View Full Version : AHU V-belt wear
02-28-2005, 10:51 PM
Has anyone come across an article that discussed V-belt wear for air handling units with both variable pitch and fixed pitch motor puleys driving fixed pitch fan pulleys? I would be interested in applications both without VFD's (fan cycles on and off based on occupied/unoccupied cycles for a full voltgage starter and for the same used with a VFD for soft start). Normal maintenance instructions recommend changing drive belts annually but I have not seen any articles discussing extended belt life in excess of three years.
Your input is appreciated.
03-01-2005, 07:49 AM
Good question. I've heard the same thing with VFD's or soft starts changing your belts once a year. However I've examined my belts and change them on a as needed basis.
03-01-2005, 06:07 PM
Change them as needed and check the tension monthly if you can. No need to replace anything that doesn't need it!
03-05-2005, 12:14 PM
Whats everyones take on when blets get that shinny look to them I have notice on large fans producing 2" staic that in 3-4 months time they get a glazed look to them,VFD speed is higher from months ago,,so change them......
Hospital fans-40,000 cfm
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