NOVENCO ARO 290, Руководство по установке и обслуживанию

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Novenco
®
jet fan types AUO/ARO - ARP/AUZ - AUT/ART - AZT 5
presented upon request from the
authorities.
5. Start of operation
Perform the below steps every time the
fans have been stopped.
5.1 Before start-up
Check the fans and installation location
in accordance to the below checklist.
Correct and improve as necessary.
Before start-up
• 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 verify the rotational
direction of the rotor. Refer to the
arrow plates on the fan casings.
5.2 Start-up procedure
Start-up procedure
1. Start the fan.
2. Check that no abnormal sounds and
vibrations are present.
3. Check that the vibration levels are
acceptable.
See section “6.4 Vibrations”.
4. Check that the fan operates without
abnormal sounds and vibrations
after 30 minutes of operation.
In the very first 30 minutes of operation,
the motor 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 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.
Switch off power supply for fans
1. Locate the central fan power supply.
2. Turn off the power for the fans.
3. Disconnect the power supply.
4. Lock the power switches.
Alternatively, lock access to the
power switches.
Service of the fans can now begin.
6.2 Intervals
Safe and proper function of the fans
require maintenance at regular intervals.
Faulty maintenance of fans covered by
warranty voids the warranty.
Maintenance of the fans must include the
following.
Maintenance checklist
• Inspection of each complete unit
• Repair and service of units
• Test of functionality
It is recommended to implement
procedures in accordance with the above
requirements.
6.3 Cleaning
Clean fans and silencers when needed by
means of pressurised air or vacuum
cleaning.
Do not use high-pressure water
for cleaning the fans or
silencers.
6.4 Vibrations
In the production, all fans are balanced to
run without vibrations.
Vibrations that occur, when the fans are
in operation, usually indicate
accumulations of dust and dirt or foreign
bodies on the rotor system. If ordinary
cleaning cannot remove the vibrations,
the fans must stay off-line and expert
assistance be called in. Prolonged
operation with vibrations present is
likely to damage motor bearings and
rotors.
Measure fan vibration velocities in
accordance with ISO 14695 and with
instruments that can measure Root Mean
Square (RMS) vibration velocities. Refer
also to ISO 13350:2015.
6.5 Motor
The fan motor is a key component, that
require regular service to ensure safety,
performance and warranty.
Service the fan motor in
accordance to the motor
manufacturer’s maintenance
instructions.
The motor bearings are greased-for-life
and must be replaced according to the
motor manufacturer’s instructions.
6.6 Motor removal
Before beginning work on the motor,
follow the procedure in section “6.1
Before maintenance”.
References to specific items below are to
figure 8 on page 11, unless noted
otherwise.
Dismounting motor
1. Disconnect the supply cable from the
terminal box (figure 6, item 6).
2. AUO/ARO-ARP/AUZ-AUT/ART:
Support the fan, remove the nuts
from the four expansion bolts item 1
and take down the fan.
AZT:
Support the fan and remove the
nuts that fasten it to the ceiling plate
suspension bolts. Take down the fan.
3. AUO/ARO: Remove set screws item
2 and dismount silencers items 03.
Mark the silencers with tape so they
are not mixed up.
ARP/AUZ:
Remove set screws item 2
Fan types Intervals
CO-fans Once a year
Smoke fans Every six months
Unused fans Every three months
Table 5. Maintenance intervals