English■7Indoor Unit InstallationCAUTIONWhen connecting the connection wire to the terminal block using a single core wire,be sure to perform curling.Problems with the installation may cause heat and fires.1) As shown in the illustration on the right-hand side, insert thewires including the ground wire into the conduit and securethem with lock nut onto the conduit mounting plate.2) Insert the wires including the ground wire into tube.3) Strip wire ends (9/16 inch (15mm)).4) Match wire colors with terminal numbers on indoor and outdoorunit’s terminal blocks and firmly screw wires to thecorresponding terminals.5) Connect the ground wires to the corresponding terminals.6) Pull the wires and check that the wires are securely fixed to theterminal block.7) In case of connecting to an adapter system, run the remotecontroller cable and attach the S21.(Refer to “4. When connecting to an HA system” on page 9.)8) Shape the wires so that the service lid fits securely, then close service lid.5. Drain piping1) Connect the drain hose, as described on the right.2) Remove the air filters and pour some water into the drain pan to check the waterflows smoothly.3) If drain hose extension or embedded drain piping is required, use appropriate partsthat match the hose front end.Figure of hose front end• When drain hose requires extension, obtain an extensionhose with an inner diameter of 5/8 inch (16mm).Be sure to thermally insulate the indoor section of theextension hose.• When connecting a rigid polyvinyl chloride pipe(nominal diameter 1/2 inch (13mm)) directly tothe drain hose attached to the indoor unit as withembedded piping work, use any commerciallyavailable drain socket (nominal diameter 1/2 inch(13mm)) as a joint.Good WrongConduitmounting plateLock nutBackConduitTerminal blockElectrical wiring boxUse the specified wire type.Wire retainerShape wires so thatthe service lid will fitsecurely.TubeKK1231 2 3 L1 L 2Wire size and length mustcomply with local codes.Firmly fix the wires withthe terminal screws. OutdoorunitIndoorunitFirmly fix the wires with the terminal screws.The drain hose shouldbe inclined downward.No trap is permitted.Do not put the endof the hose in water.ϕ11/16”(ϕ18mm)ϕ5/8”(ϕ16mm)Indoor unitdrain hoseExtension drain hoseHeat insulation tube (field supply)ϕ5/8”(ϕ16mm)Drain hose suppliedwith the indoor unitCommercially availabledrain socket(nominal diameter 1/2 inch(13mm))Commercially availablerigid polyvinyl chloride pipe(nominal diameter 1/2 inch(13mm))Drain hose supplied withthe indoor unit ϕ11/16”(ϕ18mm)