Novenco ZerAx axial fan types AZL-AZN-AZW
– Installation and maintenance
7 of 30
objects up to 12 mm.
Also, install wire guards on fans where there is direct access to the rotor. Wire guards from
Novenco can be installed as close as 120 mm before and after the rotor.
See section
for minimum distances for undisturbed airflow.
The vibration level of the installation depends on how the fans are installed, the
operational conditions and the natural frequency of the foundation and supports.
Follow the below guidelines to avoid resonance.
•
Soft suspension:
Fan is fixated through springs or dampers. The natural frequency
[Hz] of the system should be at least 20% below fan speed.
Soft suspensions are available from Novenco.
•
Stiff suspension:
Fan is fastened to a duct or a hard surface. The natural frequency
of this system should be at least 20% above fan speed.
•
Elastic structure:
Fan is fastened to an elastic structure. The natural system
frequency should be at least 20% higher or lower than fan speed.
The owner is responsible for compliance with the above requirements. Non-compliance
affects the product warranty.
4.2 Set up fans
Prepare fans for installation
1.
Fit the support options needed for mounting the fan. This may include the following.
•
Special carriers
•
Support frame (recommended)
•
Mounting plate
•
Vibration dampers (recommended)
Proper support ensures safety and installation stability. See sections
The fan support must be strong enough to support the fan weight and any fitted accessories.
on page 25 and the
Total weight of installation
in the technical fan specifications from AirBox.
2. Optional:
Install flexible connections on the fan flanges.
on page 9.
3. Optional:
Install wire guards on one or both sides of the fan casing.
on page 9.
Connect fans
1.
Check that the fan motor drain holes point
downward and are in the lowest possible location.
Adjust the fan position, if necessary.
2.
Unplug the fan motor drain holes.
3.
Place and orient the fan in accordance with the
airflow. Refer to the arrows on the fan casing.
•
Duct fans:
These can be installed horizontally
or vertically as part of duct works or connected
to duct openings as supply or exhaust fans.
The installation space must at least meet the
reduced requirements and preferably those for
optimum installation space. See section
on page 9.
The motor drain holes must
point downwards at the lowest
point as the installation
environment and operation
conditions may cause condensation
in the fan motors. Fan motors
mounted at angles typically have the
drain holes in the back covers.
Contact Novenco if the drain holes
are missing.
