Supplement And Charge Of Regrigerant - Gree GMV-S120WL/A-S Service Manual

Supplement and charge of regrigerant

6) Connect intermediate soft tube of refrigerant gauge to refrigerant tank, connect one
end of blue soft tube of low pressure gauge to refrigerant charging spout of inhalation
tube, lock it up, and then open the valve of refrigerant tank, open the valve besides low
pressure gauge of refrigerant gauge and discharge for 5 seconds, and then screw up
the joint of soft tube of refrigerant in three-way valve.
Wait for 3 munites, after the unit is started up, we can see that the indicating needle of
low pressure gauge is slowly increasing, and then unscrew the valve besides low
pressure gauge and charge refrigerant (when the low pressure gauge displays
0.4~0.45Mpa, it means it is enouph).
Notes:
7) The outdoor unit has been charged with refrigerant before leaving the factory, when
connecting pipes on the spot, please charge supplementary refrigerant;
8) Check if liquid valve and air valve of outdoor unit have been completely closed;
9) When conducting air proofness and leak detection, please do not mix oxygen,
zcetylene and related dangerous gas into pipelines of refrigerant. In order to avoid
danger, it is better to use nitrogen or refrigerant to conduct the test.
10) As shown below, draw off the air inside the indoor unit, hydro box and connecting pipe
with vacuum pump from valve of outdoor unit.
GMV5 Home DC Inverter Multi VRF Units
328