Vaillant VU GB 806/5-5 Operating Instructions Manual

Also see for VU GB 1006/5-5: Installation manual

Operation14 Operating instructions ecoTEC plus 0020134822_0144.8 Hot water generationa Danger!Risk of being scalded by hot water!There is a danger of scalding at the hotwater draw-off points when the tempera-tures are in excess of 60 °C. Young childrenand elderly persons are particularly at risk,even at lower temperatures.> Select the temperature so that nobody isat risk.a Danger!Possible risk of death caused bylegionella formation!In domestic hot water cylinders there is arisk of legionella forming, which can causeillness.> If the unit is used for post-heating withina solar-supported drinking water heatinginstallation, set the domestic hot wateroutlet temperature to at least 60 °C.b Caution.Material damage due to calcification.If the water hardness is more than3.57 mol/m3 (=357 mg/l), there is a risk ofcalcification.> Set the maximum water temperature to50 °C.To generate hot water in conjunction with the VU unit type,a VIH-type domestic hot water cylinder must be connectedto the boiler.45DHW temperatureBack4.11 Setting the hot water temperature> Press the on/off switch to switch on the boiler.> Press the left-hand selector button (" ").The hot water temperature that is set is shown flashing onthe display.> Use the minus button or the plus buttonto change the hot water temperature.> Confirm the change by pressing the right-hand selectorbutton ("OK").If your controller is connected to the boiler via a dual-cableeBUS line, you can set the target hot water target tempera-ture on the controller. Ask your competent person whetheror not your controller is connected via a dual-cable eBUSline.If your controller is connected via a dual-cable eBUS line:> Set the hot water temperature on the boiler to the maxi-mum possible temperature.> Set the desired hot water temperature4.9 Setting a room thermostat or weathercompensator214.12 Setting the room thermostat/weathercompensator> Set the room thermostat, weather compensator (1) andthermostatic radiator valves (2) as specified in the oper-ating manuals for these accessories.4.10 Switching off the functions of the boiler4.10.1 Switching off hot water generation(VU boiler)If a domestic hot water cylinder is connected, you canswitch off the cylinder charging without switching off Heat-ing mode.