9
Maintenance and service guide - LSN-FLSN ZONE
2 - Ex ec
5724 en - 2020.02 / c
4.3 - Preparation of the fixing support
Installers must pay particular attention to ensuring good
preparation of the motor fixing support.
Specific points to be observed:
• All metal supports must have undergone anti-corrosion
treatment.
• The design and the dimensions of the support must
prevent any vibration being transmitted to the motor, as
well as any vibration caused by resonance.
• The support must be level and sufficiently rigid to
enclose any short-circuit effects.
• The maximum level difference between the motor fixing
feet must not /- 0.1 mm.
0.1 mm max
Level straight-edge
Fixing feet position
4.4 - Coupling
Preparation
Rotate the motor by hand to detect any possible fault due to
handling.
Remove any protection from the shaft extension.
Drain off any condensation water that has formed inside the
motor by removing the plugs from the drain holes. Before
commissioning these plugs must be replaced and the motor
must exhibit the plated degree of protection.
Rotor locking device
For made-to-order motors with roller bearings, remove the
rotor locking device.
In exceptional circumstances when the motor has to be moved
after the coupling device has been fitted, the rotor must be re-
immobilized.
Balancing
Rotating machines are balanced in accordance with standard
IEC 34-14:
- half-key when the shaft extension is marked H.
When specifically requested, balancing may be carried out:
- no key when the shaft extension is marked N,
- full key when the shaft extension is marked F,
any coupling element (pulley, coupling sleeve, slip-ring, etc.)
must therefore be balanced accordingly.
Motor with 2 shaft extensions:
If the second shaft extension is not used, in order to
conform to the balancing class the half-key or key must be
firmly fitted in its groove so that it is not ejected during
rotation (H or F balancing) and to protect it against direct
contact.
4.5 - Important information to be taken
into consideration during installation
- Equipment to which this manual applies may not be
commissioned before the machinery in which it is installed has
been declared to conform to the Directives that apply to it.
- When motors are supplied by suitable electronic converters
and/or controlled by electronic command and control devices,
they must be installed by a professional who will be responsible
for ensuring compliance with the electromagnetic compatibility
regulations for the country in which the product is installed.
- As standard the motors’ impact resistance corresponds to
“low” mechanical risk, therefore they must be installed in a low
mechanical risk environment.
- All unused orifices must be blocked off using Ex threaded
plugs.
- All accessories (cable glands, plugs etc.) cited in this notice
must be of a type that is attested or certified for the group, the
application (gas and/or dust) and the temperature class which
correspond as a minimum to those for the location of the
equipment (see the information on the nameplate). They are
correctly tightened onto their support. A ‘’KLINGERSIL C-4400’’
fibre seal, for example, is placed between the cable glands, the
plugs and their support. Cable glands must be appropriate for
the supply cable and any auxiliary cables. The cables are
correctly gripped in the cable glands.
Fitting must comply with the requirements of their instructions
for use.
- The assembly of all these components must ensure the mode
of protection (Ex) and the protection indices (IP, IK) specified
on the nameplates.
- All threaded components must be fully tightened.
INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec
