C6 Electronic flush valves ยท Installation | 817 Sentronic-R Installation, use and maintenance 10 Cleaning and Maintenance 1. Use a hex wrench to disassemble the panel. 2. Use a screwdriver to adjust the flow rate knob as shown in the following image. ON OFF Cleaning of the filter The sensor valve is equipped with a filter, but should it be dirty, then this may affect the volume of the flush. Should this be the case, then we recommend the cleaning of the filter. 1 . Use the screwdriver to close the flow regulator. 2 . Remove the filter and clean it. 3 . After cleaning the filter, install it again and open the flow regulator. Please keep IR filter clean, use always neutral detergents and a soft cloth. Do not use abrasive cleansers, oils, acids or other liquids that might damage the product. Do not apply air fresheners, disinfection liquids or other liquids on the IR filter. Use only water for domestic use and avoid the use of water with a high degree of acidity, alkalinity or a high degree of impurities that might damage the product.