Haier 1U71S2SG1FA Service Manual

Also see for 1U71S2SG1FA: Installation manual Service manual Installation manual

Contents

89Drainage Test(1) Conduct a drainage test after completion of the electrical work.(2) During the trial, make sure that drain flows properly through the pipingand that no water leaks from connections.(3) In case of a new building, conduct the test before it is furnished with theceiling.(4) Be sure to conduct this test even when the unit is installed in theheating season.Proce dures(a) Supply about 1000 cc of water to the unit through the air outlet using afeed water pump.(b) Check the drain while cooling operation.Before the electrical work has not been completed, connect a convexjoint in the drain pipe connection to provide a water inlet. Then, checkif water leaks from the piping system and that drain flows throughthe drain pipe normally.Installation work for air outlet ductsCalculate the draft and external static pressure and select the length,shape and blowout.• Blowout duct• 2-spot, 3-spot and 4-spot with φ200 type duct are the standardspecifications.Note (1) Shield the central blowout hole for 2-spot.(2) Shield the blowout hole around the center or 3-spot.• Limit the difference in length between spots at less than 2:1.• Reduce the length of duct as much as possible.• Reduce the number of bends as much as possible. (Corner R should beas larger as possible.)• Use a band. etc. to connect the main unit and the blowout duct flange.• Conduct the duct installation work before finishing the ceiling.Connection of suction, exhaust ductsa.Fresh air inlet• Inlet can be selected from the side or rear faces depending on theworking conditions.• Use the rear fresh air inlet when the simultaneous intake and exhaust isconducted. (Side inlet cannot be used.)b.Exhaust (Make sure to use also the suction.)• Use the side exhaust port.