Cleaning the heat recovery cell

Warning: The safety switch automatically turns off the power when the upper door of the Vallox ventilation unit is opened. Always disconnect the Vallox ventilation unit from the mains before starting maintenance.

Check that the heat recovery cell is clean roughly once a year, or whenever the filters are being replaced. Clean by washing as required.

To check and clean the heat recovery cells:

  1. Disconnect the ventilation unit from the mains electricity supply.
  2. Open the doors of the unit.
  3. Remove the filters (A, B, C). See Replacing the filters.
  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.
    Important: Handle the cells carefully! For example, do not lift the cells by the layers. The cell layers are very thin and easily damaged.
  7. If the cell is dirty, clean it by immersing it in warm water, to which a small amount of a mild detergent has been added.
  8. Rinse the cell clean with a 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 and plug the unit back into the mains. Ensure that the safety switch catch of the door is touching the safety switch.
  11. The heat recovery cells have now been checked and cleaned.