Posted by Dale Van Aken on December 28, 1997 at 15:20:46:
In Reply to: Re: Re: New boiler system over-pressure posted by Tony Conner, TBP Industrial Steam Systems on December 28, 1997 at 11:30:40:
Tony: Thanks for the informative response. I should explain the piping: The main manifold is 1 1/2 copper. It feeds six zones (only 3 in use) - each 3/4 copper. I meant that when only one zone is calling, the pump (Taco 011) is driving the loop through a long run of 3/4. Seems like this would create resistance on the inlet side and a lower pressure near the make-up feed. Following is the piping: Outlet from boiler, make-up feed, T-fitting splits into 2 main loops. Hot water loop continues through indirect tank and rejoins the inlet. Hot water loop goes thru check valve, expansion tank, then supply manifold. Seem like a reasonable location for the make-up water? P.S. Where can I get a copy of the book to which you refer?