Gree GRS-CQ10Pd/NhH-E - Refrigerant Management and Control; Refrigerant Charging and Discharging

Air-to-water Heat Pump Split Versati
29
SPLIT TYPE
14. Gate-controller
If there is gate control function, installation guide follow as:
13 14
Gate-controller
220~50Hz
XT3
15. Charging and Discharging of Refrigerant
(1) 

(2) Check the liquid valve and the gas valve of the outdoor unit. The valves shall be completely shut off.
(3) Connect a vacuum pump to the liquid valve and the gas valve of the outdoor unit to remove air from the

Pressure meter
“HI”knob
Vacuum pump
“Lo”knob
Liquid valve
Gas valve
Connection pipe
Pressure meter
(4) 

valve of the outdoor unit.
Ь
Be sure to charge the specified amount of refrigerant in liquid state to the liquid pipe. Since this
refrigerant is a mixed refrigerant, adding it in gas form may cause the refrigerant composition to change,
preventing normal operation.
Ь
Before charging, check whether the refrigerant cylinder is equipped with a siphon tube or not.
With siphon tube No siphon tube
WARNING
• 
NOTE
• Do not use mixture of refrigerant vapor and air or oxygen for pressurizing for fear of explosion.