4
Novenco
®
jet fan types AUO/ARO - ARP/AUZ - AUT/ART - AZT
Electric connection
1.
Check if current legislation
prescribes installation of f.x. an
emergency stop and include this in
the installation.
2. AUO/ARO:
Remove the cover plate
on the fan casing to access the
connection panel.
1. Remove screw in handle
2. Remove handle
3. Unscrew screws in cover
4. Remove cover
The switch can be used as safety
isolator.
ARP/AUZ-AUT/ART-AZT:
Remove
the lid on the external terminal box.
3.
Connect the motor through a thermal
relay based on the motor nominal
current. Refer to the following
information.
Connection references
•
Motor name plate
•
Order specification
•
Appendix
on page 10
•
Appendix
on
AUO/ARO:
Make the connections
directly in the built-in switch.
ARP/AUZ-AUT/ART-AZT:
Make
the connections directly in the
external terminal box.
4. AUO/ARO:
Remount the cover plate
from step 2 on the fan casing.
ARP/AUZ-AUT/ART-AZT:
Remount the lid from step 2 on the
terminal box.
4.4 Approval for operation
The installation must be approved with
regard to operation and interaction. The
person responsible for the operation of
the system must initiate this approval
test. The test must be confirmed.
The person responsible for the operation
of the system must keep the approval
test documents. For jet fans approved for
smoke control, the documents must be
presented upon request from the
authorities.
5. Start of operation
Perform the below steps every time the
fans have been stopped.
5.1 Before startup
Check the fans and installation location
in accordance to the below checklist and
correct and improve as necessary.
Checklist
• Safe operation
Make sure that any wire guards on
the suction side as well as guide
vanes on the pressure sides are
correctly mounted.
• Clean fans
The fans must be clean and free
from tools and objects that can
affect the airflow.
• Electrical connections
The electrical connections must be
correct and in accordance to the
prescribed requirements.
Switch the fan power briefly On,
then Off, to check the rotational
direction of the rotor. Refer to the
arrow plates on the fan casings.
5.2 Startup procedure
Startup procedure
1.
Start the fan.
2.
Check that no abnormal noises are
present.
3.
Check that the vibration levels are
acceptable.
See section “6.3 Vibration levels”.
4.
Check that the fan operates normally
after 30 minutes of operation.
In the very first 30 minutes of operation,
the motors may use more power than
stated on the motor plate. This is the
running-in period. The amperage
depends among other things on the
temperature.
The fans are designed for
continuous operation. The
below kinds of operation may
cause fatigue breaks in the rotors and
endanger people.
•
Operation in stall area, i.e. with
counter pressure that pulsates -
called pump mode
•
Operation with uninterrupted
and repeated starts and stops
•
Uneven flow velocity through
the fans
Ask Novenco if in doubt.
6. Maintenance
Keep the fans in good and operational
condition to ensure functionality, fan life
and warranty.
6.1 Before maintenance
Disconnect the fans from the
electrical system, before
initiation of any kinds of service
on the fans. Make sure the fans cannot
start accidentally. Fans controlled by
automation may start suddenly, unless
they are disconnected.
Fan units with external safety switches
must be disconnected at the switches
and secured, e.g. with locks. This is
done in the fuse box or other centrally
placed switch.
AUO/ARO: Setup of lock switch on fan
1.
Turn off the fan.
Depending on the system layout,
turn off the power centrally or with
the handle on the fan casing.
2.
Remove the cover plate on the fan
casing.
3.
Insert a padlock underneath the
handle to prevent the handle from
being turned.
A plastic stick may obstruct the
insertion of the lock. Dismount the
handle and cut the stick off with a
cutter. Remount the handle.
Figure 7.
Removal of cover on AUO/ARO
1
2
3
4
Figure 8.
Switch locked in Off position
