Gree GMV-680WM/E-X Manuel D'utilisateur page 36

GMV DC Inverter VRF
(1) Pipeline charging amount
Pipeline charging amount A= ∑Liquid pipe length×refrigerant charging amount of every 1m
liquid pipe
Diameter of liquid
Φ28.6
pipe (mm)
kg/m 0.680
(2) ∑Refrigerant charging amount B of every module
Refrigerant charging amount B of every
module(kg)②
IDU/ODU rated capacity
collocation ratio C ①
50%≤C≤70%
70%＜C≤90%
90%＜C≤105%
105%＜C≤135%
Note:
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:
Outdoor unit consists of one 28kW module and one 45kW module. Five 14kW duct type
units are used as indoor units.
IDU/ODU rated capacity collocation ratio C= 140×5/(280+450)=96%. The quantity of
included IDUs is more than 4 sets. Please refer to the above table.
Additional refrigerant quantity B for 28kW module is 2.0kg.
Additional refrigerant quantity B for 45kw module is 3.5kg.
So, ∑Refrigerant charging amount B of every module=2.0+3.5=5.5kg
Suppose the Pipeline charging amount A=∑Liquid pipe length×refrigerant charging amount
of every 1m liquid pipe=20kg
Total refrigerant charging amount R=20+5.5=25.5kg
For example 2:
Outdoor unit is a 45kW module and the indoor unit is a 45kW fresh air unit. The quantity (B)
of refrigerant added to this module is 0kg.
So, ∑B (Quantity of refrigerant added to each module) = 0kg
Suppose that A (Quantity of refrigerant added to connection pipe) = ∑Length of liquid pipe
x Quantity of refrigerant added to liquid pipe per meter) = 5kg
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Φ25.4 Φ22.2 Φ19.05
0.520 0.350 0.250
Quantity of
22.4
included IDUs
＜4
0
≥4
0.5
＜4
0.5
≥4
1.0
＜4
1.0
≥4
2.0
＜4
2.0
≥4
3.5
33
Φ15.9 Φ12.7
0.170 0.110
Module capacity(kW)
28.0 33.5 40.0 45.0 50.4
0 0 0 0
0.5 0.5 0.5 0.5
0.5 1.0 1.5 1.5
1.0 1.5 2.0 2.0
1.0 1.5 2.0 2.0
2.0 3.0 3.5 3.5
2.0 2.5 3.0 3.0
3.5 4.0 5.0 5.0
Φ9.52 Φ6.35
0.054 0.022
56.0 61.5
0 0 0
0.5 1.0 1.5
1.5 2.0 2.0
2.5 3.0 3.5
2.5 3.0 3.5
4.0 4.5 5
3.5 4.0 4.0
5.5 6.0 6.0