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.
F
itting 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
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