Daikin FXFQ20BVEB Installation And Operation Manual

Also see for FXFQ100BVEB: Installer and user reference guide Installation and operation manual

Contents

4 InstallationInstallation and operation manual6FXFQ20~125BVEBVRV system air conditioner4P540926-1B – 2019.01▪ Level. Make sure the unit is level at all 4 corners using a level or awater-filled vinyl tube.cbbaa Levelb Vinyl tubec Water levelNOTICEDo NOT install the unit tilted. Possible consequence: Ifthe unit is tilted against the direction of the condensate flow(the drain piping side is raised), the float switch mightmalfunction and cause water to drip.4.1.2 Guidelines when installing the drainpipingMake sure condensation water can be evacuated properly. Thisinvolves:▪ General guidelines▪ Connecting the drain piping to the indoor unit▪ Checking for water leaksGeneral guidelines▪ Pipe length. Keep drain piping as short as possible.▪ Pipe size. Keep the pipe size equal to or greater than that of theconnecting pipe (vinyl pipe of 25 mm nominal diameter and32 mm outer diameter).▪ Slope. Make sure the drain piping slopes down (at least 1/100) toprevent air from being trapped in the piping. Use hanging bars asshown.1~1.5 m aa Hanging barO AllowedX Not allowed▪ Rising piping. If necessary to make the slope possible, you caninstall rising piping.▪ Drain hose inclination: 0~75 mm to avoid stress on the pipingand to avoid air bubbles.▪ Rising piping: ≤300 mm from the unit, ≤675 mm perpendicularto the unit.≤675≤3000~751000~1500(mm)bab ca dda Metal clamp (accessory)b Drain hose (accessory)c Rising drain piping (vinyl pipe of 25 mm nominal diameterand 32 mm outer diameter) (field supply)d Hanging bars (field supply)▪ Condensation. Take measures against condensation. Insulatethe complete drain piping in the building.▪ Combining drain pipes. You can combine drain pipes. Makesure to use drain pipes and T-joints with a correct gauge for theoperating capacity of the units.≥100≤675(mm)aa T-jointTo connect the drain piping to the indoor unitNOTICEIncorrect connection of the drain hose might cause leaks,and damage the installation space and surroundings.1 Push the drain hose as far as possible over the drain pipeconnection.2 Tighten the metal clamp until the screw head is less than 4 mmfrom the metal clamp part.3 Check for water leaks (see "To check for water leaks" onpage 6).4 Install the insulation piece (drain pipe).5 Wind the large sealing pad (= insulation) around the metalclamp and drain hose, and fix it with cable ties.6 Connect the drain piping to the drain hose.≤4 mmAA'A-A'AA'f 652ce4ba dbadc 312~61a Drain pipe connection (attached to the unit)b Drain hose (accessory)c Metal clamp (accessory)d Large sealing pad (accessory)e Insulation piece (drain pipe) (accessory)f Drain piping (field supply)To check for water leaksThe procedure differs depending on whether electrical wiring isalready finished. When electrical wiring is not finished yet, you needto temporarily connect the user interface and power supply to theunit.When electrical wiring is not finished yet1 Temporarily connect electrical wiring.