23EnglishInstallation ProcedureStep 4 Installing the drain hose anddrain pipe1 Push the supplied drain hose as far as possible overthe drain socket.2 Tighten the metal clamp as shown in the picture.3 Wrap the supplied large sealing pad over the metalclamp and drain hose to insulate and fix it withclamps.4 Insulate the complete drain piping inside the building(field supply).If the drain hose cannot be sufficiently set on a slope,fit the hose with drain raising piping (field supply).5 Push the drain hose up to insulation when connectingthe drain hose to drain socket.Metal clamp Drain socketDrain hoseLarge seailng pad Be sure to bond the drainhose and the main pipe.Drain pipeDrain hosePVC Tube Joint+ VP25 (OD: 32 mm, ID: 25 mm)Drain pipeCAUTIONCheck that the indoor unit is level with the ceiling byusing the leveller.• Install air ventilation to drain condensation smoothly.Air ventilationCeiling• If it is necessary to increase the height of the drainpipe, install the drain pipe straight within 300 mmfrom the drain hose port. If it is raised higher than 550mm, there may be water leaks.Band joint300 mm orless300 to 550 mm20 mm or more1/100 or moreDrain hoseCeiling• Do not give the hose an upward gradient beyond theconnection port. This will cause water to flow backwardswhen the unit is stopped, resulting in water leaks.Under gradientCeiling• Do not apply force to the piping on the unit side whenconnecting the drain hose. The hose should not beallowed to hang loose from its connection to the unit.Fasten the hose to a wall, frame or other support asclose to the unit as possible.Support pieces1 to 1.5 m1/100 or moreCeiling