Gree GMV-36WL/A-T(U) - Airtightness Test Procedures

DC Inverter Side Discharge VRF Ⅱ for North America
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(3) Calculation example
IDU:
No.
IDU ①
IDU ②
IDU ③
IDU ④
Model
Duct type
GMV-ND18PLS/A-T(U)
Duct type
GMV-ND12PLS/A-T(U)
Duct type
GMV-ND09PLS/A-T(U)
Duct type
GMV-ND09PLS/A-T(U)
Liquid pipe:
No.
A
B
C
D
Pipe size
Φ9.52mm
(Φ3/8inch)
Φ9.52 mm
(Φ3/8inch)
Φ9.52 mm
(Φ3/8inch)
Φ6.35 mm
(Φ1/4inch)
Length
10m
(32-3/4feet)
5m
(16-3/8feet)
5m
(16-3/8feet)
5m
(16-3/8feet)
No.
a
b
c
d
Pipe size
Φ9.52mm
(Φ3/8inch)
Φ6.35 mm
(Φ1/4inch)
Φ6.35 mm
(Φ1/4inch)
Φ6.35 mm
(Φ1/4inch)
Length
3m
(9-3/4feet)
3m
(9-3/4feet)
2m
(6-5/8feet)
1m
(3-1/4feet)
Total length of each liquid pipe
Φ9.52：A+B+C+a=10+5+5+3=23m(75-1/2 feet)
Φ6.35: D+b+c+d=5+3+2+1=11m(36feet)
NOTICE! Liquid pipe that is within 20m(65-5/8 feet) doesn’t need to be added with
refrigerant.
Therefore, the minimum quantity of additional refrigerant = (23-20)×0.054+11×0.022＝
0.404kg(14oz)
5.3.2 Operation procedure for adding refrigerant
(1) Put the charging tank on the weightometer, record the reading and then calculate the data
after charging refrigerant;
(2) Use charging conduct pipe to connect the double-ended manometer with governing valve