Greenheck Fan VSU Make-Up Air Unit with Direct-Fired Gas Heater 470654 - Manual (Page 25)

25 Model VSU Make-Up Air
®
Excessive Noise or Vibration
Troubleshooting
Sheaves aligned?
Align sheaves.
Reference: Maintenance - Routine, V-Belt Drives, pg. 31
Wheel unbalanced?
Clean and/or balance wheel(s).
Belts worn or loose?
Replace worn belts or tighten loose belts.
Reference: Maintenance - Routine, V-Belt Drives, pg. 31
Yes
Yes
No
No
Yes
Bearings worn or
need lubrication?
Replace worn bearings or lubricate bearings as needed.
Reference: Maintenance - Routine, Bearings, pg. 32
Yes
No
Wheel rubbing on inlet?
Adjust wheel(s) or inlet.
At this time noise and vibration
should be at acceptable levels.
Yes
No
No