Cleaning heat exchanger and unit inside

  1. Switch off ventilation unit with the mains fuse, secure against being accidentally switched back on and position a visible warning sign.
  2. Remove the front cover → Installation of WS 160 Flat or Installation of WS 300 Flat. Note information on sticker.

  3. The sealing strip will be damaged if the heat exchanger is pulled out or inserted at an angle.

    Do not twist heat exchanger. Do not move the ventilation unit.

  4. Rotate holders of heat exchanger to one side and carefully and evenly pull heat exchanger out of ventilation unit.
  5. Thoroughly flush heat exchanger with water or soapy water, drip off and let it dry well.
  6. Wipe down the interior walls of the ventilation unit with a cleaning cloth.
  7. Carefully slide heat exchanger into housing until stop is reached (→ position sticker) and secure with holders.
  8. Attaching front cover.
  9. Switch on the ventilation unit.