ZerAx
®
axial flow fan types AZL-AZN-AZW
3
4.3 Support frames
These are optional extras and are
recommended for installation.
Support frames must be
grounded to prevent electrical
shocks.
The AZL, AZN and AZW fans can all be
installed on horizontal support frames.
The AZN and AZW can also be fitted
with frames for vertical mounting. Refer
to the order and technical specifications.
For the AZL, two types of horizontal
support frames are available. The first
type, in figure 2, is for installation on flat
surfaces and consists of a frame (item 01)
on rails with optional dampers (item 02).
The second type, in figure 3, is also for
installation on flat surfaces and can
either be put directly on the surfaces or
put on rails transversally to the airflow.
Dampers (item 02) are optional.
For the AZN-AZW the horizontal
support consists of two plates (item 01)
with two stiffeners (item 03) between
them. Screw size is M10x20. Dampers are
optional (item 02). See figure 4.
For the AZN-AZW the vertical support
consists of a plate (item 01) onto which
the fan is mounted in the flange.
Dampers (item 02) are optional. See
figure 5.
To prevent spread of vibrations to the
surroundings, it is recommended to
insert anti-vibration mounts between the
fan and support. Flexible connections in
the ducts before and after the fan are also
recommended. The accessories are
available as optional extras from
Novenco .
Secure anti-vibration mounts (figure 4)
in the support frame by means of bolts.
Mount base plates for attachment to the
foundation at the bottom of the rubber
elements.
The natural frequency of the
support must lie at least 20%
from the fan speed.
The anti-vibration mounts help to ensure
the natural frequency of the system is
below 10 Hz and that the damping is at
least 80%.
To load the vibration dampers evenly,
the front flange of the fan must be the
distance X from the centre of the front
damper. See figure 6. The distance is
found in the AirBox fan calculation.
Loading of dampers vary depending on
air pressure.
Uneven loading can strain and reduce
damper functionality.
4.4 Wire guard installation
Fans must always be installed so that
parts that rotate cannot be touched. The
fans can be optionally fitted with 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.
4.5 Connection to duct
The fans cannot be used as
structural elements, e.g. for duct
or building support.
Install the fans with optimum conditions
in mind to ensure smooth and
undisturbed airflows. The space before
and after the fans should preferably meet
the requirements in figure 8. See figure 9
for reduced conditions.
Allow for free areas to facilitate assembly
Figure 2.
Horizontal support frame for AZL
Figure 3.
Horizontal support frame for AZL
– compact type
01
02
01
02
Figure 4.
Horizontal support frame for
AZN-AZW
Figure 5.
Fans for vertical mounting with
support frame and anti-vibration
dampers (left) and with support
frame
03
02
01
01
02
Figure 6.
AZN-AZW on support frame
Figure 7.
In-pipe installation of wire guard
X
20
Eyebolt
Nut
