Installation manual3 EKHBX008BB3V3SIndoor unit for air to water heat pump system4PW62597-1 – 10.20103. INTRODUCTION3.1. General informationThank you for purchasing this indoor unit.The unit is the indoor part of the air to water ERHQ or ERLQ heatpumps. This unit is designed for wall mounted indoor installation. See"6.1. Selecting an installation location" on page 12. The unit can becombined with Daikin fan coil units, floor heating applications, lowtemperature radiators, Daikin domestic water heating applicationsand Daikin solar kit for domestic hot water applications.For installations with restricted power supply, the indoor unit can beconfigured to limit the power consumption.There are 2 possibilities to limit the power consumption:■ allow simultaneous operation of outdoor unit and backup heateronly or outdoor unit and booster heater only by priority setting[4-01] (see "[4] Backup/booster heater operation and spaceheating off temperature" on page 28),■ allow operation of backup heater only, booster heater only oroutdoor unit only (see "Appendix" on page 50) by [d-02] (see"[d] Restricted power supply condition mode/Local shift valueweather dependent" on page 54).Heating/cooling units(1)The unit range consists of one version: a heating/cooling (EKHBX)version.This version is delivered with an integrated backup heater foradditional heating capacity during low outdoor temperatures. Thebackup heater also serves as a backup in case of malfunctioning ofthe outdoor unit.1 Heat pump capacity2 Required heating capacity (site dependent)3 Additional heating capacity provided by the backup heater4 Equilibriumtemperature (can be set through the userinterface, refer to "8.9. Field settings" on page 26)T A Ambient (outdoor) temperatureP H Heating capacityDomestic hot water tank (option)(2)An optional domestic hot water tank can be connected to the indoorunit. The domestic hot water tank is available in 2 types:■ tank with built-in electrical booster heater (EKHW*) in 3 differentsizes: 150, 200 and 300 litre,■ tank without electrical booster heater (EKHTS) in 2 differentsizes: 200 and 260 litre.Refer to the domestic hot water tank installation manual for furtherdetails.Drain pan kit (option)For heating/cooling versions (EKHBX), it is necessary to install theEKHBDP drain pan kit.For more information concerning the drain pan kit, refer to"6.5. Installation of the EKHBDP drain pan kit (only for EKHBXmodels)" on page 14.Solar kit for domestic hot water tank (option)For information concerning the EKSOLHW solar kit, refer to theinstallation manual of that kit.Digital I/O PCB kit (option)An optional EKRP1HB digital I/O PCB can be connected to theindoor unit and allows:■ remote alarm output,■ heating/cooling ON/OFF output,■ bivalent operation (permission signal for the auxiliary boiler) oradditional external backup heater permission signal.Refer to the operation manual of the indoor unit and to the installationmanual of the digital I/O PCB for more information.Refer to the wiring diagram or connection diagram for connecting thisPCB to the unit.Room thermostat kit (option)An optional room thermostat EKRTW, EKRTWA, or EKRTR can beconnected to the indoor unit. Refer to the installation manual of theroom thermostat for more information.Bottom plate heater (option)WARNING■ Never directly touch any accidental leakingrefrigerant. This could result in severe wounds causedby frostbite.■ Do not touch the refrigerant pipes during andimmediately after operation as the refrigerant pipesmay be hot or cold, depending on the condition of therefrigerant flowing through the refrigerant piping,compressor, and other refrigerant cycle parts. Yourhands may suffer burns or frostbite if you touch therefrigerant pipes. To avoid injury, give the pipes time toreturn to normal temperature or, if you must touchthem, be sure to wear proper gloves.CAUTIONDo not rinse the unit. This may cause electric shocks orfire.INFORMATIONAll information and settings in the manual are applicable forall applications, except the chapters with following footnoteindication:"When the unit is configured for restricted powersupply condition mode, see "Appendix" on page 50".NOTICERestricted power supply condition mode can only be usedfor a tank with built-in electrical booster heater (EKHW*).(1) When the unit is configured for restricted power supply condition mode,see "Appendix" on page 50.Indoor unit model Backup heater capacityBackup heaternominal voltageEKHBX008BB3V3S 3 kW 1x 230 V(2) When the unit is configured for restricted power supply condition mode,see "Appendix" on page 50.INFORMATIONUse the EKSOLHW solar kit only in combination with theEKHW* domestic hot water tank.Connection between EKSOLHW and EKHTS domestic hotwater tank is NOT possible.Connectable heatersEKBPHT08 EKBPHT08BAEKHBX008BB3V3S Possible Possible (a)(a) Recommended.T A4312PH