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Removing and cleaning the extract air fan

Check the cleanliness of the fans when servicing the filters and the heat recovery cell. Clean the fans as required. 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.

Important

The fans are extremely sensitive to external shocks. It is recommended that the fans be cleaned in place, i.e. without attempting to remove them. Remove the fan beds and the bypass duct carefully in accordance with the below instructions to prevent damage to the unit. The small size of the unit restricts the space available for servicing.

To remove and clean the extract air fan:

  1. Disconnect the ventilation unit from the mains electricity supply.

  2. Lift the latch to open the door of the ventilation unit.

  3. Lift the door off.

  4. Remove the extract air filter (C), the cell top bracket (E) and the heat recovery cell (D). See the section called “Replacing the filters (User)” and the section called “Cleaning the heat recovery cell (User)”.

  5. Remove the mounting screws of the fan bed (see the section called “Removing and cleaning the supply air fan”, Figure 1).

  6. Remove the connector package from the frame of the unit.

  7. Separate the connectors from each other.

  8. Tilt the fan to the left and turn 90°.

  9. Tilt the fan forward to pull it out of the unit.

  10. The fan has now been removed for cleaning.

  11. To reassemble the ventilation unit, follow the above steps in reverse order.

  12. Close the door of the unit. Ensure that the safety switch catch of the door is touching the safety switch, allowing the unit to be turned on.

  13. Plug the ventilation unit back into the mains.

  14. The fan has now been checked and cleaned.

Note

Install the fan beds in a reverse order.

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