Gree GMV-24WL/C-T, Service Manual, Page: 84 / 150

GREE DC Inverter Side Discharge VRF
Ⅱ
for North America
81
Fig. 23
6.3.2 Refrigerant Adding
(1) Refrigerant quantity of outdoor unit before delivery:
Model
GMV-24WL/C-T
(U)
GMV-28WL/C-T
(U)
GMV-36WL/A-T
(U)
GMV-48WL/A-T
(U)
GMV-60WL/A-T
(U)
Refrigerant Qty
(kg/oz)
2.4
(84.7)
2.4
(84.7)
5.0
(176)
5.0
(176)
6.5
(229)
Model
GMV-36WL/C-T
(U)
GMV-48WL/C-T
(U)
GMV-60WL/C-T
(U)
- -
Refrigerant Qty
(kg/oz)
3.3
(116)
3.3
(116)
4.6
(162)
- -
(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 the dimension and length of field-installed liquid pipe.
(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(39-3/8inch)
Diameter of
liquid pipe
(mm/inch)
Φ22.2
(
Φ7/8)
Φ19.05
(
Φ3/4)
Φ15.9
(
Φ5/8)
Φ12.7
(
Φ1/2)
Φ9.52
(
Φ3/8)
Φ6.35
(
Φ1/4)
kg/m 0.35 0.25 0.17 0.11 0.054 0.022
oz/inch 0.314 0.224 0.152 0.099 0.048 0.020
NOTICE! L iquid pipe that is within 20m(65-
5/8feet) doesn’t need to be added with refrigerant.
First confirm that there is no leakage from the system. When compressor is not working, charge
additional R410a with specific amount to the unit through the filling opening of the liquid pipe valve of the
outdoor unit. If required amount cannot be quickly filled due to pressure increase of the pipe, then set the
unit in cooling startup and fill refrigerant from the low pressure check valve of the outdoor unit.