4. Installation of indoor unitFix the indoor unit to the hanger bolts.If required, it is possible to suspend the unit to the beam, etc.Directly by use of the bolts without using the hanger bolts.When the dimensions of main unit and ceiling holes does not match, it can be adjusted with the slot holesof hanging bracket.NoteAdjusting to the levelness(a) Adjust the out-of levelness using a level or bythe following method.Make adjustment so that the relation betweenthe lower surface of the unit proper and waterlevel in the hose becomes as given below.(b) Unless the adjustment to the levelness is made properly, malfunctioning or failure of the floatswitch may occur.PVC hosePiping sideSupply waterWater level0~5 mm(0~0.2")Bring the piping side slightly lower.Hanging boltM10 nutMain unitM10 washerM10 spring washerDrain hoseStagedifferencepartDrain socketDrain socketMain unitVP 25 joint(field purchased)Pipe cover(large)[for insulation](accessory)VP 25(field purchased)Pipe cover[for insulation](field purchased)Drain hose(accessory)Pipe cover(small)[for insulation](accessory)Clamp(accessory) AdhesionFor drain pipe, use hard PVC general purpose pipeVP-25(I.D.1") which can be purchased locally. Whenconnecting, insert a PVC pipe end securely into thedrain socket before tightening securely using theattached drain hose and clamp. Adhesive must notbe used connection of the drain socket and drainhose (accessory).(c)5. Drain Piping(a) Drain piping should always be in a downhill grade (1/50~1/100) and avoid riding across anelevation or making traps.When connecting the drain pipe to unit, pay suffcient attention not to apply excess force to the pipingon the unit side. Also, fix the piping at a point as close as possible to the unit.Do not pipe under waterKeep free from trapsAvoid riding across an elevationAir ventInproper pipingGood piping1.5m ~ 2mSuspensionboltsHeatinsulationA downhill gradeof 1/100 or more(b)Installation Manual For Indoor Unit26