Haier AD88NAHAAA Operation And Instruction Manual

27INSTALLATION MANUAL FOR INDOOR UNITStraight partBend partAir out partStatic pressure boxAir inlet grille (with air filter)Calculate as per 1m length 1Pa, 1Pa/mEach bend takes as a3~4m long straight ductCalculate as 25PaCalculate as 50Pa/eachCalculate as 40Pa/eachGood exampleBad exampleBad exampleThe length difference among every duct is limited below 2:1.Reduce the length of duct as possible as can.Reduce the amount of bend as possible as can.Use heat insulation material to bind and seal the part connecting main unit and the flare part of airdischarging duct. Perform duct installation work, before the fitment of ceiling.7. Calculation method of the dimension of the simple quadrate air ductPresuming the unit length friction impedance of the duct is 1Pa/m, when the dimension of one side ofthe air duct is fixed as 250mm, as shown below:Note:1Pa/m=0.1mmAg/mThe chosen chart of simple ductm3/h(m3/n)100200300400500600(10)8001,0001,200(20)250 x 60(mmxmm)250 x 90250 x 120250 x 140250 x 170250 x 190250 x 230250 x 270250 x 310ShapeItemAir volumeSquare ductDimensionm3/h(m3/n)1,4001,6001,800(30)200024003,000(50)3,5004,0004,5005,0005,5006,000(100)(mmxmm)250 x 350250 x 390250 x 430250 x 470250 x 560250 x 650250 x 740250 x 830250 x 920250 x 1000250 x 1090250 x 1180ShapeItemAir volumeSquare ductDimensionStatic pressure boxAir conditionerEquipped withair filter (bought)BAAA600m3/h(10m3/min)Duct(mmxmm)2400m3/h(40m3/min) 250x560250x190Air volumeBA300m3/h(5m3/min)Duct(mmxmm)1200m3/h(20m3/min) 250x310250x120Air volumeAD242AHAAAAU242AOAAA(HDU-24H03/H)AD42NAHAAAAU42NAQAAA(HDU-42H03/H)The calculation of duct resistance (the simple calculation is as follow table)