Daikin VRV IV W+ Series Installation And Operation Manual

Also see for RWEYQ10T9Y1B: Installer and user guide Installation and operation manual Installer and user reference guide

15 Electrical installationInstallation and operation manual28RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452190-1D – 2020.10NOTICEApplicable legislation on fluorinated greenhouse gasesrequires that the refrigerant charge of the unit is indicatedboth in weight and CO2 equivalent.Formula to calculate the quantity in CO2 equivalenttonnes: GWP value of the refrigerant × total refrigerantcharge [in kg] / 1000Use the GWP value mentioned on the refrigerant chargelabel.2 Fix the label on the inside of the outdoor unit near the gas andliquid stop valves.14.6 Connecting water piping14.6.1 About connecting the water pipingBefore connecting the water pipingMake sure the outdoor and indoor units are mounted.Typical workflowConnecting the water piping typically consists of the followingstages:1 Connecting the water piping of the outdoor unit.2 Filling the water circuit.3 Insulating the water piping.14.6.2 To connect the water pipingaba Cooling water outletb Cooling water inletConsult "14.2.1 Water circuit requirements" [4 19] for the correcttightening torque of the water piping connections.14.6.3 To fill the water circuit1 Connect the water supply hose to the fill valve (field supply).2 Open the fill valve.3 Run the pump ONLY and make sure that no air has beencaught in the water circulation system otherwise the plate heatexchanger will freeze.4 Check if the water flow rate is correct, otherwise the plate heatexchanger will freeze. Measure any water pressure loss beforeand after running the pump and make sure that the flow rate iscorrect. If not, stop the pump immediately and carry outtroubleshooting.14.6.4 To insulate the water pipingThe outdoor water piping MUST be insulated to preventcondensation during heating operation or to protect against freezingat cold ambient temperatures.See "14.2.1 Water circuit requirements" [419] for more information.15 Electrical installationDANGER: RISK OF ELECTROCUTIONWARNINGALWAYS use multicore cable for power supply cables.15.1 Safety device requirementsThe power supply must be protected with the required safetydevices, i.e. a main switch, a slow blow fuse on each phase and anearth leakage protector in accordance with the applicable legislation.For standard combinationsSelection and sizing of the wiring should be done in accordance withthe applicable legislation based on the information mentioned in thetable below.Model MinimumcircuitampacityRecommendedfusesRWEYQ8T9 15.5 A 20 ARWEYQ10T9 16.4 A 20 ARWEYQ12T9 19.4 A 25 ARWEYQ14T9 22.3 A 25 ARWEYQ16T9 31.0 A 32 ARWEYQ18T9 31.9 A 32 ARWEYQ20T9 32.7 A 35 ARWEYQ22T9 35.8 A 40 ARWEYQ24T9 38.9 A 40 ARWEYQ26T9 41.7 A 50 ARWEYQ28T9 44.6 A 50 ARWEYQ30T9 49.1 A 50 ARWEYQ32T9 52.2 A 63 ARWEYQ34T9 55.3 A 63 ARWEYQ36T9 58.3 A 63 ARWEYQ38T9 61.2 A 63 ARWEYQ40T9 64.0 A 80 ARWEYQ42T9 66.9 A 80 AFor all models:▪ Phase and frequency: 3N~ 50 Hz▪ Voltage: 380~415 V▪ Transmission line section: 0.75~1.25 mm2, maximum length is1000 m. If the total transmission wiring exceeds these limits, itmay result in communication error.For free combinationsCalculate the recommended fuse capacity.Formula Calculate, by adding the minimum circuit amps of eachused unit (according to the table above), multiply theresult by 1.1 and select the next higher recommendedfuse capacity.