Free match split type air conditioner / Installation Manual
35 / 44 EN
Fig. 9.3
C
Note on adding refrigerant
•
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.
•
Refrigeran t containers must be opened slowly. Always use protective gear when
charging the system.
•
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).
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:
Additional refrigerant per pipe length
Connective pipe length
Air purging
method
Additional refrigerant (R410A:)
Pre-charge pipe
length(ft/m) (Standard pipe
lengthxN)
Vacuum pump
N/A
More than (standard pipe
lengthxN) ft/m
Vacuum pump
Liquid Side: Ø 6.35 (Ø 1/4”)
(Total pipe length - standard pipe
lengthxN) x15g/m
(Total pipe length - standard pipe
lengthxN) x0.16oZ/ft
Liquid Side: Ø 9.52 (Ø 3/8”)
(Total pipe length - standard pipe
lengthxN) x30g/m
(Total pipe length - standard pipe
lengthxN) x0.32oZ/ft
9
Air evacuation