Danfoss FCM305 56 Instruction Manual page 28

Mechanical Installation of the FCM 300
Do not force fittings couplings, pulleys,
etc. onto the FCM 300 motor shaft, as
this will cause bearing damage,
increasing bearing noise and
significantly reducing bearing life.
To avoid overheating, the ambient temperature
o
should not exceed 104
hour temperature is not to exceed 95
more information, see "Derating".
Before installation, check unit for fan cover damage,
foot/mounting damage, shaft damage and loose
fasteners. Check nameplate data on motor.
The FCM 300 unit should not be mounted such that
the inverter portion of the unit (regardless of feet
position) is upside down.
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 (1N = 0.225 lbf) standard ball bearings
Load towards Load away
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).
6-2
o
F/40 C. The average 24-
o o
F/35 C. For
Horizontal shaft
from motor
441
549
638
765
853
1010
853
1010
1403
1609
1609
FCM 300 Series
Mounting Clearances
FCM 300 units must be installed with adequate
access for routine maintenance.
Minimum clearance = 29.5 in (0.75 m) on all sides
Minimum clearance at fan inlet = 2 in. (50 mm)
Where several units are installed in close proximity,
care must be taken to ensure warm air from units is
not recirculated.
FCM 300 units must be mounted on rigid, level
surfaces.
Fitting Pinions, Pulleys and Coupling
These should be sized to fit FCM 300 standard
dimensions.
Allowance must be made for shaft endfloat and
thermal expansion in both axial and vertical planes.
It is preferable to use flexible drive couplings.
Vertical shaft
Shaft up
load load
Up Down
481 245
569 343
598 294
716 402
932 932
1118 1118
932 932
1118 1118
1570 952 1216
1825 1138 1472
1854 1109 1501
MG.03.B6.2G - VLT is a registered Danfoss trademark
Shaft down
load load
Up Down Max. radial
294 432
392 520
373 520
471 628
814 814 1207
961 961 1393
814 814 1207
961 961 1393
1305 1785
1481 1972
1462 2040
2
638
785
824
903