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Is this true P/S piping on a noritz condensing boiler

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bob eck
bob eck Member Posts: 930
Looks to me like this is a boiler bypass not true P/S piping
Thought please
Boiler only lasted 10 years

Comments

  • hot_rod
    hot_rod Member Posts: 22,256
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    Is that ball valved open or closed. Can we see more of the piping top the right? is there another circulator down stream?

    I have see tees used like that before, in P/S a ball valve does present some pressure drop between the tees maybe a few inches worth of pipe equivalent.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Ironman
    Ironman Member Posts: 7,379
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    Nah, that's a bypass, though it may not have been intended to be.
    What good is the LWCO installed below the boiler?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    Rich_49
  • unclejohn
    unclejohn Member Posts: 1,833
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    I just see a ball valve with the handle removed like a by-pass.
  • hot_rod
    hot_rod Member Posts: 22,256
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    if the valve is wide open, AND another circ down stream, I'd consider it an attempt at P/S.

    If the valve is closed and there is another circ downstream you have series pumps.

    If the valve is partially opened with a single pump it is bypassing some flow.

    If it is partially open and there are two pumps, hard to predict what type of flow rates are going on or how the valve position was determined.

    A manual bypass is a fairly simplistic boiler protection method. At one certain condition is is adequate :)
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,616
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    My guess is one pump no PS
    kcopp