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2. Four-way cassette type1. Decide the correct carry-in path.2. Move this unit as originally packaged as possible.3. If the air conditioner is installed on a metal partof the building, it must be electrically insulatedaccording to the relevant electrical code.4. If installing in a lonely building or at a high positionwhere it is hot and humid with frequent thunder-storm, lightning-protection equipment is necessary.Notes before installation1. Install the main bodyA. The existing ceiling (to be horizontal)a. Please cut a quadrangular hole of 600×600mmin the ceiling according to the shape of theinstallation paper board. (Refer to Fig.15 & 16)The center of the hole should be at the sameposition of that of the air conditioner body.Determine the lengths and outlets of the conn-ecting pipe, drain pipe and cables.To balance the ceiling and to avoid vibration,please enforce the ceiling when necessary.b. Please select the position of installation hooksaccording to the hook holes on the installationboard.Drill four holes of 12mm, 50~55mm deep at theselected positions on the ceiling. Then embedthe expansible hooks(fittings).Face the concave side of the installation hookstoward the expansible hooks. Determine thelength of the installation hooks from the heightof ceiling, then cut off the unnecessary part.If the ceiling is extremely high, please determinethe length of the installation hook according tofacts.Cut the installation hook open in the middleposition, then use apropriate length of reinforcingrod ( 12) to weld together.Indoor unit installation9INSTALLATION INSTRUCTIONSPlease check whether the following fittings are of full scope. If there are some attached fittings freefrom use, please restore them carefully.11. Expansible hook..............................412. Installation hook..............................48. Installation paper board.....................113. Orifice................. ....1........................Attached fittings9. Soundproof / insulation sheath ......1...10. Seal ring ... ...1... .................................3. Remote controller.................. .........1..14. Frame.............................................115. Mounting screw(ST2.9×10-C-H) ...24. Alkaline dry batteries (AM4)............21.Installation manual.................................1A 280Necessary roomFig.13Fig.14GroundOutletOutlet>2300 InletFig.15(on some models)>1000>1000>1000>10002.Owner's ............. ....................1manual ....5.Out-let pipe sheath. ...1..........................6.Out-let pipe Clasp.................................17.Drain joint..............................................1(on some models)