47© Vallox Oy - All rights reserved47© Vallox Oy - All rights reservedCLEANING THE FANS (INSTALLER)Check the cleanliness of the fans when servicing the filters and theheat recovery cell. Clean the fans as required.You can clean the fan blades with compressed air (wear protectivegoggles) or by brushing them gently. Do not remove or move the fanblade balancing weights.Cleaning the supply air fanTo clean the supply air fan:1. Disconnect the ventilation unit from the mains electricity supply.2. Lift the latch to open the door of the Vallox ventilation unit.3. Lift the door off.CAUTIONThe door is heavy.4. Remove the extract air filter (C), the cell top bracket (E) and theheat recovery cell (D). See chapters “Replacing the filters” and“Cleaning the heat recovery cell”.5. Pull out the temperature sensor (figure 1) located at the top of theextract air duct (G). Remove the stopper screw (I) at the bottomof the duct. The extract air duct now comes out by turning andpushing it downwards simultaneously (figure 2).6. Remove the temperature sensor from the resistance support (figure 4).7. Remove the additional and post-heating radiator support, whichis attached by two wing nuts (Vallox 110 MV and Vallox 145 MV) orscrews (Vallox 096 MV) from below (figure 5).1 1 det 324 5 6 7MAINTENANCEIMPORTANTThe fans are extremelysensitive to external shocks. Itis recommended that the fansbe cleaned in place, i.e. withoutattempting to remove them.Handle the fan blades carefully.Do not remove or move the fanblade balancing weights.