Daikin FNA25A2VEB Installer's Reference Manual

Also see for FNA25A2VEB: Installation manual Operation manual Installer's reference guide

Contents

6 InstallationInstaller reference guide16FNA25~60A2VEBSplit system air conditioners4P482940-1 – 2017.06c Insulation pieces: Large (gas pipe), small (liquid pipe)(accessories)d Flare nut (attached to the unit)e Refrigerant pipe connection (attached to the unit)f Unitg Sealing pads: Medium 1 (gas pipe), medium 2 (liquid pipe)(accessories)1 Turn up the seams of the insulation pieces.2 Attach to the base of the unit.3 Tighten the cable ties on the insulation pieces.4 Wrap the sealing pad from the base of the unit to the top ofthe flare nut.NOTICEMake sure to insulate all refrigerant piping. Any exposedpiping might cause condensation.6.4 Connecting the electrical wiring6.4.1 About connecting the electrical wiringTypical workflowConnecting the electrical wiring typically consists of the followingstages:1 Making sure the power supply system complies with theelectrical specifications of the units.2 Connecting the electrical wiring to the outdoor unit.3 Connecting the electrical wiring to the indoor unit.4 Connecting the main power supply.6.4.2 Precautions when connecting theelectrical wiringINFORMATIONAlso read the precautions and requirements in thefollowing chapters:▪ General safety precautions▪ PreparationDANGER: RISK OF ELECTROCUTIONWARNINGALWAYS use multicore cable for power supply cables.WARNINGIf the supply cord is damaged, it must be replaced by themanufacturer, its service agent or similarly qualifiedpersons in order to avoid a hazard.6.4.3 Guidelines when connecting the electricalwiringKeep the following in mind:▪ If stranded conductor wires are used, install a round crimp-styleterminal on the end of the wire. Place the round crimp-styleterminal on the wire up to the covered part and fasten the terminalwith the appropriate tool.b aa Stranded conductor wireb Round crimp-style terminal▪ Use the following methods for installing wires:Wire type Installation methodSingle-core wirec bcaaA AA´A´a Curled single-core wireb Screwc Flat washerStranded conductorwire with roundcrimp-style terminalc b ba caBBa Terminalb Screwc Flat washerO AllowedX Not allowedTightening torquesWiring Screw size Tightening torque(N•m)Interconnectioncable(indoor↔outdoor)M4 1.18~1.44User interface cable M3.5 0.79~0.97▪ If single-core wires are used, be sure to curl the end of the lead.Improper work may cause heat or fire.▪ The earth wire between the pull relief and the terminal must belonger than the other wires.6.4.4 To connect the electrical wiring on theindoor unitIt is important to keep the power supply and the transmission wiringseparated from each other. In order to avoid any electricalinterference the distance between both wiring should always be atleast 50 mm.NOTICEBe sure to keep the power line and transmission line apartfrom each other. Transmission wiring and power supplywiring may cross, but may not run parallel.1 Remove the service cover.