Motor Removal - NOVENCO ZERAX AZL-AZN-AZW Installation And Maintenance Manual

Motor
Poles
size
2
4
160
6
8
2
4
180
6
8
2
4
200
6
8
2
4
6
225
8
250
2
280
4
6
8
Table 5. Grease amounts and intervals for WEG
W22 TEFC motors – ball bearings

6.7 Motor removal

by blocking the fan rotors. PM motors can generate high voltages when the motor axles rotate,
even though the power is disconnected.
The below procedure is with reference to figures 12 and 13 beginning on page 26.
Motor removal
1. Dismount any ducts on the inlet and outlet sides.
2. Remove the screws (figure 12, comp. 1) that hold the hub
3. Remove the rotor centre bolt and washers (figure 12,
4. Fans with hub clips: Remove the hub clip, screws and
5. Dismount the rotor with a puller fastened in the threaded holes of the hub boss (figure 12,
6. Disconnect the motor cable from the motor.
7. Support the motor. See the technical fan specifications from the AirBox program.
Novenco ZerAx axial fan types AZL-AZN-AZW – Installation and maintenance
Lubrication
intervals [hours]
50 Hz 60 Hz
22000 20000
25000 25000
17000 14000
25000 25000
15000 12000
25000 25000
5000 4000
14000 12000
20000 17000
24000 20000
4000 4000
13000 10000
18000 16000
20000 20000
Switch off the power and disconnect the motor cable in the terminal box, before
beginning work on the rotor and motor.
For fans with PM motors, make sure the motor axles cannot rotate during service, e.g.
cap and remove the cap (figure 12, comp. 2).
comp. 3).
washers (figure 12, comp. 4).
comp. 5). See also figure 13. "Mounting of puller in Ø350 hubs with hub clips" on page 27
Lubrication
Motor
intervals [hours]
Poles
size
50 Hz
2 16000
4
160
6 25000
8
2 11000
4
180
6 25000
8
2 9000
4
200
6 25000
8
4 11000
6 16000
225
8 20000
250
4 9000
280
6 14000
8 19000
Table 6. Grease amounts and intervals for WEG
W22 TEFC motors – roller bearings
Avoid exposure of fans
and motor parts to
shocks, as these can
result in imbalance and
deformations. Motor bearings
and fan components are
vulnerable parts.
60 Hz
12000
25000
8000
25000
6000
21000
25000
9000
13000
19000
7000
12000
17000
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