Maico ER GH AP Notice De Montage Et Mode D'emploi page 32

8 Mounting preparations
29 Retaining bolt
Keep a maximum distance of 1.5 m between
the duct fastenings. It is essential to observe
the installation instructions: Mounting prepara-
tions [} 29].
Duct attachment with duct clamp,
alternatively duct attachment with clamping
band
Danger due to fire transmission
DANGER Danger to life due to fire trans-
mission if an incorrect connection duct is
used on the APB housing when installed in
the ceiling.
Always use steel folded spiral-seams ducts for
the connection.
DANGER Danger to life due to fire trans-
mission in case of faulty ceiling compound.
It is essential that the remaining gap between the
main duct and the wall or ceiling is completely
sealed with non-flammable materials that are res-
istant to deformation. For example, use concrete
or cement mortar.
32
30 Steel clamping
band
DANGER Danger to life due to fire trans-
mission if not flush with the brickwork or with
panel building materials.
If used outside the shaft, seal the gap remaining
between the connection duct and brickwork/wall
boards with non-flammable materials resistant to
deformation.
For example, use concrete or cement mortar for
brickwork or special fire protection filler for wall
boards.
Procedure
It is essential to observe the installation in-
structions: Mounting preparations [} 29].
1. Correctly attach main duct inside the shaft.
2. Apply ceiling compound. To do this, encase
the ceiling and pour in the material from
above.
3. Make shaft opening for the DN 80 steel folded
spiral-seams duct.
4. Fit duct attachments to the ceiling. Only use
permitted, suitable mounting material.
5. Connect DN 80 steel folded spiral-seams duct
to main duct and seal for ventilation, for ex-
ample with cold-shrink tape.
6. Apply brickwork compound. Seal gap between
brickwork and folded spiral-seams duct. The
gap remaining must be fully sealed with non-
flammable materials that are resistant to de-
formation. For example, use concrete or ce-
ment mortar or for wall boards, use fire protec-
tion filler.
7. Fasten duct bends with 3 steel screws or 3
steel blind rivets.
8. Make the DN 80 opening for the unit connec-
tion socket in the suspended ceiling (fire res-
istance is not required). It is essential to ob-
serve the permissible installation positions:
Permissible installation positions for fans
[} 30].
9. Attach the suspended ceiling and provide a
suitable, level substructure.