Daikin FDXM25F3V1B9 Installation Manual

Also see for FDXM25F3V1B9: Installer's reference guide User reference guide

Contents

Daikin FDXM25F3V1B9 Installation Manual Manual pdf 8 page image

5 InstallationInstallation manual8FDXM25~60F3V1B(9)Split system air conditioners4P472267-1B – 2018.07c Bucketd Refrigerant pipese Drain outlet5.2 Connecting the refrigerant pipingDANGER: RISK OF BURNING5.2.1 To connect the refrigerant piping to theindoor unitCAUTIONInstall refrigerating pipe or components in a position wherethey are unlikely to be exposed to any substance whichmay corrode refrigerant containing components, unless thecomponents are constructed of materials which areinherently resistant to being corroded or are suitablyprotected against being so corroded.WARNING: FLAMMABLE MATERIALThe R32 refrigerant (if applicable) in this unit is mildlyflammable. Refer to the outdoor unit specifications for thetype of refrigerant to be used.▪ Pipe length. Keep refrigerant piping as short as possible.▪ Flare connections. Connect refrigerant piping to the unit usingflare connections.▪ Insulation. Insulate the refrigerant piping on the indoor unit asfollows:A Ba dc e fb b a dc e fb b243 g 1 23 4gAB1A Gas pipingB Liquid pipinga Insulation material (field supply)b Cable tie (accessory)c 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.5.2.2 To check for leaksNOTICEDo NOT exceed the unit's maximum working pressure (see"PS High" on the unit name plate).NOTICEMake sure to use a recommended bubble test solutionfrom your wholesaler. Do not use soap water, which maycause cracking of flare nuts (soap water may contain salt,which absorbs moisture that will freeze when the pipinggets cold), and/or lead to corrosion of flared joints (soapwater may contain ammonia which causes a corrosiveeffect between the brass flare nut and the copper flare).1 Charge the system with nitrogen gas up to a gauge pressure ofat least 200 kPa (2 bar). It is recommended to pressurize to3000 kPa (30 bar) in order to detect small leaks.2 Check for leaks by applying the bubble test solution to allconnections.3 Discharge all nitrogen gas.5.3 Connecting the electrical wiringDANGER: 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.5.3.1 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 wirings should ALWAYS beat least 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.a c bdA Befeg gA Outside the unitB Inside the unita Control box coverb Connection of interconnection cable (including earth)c Wiring diagramd Connection of user interface wiringe Sealing material (accessory)f Opening for cablesg Wire2 User interface cable: Route the cable through the frame,connect the cable to the terminal block, and fix the cable with acable tie.3 Interconnection cable (indoor↔outdoor): Route the cablethrough the frame, connect the cable to the terminal block(make sure the numbers match with the numbers on theoutdoor unit, and connect the earth wire), and fix the cable witha cable tie.