Danfoss APP 1.0 Installation, Operation And Maintenance Manual page 41

Bearing size and type are specified on the rating plate.
Motor types HMA2 and HMC2 is as standard with lifetime
greased bearing with motor size ≤225.
Motor types MS and Y2E is as standard with lifetime greased
bearing with motor size ≤160.
Typical duty hours for lifetime lubricated bearings.
Frame size Poles
56 – 160 2 – 8
180 2
200 2
225 2
180 – 225 4 – 8
Motors with a re-greasing system must be lubricated with
high quality lithium complex grease, NLGI grade 2 or 3, with
a temperature range of between -40°C to +150°C.
Motors are normal fitted with a data plate with greasing
information; if it is missing use the following re-greasing
intervals.
Frame Grease 2 pole
size (g) (h)
160 20 4200
180 20 4200
200 25 3100
225 25 3100
250 35 2000
280 35 2000
315 50 1500
355 60 1000
400 80 800
Grease the motor while running, open the grease outlet plug
and let the motor run 1-2 hours before the outlet grease
plug is closed again.
Grease the motor for the first time during commissioning.
The following applies in general for both lifetime lubricated
and re-lubricated bearings:
At 60Hz the time will be reduced by app. 20%.
Data for vertically mounted motors are half of the above
values.
Typical lifetime
40.000h
35.000h
27.000h
23.000h
40.000h
4 pole 6 pole 8 pole
(h) (h) (h)
7000 8500 8500
7000 8500 8500
6500 8500 8500
6500 8500 8500
6000 7000 7000
6000 7000 7000
5500 6500 6500
4000 5000 6000
3000 4000 6000
180R9262 / IOM APP 0.6-1.0 Appendices - v02 / 12.2012
The table values are based on an ambient temperature of
25°C. The values must be halved for every 15K increase in
bearing temperature.
Higher speed operations, e.g. frequency converter drive will
require shorter greasing intervals. Typically, doubling the
speed will reduce the values by 50%.
6. Special note for Atex Zone 22 motors.
Notice for the use of electrical equipment in areas with
combustible dust.
Designation of motor according to EC directive:
Ex II 3D T125°C, IP55.
The dust hazardous 3-phase asynchronous motors are
in accordance with European standard EN 50281-1-1.
Combustible dust areas will be found in agricultural areas
and in industrial environments.
Only one electrical installation may be installed in one
specified area (zone).
Only certificated cable glands for category 2D may be used.
Unused glands must be closed.
Connections must be made in such a way as to ensure that
a permanently safe electrical connection is maintained,
both for the main supply and earth connection.
Installations must be in accordance with actual standards
for installation in the Zone 22 area.
It is recommended that EN 50281-2 is followed according
temperature and dust on the motor surface.
The use of motors with so much surface dust that the
motor temperature increases is not permitted.
Regularly cleaning is recommended.
The radial shaft sealing ring is part of the ATEX certification.
It is important that the ring is always intact.
The shaft sealing must be regularly checked, and if dry
it must be lubricated. It is recommended that the seal is
re-lubricated regularly.
Always use the original seal ring when replaced.
Replacing bearings also means replacing the seals.
All machines must be inspected regularly for mechanical
damage.
The user is responsible for changing parts in accordance
with the lifetime of parts, in particular:
bearings, grease and lubrication of shaft sealing.
Maintenance, repairs and replacement on zone 22 motors
must only be carried out by qualified specialists.
Motor Manual
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