51© Vallox Oy - All rights reservedMAINTENANCETo replace the filters:1. Disconnect the ventilation unit from the mains electricitysupply.2. Open the upper door of the unit.3. Remove the old filters (A, B, C) and discard them.4. Install the new filters (A, B, C).5. Close the door of the unit. Ensure that the safety switchcatch of the door is touching the safety switch, allowingthe unit to be turned on.6. Plug the ventilation unit back into the mains.The filters have now been successfully replaced.CLEANING THE HEAT RECOVERYCELLS (USER)Check that the heat recovery cells are clean roughly once ayear when the filters are being changed. Clean by washingas required.IMPORTANTIf the unit has an enthalpy cell, it must not be washed. Onlyaluminium or plastic cells can be washed.To check and clean the heat recovery cell:1. Disconnect the ventilation unit from the mains electricitysupply.2. Open the doors of the unit.3. Remove the filters (A, B, C).4. Remove the support grid of the filters.5. Disengage the upper support strip (D) of the cell.6. Lift and pull the cell (E) out of the unit.7. If the cells are dirty, clean them by immersing it in warmwater, to which a small amount of a mild detergent hasbeen added.8. Rinse the cell clean with water spray. Do not use a high-pressure cleaner.9. When all the water has drained from between the layers,reassemble the ventilation unit in the reverse order.10. Close the doors. Ensure that the safety switch catch ofthe door is touching the safety switch.11. Plug the ventilation unit back into the mains.The heat recovery cells have now been checked andcleaned.IMPORTANTHandle the cells carefully! Forexample, do not lift the cells bythe layers. The cell layers arevery thin and easily damaged.DEABC