Water-cooled Heat Recovery DC Inverter VRF
17
Fig.4.4.2
4.4.2 Additional refrigerant charging
Outdoor unit has been charged refrigerant before delivery.
Charge additional refrigerant for field-installed connecting pipe. Check the table below (only
apply the liquid pipe as benchmark) for the refrigerant to be added when the pipeline length exceeds
one meter each time.
How much additional refrigerant should be charged.
Total refrigerant charging amount R= Pipeline charging amount A + Refrigerant charging amount
B of every module .
(1) Pipeline charging amount.
Added refrigerant quantity A for piping = ∑Liquid pipe length × Added refrigerant quantity for each
meter (in.) of liquid pipe.
Diameter of liquid pipe
mm(in.)
28.6(1-1/8)
25.4(1)
22.2(7/8)
19.05(3/4)
15.9(5/8)
12.7(1/2)
9.52(3/8)
6.35(1/4)
kg/m
0.680
0.520
0.350
0.250
0.170
0.110
0.054
0.022
OZ/in.
0.61
0.47
0.31
0.22
0.15
0.10
0.05
0.02
(2) Refrigerant charging amount B of every module.
Refrigerant charging amount B of every
module kg(Pounds)
Rated Capacity(1000Btu/h)
IDU/ODU rated
capacity collocation
ratio C
Quantity of
included IDUs(N)
72
96
120
50%
≤C≤90%
N
＜
4
0
0
0
N≥4
0.5(1.1)
0.5(1.1)
0.5(1.1)
90%
＜
C≤105%
N
＜
4
1(2.2)
1(2.2)
1.5(3.3)
8
＞
N≥4
3.5(7.7)
2(4.4)
3(6.6)
N≥8
4(8.8)
3.5(7.7)
5.5(12.1)
105%
＜
C≤135%
N
＜
4
2(4.4)
2(4.4)
2.5(5.5)
8
＞
N≥4
4(8.8)
3.5(7.7)
4(8.8)
N≥8
4.5(9.9)
4.5(9.9)
5(11.0)
Summary of Contents for GMV-WQ120WM/A-F
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