Haier AU48NAIEAA User Manual - Page 9

Installation Procedure Refrigerant piping (2) Piping size AU182AEEAA AU242AGEAA AU282AGEAA AU28NAGEAA AU36NAHEAA AU362AHEAA AU48NAIEAA AU60NAIEAA Liquid pipe Gas pipe Liquid pipe Gas pipe Liquid pipe Gas pipe 6.35x0.8mm 12.7x1.0mm 9.52x0.8mm 15.88x1.0mm 9.52x0.8mm 19.05x1.0mm 90+0.5 Install the removed flare nuts to the pipes to be connected, then flare the pipes. (3) Limitations for one way piping length and vertical height difference. Model AU182AEEAA AU242AGEAA AU282AGEAA AU28NAGEAA AU36NAHEAA AU362AHEAA AU48NAIEAA AU60NAIEAA One way piping length less than 20 m Vertical height difference (between indoor and outdoor) less than 10 m less than 30 m less than 15 m less than 50 m less than 30 m Precautions for refrigerant piping Do not twist or crush piping. Be sure that no dust is mixed in piping. Bend piping with as wide angle as possible. Keep insulating both gas and liquid piping. Check flare-connected area for gas leakage. (4) Piping connection Connecting method (indoor unit) Apply refrigerant oil at half union as large and flare nut. To bend a pipe, give the roundness as possible not to crush the pipe. When connecting pipe, hold the pipe centre to centre then screw nut on by hand, refer to Fig. Be careful not to let foreign matters, such as sands enter the pipe. Forced fastening without centering may damage the threads and cause a gas leakage. Pipe dia Liquid pipe 6.35mm Liquid pipe 9.52mm Gas pipe 12.7mm Gas pipe 15.88mm Gas pipe 19.05mm Fastening torque 14.2-17.2N.m 32.7-39.9N.m 49.5-60.3N.m 61.8-75.4N.m 97.2-118.6N.m 8