15EnglishInstallation2 Use a standard 65 mm hole saw to drill one hole at theselected location, at a 15° downward angle so that thedrain hose will drain properly.Drain hoseWallIndoor unit3 Based on the hole location, determine where the pipingbundle (drain hose, refrigerant pipes, and cables) will exitthe unit.LeftRightbottomRear right or leftNOTE• The left, right, or bottom exit will only be used if thehole is not positioned behind the unit.Step 2-3 Connecting the refrigerantpipesConnect indoor and outdoor units with field-supplied copperpipes by means of flare connections. Use insulated seamlessrefrigeration grade pipe only, (Cu DHP type according toISO1337), degreased and deoxidized, suitable for operatingpressures of at least 4200 kPa and for burst pressure of atleast 20700 kPa. Under no circumstances must sanitary typecopper pipe be used.IMPORTANT• When installing the unit, always connect therefrigerant pipes first, followed by the electrical cables.For disassembly, always disassemble the electric cablesbefore the refrigerant pipes.Two short refrigerant pipes are already attached to the airconditioner:• The smaller-diameter pipe is for the high-pressure,two-phase refrigerant.• The larger-diameter pipe is for the low-pressurerefrigerant vapor.Drain hose Refrigerantpipes(assembly pipe)Connection hoseIn Step 2-2, step 3 you determined the exit position for thepiping bundle. The unit has three knockouts available for theleft, right, and bottom exits. When the bundle exits directlyfrom the rear, none of the knockouts are used.1 If the pipes will exit directly from the rear, skip to step 3.Otherwise, cut out the appropriate knockout piece (left,right, or bottom).2 Use a razor knife to clean the cut edges (flashing).3 The left exit is the only position that does not requirebending the pipes. For other positions, bend the pipes sothat they will exit in the selected exit position.‐ The bending radius should be greater than 100 mm.‐ Bend the smaller pipe gradually to prevent kinking.The larger pipe has a preinstalled spring bender toprevent kinking.‐ Make sure that the pipes do not protrude from theback of the unit in a way that will make it difficult toattach the unit to the mounting bracket.‐ For right and bottom exits, pull the pipes out throughthe selected knockout opening. For left exits, thepiping connections will be made in the service spacebehind the indoor unit (under the cover panel).NOTE• If you are using the right rear exit, the pipes shouldbe long enough to extend through the wall withoutneeding to connect the line set first. It may be easierto connect the line set outside of the building, afteryou have bundled the pipes and cables and passed thebundle through the wall. In this case, do not connectthe line set now. Instead, complete Step 2-4 throughStep 2-7, then go outside and connect the line set asdescribed below.
