Gree GMV-S120WL/A-S Manuel Du Propriétaire page 25

(3) Calculation example
No. Indoor unit 1
Duct type
Model Duct type
Liquid pipe:
No.
Pipe size
Length
No.
Pipe size
Length
High pressure gas pipe:
1）Additional quantity of refrigerant for liquid pipe (kg)
Φ 9.52：A+B+C+D+e+a=5+30+10+5+5+10=65m
Φ 6.35: E+b+c+d=5+10+10+10=35m
NOTE!
If liquid pipe is within 20m, there is no need to add refrigerant.
Additional quantity of refrigerant for liquid pipe =（65-20）×0.054+35×0.022=3.2kg
2）Additional quantity of refrigerant for hydro box (kg)
Additional quantity of refrigerant for hydro box =0.3×1=0.3kg
3）Additional quantity of refrigerant for high pressure gas pipe (kg):
Φ 12.7：F=10m
Additional quantity of refrigerant for high pressure gas pipe =10×0.09=0.9kg
Therefore, the minimum additional quantity of refrigerant ＝3.2 + 0.3 + 0.9＝4.4kg.
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Indoor unit 2
Duct type
A B
Φ9.52 Φ9.52
5m 30m
a b
Φ9.52 Φ6.35
10m 10m
No.
Pipe size
Length
Fig.23
Indoor unit 3
Duct type
C
Φ9.52
10m
c
Φ6.35
10m
20
Indoor unit 1 Hydro box 5
Duct type
AQUABOX 16
Duct type
D E
Φ9.52 Φ6.35
5m 5m
d e
Φ6.35 Φ9.52
10m 5m
F
Φ12.7
10m