Leroy-Somer X20 AC GEARLESS, Installation And Maintenance Manual

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4
INSTALLATION AND MAINTENANCE
X20 – 30 – 36 – AC GEARLESS
LEROY-SOMER
3141 en - 02.1999/ a
4.5 - Brake adjustment
Before carrying out the adjustments, disconnect
the brake supply.
4.5.1 - Spring adjustment
Adjust the ∆
l
dimension of the springs (see figure 3) to obtain
the braking torque complying with the elevator code in use.
Maximum values for
∆
l
are in technical catalogue.
- Unlock the counter nuts 45 and 151 .
- Adjust the spring length to ∆
l
with counter nuts 45 .
- Lock the counter nuts 45 and 151 .
4.5.2 - Plunger stroke adjustment
Dimension x must be adjusted around 11 mm to obtain
0.1mm minimum air gap between the brake shoe and drum
(see figure 4 and drawing page 6 and 7):
- Dismantle the brake covers
83 .
- Unlock the counter nuts 55 .
- Use screws 41 to enable a wedge of x mm thickness to slide
under the plunger head. Adjust both side of the brake at the
same time.
- Lock the counter nuts
55 .
- Reassemble the brake covers.
Once the adjustment is done, connect the brake supply.
Release the mechanical system which immobilized the
car before the adjustments.
4.6 - Filter
Motors are fitted with filter F to protect the gearless machine
from dust. Remove the filter F after cleanning the machine
room and the hoist way when the building is beginning to be
inhabited.
5 - SERVICING
5.1 - First operation
Check that electrical machinery is properly grounded
before carrying out the first operation to protect the
staff from electric shock.
Run the machine and check the following points:
- abnormal noise,
- vibrations,
- action of switch contacts,
- all fixings and electrical connections are fully tightened,
- the state of the bearings,
- abnormal running,
- that the blower motor is rotating in the correct direction.
- Check also the currrent and the voltage on the machine
when it is running with rated load.
Important: never run the machine without the blower
switched on.
5.2 - Maintenance
During service visits, for an optimized life expectancy of the
machine, proceed with the following operations.