Alfa Laval LeviMag, Instruction Manual, Page: 16 / 68

3 Installation
The instruction manual is part of the delivery.
Study the instructions carefully and pay special attention to the warnings!
The mixer is for permanent fastening.
Make sure that the motor corresponds to the environment.
3.5 Drive Unit - WP81
CAUTION
Always be sure that the weld plate is correctly installed in the tank and that it has not changed shape during welding – see
"Welding guidelines for Alfa Laval LeviMag
®
".
WARNING
It is critical for the impeller to be mounted before installing the drive unit.
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Step 1
Ensure the total run-out on the magnetic drive rotor is maximum 0.2 mm. See section 8.11 Measuring of total run-out.
WARNING
Protect the magnetic drive rotor on the drive unit from collecting particles.
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Step 2
Ensure the bearing and impeller (1) is mounted before mounting
the drive unit (2).
WARNING
Beware of risk of crushing fingers due to the strong magnetic
forces between the drive unit and the impeller.
NOTE
During the installation be sure that the drive unit is supported to
avoid tipping over or dropping to the floor.
4307-0026
1
2
Step 3
Hold the drive unit firmly and align the drive unit with the weld plate. Adjust gear motor orientation in order for this to clear tank
legs and according to section 8.8 Mounting angle. The motor must always be pointing upwards.
Step 4
Apply mounting screws without tightening these fully.
Step 5
Making certain the weld plate and drive unit flange are completely flush, tighten the mounting screws according to section 8.9
Tightening torque for screwed connections.
Step 6
CAUTION
Check for levitation!
Push the impeller downwards against the weld plate – possibly
using the lifting rod tool – the impeller should travel axially minimum
0.5 mm – otherwise it is not levitated correctly.
If not, ensure both bearings are installed correctly, flange is flush
against the bottom of the weld plate.
Lubricate the bearings with e.g. water and recheck levitation.
4307-0027
NOTE
For programming and installation of frequency converter see section 8.12 Connection to frequency converter.
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