IEC-fans: Replacing fan motor
WARNING:

Each fan is equipped with a fan guard and a lockable service switch. The wire spacing in the fan guard and the safety distance of the blade correspond to the European safety standard. The safety guards are protections from contact only.

Do not remove the safety guard before the fan is shut down. The rotating impeller may catch in your clothes, cut you or pull you in.
WARNING:

Before starting the service operation, ensure that the electrical supply is reliably isolated; use the lockout/tag-out system. Always check with a voltmeter that the unit is electrically isolated and shut off.

WARNING:

Only an authorized electrician may perform the electric connections.

WARNING:

Sharp edges. Use protection glasses, safety gloves, shoes and clothes.
See Fan unit structure

To replace the fan motor in IEC fans:

  1. Use the service switch to switch off the current.
  2. Close the switch.
    Use lockout and tagout.
  3. Remove the fan guard.
  4. Remove the fan impeller.
    See IEC-fans: Replacing fan impeller.
  5. Open the junction box and ensure that the motor is dead.
  6. Remove the electric cable.
  7. Unscrew the four fixing screws of the fan motor.
  8. Lift the fan motor up.
  9. Install the new fan motor in reverse order.
    See Tightening torques for bolts grade 8.8 (EN ISO 898-1)
  10. Install the fan impeller.
    See IEC-fans: Replacing fan impeller.
  11. Check the minimum blade point gap.
    The minimum blade point gap is
    • 3 mm for fan Ø914
    • 5 mm for fan Ø1240
  12. Replace the fan guard.
  13. Check the correct rotation direction and the fan's general functioning on a test run.

Always use spare part motors available from Alfa LU-VE to guarantee their applicability to the operating conditions.