Gree Ultra Heat GMV Multi VRF Series Owner's Manual page 30

Ultra Heat GMV Multi VRF_Heat Recovery Serial
4.5.2 Additional refrigerant charging
Outdoor unit has been charged refrigerant before delivery.
If the pipeline is longer than 1m (39-3/8inch), please refer to the following table for charging amount
of refrigerant. (Liquid pipe prevails)
Total refrigerant charging amount R= Pipeline charging amount A + ∑charging amount B of every
module
(1) Pipeline charging amount
Added refrigerant quantity A for piping = Added refrigerant quantity A1 for liquid piping + Added
refrigerant quantity A2 for high pressure gas piping
Added refrigerant quantity A1 for liquid piping = ∑Liquid pipe length × Added refrigerant quantity for
each meter (inch) of liquid pipe
28.6(1-1/8)
kg/m 0.680
OZ/inch 0.61
Added refrigerant quantity A2 for high pressure gas piping = ∑high pressure gas pipe length ×
Added refrigerant quantity for each meter (inch) of high pressure gas pipe
28.6(1-1/8)
kg/m 0.054
OZ/inch 0.048
Note: high pressure gas pipe lengths means all the lengths between ODU and mode exchangers.
(2) ∑Refrigerant charging amount B of every module
Refrigerant charging amount B of every module kg(lb)
IDU/ODU rated capacity
collocation ratio C
50%≤C≤90%
90%＜C≤105%
105%＜C≤135%
For example 1:
Diameter of liquid pipe mm(inch)
25.4(1) 22.2(7/8)
0.520 0.350
0.47 0.31
Diameter of high pressure gas pipe mm(inch)
25.4(1)
0.046
0.041
Quantity of included
IDUs(N)
N＜4
N≥4
N＜4
8＞N≥4
N≥8
N＜4
8＞N≥4
N≥8
19.05(3/4) 15.9(5/8)
0.250 0.170
0.22 0.15
22.2(7/8) 19.05(3/4)
0.032 0.024
0.029 0.022
Rated Capacity(1000Btu/h)
72
0
0.5(1.1)
0
0.5(1.1)
2(4.4)
0.5(1.1)
2.5(5.5)
4(8.8)
25
12.7(1/2) 9.52(3/8)
0.110 0.054
0.10 0.05
15.9(5/8)
0.017
0.015
96
0
1(2.2)
0.5(1.1)
1.5(3.3)
3(6.6)
1(2.2)
3.5(7.7)
5(11.0)
6.35(1/4)
0.022
0.02
12.7(1/2)
0.009
0.008