Continuous product development at IV Produkt may give rise to specification changes without notice.
Flexomix 060-950
DU14.F.110907.05.EN
Inspection
1.
Sizes 060–360:
Remove the screws (item 1) and the pins/screws
(item 2) and withdraw the fan units (fan and motor
are mounted on slide rails).
2
1
Example fan unit sizes 060
–
360
Sizes 480–600:
Access to the fan is normally via the inspection
door. If required, remove the centre upright beam
(item 1) and fixed cover (item 2), remove the screws
(item 3) and the pins (item 4) and withdraw the fan
units (fan and motor are mounted on slide rails).
4
1
2
3
Example fan unit sizes 480
–
600
Sizes 740-950:
The fans are rigidly mounted and can be accessed
through the inspection door/doors.
2. Check that the impeller rotates easily, is in balance
and is not vibrating. Check also that the impeller
is clean from any accumulation of particles. Imbal
-
ance may be due to a coating or damage to the
impeller blades.
3. Listen to the sound from the motor bearings. If the
bearings are in good condition you will hear a slight
purring sound. A scraping or pounding sound may
mean that the bearings are damaged and servicing
is then required.
4. Check that the impellers firmly mounted and that
they have not shifted sideways toward the inlet
cone.
5. The fan impeller and motor are mounted on a base
frame fitted with rubber anti-vibration mountings.
Check that the anti-vibration mountings are firmly
mounted and are intact.
6. Check the condition of the mounting screws, the
suspension devices and the base frame.
7. Check that the gaskets on the connection plates
around the connection opening are intact and are
firmly fitted.
8. Check that the measurement tubes are firmly fitted
to their relevant measurement tapping.
9. Reassemble the fan units.
10. Check the airflows by measuring
Δ
p in the connec-
tions for flow measurement. Use the AHU’s flow la
-
bel and read which flow corresponds to measured
Δ
p.
Cleaning
1. Follow item 1-8 under
Inspection
.
2. Wipe the fan impeller blades to remove any coat
-
ings. Use an environment-friendly degreasing
agent.
3. The external surfaces of the motor should be kept
clean. Remove any dust, dirt and oil. Clean with
a dry cloth. If they are severely fouled, use an
environment-friendly degreasing agent. The motor
is likely to overheat if thick layers of dirt prevent air
from entering the motor to cool the stator structure.
4. Vacuum clean inside the air handling unit so that
particles will not be blown out into the duct system.
5. Clean the other parts in the same way as the impel-
ler. Check that the inlet cones are securely mount-
ed.
6. Follow item 9 under
Inspection
.
To reset the overheating protection
(EC motors)
1. Switch off the power supply to the fan motor.
2. Wait at least 20 sec. after the impeller has finished
rotating.
3. Switch on the power supply to the fan motor.
