Haier 2U50S2SM1FA-3 Installation Manual

Also see for 2U40MEFFRA: Installation manual

1.In order to connect to 5kw indoor units, you need a pipe adapter,the diameter size is shown on the drawing:12.7The values of The piping size are shownin table 42. Connection of pipesTo bend a pipe, give the roundness as large as possible not to crush the pipe ,and the bending radius should be 30 to 40 mm or longer.Connecting the pipe of gas side rst makes working easier.The connection pipe is specialized for R32.Half union Flare nut Forced fastening without careful centering maydamage the threads and cause a leakage of gas.Pipe Diameter( ) Fastening torqueLiquid side6.35mm(1/4") 18 20N.mLiquid/Gas side9.52mm(3/8") 30 35N.mGas side 12.7mm(1/2") 35 45N.mSpanner Torque wrench Gas side 15.88mm(5/8") 45 55N.mBe careful that matters, such as wastes of sands,water,, etc. shall not enter the pipe.CAUTIONThe standard pipe length is C m. If it is over D m, the function of the unit will be affected. If the pipe hasto be lengthened, the refrigerant should be charged, according to E g/m. But the charge of refrigerantmust be conducted by professional air conditioner engineer. Before adding additional refrigerant,perform air purging from the refrigerant pipes and indoor unit using a vacuum pump,then chargeadditional refrigerant.CAUTIONIndoor unit Indoor unitB1 B1B1 A1 B2 Indoor unit Outdoor unitA1Indoor unit A2 A3A2 Indoor unitB2Outdoor unit Outdoor unit Indoor unitB2Indoor unit Max.Elevation: A1 max =15m A2 max =15mA3 max =15mIn case the elevation B is more than 5m,oil trap shoud be installed every 5~7mOutdoor unitB Oil trapMax. Length: B1 max =20m B2 max =20mIndoor unit (B1+B2) max =30mMin. Length: B1 min =3m B2 min =3mIn case the pipe total length (B1+B2) is more than20m, the refrigerant should be charged, accordingto 20 g/m.21