length - pre-
charge pipe lengthxN) x
24g/m
(Total pipe length - pre-
charge pipe lengthxN) x
0.26oZ/ft
Liquid Side: Ø 9.52 (ø 3/8")
R410A:
(Total pipe length - pre-
charge pipe lengthxN) x
30g/m
(Total pipe length - pre-
charge pipe lengthxN) x
32oZ/ft
53 / EN
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