Cleaning the heat recovery cell

Warning:
Always disconnect the power plug before starting maintenance on the ventilation unit. The unit has no safety switch that would switch the power off when the door of the unit is opened.

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 cell:

  1. Disconnect the ventilation unit from the mains electricity supply.
  2. Remove the cover hatch of the supply air filter and unscrew the four screws on the door to open the door of the Vallox ventilation unit.
  3. Lift the door off.
    CAUTION:
    The door is heavy.
  4. Grab the sides of the cell (2a) and pull the cell from the unit.


    Important:
    Handle the cell carefully! For example, do not lift the cell by the layers. The cell layers are very thin and easily damaged.
  5. 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.
  6. Rinse the cell clean with a water spray. Do not use a high-pressure cleaner.
  7. When all the water has drained from between the layers, push the cell back in place.
  8. Close the door of the unit.
  9. Plug the ventilation unit back into the mains.
The heat recovery cell has now been checked and cleaned.