Installation Of The Fc Motor; Alignment - Danfoss VLT FCM Series Manual

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.

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.
Maximum permissible external axial and radial loads in N
Load towards
Frame motor
size Poles
80 2 275
4 373
90 2 412
4 540
100 2 853
4 1010
112 2 853
4 1010
132S 2 1059
4 1265
132M 4 1256
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).
20
Horizontal shaft
Load away
from motor
441
549
638
765
853
1010
853
1010
1403
1609
1609
VLT
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.
Allowance must be made for shaft endfloat and
thermal expansion in both axial and vertical planes.
It is preferable to use flexible drive couplings.
1
- standard ball bearings
Vertical shaft
Shaft up
load load load
Up Down
481 245 294
569 343 392
598 294 373
716 402 471
932 932 814
1118 1118 961
932 932 814
1118 1118 961
1570 952 1216
1825 1138 1472
1854 1109 1501
MG.03.H3.02 - VLT is a registered Danfoss trademark
®
FCM Series
Shaft down
load
Up Down Max. radial
432 638
520 785
520 824
628 903
814 1207
961 1393
814 1207
961 1393
1305 1785
1481 1972
1462 2040
2