Gree ULTRA heating GMV5 Multi VRF Series Service Manual page 53

Liquid valve
7.3.2 Refrigerant Adding
(1) Refrigerant quantity of outdoor unit before delivery:
Mode
Refrigerant Qty (kg/oz)
1) The refrigerant amount charged before delivery doesn't include the amount that needs to be added to indoor units and the
connection pipeline.
2) Length of connection pipe is decided on site. Therefore the amount of additional refrigerant shall be decided on site according to
3) Record the amount of additional refrigerant for convenience of after-sales service.
(2) Calculation of the amount of additional refrigerant
Calculation method of the quantity of additional refrigerant (based on liquid pipe)
Quantity of additional refrigerant = ∑length of liquid pipe X quantity of additional refrigerant per meter
Diameter of liquid
pipe Φ22.2(7/8)
(mm/inch)
kg/m 0.35
oz/inch 0.314
NOTICE! Liquid pipe that is within 20m(65-5/8feet) doesn't need to be added with refrigerant.
3) Calculation example
Manometer
LO knob
Connection hose
Gas valve
GMV-36WL/B-T(U)
6.5(229)
Φ19.05(3/4) Φ15.9(5/8)
0.25
0.224
Manometer
HI knob
Vacuum pump
Φ12.7(1/2)
0.17 0.11
0.152 0.099
Ultra Heating GMV5 Multi VRF
for North America
GMV-48WL/B-T(U)
6.5(229)
r
(39-3/8inch)
Φ9.52(3/8) Φ6.35(1/4)
0.054 0.022
0.048 0.020
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