2
Novenco
®
jet fan types AUO/ARO - ARP/AUZ - AUT/ART - AZT
Check the fans and the blade
clearance upon receipt. Inform
the carrier and Novenco
immediately of damages.
Transport
• Jet fans on pallets
Transport and store these on the
transportation pallets.
• Jet fans bolted together with
transportation brackets
Transport and store these as
received, i.e. on the pallets and
bolted together with the
transportation brackets.
Lifting
• Lift in eyebolts fitted in the
suspension brackets
Preferably, fit four eyebolts in a
square configuration in the
suspension brackets on top of the
fan casing.
AZT:
Remove the base plate on top
of the fan casing, if this is mounted,
to access the mounting plate. Use a
strap through the two large holes in
the plate. These are at the fan centre
of gravity.
3. Storage
Correct storage conditions are important
for the function and durability of the
fans.
Damages due to incorrect
storage void the warranty.
4. Installation
4.1 Preparations
Complete the below checklist to ensure a
safe work environment and fan
functionality.
Checklist prior to installation
•
Unpack the fan with care.
•
Check that the rotor rotates freely in
the fan casing with equal blade tip
distances to the casing around the
circumference.
•
Ground the fan before installation
to avoid static electricity. For
example, by assembly on non-
conductive mats.
•
Clear the fan installation location to
ensure free and unimpeded
airflows through the inlet and
outlet. Optimum airflow from all
sides removes risk of stall, gives
best performance and keeps sound
levels down.
•
Secure the installation to at least
IP20, i.e. protect people and
surroundings against solid 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.
• AZT:
Release the fan for installation
by removal of the screws that secure
it to the transport brackets. Save the
screws and reinsert them in the
corresponding holes in the casing
after installation.
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 Installation
Within smoke reservoirs the jet
fans must be fastened to non-
flammable materials only,
which must meet current national
requirements. In general, the jet fans
must be mounted so that there is no risk
of them falling down in case of fire.
The jet fans must be fixed to a
horizontal plane with a natural
frequency at least 20% from the
fan speed.
Installation of fans
1.
Verify the installation location and
check the distances to nearby
obstructions.
•
On the inlet side, the jet fans
require a free field of at least
0.5 m.
•
On the outlet side,
unidirectional jet fans require a
free field of at least 2 m.
•
For reversible fans there must be
a free field of 2 m on either side.
Notice:
Arrows on the fans indicate
the airflow direction and
rotor rotation.
Conditions
Specifications
Comments
Outdoor
One month
• Packaging must be
intact
Indoor or
sheltered
Max. six
months
• For unprotected
fans with no or
broken packaging
• Ventilated location
• No condensation
Prolonged
Max. two years
• Indoor
• Remove packaging
• Ventilated location
• No condensation
• Turn rotor 20 times
every six months
• Add additional
anti-corrosive
coating on motor
shaft
• Change motor ball
bearings after two
years of storage
Vibrations
No
• Location must be
vibration free
Table 4.
Storage recommendations
Temperatures 5 to 40 °C
• Constant
temperature,
preferably 20 °C
• Ventilated
• No condensation
Humidity
Below 50%
• Avoid
condensation
• Exceedance
requires airtight
packaging of
complete fan and
use of a moisture
absorbent agent
such as silica gel
Conditions
Specifications
Comments
Table 4.
Storage recommendations
