Additional Refrigerant Charging - Gree GMV-72WM/B-U Owner's Manual

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(39-3/8inch), 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(inch) of liquid pipe.
28.6(1-1/8)
kg/m 0.680
OZ/inch 0.61
25.4(1) 22.2(7/8)
0.520 0.350
0.47 0.31
Fig.4.5.1
Fig.4.5.2
Diameter of liquid pipe
19.05(3/4) 15.9(5/8)
0.250 0.170
0.22 0.15
25
GMV DC Inverter VRF
12.7(1/2) 9.52(3/8)
0.110 0.054
0.10 0.05
mm(inch)
6.35(1/4)
0.022
0.02