Gree GMV series User Manual

GMV DC Inverter VRF
29
4.5.2 Additional refrigerant charging
Outdoor unit has been charged refrigerant before delivery.
Charge additional refrigerant for field-installed connecting pipe. If the pipeline is longer than
1m (39-3/8in.), please refer to the following table for charging amount of refrigerant (Liquid pipe
prevails).
How much additional refrigerant should be charged?
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 = ∑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
144
168
50%≤C≤90%
N
＜
4
0
0
0
0
0
N≥4
0.5(1.1)
0.5(1.1)
0.5(1.1)
0.5(1.1)
1(2.2)
90%
＜
C≤105%
N
＜
4
1(2.2)
1(2.2)
1.5(3.3)
1.5(3.3)
2(4.4)
8
＞
N≥4
2(4.4)
2(4.4)
3(6.6)
3(6.6)
3.5(7.7)
N≥8
4(8.8)
3.5(7.7)
4(8.8)
5.5(12.1)
6(13.2)
105%
＜
C≤135%
N
＜
4
2(4.4)
2(4.4)
2.5(5.5)
3(6.6)
3.5(7.7)
8
＞
N≥4
4(8.8)
3.5(7.7)
4(8.8)
4.5(9.9)
5(11.0)
N≥8
4.5(9.9)
4.5(9.9)
5(11.0)
6(13.2)
6.5(14.3)
(1) IDU/ODU rated capacity collocation ratio C = Sum of rated cooling capacity of indoor unit / Sum of rated cooling
capacity of outdoor unit.
(2) If all of the indoor units are fresh air indoor units, the quantity of refrigerant added to each module is 0kg.
(3) If outdoor air processor is connected with normal VRF indoor unit, adopt the perfusion method for normal indoor
unit for perfusion.
For example1:
The OUD is composed of 3 modules: 72kBtu/h, 120 kBtu/h and 120 kBtu/h. The IDUs are
made up of 7sets of 48 kBtu/h.
IDU/ODU rated capacity collocation ratio C= 48×7/ (72+120+120) =108%.The quantity of

Gree GMV series Specifications

General

Brand	Gree
Model	GMV series
Category	Air Conditioner
Language	English