Housing
Damage to unit/functional problems in the event of rubbing impeller.
- Do not fit flange sleeve either twisted or crushed.
- Make sure that the surface is flat.
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- Check rear of housing for the presence of a sealing ring and check that it is properly positioned.
- ECA piano STANDARD, ECA piano TC: If necessary, use auxiliary materials (e.g. foam strip) for fixing in wall or duct. When doing so, maintain a minimum distance of 20 mm to the end of the socket! Do not tape over the attachment of the shutters (arrow).
ECA piano H: Attach foam strip as described above. This is important so that the unit cannot draw in air from the outside.