Gree GMV-121WL/C-T - Page 147

GREE DC Inverter Multi VRF System II Service Manual
143
3) Calculation example
IDU
No.
IDU ķ
IDU ĸ
IDU Ĺ
IDU ĺ
Model
Duct type
GMV-ND72PL/B-T
Duct type
GMV-ND50PL/B-T
Duct type
GMV-ND36PL/B-T
Duct type
GMV-ND25PL/B-T
Liquid pipe:
No.
A
B
C
D
Pipe size
Φ9.52
Φ9.52
Φ9.52
Φ6.35
Length
10m
5m
5m
5m
No.
a
b
c
d
Pipe size
Φ9.52
Φ6.35
Φ6.35
Φ6.35
Length
3m
3m
2m
1m
Total length of each liquid pipe
Φ9.52˖A+B+C+a=10+105+5+3=23m
Φ6.35: D+b+c+d=5+3+2+1=11m
Quantity of indoor unit: 4 sets
Therefore, the minimum quantity of additional refrigerant = (23×0.054+11×0.022)+(4-2) ×0.3˙
2.084kg
˄3˅Calculate the additional volume of refrigerant (GMV-H224WL/A-XǃGMV-H280WL/A-Xǃ
GMV-H335WL/A-XǃGMV-224WL/C-XǃGMV-280WL/C-XǃGMV-335WL/C-X)
1) Refrigerant quantity of outdoor unit before delivery:
Model
GMV-H224WL/A-X
GMV-224WL/C-X
GMV-H280WL/A-X
GMV-280WL/C-X
GMV-H335WL/A-X
GMV-335WL/C-X
Refrigerant Qty (kg)
5.5
7.1
8.0