Haier AB072XCEAA Service Manual - Page 39

Chff^j\bZe Abj Chg]blbhg^j When installing the ceiling concealed type indoor unit, a specially designed return air bellows shall be installed, as shown in Figure 3, Figure 4. Figure 3 Installing building roof 0. 5m( 0Pa) or 5m( 50Pa) A Ceiling Unit Air supply Air outlet duct Return air bellows Return air Figure 4 Air outlet grille Return air bellows Air supply No obstacles within 1 m(0Pa) Unit Return air Each air return and supply duct should fix to the floor precast slab by using an iron stand. Use glue to seal the interface closely. Recommend the distance between the air return duct and the wall is more than 150mm. The distance between air duct outlet and air conditioner outlet is according to the length of actually installed air duct and in service behavior of the static pressure terminal: Installation sketch map for long and short air duct is showed below, when connect to short air duct, using low static terminal (terminal color is white), the distance between air duct outlet and air conditioner outlet is no more than 0.5m; when connect to long air duct, using middle static terminal (terminal color is red), the distance between air duct outlet and air conditioner outlet could be within 5m at this point. Figure 5 sling dog drain piping air return duct transition air outlet air return shutter air duct duct joint of air diffuser air diffuser Drain piping of condensed water should keep a downhill grade of 1% or more. Use insulating pipe to cover the drain piping of condensed water to keep warmth. As figure shown, suspend and install the unit. Figure 6 M8 broad foundation bolt M8 suspension screw Unit M8 broad lock ring M8 nut Figure 6 z 37 z