Gree GMV-36WL/A-T(U) - Page 124

DC Inverter Side Discharge VRF Ⅱ for North America
122
b
．
When turn off the vacuum pump to stop vacuum-pumping, please turn off the valve at
first and then de-energize the vacuum pump;
c． Keep the vacuum pump for 2h and confirm that the pressure of vacuum meter hasn’t
been increased.
5.2 Fill and charge refrigerant
5.2.1 Filling procedure of regrigerant
Refrigerant quantity of outdoor unit before delivery:
Model
GMV-36WL/A-T(U)
GMV-48WL/A-T(U)
GMV-60WL/A-T(U)
Refrigerant Qty (kg/oz)
5.0
(176)
5.0
(176)
6.5
（229）
(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.
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! Liquid 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.