11 / 32
IOM BX-BE-BN-MX-ME-M_eng - Translation of original instructions in Italian - Rev 02_0 - 30/09/16
Delta
connection
Star
connection
Motor terminal board
Auxiliary terminal board
Brake
6
MAINTENANCE
Before any intervention, the motor, auxiliary circuits and/or accessories must be disconnected from
the mains.
In particular:
- check disconnection from the electrical mains,
- provide suitable protections from exposed live parts,
- duble check that accidental restarts are not possible under any circumstances.
It is recommended that periodical checks of motor operating conditions are scheduled as a routine
maintenance practice.
Check particularly on the following:
1) check that operation is smooth and absorbed current within rated value;
2) On brakemotors, check condition of the brake, gauge the air gap “T” and play “X” of the manual
brake release device;when provided
3) keep motor clean and fan cowl unobstructed by accumulation of dust or foreign particles;
4) check that seal rings are in good condition;
5) check that lead-in wires and all wirings are safely and tightly secured;
6) If condensate draining holes are provided, remove periodically the screws that close the holes and
allow the condensate to drain. On installing the motor make sure that the drain hole is located at the
lowest point.
7) standard bearings are grease packed for life and in general no periodical maintenance is re-
quired; it is good practice however to check their condition and eventually replace them after approx.
3 years.
The motor does not have to be removed for normal inspections unless the bearings need to be re-
placed. In this case, the operations should be performed by specialised personnel and with appropri-
ate tools.
6.1
Adjustment of air gap on motors with d.c. brake (FD) or a.c. brake (FA).
Loosen nut ref. 2
Depending on motor frame size adjust the air gap and set dimension T to the min. value indicated in
diagram through either socket head screws ref. (1) or nut ref. (3).
Then after hold firmly screw ref. (1) and lock it by tightening nut ref.(2).
