Haier AU222XFERA User Manual - Page 12

Purging method: to use vacuum pump 1 .Detach the service portis cap of 3-way valve, the valve rod's cap for 2-way valve and 3-way valves, connect the service port into the projection of charge hose (low) for gaugemanifold. Then connect the projection of charge hose (center) for gaugemanifold into vacuum pump. 2 way valve 3 way valve Liquid stop valve Gas stop valve Gauge maifold(R410A) Vacuum pump(R410A) 2 .Open the handle at low in gaugemanifold, operate vacuum pump. If the scale-moves of gause (low) reach Open vacuum condition in a moment, check 1 again. 3 .Vacuumize for over 15min. And check the level gauge which should read -0.1MPa (-76 cm Hg) at low pressure side. After the completion of vacuumizing, close the handle 'Lo' in the vacuum pump. Check the condition of the scale and hold it for 1-2min. If the scale-moves back in spite of tightening, make flaring work again, then return to the beginning of 3 . 4 .Open the valve rod for the 2-way valve to and an angle of anticlockwise 90 degree. After 6 seconds, close the 2way valve and make the inspection of gas leakge. 5 .No gas leakage? In case of gas leakage, tighten parts of pipe connection. If leakage stops, then proceed 6 steps. 6 .Detach the charge hose from the service port, open 2way valve and 3-way. Turn the valve rod anticlockwise until hitting lightly. 7 .To prevent the gas leakage, turn the service ports cap, the valve rodis cap for 2-way valve and 3-way's a little more than the point where the torque increases suddenly. CAUTION: If the refrigerant of the air conditioner leaks, it is necessary to make all the refrigerant out. Vacuumize first, then charge the liquid refrigerant into air conditioner according to the amount marked on the name plate. 10 Close 2 way valve 900 3 way valve Service port 900 for 6 sec. If it does not stop gas leakage, discharge whole refrigerants from the service port. After flaring work again and vacuumize, fill up prescribed refrigerant from the gas cylinder. 2 way valve 6 3 way valve 6 2 way valve 3 way valve Valve rod cap Valve rod cap Service port cap 2 way valve 3 way valve 2 way valve 3 way valve 2 way valve 90o 10s 3 way valve 6.35mm To indoor unit A (1/4") 9.52mm (3/8") 6.35mm To indoor unit B (1/4") 9.52mm (3/8") 6.35mm To indoor unit C (1/4") 9.52mm (3/8")