Gree Inverter VRF System II GMV-120WL/A-X

Ensure power is not disconnected before installation is finished

Verify all wires for controller and electric wires are connected correctly and reliably

Check that the fixing ring of the compressor foot for transportation is removed

Remove all sundries from the unit (e.g., metal chips, joint, forceps holder)

Inspect for damage to appearance and pipeline system during transportation

Calculate and record the required added refrigerant-charging volume based on system pipe length

Record refrigerant volume still needed if required volume hasn't been reached

Ensure the valve for outdoor unit is opened completely after adding refrigerant

Ensure the main board of the outdoor unit is replaced

Is the debugging performed by a professional or under the guidance of a professional?

Confirm the unit operates correctly after debugging

Selection requirement for the vacuum pump

Is the vacuum pump suitable for the refrigerant system?

Enter the final vacuum reading of the vacuum pump (should reach -0.1Mpa)

Enter the air discharge volume of the vacuum pump (should be 4L/S or above)

Enter the precision of the vacuum pump (should be 0.02mmHg or above)

Does the system vacuum pump for R410A have a check valve?

Operation procedure and notices for Vacuum drying

Confirm that the cut-off valve for gas pipe and liquid pipe is at off status.

Connect the governing valve and vacuum heat pump to the detection joint of gas valve and liquid valve using charging conduct pipe.