Gree GWH18YD-K6DNA2A Service Manual page 37

Service Manual
Welding
●If you should cut or weld the refrigerant system pipes in the process of maintaining, please follow the steps as below:
a. Shut down the unit and cut power supply
b. Eliminate the refrigerant
c. Vacuuming
d. Clean it with N2 gas
e. Cutting or welding
f. Carry back to the service spot for welding
●Make sure that there isn't any naked flame near the outlet of the vacuum pump and it's well-ventilated.
●The refrigerant should be recycled into the specialized storage tank.
Filling the refrigerant
●Use the refrigerant filling appliances specialized for R32. Make sure that different kinds of refrigerant won't contaminate with
each other.
●The refrigerant tank should be kept upright at the time of filling refrigerant.
●Stick the label on the system after filling is finished (or haven't finished).
●Don't overfilling.
●After filling is finished, please do the leakage detection before test running; another time of leak detection should be done
when it's removed.
Safety instructions for transportation and storage
●Please use the flammable gas detector to check before unload and open the container.
●No fire source and smoking.
●According to the local rules and laws.
Installation and Maintenance
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