Haier HDU-28CM03 User Manual - Page 30
Drain Piping
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INSTALLATION MANUAL FOR INDOOR UNIT (5) Installation of indoor unit Fix 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. M10 nut Main unit Hanging bolt M10 washer M10 spring washer Note When the dimensions of main unit and ceiling holes does not match, it can be adjusted with the slot holes of hanging bracket. Adjusting to the levelness (a) Adjust the out-of levelness using a level or by the following method. Piping side Supply water Water level Make adjustment so that the relation between the lower surface of the unit proper and water level in the hose becomes as given below. 0~5 mm (0~0.2") PVC hose Bring the piping side slightly lower. (b) Unless the adjustment to the levelness is made properly, malfunctioning or failure of the float switch may occur. Tap selection on blower unit (When the high performance filter is used.) Taps of blower unit are set at the standard selection at the shipping from factory. Where the static pressure is raised by employing such option as the high performance filter, etc., change the connection of connectors provided at the flank of control box as shown below. Control box side Connector white White Moter side Connector white Red Moter side Standard tap (at shipping) White White Blue Blue Yellow Yellow Red Red High speed tap White Black Blue White Yellow Blue Red Red (6) Drain Piping (a) Drain piping should always be in a downhill grade (1/50~1/100) and avoid riding across an elevation or making traps. Good piping Suspension bolts 1.5m ~ 2m Inproper piping Avoid riding across an elevation Air vent Keep free from traps Heat A downhill grade insulation of 1/100 or more (b) When connecting the drain pipe to unit, pay suffcient attention not to apply excess force to the piping on the unit side. Also, fix the piping at a point as close as possible to the unit. (c) For drain pipe, use hard PVC general purpose pipe VP-25(I.D.1") which can be purchased locally. When connecting, insert a PVC pipe end securely into the drain socket before tightening securely using the attached drain hose and clamp. Adhesive must not be used connection of the drain socket and drain hose (accessory). 29 Do not pipe under water Stage difference Drain hose Drain socket part Drain socket Main unit Pipe cover(large) [for insulation] (accessory) VP 25 joint (field purchased) Drain hose Clamp (accessory) (accessory) Adhesion Pipe cover(small) [for insulation] (accessory) VP 25 (field purchased) Pipe cover [for insulation] (field purchased)