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1
Dowel for drill holes
1
1
Connection duct:
3
steel folded spiral-
seams duct.
(For ceiling barrier
system or ventila-
tion ducts without
fire protection: flex-
ible aluminium
duct)
Preparing the shaft
1. Produce opening in shaft or alternatively pro-
duce a wall facing. Ensure a suitable, flat sur-
face for the housing so that the fan insert can
be safely inserted in the housing later on.
2. Correctly attach main duct inside the shaft.
1
Main duct (steel fol-
2
ded spiral-seams
duct)
1
Power cable
4
3. For fire protection systems, use ceiling com-
pound. To do this, encase the ceiling and pour
in the material from above.
4. Connect connection duct, suitable for the
housing, to the main duct and seal for ventila-
tion.
5. Cut connection duct to length, note a max-
imum duct length of 2 m.
Cut connection duct to a length which al-
lows it to be fitted on the exhaust socket
and also sealed for ventilation at the unit
end.
6. Lay suction duct and seal gap remaining cor-
rectly as described in previous mounting in-
structions.
7. Lay power cable in shaft and allow to protrude
by around 30 cm above the shaft opening.
8. Lay power cable: Electrically connecting the
unit [} 19].
8 Mounting preparations
15
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