Replacing Roof Ac Fans - ABB ACS580MV Hardware Manual

Replacing roof AC fans*

1. Stop, de-energize and ground the drive following the steps in section Shutting down
the drive for maintenance before you start the work.
2. Switch off the motor starter of the fan unit to isolate the fan unit from the auxiliary
power supply. To identify the motor starter, see the ACS580MV Wiring Diagram.
3. Remove the hex-head combination screws (M6x16) that attach the top cover to the fan
box. Lift the top cover and pull it away from the fan box.
M6X16
4. Disconnect the connector and make sure that the supply connector is detached from
the support beam.
5. Remove the four hex-head combination screws (M6x16) that attach the support beam
to the side plate of fan box frame.
NOTICE
For some types of fan boxes two additional hex-head combination screws must be
removed.
6. Fix the lifting eyes to the support beam. Attach lifting gear, appropriate for the weight
of the impeller, to the lifting eyes. Lift off the support beam and the impeller attached to
it.
4 M6X16
combination screw
combination screw
Maintenance 113
Support beam