WRO 300 HHCEN12104 Rev 09.2010 Regular maintenance 373.5 Flush3.5.1 Manual FlushThis mode provides a short flush of the WRO at elevated flowrate (5 minutes preset).Procedure1 Press until SELECT appears2 Scroll with to select MANUAL FLUSH.3 Press to initiate Manual Flush (MANUAL FLUSH willbe displayed and will be lit).3.5.2 Auto flushDuring Standby Auto flush is regularly performed to exchangewater in the WRO, if enabled in preset. Within specified inter-vals the water circulates in the WRO and some water goes todrain.3.6 Exterior cleaningWipe the outside of the WRO 300 H with a cloth moistenedwith ethanol (70 %) or isopropanol (60 %).NOTEDo not use iodine-based or tenside-containing disinfectants as thesemay crack or discolour the plastic materials.