Gree GMV-S280W/A-X

GMV5 Home DC Inverter Multi VRF Units
192
13.2 Calculation of Additional Refrigerant Charge Amount
13.2.1 Constitution of additional refrigerant charge
Additional refrigerant charge amount = additional refrigerant charge of liquid pipe ×additional
refrigerant charge of hydro box + additional refrigerant charge of high pressure gas pipe
（
1
）
Additional refrigerant charge of liquid pipe
Additional refrigerant charge of liquid pipe(kg)=∑length of liquid pipe × refrigerant charge
amount of every meter of liquid pipe.
Refrigerant charge amount of every meter of liquid pipe(kg/m)
φ28.6
φ25.4
φ22.2
φ19.05
φ15.9
φ12.7
φ9.52
φ6.35
0.680
0.520
0.350
0.250
0.170
0.110
0.054
0.022
Note:
① Liquid pipe includes the liquid pipe which ODU connects IDU and the liquid pipe which
ODU connects hydro box.
② For GMV-S120WL/A-S, GMV-S140WL/A-S, GMV-S160WL/A-S, if the total liquid pipe
length is within 20m, no additional refrigerant charge is needed.
（
2
）
Additional refrigerant charge of hydro box
Additional refrigerant charge of hydro box(kg)=0.3*quantity of hydro box
（
3
）
Additional refrigerant charge of high pressure gas pipe
Additional refrigerant charge of high pressure gas pipe(kg)=Σlength of high pressure pipe ×
refrigerant charge amount of every meter of high pressure pipe.
Refrigerant charge amount of every meter of high pressure pipe(kg/m)
φ19.05
φ15.9
φ12.7
φ9.52
0.15
0.12
0.09
0.05
Note: High pressure pipe includes the high pressure pipe which ODU connects hydro
box.
13.2.2 Example of calculation
Top discharge GMV-S280W/A-X is taken for example (three sets of indoor unit
GMV-NHD90PLS/ES are connected and two sets of hydro box NRQD16G/A-S are connected: