4■EnglishPrecautions on Installation• Check the strength and level of the installation surface so that the unit does notcause any operating vibrations or noise after installation.• Fix the unit in place securely using foundation bolts, as in the figure. (Prepare 4sets of 5/16 inch (M8) or 3/8 inch (M10) foundation bolts, nuts and washers; allseparately available.)• It is best to screw in the foundation bolts until their ends are 3/4 inch (20mm)from the foundation surface.3/4”(20mm)Outdoor Unit Installation DiagramIn sites with poor drainage,use block bases for theoutdoor unit.Adjust foot height until the unitis level. Otherwise, waterleakage or pooling of watermay occur.Appearance of outdoor units may differ from some models.O.D. 3/8 inch (9.5mm)Gas pipeLiquid pipe O.D. 1/4 inch (6.4mm)0.21oz/ft (20g/m)Max. allowable piping length49-1/4ft (15m) 39-3/8ft (12m)65-5/8ft (20m) 49-1/4ft (15m)Max. allowable piping heightAdditional refrigerant required for refrigerantpipe exceeding 32.8ft (10m) in length.*Be sure to add the proper amount of additional refrigerant.Failure to do so may result in reduced performance.**The suggested shortest pipe length is 10ft (3m), in order to avoidnoise from the outdoor unit and vibration.(Mechanical noise and vibration may occur depending on howthe unit is installed and the environment in which it is used.)10ft (3m)O.D. 1/2 inch(12.7mm)O.D. 5/8 inch(15.9mm)RX18∗, RXN18∗RK18∗, RKN18∗RXL15∗RX24∗, RXN24∗RK24∗, RKN24∗RX09/12∗RK09/12∗RXL09/12∗RXN09/12∗RKN09/12∗65-5/8ft (20m)98-1/2ft (30m)Min. allowable piping lengthX(Foot bolt-hole centers) (From unit’s side)Z(Foot bolt-holecenters)Y***Allow 11-13/16” (300mm)of work space below theceiling surface.Where there is a danger of the unitfalling, use foot bolts, or wires.18-1/2inch(470mm)23-5/8inch(600mm)12-1/8inch(308mm)13-5/8inch(346mm)3-13/16inch(97mm)4-15/16inch(125mm)15/18/24 class09/12 classX Y ZCAUTIONKeep the piping length between10ft (3m) and 65-5/8ft (20m)(for RX09/12, RK09/12, RXL09/12),10ft (3m) and 49-1/4ft (15m)(for RXN09/12, RKN09/12),10ft (3m) and 98-1/2ft (30m)(for 15/18/24 class).9-13/16 ” (250mm) from wallHow to remove the stopvalve cover1) Remove the screw on thestop valve cover.2) Slide the stop valve coverdownward to remove it.1) Insert the upper part ofthe stop valve cover intothe outdoor unit.2) Tighten the screw.How to attach the stopvalve coverStop valve coverWrap the insulation pipe withfinishing tape from bottom totop.Allow space for pipingand electrical servicing.English