Gree GMV-V72W/A-F Owner's Manual page 30

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:
The OUD is GMV-V192WM/A-F(U) including GMV-V96W/A-F(U) and GMV-V96W/A-F(U). The IDUs
are made up of 11sets of GMV-ND18PHS/A-T(U).
IDU/ODU rated capacity collocation ratio C=18×11/192=103%.The quantity of included IDUs is more
than 4 sets. Please refer to the above table.
Refrigerant charging amount B for GMV-V96W/A-F(U) module is 3kg(6.6lbs).
Refrigerant charging amount B for GMV-V96W/A-F(U) module is 3kg(6.6 lbs).
Suppose the Pipeline charging amount A=25kg (55.1 lbs)
Total refrigerant charging amount R=25+3+3=31.5kg (55.1+6.6+6.6=68.3 lbs).
After confirming that there is no leakage from the system, charge additional R410A with specified
amount to the unit through the filling opening of the liquid pipe valve of the outdoor unit when the
compressor is not in operation. If required additional refrigerant cannot be quickly filled for increase of
pressure in the pipe, set the unit at cooling startup and then fill the refrigerant from gas valve of outdoor
unit. If ambient temperature is low, the unit can't be set to cooling mode but heating mode.
4.5.3 Precautions on refrigerant leakage
Personnel related to air conditioning engineering design and installation operators must abide by the
safety requirement for preventing refrigerant leakage specified in local laws and regulations.
Ultra Heat GMV series VRF units adopt the R410A refrigerant, which is nonflammable and nontoxic.
However, the space for refrigerant leakage must be sufficient to ensure that the refrigerant concentration
Quantity of included IDUs(N)
N＜4
N≥4
N＜4
8＞N≥4
N≥8
N＜4
8＞N≥4
N≥8
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)
26
Ultra Heat GMV Multi VRF
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)