Haier AU42NAIBEA User Manual - Page 9

Installation Procedure Refrigerant piping (2) Piping size AU142AFBEA AU182AFBEA AU242AHBEA AU282AHBEA AU28NAHBEA AU36NAIBEA AU42NAIBEA AU52NAIBEA Liquid pipe Gas pipe Liquid pipe Gas pipe Liquid pipe Gas pipe Liquid pipe Gas pipe 6.35x0.8mm 12.7x1.0mm 6.35x0.8mm 15.88x1.0mm 9.52x0.8mm 15.88x1.0mm 9.52x0.8mm 90+0.5 Install the removed flare nuts to the pipes to be connected, then flare the pipes. 19.05x1.0mm (3) Limitations for one way piping length and vertical height difference. Model One way piping length AU142AFBEA AU182AFBEA AU242AHBEA AU282AHBEA AU28NAHBEA AU36NAIBEA AU42NAIBEA AU52NAIBEA less than 40 m less than 50 m Precautions for refrigerant piping Vertical height difference (between indoor and outdoor) less than 15 m less than 30 m 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. 8 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