Instruction of the GMV D.C. Inverter
15
6.2.2 Example for calculation
Indoor unit:
SN Model
Indoor unit Cassette type
Indoor unit Wall Mounted type
Indoor unit Ultra-thin duct type GMV-R50P/NaL
Indoor unit Duct type split
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:
φ9.52:A+B+C+a=30+10+5+10=55m
φ6.35: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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