BOSCH RDH18400 (01) PDF Document

The BOSCH RDH18400 is intended for domestic use and the household environment only. Please observe the following safety instructions:

• Install and operate the appliance as described in the text and illustrations.

• This appliance is intended for use up to an altitude of 2000 m above sea level.

• The appliance may only be installed and stored in a frost-free room (due to residual water).

• The continuous-flow heater may only be connected and put into operation by a qualified professional.

• In order to avoid potential sources of danger, repairs and maintenance may only be undertaken by a suitably qualified specialist.

• Never open the appliance without disconnecting the power supply beforehand.

• The statutory regulations of the respective country, as well as those of the local electricity and water suppliers, must be adhered to.

• The continuous-flow heater is a Class I appliance and must be connected to the protective earth.

• The appliance must be permanently connected to electrical connections. The conductor cross-section must comply with the installed appliance power.

• To guarantee compliance to relevant safety regulations, an all-pole separator must be fitted during installation. The contact opening must be at least 3 mm.

• Ensure that the inlet water pressure, maximum and minimum, is according with the value specified by the manufacturer.

• The water inlet of this appliance shall not be connected to inlet water obtained from any water heating system.

• Only connect the continuous-flow heater to a cold water line.

• Disconnect the electrical connection cable from the supply and shut off the water supply before connecting the appliance.

• Connect the water supply and then connect the electrical supply.

• The appliance may only be used for heating drinking water for household use.

• The mixer and the warm water pipe may be hot. Please inform and instruct children appropriately.

• Do not use aggressive or abrasive cleaning detergents.

• Do not use a steam cleaner.

In the event of a fault or leak with your BOSCH RDH18400, follow these steps immediately:

• If a fault occurs, switch off the mains voltage supply immediately to avoid the risk of electric shock.

• If the appliance should leak, immediately shut off the cold water supply to it.

The BOSCH RDH18400 continuous-flow heater heats water as it flows through the appliance and only consumes power during this period. It has two heat settings:

• eco: Economy setting – two thirds power. This setting is ideal for a wash basin, shower, or bidet.

• comfort: Intensive setting – full power. This setting is used in combination with a thermostatically-controlled premixer, for high temperatures or for large volumes of water, such as for dishwashing, cleaning, or a bath tub.

To operate the BOSCH RDH18400:

1. Turn on the hot-water tap. The continuous-flow heater switches on automatically and heats the water.

2. It switches off again when the tap is turned off.

Please note: When the water tap is turned on only slightly, the continuous-flow heater will operate at half power in both of the preselected settings (eco or comfort). When the water tap is turned on fully, the appliance will operate at full, preselected power.

• Increasing the water temperature: Slightly close the hot-water tap.

• Decreasing the water temperature: Turn on the cold-water tap.

To start up the BOSCH RDH18400 after a water cutoff:

1. Disconnect the appliance from the mains supply (remove the fuses in the fusebox).

2. Turn on the hot-water tap until the air is purged from the pipe.

3. Reinstall the fuses.

The appliance is now ready for operation.

Use the “eco” setting whenever possible. For wash basins, you can open the corner valve to such an extent that only the lower heat setting switches on.

It is possible in winter that the supply temperature of the water is reduced and the required outlet temperature is no longer achieved. To compensate for this temperature reduction, please reduce the water quantity on the tap until the required water temperature is achieved.

Simply wipe the appliance with a damp cloth. Do not use acidic or abrasive cleaning materials. It is normally not necessary to descale the appliance. However, extremely hard water and the frequent flows of very hot water can cause the appliance to scale up. In this case, please contact after-sales service.

* Plus any pressure loss at the tap mixer

** Larger cable cross-sections may be required depending on the connection configuration

If your BOSCH RDH18400 does not operate as required, it is often due to a very minor problem. Please check the following guidelines. Improper repairs can lead to risk of serious injury.

If the fault could not be eliminated, please call customer service.