combined posts - pumping to/away piping math

Jeff Elston

Can you sketch out the rest of the manifolding ( supply and return)? How many feet to the highest pipe? vertical rise?
I have seen these things before. Piped in this way the pump at the boiler return was keeping a large header hot and keeping the flow through the boiler. I see some three way valves, if all the three way valves are stroked closed to the boiler supply then the boiler may not have the flow it needs.
good luck

[Deleted User]

combined posts - pumping to/away pump math

here's the drawing of the piping and the numbers; is the exp tank to discharge side of pump piped correctly, and is the pump correctly sized?

Unknown

What is

the circulator on the return being used for ? Is it running it's own zone ? I guess not if it's on 24/7 .

Are all the return pipes connected to this circ before it heads into the boiler ?

[Deleted User]

circs connected to boiler?

i believe so, and here are some pics but it's not easy to see it all

[Deleted User]

no, unfortunately,

i can't sketch it out because i don't have enough pics and i can't remember it all, but it's a 2 story bldg

Jeff Elston

Oh well