Set the power using the power selector switch before connecting the wires to the mains connection terminal: • Set RDE 1821415 to 18 kW (down) or 21 kW (up). The set power must be marked on the ratings plate. • Now screw the wires tightly into the mains connection terminal. Robert Bosch Hausgerate GmbH 9 000 813 417 | (17.9.12) 10 | English Startup/additional information (Figure VI) The device is compliant to IEC 61000-3-12. First start-up • Switch on the fuses. • Setting the temperature. • Starts rinsing: Open the warm water tap and allow water to flow for at least 1 minute (flow-rate at least 6 litres per minute). Only then (for safety reasons) will the appliance begin to heat. Tip: Should the appliance not start because of a reduced flow-rate, remove the perlator, shower head or similar before start and repeat the process. • Remove the flow-rate limiter (Figure A) with low water pressure. • Explain the operation of the continuous-flow heater to the user. • If the continuous-flow heater does not have sufficient water flow due to low water line pressure in your domestic plumbing system, remove the flow-rate limiter (Figure A). Technical data RDE 1821415 Rated output Rated voltage Fuse protection Minimum conductor cross-section Warm water flow at rated output with temperature increase from 12 °C to 38 °C 12 °C to 60 °C Start-up flow Start-up flow pressure * Application area in water specific electric resistance at 15 °C Rated pressure Maximum permissible supply temperature Maximum mains impedance at connection point *The pressure loss on the mixer must also be added Priority circuit for the combination with electrical storage heaters (Figure B): For operation with a priority circuit, a special load shedding relay BZ 45L20 (special accessory) is required. Other existing load shedding relays, with the exception of electronic load shedding relays, may malfunction. The control electronics must be coded when operated with a load shedding relay (Figure C). Status display on the appliance (Figure D) LED Appliance status Off Off Ready Appliance is heating Desired water temperature is not reached (water flow too high for appliance rating). Lights up Slow flash (1/s) Fast flash (4/s) 18 21 9.9 11.6 5.4 6.3 0.025 (0.25) . 1 300 1.0 (10.0) . 0.244 kW V A mm2 l/min l/min l/min MPa (bar) .cm MPa (bar) °C . 9 000 813 417 | (17.9.12) Robert Bosch Hausgerate GmbH English | 11 Operation with prewarmed water (solar heated) The continuous-flow heater can only heat prewarmed water to a max. of 60 °C. If the cold water supply exceeds a temperature of 55 °C, the water will not be warmed any further. G 1 2 A 472 99 115 236 20 100 33242 388 Important: The cold water supply temperature must not be higher than 55 °C! If the cold water supply exceeds a temperature of 60 °C, a circuit breaker will trigger and shut the appliance off. Therefore, the residential plumbing must be equipped with a thermostatic premixer (e. g. special accessory BZ 45T20) that will limit the cold water supply temperature to a max. of 55 °C by appropriately mixing in cold water. Special accessories • Pipe kit BZ 45U20: for use of the continuous-flow heater as an under sink appliance • Priority switch (load shedding relay) BZ 45L20: for operation with a priority circuit • Mounting kit BZ 45K23: for surface mount installation • Thermostatic premixer BZ 45T20: for installation in the domestic plumbing when using preheated water Robert Bosch Hausgerate GmbH 9 000 813 417 | (17.9.12) 12 | English Operating instructions Please read the operating i...

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