Cleaning the fans
Check the cleanliness of the fans when servicing the filters and the heat recovery cell. Clean the fans as required.
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.Handle the fan blades carefully.
It is recommended that the fans be cleaned by a professional.
To clean the fans:
- Disconnect the ventilation unit from the mains electricity supply.
- Undo the door screws to open the door of the Vallox ventilation unit.
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Lift the door off.
CAUTION:The door is heavy.
- If cables, whose length prevents the fan chamber from being moved far enough from the ventilation unit, have been connected to the connection card on the electric box (F) through the ceiling bushing (G), disconnect the cables. Then, pull out the cables through the bushing.
- Detach the outdoor and exhaust air temperature sensors from the ceiling brackets. Pull off the round feedthrough rubbers (H) from the partition wall slots.
- Loosen the earthing screw in the top left corner of the electric box (K).
- Release the damper actuator (J) by placing the orange magnet (I) on the magnet symbol on the damper actuator. Memorise the magnet placement so that you can replace it correctly after maintenance. Detach the bar from the damper pivot. Turn the damper actuator handle to detach the bar from the bypass damper and turn the damper to the cell bypass position.
- Pull out the black upper support of the cell (E). Lift and pull out the cell (D).
- Pull out the fan chamber (M) (including fans, electric box and bypass duct with its damper actuators).
- The fans are secured to the fan chamber with three screws (L). You do not need to remove the earthing screw at the bottom of the rear wall.
- Disconnect the quick connectors of the fan cable.
- Clean the fans. You can clean the fan with compressed air (use eye protection) or by brushing them with a clean paint brush.
- To reassemble the ventilation unit, follow the above steps in reverse order.Important:
Remember to reattach the damper actuator bar to the damper pivot and secure it with the orange magnet. Make sure the sensors and their feedthrough rubbers are in place. Check also that the connections have been made correctly and the earthing screw is in place in the left corner.
The anemometer in the fans must be cleaned at least every three (3) years. It is recommended to use compressed air for the cleaning. It is best not to remove the fan’s anemometer, but you can clean it with compressed air.
