GREE DC Inverter Multi VRF System II Service Manual
141
6.2 Fill and charge refrigerant
6.2.1 Filling procedure of regrigerant
˄1˅Calculate the additional volume of refrigerant (GMV-120WL/A-T ǃ GMV-140WL/A-T ǃ
GMV-160WL/A-TǃGMV-120WL/A-XǃGMV-140WL/A-XǃGMV-160WL/A-X)
1) Refrigerant quantity of outdoor unit before delivery:
5.0 5.0 5.0 5.0 5.0 5.0
Note:
ķThe refrigerant amount charged before delivery doesn’t include the amount that needs to be added
to indoor units and the connection pipeline.
ĸLength 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.
ĹRecord 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 × quantity of additional refrigerant per meter
Quantity of additional refrigerant per meter for liquid pipe˄kg/m˅
Note: Liquid pipe that is within 20m 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.
3) Calculation example
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