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Resumen del manual
Maximum output is obtained when the slide control is to the far left. In order to optimise energy consumption, adjust slide control position to supply the minimum output required. If there is air in the gas pipe when the appliance is commissioned, this can cause ignition failure. In such cases, the hot water tap should be turned off and then on again so that the appliance repeats the ignition cycle. The procedure should be repeated as necessary until the gas pipe is purged of air. Danger: the area in front of the burner can reach very high temperatures, and there is a risk of burning on contact. 3.2 Water temperature control The water temperature control is used to adjust the water flow rate, and thereby the water temperature, to the desired setting. Turning the control clockwise reduces the water flow rate and increases the temperature; turning the control anti- clockwise increases the water flow rate and reduces the temperature. If the temperature is set only as high as required, energy consumption is reduced and the likelihood of scale deposits in the heat exchanger minimised. 3.3 Appliance adjustments All instantaneous water heaters are factory-adjusted and require no further adjustment.* Water heaters that use LPG (liquefied petroleum gas, i.e. butane/propane) are set to the operating pressure stated on the identification plate (28 mbar). Natural gas appliances are set to a Wobbe Index of 15 kWh/ m3 and a supply pressure of 20 mbar. * Sealed components must not be tampered with. 3.4 Maintenance The appliance should only be serviced by an approved engineer. A complete overhaul should be carried out after two years. The overhaul should involve thoroughly cleaning the heat exchanger, burner, pilot burner and automatic water valve filter. If necessary, the inside of the heat exchanger and the connecting pipes should be descaled. Check the gas and water valves for leaks and carry out a complete function check. If components need to be replaced, use only genuine Bosch spare parts. 3.5 Flue gas safety device The recommition must be done from a qualified technician only. The flue gas safety device must not under any circumstances be switched off, simulated or replaced by any other component. Operation and safety precautions The flue gas safety device checks the effectiveness of flue gas extraction by the flue. If it is inadequate, the appliance switches off automatically so that the combustion fumes do not escape into the room in which the appliance has been installed. The flue gas safety device resets after a cooling- down period. If the appliance shuts down while in operation, ventilate the room. Wait about 10 minutes then restart the appliance. If the problem recurs, call an engineer. The user must never make any modifications to the appliance. Maintenance* If faults occur on the flue gas safety device, proceed as follows: -Undo flue gas safety device fixing screw. -Unplug igniter unit connector Replace damaged component with new one and refit using the reverse of the procedure set out in the table above. Function check* Flue gas safety device function check: -Disconnect flue pipe -Replace with pipe (about 50 cm long) with sealed end -Fit pipe vertically -Start up appliance at rated output and set temperature control to maximum temperature. Under those conditions, the appliance should shut down after two minutes. Remove temporary pipe and reconnect flue pipe. * This work may only be carried out by an approved engineer. 3.6 Converting to a different gas type Use only the genuine Bosch conversion kit. Conversion may only be carried out by an approved technician. 6 720 607 527 3.7 Troubleshooting Installation, servicing and repairs may only be carried out by an approved engineer. The following table illustrates only a few solutions to straightforward problems. Fault Possible Cause Solution Appliance does not ignite. Pilot flame lights slowly/with difficulty Red LED flashes Batteries flat, incorrectly fitted or switch set to Off Batteries flat. Check position and refit/replace. Replace. Water not hot enough Check position of water temperature control and adjust to obtain desired hot water temperature Water not hot enough, no flame Gas supply dynamic pressure too low Check gas cylinder governor and replace if incompatible or damaged Check whether gas cylinder (butane) is freezing when appliance is in operation and re-site in warmer location if necessary Flame goes out while appliance operation is in Temperature limiter has tripped Flue gas safety device has tripped Wait 10 minutes then restart appliance. If problem recurs, call an approved technician. Ventilate room. Wait 10 minutes then restart appliance. If problem recurs, call an approved technician. Reduced water flow rate Inadequate inlet flow rate Dirt in water service cock or mixer unit Automatic water valve clogged Heat exchanger clogged (scale) Check and adjust. Check and clean. Clean filter.* Clean and descale as necessary.* The operations marked with ...
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