Giatsu IX41B Serie Manuel D'installation page 61

Note On Adding Refrigerant
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 ammable material when the refrigerant added into air conditioner.
• The maximum refrigerant charge amount of R32 is 305 grams.
N=2(one-twin models), N=3(one-three models), N=4(one-four models), N=5(one- ve 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:
Connective Pipe
Length(m)
Pre-charge pipe length (ft/m)
(Standard pipe length xN )
More than (Standard
pipe lengthxN) ft/m
Note: The standard pipe length is 7.5m (24.6').
ADDITIONAL REFRIGERANT PER PIPE LENGTH
Air Purging
Method
Vacuum Pump
Liquid Side: Ø 6.35 (Ø 1/4")
R32
(Total pipe length - standard pipe lengthxN) x12g/m
(Total pipe length - standard pipe lengthxN) x0.13oZ/ft
Vacuum Pump
Liquid Side: Ø 6.35 (Ø 1/4")
R410A
(Total pipe length - standard pipe lengthxN) x15g/m
(Total pipe length - standard pipe lengthxN) x0.16oZ/ft
Additional Refrigerant
N/A
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Liquid Side: Ø 9.52 (Ø 3/8")
R32
(Total pipe length - standard pipe lengthxN) x24g/m
(Total pipe length - standard pipe lengthxN) x0.26oZ/ft
Liquid Side: Ø 9.52 (Ø 3/8")
R410A
(Total pipe length - standard pipe lengthxN) x30g/m
(Total pipe length - standard pipe lengthxN) x0.32oZ/ft