Burnham piping diagrams ?

I recently moved into a 1925 house with one pipe system and a near-new Burnham boiler. Bought Dan's book and found out the size is correct and original steam lines are basically OK, but there are multiple flaws in the near-boiler piping due to a lazy install (copper, four 1.5" elbows between header and main, etc etc). I could probably improvise with the info in the book, but I'd like to see the manuf's recommendations. But when I look on Burnham's web site, the Install manual has absolutely zip about near-boiler piping recommendations. In fact nothing about piping at all. Help ???