Instruction of the GMV D.C. inverter
15
6.2.1 Method of Calculating Mass of Additional Refrigerant to Be Filled (Based on the
Liquid Pipe)
Mass of Additional Refrigerant to Be Filled =∑ Length of Liquid Pipe × Amount of Additional
Refrigerant to Be Filled Per Meter of Liquid Pipe
Φ22.2 Φ19.05 Φ15.9 Φ12.7 Φ9.52 Φ6.35
0.35 0.25 0.17 0.11 0.054 0.022
6.2.2 Example for calculation
d
c
b
a
Indoor unit
① ② ③
④
B
A
C
Outdoor unit
D
Indoor unit:
SN Model
Indoor unit Cassette type
Indoor unit
Wall Mounted type
Indoor unit Single Side Air Supply type
Indoor unit Ducted type
Liquid Pipe:
SN A B C D
Diameter of the pipe Φ9.52 Φ9.52 Φ9.52 Φ6.35
Length 30m 10m 5m 5m
SN a b c d
Diameter of the pipe Φ9.52 Φ6.35 Φ6.35 Φ6.35
Length 10m 10m 10m 10m
Total length of liquid pipes:
Φ
9.52:A+B+C+a=30+10+5+10=55m
Φ
6.35:D+b+c+d=5+10+10+10=35m
Notes: if total length is less than 50 meters, there is no need to add extra refrigerant.
So, the minimum required refrigerant amount should be=(55-50) 0.054+35 0.022=1.04kg.
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