Removal Of The Transport Safety Device; Deconservation - VEM W41 Series Installation, Operating And Maintenance Instructions

Installation, Operating and Maintenance Instructions (Translation)
It must be prohibited that foreign particles and liquids can fall into the fan of motors with vertical shaft orientation.
This shall be done as follows:
Shaft end directed downwards:
The protection cover of the fan is equipped with a protective roof (supplied condition).
Shaft end directed upwards:
For type of constructions with shaft end upwards the operator has to ensure that no foreign substances can fall
inside from above. For shaft ends directed upwards it must be prohibited that water or other liquids can penetrate
into the motor next to the shaft.
When setting up surface-cooled motors it must be observed that the bore for condensate drain is located at the
lowest point. If the bores are closed as standard, they must be closed again after the condensate is drained. When
the bores are open direct contact with water jets or water splashes must be avoided. A careful set-up of the motors
on completely level fundament is absolutely necessary to avoid tension during fastening. When machines must be
coupled exact alignment is necessary. It is recommended to use elastic couplings.
The key in the shaft end is secured by the shaft protective sleeve for transport and storage only. Because
of the danger that the key may be thrown aside, a start-up or a trial run with the key protected by the shaft
sleeve only is strictly forbidden.
Transmission components (such as couplings, pinions or belt pulleys) should be drawn onto the shaft by means of
pull-on devices or by heating-up the part to be drawn onto the shaft. For the purpose of drawing the transmission
components onto the shaft, the shaft ends are provided with tapped centring holes according to DIN 332 Part 2.
Transmission components must never be driven onto the shaft using hammer blows because the shaft, the bear-
ings and other components of the motor could be damaged.
All components that are to be fitted to the shaft end must be balanced dynamically according to the balancing sys-
tem of the motor (full or half key). The rotors of the motor are balanced with half key; this is indicated by letter H
after the serial number on the rating plate. Motors with letter F after the serial number are balanced with full key. If
possible the motors are to be installed in such a way that they are free from vibrations. With precision balanced
motors special instructions are to be followed. When the installation is completed the user must ensure protection
of movable parts and safety of operation.
Direct coupling to the driven machine requires a particularly accurate alignment. The shafts of both machines must
be in alignment. The shaft height is to be adjusted to that of the driven machine using appropriate shims.
Belt drives put a lot of stress on the motor because of relatively high radial forces. When dimensioning belt drives,
apart from the instructions and calculation programmes issued by the manufacturers of the belts, it must be en-
sured that the radial force permissible at the shaft end of the motor as stated in our data is never exceeded by the
pull and pre-tensioning of the belt. When pre-tensioning the belt during installation the instructions of the belt manu-
facturers must be strictly adhered to.
Relatively large radial forces or masses can be taken up at the end of the motor shaft by the use of cylindrical roller
bearings ("heavy bearing arrangement" VL). The minimum radial force at the shaft end must be a quarter of the
permissible radial force. The permissible shaft end load is to be taken into account. The information can be taken
from the tables and diagrams in the design selection data.
If the radial force falls below the minimum value, damage to the bearings can be caused within a few hours. Test
runs in no-load state only permissible for a short period.

7.2 Removal of the Transport Safety Device

On motors with transport safety device (roller bearing), the hexagon head screw provided for the fastening of the
transport safety device is to be loosened and taken off together with the transport safety device. Subsequently the
bearing cover bolt packed in a bag inside the terminal box is to be screwed into the bearing cover. If it is necessary
for the motor type the bag will also contain a lock washer that is to be placed onto the bearing end shield bolt be-
fore screwing it into the bearing cover.
After removal of the transport safety device micro movements of the rotor must be prevented by suitable
measures (risk of downtime damages).

7.3 Deconservation

The motor is conserve by the manufacturer. The conservation of machine parts must only be removed when the
installation starts at the installation site. The deconservation is done by using commercial solvents (i.e. benzine or
cleaning solvents).
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VEM motors GmbH-2013
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English