VLT
®
FCM Series
■
Installation of the FC motor
FC motors must be installed with adequate access for
routine maintenance. A minimum of 0.75m of working
space around the motor is recommended. Adequate
space around the motor, particularly at the fan inlet
(50 mm), is also necessary to facilitate airflow.
Where several FC motors are installed in close
proximity, care must be taken to ensure that there is
no recirculation of exhausted warm air. Foundations
must be solid, rigid and level.
NB!:
Electrical installation
Do not remove the top foil inside the inverter part,
as this is a part of the protective arrangements.
Fitting pinions, pulleys and couplings.
These should be bored to our standard limits and fitted
on the shaft with a screwing motion. Attention must
be paid to correct guarding of all moving parts.
Tapping of fitments onto the FC motor shaft,
with a hammer or mallet, causes bearing
damage. This results in an increase in
bearing noise and a significant reduction in bearing life.
NB!:
Max. length of mounting bolts penetrating
the B14 flange, see section
Dimensions
in this chapter.
■
Alignment
When the application calls for direct coupling, the
shafts must be correctly aligned in all three planes. Bad
alignment can be a major source of noise and vibration.
Allowance must be made for shaft endfloat and
thermal expansion in both axial and vertical planes.
It is preferable to use flexible drive couplings.
Maximum permissible external axial and radial loads in N
1
- standard ball bearings
Horizontal shaft
Vertical shaft
Load towards
Load away
Shaft up
Shaft down
Frame
motor
from motor
load
load
load
load
size
Poles
Up
Down
Up
Down
Max. radial
2
80
2
275
441
481
245
294
432
638
4
373
549
569
343
392
520
785
90
2
412
638
598
294
373
520
824
4
540
765
716
402
471
628
903
100
2
853
853
932
932
814
814
1207
4
1010
1010
1118
1118
961
961
1393
112
2
853
853
932
932
814
814
1207
4
1010
1010
1118
1118
961
961
1393
132S
2
1059
1403
1570
952
1216
1305
1785
4
1265
1609
1825
1138
1472
1481
1972
132M
4
1256
1609
1854
1109
1501
1462
2040
1
All figures are based on Lna bearing life of 20,000 hours.
Lna = adjusted L10 life rating taking account of:-Reliability -Material improvements -Lubrication conditions
2
Max. permissible radial load at end of shaft (horizontal mounting).
MG.03.H3.02 - VLT is a registered Danfoss trademark
20