Daikin EKHBX030BA Installation Manual

Also see for EKHBH030BA: Operation manual

Installation manual18 EKHBH/X030BAIndoor unit for air to water heat pump system4PW62568-1 – 07.2010Internal wiring - Parts tableRefer to the internal wiring diagram supplied with the unit (on theinside of the indoor unit switch box cover). The abbreviations usedare listed below.A1P ................. Main PCBA2P ................. Digital controller PCB (user interface)A3P ......... * ..... Thermostat (EKRTWA) (PC= internal Power Cicuit)(optional)A4P ......... * ..... Digital I/O PCB (EKRP1HB) (optional)E1H ................. Backup heater element 1E2H ................. Backup heater element 2E4H ......... # ..... Booster heater (3 kW)F1B,F3B .......... Fuse backup heaterF2B.......... # ..... Fuse booster heaterF1T.................. Thermal fuse backup heater (250 V, 201.2°F (94°C))FU1 ................. Fuse 3.15 A T 250 V for PCBFU2 ................. Fuse 5 A T 250 VFU3 ................. Fuse 1 A T 250 VFuR,FuS.......... Fuse 5 A 250 V for digital I/O PCBK1A~K4A......... Relays for valves and thermostatK5A~K7A......... Relays for digital I/O PCB kitK1M................. Contactor backup heater step 1K2M................. Contactor backup heater step 2K3M......... # ..... Contactor booster heaterK5M,K6M ........ Contactor for backup heater all pole disconnectionM1P................. PumpM2S.......## ..... 2-way valve for cooling mode (field supply)M3S......... # ..... 3-way valve: floor heating/domestic hot waterPHC1............... Optocoupler input circuitQ1DI................ Ground fault circuit interrupter (field supply)Q1L ................. Thermal protector backup heaterQ2L,Q3L..# ..... Thermal protector booster heaterR1T ......... * ..... Ambient sensor (EKRTWA) (optional)R1T ................. Outlet water heat exchanger thermistorR2T ................. Outlet water backup heater thermistorR3T ................. Refrigerant liquid side thermistorR4T ................. Inlet water thermistorR5T .........# ..... Domestic hot water thermistorS1L.................. Flow switchS1S ................. Solar pump station relayS2S ................. Benefit kWh rate power supply contactS3S ................. Dual set point 2 contactS4S ................. Dual set point 1 contactSS1 ................. DIP switchTR1,TR2.......... Transformer 24 V for PCB, for relays and valvesX1M~X9M ....... Terminal blocksField wiring guidelines■ Most field wiring on the indoor unit side is to be made on theterminal block inside the switch box. To gain access to theterminal block, remove the indoor unit cover and switch boxservice panel, see "Opening the indoor unit" on page 9.■ Cable tie mountings are provided at the bottom of the switchbox. Fix all cables using cable ties (field supply).■ A dedicated power circuit is required for the backup heater.■ Installations equipped with a domestic hot water tank (optional),require a dedicated power circuit for the booster heater.Please refer to the domestic hot water tank installation manual.Connection of the indoor unit power supply andcommunication cablePower circuit and cable requirementsPower supply for the indoor unit is to be provided through the outdoorunit. Data communication with the outdoor unit is provided throughthe same cable.For all guidelines and specifications regarding field wiring betweenthe indoor unit and the outdoor unit, please refer to the outdoor unitinstallation manual.Procedure1 Using the appropriate cable, connect the communication circuitto the appropriate terminals as shown on the wiring diagram andthe illustration below.2 Connect the ground conductor (yellow/green) to the groundingscrew on the switch box mounting plate.3 Fix the cable with cable ties to the cable tie mountings to ensurestrain relief.4 When routing out cables, make sure that these do not obstructmounting of the indoor unit cover, see figure 3.5 Select the appropriate field setting values for the bottom plateheater. See "[F-02]", "[F-03]", and "[F-04]" on page 34.Note: only relevant field wiring is shown.WARNINGAfter finishing the electric work, confirm that each electricpart and terminal inside the electric parts box is connectedsecurely.* Optional# Applications with domestic hot water tank only## Heating/cooling applications onlyWARNINGSwitch off all power supply – i.e. outdoor unit powersupply and backup heater and domestic hot watertank power supply (if applicable) – before removingthe switch box service panel.X1Y Bottom plate heaterX3MX1MX1YX2M1 2 31 321 21 21 2 31515a