2 Safety6 Instructions for use VRC 470 0020116689_012.3.6 Frost damage caused by excessively lowroom temperatureIf the room temperature is set too low in individual rooms,sections of the heating installation might be damaged byfrost.▶ If you are absent during a frosty spell, ensure that theheating installation remains in operation and the roomsare warmed adequately.▶ Please note the frost protection function.2.3.7 Moisture and mould damage due toinadequate exchange of airIn heavily insulated rooms that only allow a small exchangeof air, moisture and mould damage may occur.▶ Ventilate the rooms regularly by opening windows andactivate the 1 x ventilation boost function once to saveenergy.If a ventilation unit is connected (applies for controller ver-sion VRC 470/4):▶ Do not disconnect the ventilation unit from the powermains.▶ Clean and service the ventilation unit. The instructions forcleaning and maintenance can be found in the ventilationunit manual.2.4 CE labelThe CE label shows that the products comply withthe basic requirements of the applicable directives as statedon the identification plate.2.5 Intended useState-of-the-artThe controller is a state-of-the-art unit manufactured in ac-cordance with recognised safety regulations.Even so, in the event of inappropriate or non-intended use,damage to the appliance and other property may arise.The controller controls a heating system with a Vaillant boilerwith eBUS interface in a way that is weather-controlled andtime-dependent.The controller can control the hot water generation from aconnected DHW cylinder.If a circulation pump is connected, the controller can alsocontrol the hot water supply and circulation.The controller can control a connected ventilation unit withan eBUS interface on a time-dependent basis.Improper useAny other use that is not specified in these instructions,or use beyond that specified in this document shall beconsidered improper use. Any direct commercial orindustrial use is also deemed to be improper. The manufac-turer/supplier is not liable for any claims or damage resultingfrom improper use. The user alone bears the risk.Any improper use is prohibited.Other applicable documentsIntended use includes the following:– observance of accompanying operating, installation andservicing instructions for the Vaillant product as well asfor other parts and components of the system– compliance with all inspection and maintenance condi-tions listed in the instructions.