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6.8.3 Consequences
When operating the product via a frequency converter, please be
aware of these possible consequences:
•
The locked-rotor torque will be lower. How much lower will
depend on the frequency converter type. See the installation
and operating instructions for the frequency converter used for
information on the locked-rotor torque available.
•
The working condition of bearings and shaft seal may be
affected. The possible effect will depend on the application.
The actual effect cannot be predicted.
•
The acoustic noise level may increase. See the installation
and operating instructions for the frequency converter for
advice as to how to reduce the acoustic noise.
7. Starting up the product
Check the oil level in the gearbox or shaft seal housing. The oil
must fill up between 50 and 75 % of the gearbox/shaft seal
housing.
CAUTION
Pressurised system
Minor or moderate personal injury
- As pressure may have built up in the oil chamber,
do not remove the oil level screw until the pressure
has been fully relieved.
If required, fill oil into the gearbox or shaft seal housing through
the oil-filling hole (2). See figs
39
quantity, see section
10.4.1 Oil quality, gearbox or shaft seal
housing.
If the mixer or flowmaker has been stored and not used for a long
period before startup, see section
Checks before startup:
1. Check that the propeller is rotating in the correct direction.
See section
6.6 Direction of
2. Make sure that the mixer or flowmaker is completely
submerged in the liquid.
The mixer or flowmaker must always be submerged
during operation.
3. Make sure that there are no solid objects in the tank.
4. Confirm that the mixer or flowmaker is not hanging by the
lifting wire or the power cable. The mixer or flowmaker must
be resting on the depth blocker.
5. Make sure the mixer or flowmaker is set at the correct depths
and angles according to sections
5.4 Installing a
flowmaker.
6. Start the mixer or flowmaker. Allow the mixer or flowmaker to
reach full speed and then confirm current consumption
compared to the data for the mixer or flowmaker.
Make sure that no persons can fall into the tank.
20
and 40. For oil quality and
10.3 Service
chart.
rotation.
5.3 Installing a mixer
and
8. Handling and storing the product
8.1 Transporting the product
The individual components of the mixer or flowmaker must be
packed carefully to prevent any damage to the surface protection
during transportation.
Make sure that the mixer or flowmaker cannot roll or
fall over.
Before attempting to lift or otherwise handle the
individual components of the mixer or flowmaker,
observe any local regulations that set limits for the
weight of the components to be lifted manually by
individuals without the use of lifting equipment.
All lifting equipment must be rated for the purpose
and checked for damage before any attempts to lift
the components are made. The lifting equipment
rating must under no circumstances be exceeded.
8.2 Storing the product
Store mixers and flowmakers in a dry location in which the
temperature is not subject to major fluctuations.
Do not expose the flowmaker propeller blades to direct sunlight
for more than one month.
If the mixer or flowmaker has been stored for more than one year,
change the gearbox oil. Change the oil even if the unit has never
been in use. This is necessary because of natural aging of
mineral oil lubricants.
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