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4.4 Vibration dampers
Secure vibration dampers to the support frames by
means of bolts. Mount base plates between the rubber
elements and the foundation.
The vibration dampers help ensure the natural
frequency of the system is below 10 Hz and that the
damping is at least 80%.
Ensure an even load of the vibration dampers by
placement of the fan the distance X from the centre of the
front damper element to fan front flange. See figure 5.
The distance is in the technical fan specifications from the
AirBox program.
The load of the dampers depends on air pressure.
4.5 Flexible connections
4.6 Wire guards
Fans must always be installed so that parts
that rotate cannot be touched or fly off in case
of material failure. It is therefore
recommended to fit wire guards on the inlet
and outlet sides. If ducts are connected, these
can alternatively be provided with wire
guards.
Novenco offers wire guards for in-pipe
installation on outlets. Drill holes in the pipe
and fixate with the bolts and nuts included in
the kit.
4.7 Duct connection
Install the fans with optimal conditions in mind to
ensure smooth and undisturbed airflows. The space
before and after the fans should preferably meet the
optimal requirements in the below figure.
Allow for free areas to facilitate assembly and
disassembly as well as maintenance.
Novenco ZerAx axial fan types AZL-AZN-AZW – Installation and maintenance
Uneven damper loading
strains and reduces damper
functionality.
The natural frequency of the
support must lie at least 20%
from the fan speed.
Figure 5. AZN-AZW on support frame
To prevent spread of vibrations to the surroundings,
it is recommended, in addition to vibration dampers,
also to install flexible connections in the ducts before
and after the fans. These accessories are available as
optional extras from Novenco.
Figure 6. In-pipe installation of wire guard
The fans cannot be used as
structural elements, e.g. for
duct or building support.
X
Eyebolt
20 mm
Nut
9 of 30
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