7. Disconnect high-voltage and low-voltage fan-motor wiring from the fan-motor electric
component inside the electric panel. Cut cable ties as needed.
8. Using the removal device shown inserted in Figure 10.6 below, slide the fan module out
through the front of the unit.
9. To reinstall the fan module, reverse these steps. Remove the field-supplied fan-removal device
before resuming operation.
NOTE: Refer to the unit's electrical schematic for specific wire-attachment points.
Figure 10.6 Slide EC fans out of the unit
Item Description
1 Rear frame channel (right-sidepanel not shown)
2 Front channel
3 Fan-removal devices
10.2.5 Removing EC Fans from Upflow Units
WARNING! Risk of electrical shock. Can cause serious injury or death. Open all local and remote
electric power disconnect switches and verify that power is off with a voltmeter before working
within the electric connection enclosures.
WARNING! Risk of extremely heavy fan modules dropping downward suddenly. Can cause
injury or death. Fan modules weigh in excess of 125-lb (56.7-kg) each. Support fan modules
before removing mounting hardware. Use caution to keep body parts out of fan module
pathway of movement during removal. Only properly trained and qualified personnel should
work on this equipment. More than one person may be required to complete the assembly and
installation. Installer(s) must be properly trained and qualified to lift, move and manipulate very
heavy equipment from floor level to the top of the unit.
Wear appropriate, OSHA-approved PPE when moving, lifting, installing, and removing the fan
(s) and plenum. Read and follow the lifting equipment and/or ladder manufacturer's operating
instructions and safety requirements.
10 Maintenance 63
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