Gree GMV-VQ680WM/C-X Service Manual page 224

Gree
2.2 Refrigerant charging amount B of every module
Refrigerant charging amount B of every module (kg)
IDU/ODU rated capacity
collocation ratio C ①
50%≤C≤70%
70%<C≤90%
90%<C≤105%
105%<C≤135%
Notes:
① Rated capacity configuration rate of indoor unit and outdoor unit C = sum of indoor unit
rated cooling capacity / sum of outdoor unit rated cooling capacity.
② If all indoor units are all fresh air indoor units, the added refrigerant amount for each
module B is 0kg.
③ If all fresh air indoor units are mixed with the general VRF indoor units, charge the
refrigerant according to the refrigerant-charging method of the general indoor unit.
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=14.0×5/(28.0+45.0)=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 2.0 kg.
Additional refrigerant quantity B for 45kw module is 4 kg.
So, ∑Refrigerant charging amount B of every module=2.0+4=6 kg.
Suppose the Pipeline charging amount A=∑Liquid pipe length×refrigerant charging amount of
every 1m liquid pipe=20kg.
Total refrigerant charging amount R=20+6=26kg.
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, ∑Refrigerant charging amount B of every module= 0kg.
Suppose the Pipeline charging amount A=∑Liquid pipe length×refrigerant charging amount of
every 1m liquid pipe = 5kg.
Total refrigerant charging amount R = 5+0=5kg.
Modular combination of outdoor unit subjects to combinations that is currently available.
②
Quantity of
indoor unit
<4
≥4
<4
≥4
<4
≥4
<4
≥4
GMV6 HR DC Inverter VRF Units Service Manual
22.4 28.0 33.5
0 0
0.5 1.0 1.0
0.5 1.0 1.0
1.0 1.0 1.0
1.0 1.0 1.0
2.0 2.0 2.0
2.0 2.0 2.0
3.5 4.0 4.0
222
Module capacity (kW)
40.0 45.0 50.4
0 0 0 0
1.0 1.0 1.0
2.0 2.0 2.0
2.0 2.0 3.0
2.0 2.0 3.0
4.0 4.0 5.0
3.0 3.0 4.0
5.0 5.0 6.0
56.0 61.5
0 0
1.0 1.5
2.0 2.0
3.0 3.5
3.0 3.5
5.0 5.0
4.0 4.0
6.0 6.0