9.10 IEC-fans: Replacing fan impeller
Fan unit:
1.
Service switch
2.
Fan guard
3.
Junction box
4.
Fan's locking screw
5.
Motor's fixing screw
To replace the fan impeller in IEC-fans:
1.
To remove the fan guard, unscrew the fixing screws.
2.
To remove the fan impeller, unscrew the locking screw.
3.
Pull out the fan impeller with an extractor.
4.
Clean and lubricate the shaft.
5.
Place the new impeller into the shaft.
Note:
Keep the wedge with the impeller.
Caution:
Do not knock the impeller into the shaft. The motor bearings damage easily.
6.
Spread silicone rubber sealing spray at the shaft end HI-TEMP 343 RTV.
Silicone rubber sealing spray prevents the water running along the joint between the impeller hub and the
motor shaft into the motor.
7.
Place a washer at the shaft end on the silicone rubber sealing.
8.
Lock the impeller hub into the motor axle with a fixing screw.
Use a strong enough torque (see
Table 4: Tightening torques for bolts grade 8.8 (EN ISO 898-1)
on page
42 ). When tightening the fixing screw, some sealing compound presses out through the washer edge and
hole. This shows that you have used enough silicone rubber sealing spray.
©
Alfa LU-VE, Rev-04
81
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
