Rinnai 49 Multi Split Type AC
AIR EVACUATION
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.
ADDITIONAL REFRIGERANT PER PIPE LENGTH
• For R32 refrigerant model, make sure the conditions within the area have been made
NOTE:
The standard pipe length is 10m.
N=3 (3 Head models), N=4 (4 Head models), N=5 (5 Head models).
Depending on the length of connective piping or the pressure of the evacuated system, you
may need to add refrigerant. Refer to table below for refrigerant amounts to be added:
Connective Pipe
Length(m)
Air Purging
Method
Additional Refrigerant (R32)
Less than
Standard pipe length x N
Vacuum Pump
N/A
More than
Standard pipe length x N
Vacuum Pump
Make sure to remove the additional refrigerant charge according to the rated volume (5m
refrigerant piping) when doing market or government verication test.
Liquid Side: Ø 9.52 (mm)
(Total pipe length - pre-charge pipe lengthxN) x30g/m
Liquid Side: Ø 6.35 (mm)
(Total pipe length - pre-charge pipe lengthxN) x15g/m
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