Cleaning the supply air fan

To clean the supply air fan:

  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. Remove the extract air filter (4e) and heat recovery cell (2a) from the unit. Unscrew the mounting screw (J) of the post-heating resistor. Lift and rotate the duct (K) of the post-heating resistor.
  5. Unscrew the fan’s two mounting screws TX10 (L). They are located in the front edge of the mounting plate (R model).
  6. On the rear door side (R model), the fan is attached to a mount (H). Move the fan towards the front (R model) until the fan detaches. Disconnect the fan cable.
  7. Unscrew the four mounting screws (M) to remove the fan’s air controller (I). You can clean the fan blades with compressed air (wear protective goggles) or by brushing them gently. Do not remove or move the fan blade balancing weights. It is best not to remove the fan’s anemometer (N) but you can clean it with compressed air.
  8. To reassemble the ventilation unit, follow the above steps in reverse order.
  9. Close the ventilation unit’s door.
  10. Plug the ventilation unit back into the mains.
The supply air fan has now been checked and cleaned.