Centrifugal Fans
Installation, Operation & Maintenance Manual
Mixed Flow Fans
IM-166
August 2022
This manual has been prepared to guide the users of mixed flow fans in the proper installation, operation and maintenance procedures
to ensure maximum equipment life with trouble-free operation. For safe installation, startup and operational life of this equipment,
it is important that all involved with the equipment be well versed in proper fan safety practices and read this manual. It is the user’s
responsibility to make sure that all requirements of good safety practices and any applicable safety codes are strictly adhered to.
Because of the wide variety of equipment covered in this manual, the instructions given here are general in nature. Additional product
and engineering information is available at www.aerovent.com.
REVIEW AMCA PUBLICATION 410 PRIOR TO INSTALLATION
Table of Contents
Fan Arrangements ........................................................................2
Exploded View..............................................................................2
Impeller Nomenclature ................................................................3
Impeller Rotation
.........................................................................3
Safety & Hazard Warnings ...........................................................4
Shipping & Receiving....................................................................4
Handling .......................................................................................5
Unit Storage .................................................................................6
Foundations and Supporting Structures
...................................7-8
Fan Installation, Factory Assembled Units
...................................9
Bearing Installation
....................................................................10
Safety & Bearing Lubrication Instructions
.................................11
Drive Mounting
..........................................................................12
Motor Support Adjustment .......................................................13
Maintenance ..............................................................................13
Motor Maintenance ...................................................................13
Drive Maintenance .....................................................................14
Fan Bearing Maintenance ..........................................................14
Impeller and Shaft Maintenance
...............................................14
Structural Maintenance .............................................................15
Duct Connections
.......................................................................15
Serial Number & Fan Type Nameplate ......................................15
Impeller Placement / Impeller Overlap .....................................16
Troubleshooting Guidelines
.......................................................17
Installation / Start-up Checklist
..................................................18
Fan Maintenance Log .................................................................19
Refer to the safety section(s) in this manual prior to installing or servicing the fan. The most current version of this installation and maintenance
manual can be found on our website at www.aerovent.com/resources/im-manuals.
SAFETY NOTICE
