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  1. #1
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Oversized boiler replacement

    Replaced a oversized process boiler with a high efficient NTI. Isolated the boiler with a plate heat exchanger. Since install over a year ago more piping has been added to the process side. Been working great

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  3. #2
    Join Date
    May 2006
    Posts
    3,359
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    why all the water stains running down the old boiler exhaust piping did it leak? the new set up looks grate

  4. #3
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
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    2,881
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    Depending on the water temperature that you are running you might be OK, but I always cringe when I see PVC piping used for a boiler's flue pipe. The maximum temperature that PVC is rated for is 140F. Most boilers run hotter than that. In your install manual it probably says something about either using CPVC for the entire flue run, or at the very least starting your vent piping with a short chunk of CPVC before transitioning to PVC and then setting the boiler to run at a lower maximum temperature. If I'm not mistaken, these boilers even come with a short piece of CPVC for you to use.
    If at First You Don't Succeed, Skydiving Is Not for You.

  5. #4
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Thread Starter
    There is a short piece of grey cpvc on the exhaust on the left. Think it is only about 6 inches or so cant see it real well.

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  6. #5
    Join Date
    May 2006
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    why was the old boiler all stained up with what looks like condensation running down one side

  7. #6
    Join Date
    Jul 2018
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    Wisconsin
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    Thread Starter
    Roof leak

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  8. #7
    Join Date
    May 2006
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    dam that was one heck of a roof leak

  9. #8
    Join Date
    Mar 2007
    Location
    Madison, Wisconsin
    Posts
    2,412
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    I can never seam to get my fiberglass insulation to look that nice. Granted I only use it on steam boilers, but still, that looks so darn nice and clean.
    I r the king of the world!...or at least I get to stand on the roof and look down on the rest of yall

  10. #9
    Join Date
    Jul 2018
    Location
    Wisconsin
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    537
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    Thread Starter
    You talking to the insulator. All you need is a bucket of mastic lol. Hot water and steam are easy. Chilled water can be a *****. Eveything needs to be covered. Or you have a mess

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  11. #10
    Join Date
    Nov 2014
    Location
    Northern Idaho
    Posts
    789
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    So what are the main benefits to using a heat exchanger and isolating the boiler loop to that one load?

  12. #11
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Thread Starter
    Quote Originally Posted by GoCougs View Post
    So what are the main benefits to using a heat exchanger and isolating the boiler loop to that one load?
    Takes care of heated jackets in a chocolate production facility. The old system was non pressurized and product unded up in the boiler loop. We wanted to protect the boiler from that, keep it pressurized, and run inhibitor in the boiler loop. Would rather end up cleaning or replacing the heat exchanger than destroying the boiler.

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