Got a unit I'm working on that looks like someone put the wrong size belt on it and it came off and got torn up so I'm unable to make a good measurement on it.

I've checked both Lennox's residential and commercial online documentation and archives and can't find the manual for this air handler.

Date code looks to be around '85.

Can anyone help me with this? There is also a blower number of 64C2001 on the unit.

Thanks!