• VRV ® Systems • Indoor Units 15• Indoor Units • CEILING MOUNTED CORNER CASSETTE • FXKQ-MAVE11 Installation11 - 1 Drainage instructionsRig the drain pipe as shown below and take measures againstcondensation. Improperly rigged piping could lead to leaks andeventually wet furniture and belongings.Install the drain pipes.• Keep piping as short as possible and slope it downwards so thatthe air does not remain trapped inside the pipe.• The diameter of the drain pipe should be larger than or equal tothe diameter of the connecting pipe (Vinyl tube; pipe size: 25 mm;outer dimension: 32 mm).• Use the attached drain hose and clamp metal. Insert the drain hoseinto the drain socket, up to the white tape. Tighten the clamp untilthe screw head is less than 4 mm from the hose.• Wrap the attached sealing pad over the clamp and drain hose toinsulate.• Insulate the drain hose inside the building.• Insulate the clamp and drain hose with the attached large sealingpad. If the drain hose cannot be sufficiently set on a slope, executethe drain raising piping. Secure a downward gradient of 1/100 ormore for the drain pipe. To accomplish this, mount supportingbrackets at an interval of 1 - 1.5 m.Precautions when installing drain-up piping.• Make sure the drain-up piping is maximum 330 mm high. Installthe drain-up piping horizontally, and make sure it is not furtherthan 300 mm from the base of the drain socket.• Use the following outline if installing concentrated drain piping. Ifconverging multiple drain pipes, install according to the procedureshown on the right.Select converging drain pipes whose gauge is suitable for the operating capacity of the unit.CAUTION1 Installing the unit at an angle opposite to the drain piping mightcause leaks.Clamp metalClamp metal(attached)Large sealing pad(attached)Tape (white)< 4 mmDrain hoseCeiling slabClamp metal (attached) Drain hose (attached)Riser< 300< 5001701-1.5 mDrain-up pipingSupport bracketAdjustable (< 330)> 100 mmT-joint converging drain pipes