Haier HBU-14HC03 User Manual - Page 32

Installation Procedures For AB142ACBBA AU142AFBBA (HBU-14HC03/R1) , the refrigerant is R407C. To use vacuum pump 1 Detach the service port's cap of 3-way valve, the valve rod's cap for 2-way valve and 3-way's, 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 pipe 6.35mm(1/4'') Gas pipe 15.88mm(5/8'') Gaugemanifold 2 Open the handle at low in gaugemanifold, operate vacuum pump. If the scale-moves of gause (low) reach vacuum condition in a moment, check 1 again. 2 Open Vacuum pump 3 Vacuumize for over 15min. And check the level gauge which should read -0.1 MPa (-76 cm Hg) at low pressure side. After the completion of vacuumizing, close the handle 'Lo' in gaugemanifold and stop the operation of 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, the return to the beginning of 3 . 4 Open the valve rod for the 2-way valve to and angle of anticlockwise 90 degree. After 6 seconds later, close the 2-way valve and male the inspection of gas leakage. 3 Close 2-way valve 90 90 3-way valve Service port 4 90 for 6 sec. 5 No gas leakage? 6 In case of gas leakage, tighten parts of pipe connection. If leakage stops, then proceed 6 steps. If it does not stop gas leakage, discharge whole refrigerants from the serice port. After flaring work again and vacuumize, fill up prescribed refrigerant from the gas cylinder. Detach the charge hose from the service port, open 2-way valve and 3-way. Turn the valve rod anticlockwise until hitting lightly. 2-way valve 6 7 To prevent the gas leakage, turn the service port's cap, the valve rod'd cap for 2-way valve and 3-way's a lottle more than the point where the torque increases suddenly. 3-way valve 6 8 After attaching the each caps, check the gas leakage around the caps. 2-way valve CAUTION: If the refrigerant of the air conditioner leaks, it is necessary to make all the refrigerant out, then charge the liquid refrigerant into air conditioner according to the amount marked on the name plate. 3-way valve 7 Valve rod cap 7 Valve rod cap 7 Service port cap 30