HELP! Plumbing Closed loop wood boiler to indoor boiler

Jcc583 Posted By Jcc583, Nov 30, 2018 at 6:31 PM

  1. Jcc583

    Jcc583
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    Nov 30, 2018
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    Good afternoon I’m having some trouble with plumbing my closed loop wood boiler into my indoor propane boiler. I have a 125 gallon buffer tank and my design is based on the simplest pressurized storage sticky. I think I piped my supply and return into poor location. I almost think I need to flip flop them. My wood boiler is 50’ away in an outdoor wood shed. The lines are 1 1/4” O2 barrier pex. I started with 300 gallons of storage but had issues so I now have 125 gallons and will be adding another 125 soon. I may have had an air lock issue but I couldn’t get my supply line to pump hot water into buffer tank. The return kept getting hotter and hotter and yes I triple checked my plumbing. My pictures will hopefully explain better. You will see my return for buffer is piped into my return manifold right before the pump, I think this is working against me! I appreciate all help!!! [​IMG]
     
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  2. Woodman1

    Woodman1
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  3. Jcc583

    Jcc583
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    95DD7672-FC01-41B7-A86D-4E4AAA0EFA1F.jpeg 81257AD9-532B-4F19-9633-A9606DF03658.jpeg EB3BCE07-E9AF-4AFB-B02D-07A1AA4928CA.jpeg 36280CB0-0371-4DBF-B5FA-1B82488E4CF8.jpeg 81257AD9-532B-4F19-9633-A9606DF03658.jpeg 5F246EA7-53B0-4BD6-BB2A-E9ABD18182BA.jpeg 19AF4FEC-BEFA-4457-9B9C-CCD9C61FEF15.jpeg 7765E6C6-5E7B-46B5-B25F-5F9671D897E5.jpeg 5BF4ADF9-960D-4096-AE3D-58C014D31D06.jpeg EF606E31-E629-4226-9807-9203F8ABF90A.jpeg 903F55DC-3772-4218-8CED-F23C6EB96A1A.jpeg CE034B0F-7233-4366-8695-4935515D0F5D.jpeg 2C68F91D-ADC0-470A-BDD8-2AC7F9930EA1.jpeg 37249181-8D1C-4146-93FC-8E08D6055A59.jpeg 18CF7259-255A-48FB-8079-4C68DA29BFB3.jpeg E0A2A97C-5923-4EBB-B31A-B0FA004EF05D.jpeg Added 1DA35288-7049-4E02-AA4C-E8D994FD08AE.jpeg 1DA35288-7049-4E02-AA4C-E8D994FD08AE.jpeg 37249181-8D1C-4146-93FC-8E08D6055A59.jpeg 18CF7259-255A-48FB-8079-4C68DA29BFB3.jpeg E0A2A97C-5923-4EBB-B31A-B0FA004EF05D.jpeg
     

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  4. Jcc583

    Jcc583
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    I just posted more it’s waiting approval, I have the pictures in my profile aswell. Thanks!
     
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  5. Gasifier

    Gasifier
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    Why are the two valves closed?
     
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  6. Gasifier

    Gasifier
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    Or are there four valves closed?
     
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  7. Jcc583

    Jcc583
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    Pictures aren’t during operation. Valves are closed till I get working correctly
     
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  8. Gasifier

    Gasifier
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    So what controls the circulation pump? Aqua stat turns pump on at certain temperatures?

    Sorry. I’m no plumbing expert. Just trying to see where everything goes in pictures is tough. Maybe a little more explanation of how System works will spark someone to ask the right question (s). ?
     
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  9. Gasifier

    Gasifier
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    I had mine plumbed like simplest pressurized storage sticky as well. Plumbed in parallel to oil boiler.
     
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  10. Jcc583

    Jcc583
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    That is exactly how mine is aswell
     
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  11. Gasifier

    Gasifier
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    So was there heat demand from somewhere to turn circulating pump on?
     
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  12. Gasifier

    Gasifier
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    Apr 25, 2011
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    I’m really hoping someone who knows much more than I do about this chimes in! LOL

    How much do you know about this stuff? Is this your first time doing this?
     
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  13. Jcc583

    Jcc583
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    I ran with and without a call. It’s ran by a taco 501 and a r89a with a break on rise aquastat. All zones are ran parallel, end switch’s powers load circulator and oil boiler based on aqua.
     
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  14. maple1

    maple1
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    You might need to clarify some things. Like - what is the exact problem? I think you said can't get wood heat to buffer. But you also said return gets hot? Which sounds like heat is going thru buffer? Kind of hard to follow piping flows in pics. Can you add arrows? But I see a couple of high spots that would make real good airlock spots, with no bleed points.
     
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  15. Jcc583

    Jcc583
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    This shows flow bleeders and air separaters. Thanks! FA33CB65-33B1-4A79-B3F0-AFCDC4BE0DDA.jpeg
     
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  16. Jcc583

    Jcc583
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    I was also concerned with this return manafold and my position next to pump. I was thinking that pump could create a pull on my buffer return line. As my wood boiler climbed to around 260• my oil boiler ended up blowing off at the pressure relief valve! 39E03C20-591E-4D5F-850E-506435D48B5C.jpeg
     
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  17. Jcc583

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    You can see check valves in each line circled in white
     
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  18. Jcc583

    Jcc583
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    Weighted I forgot to add.
     
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  19. Jcc583

    Jcc583
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    Other thought is maybe my three speed pump from boiler was pumping directly to system and not cycling through buffer as designed. Just throwing thoughts out.
     
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  20. maple1

    maple1
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    Think you need to go one step at a time.

    My first step would be get the wood boiler going, open the two ball vales on the pex coming in, & observe what happens.
     
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  21. maple1

    maple1
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    That would mean your wood heated water is going right to your system when it is needed. Which I wouldn't call a bad thing?

    Might still be my eyes, but I still am not seeing bleed points on those two high loops to the right of the tank.
     
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  22. maple1

    maple1
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    And which way are those check valves allowing flow? I haven't checked out that sticky for a long time, but something isn't looking quite right there.

    I have to go out for most of the day though so won't be back to this for quite a while.
     
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  23. TCaldwell

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    I tend to think it might be the above thought. Also I believe the purge valves are on the wrong side of the ball valves on the zone returns, if you opened the purge valves you’d be purging the boiler instead of the zone.
     
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  24. Woodman1

    Woodman1
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    To start, the tees in the storage are oriented wrong. Should be a straight shot from wood boiler to storage. Supply and return to house should be going up from tees. Next, it looks like a big air trap where the circulator is with no way to vent. Those are a couple places I would start
     
  25. Jcc583

    Jcc583
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    So I need to turn the tees towards the direction of the wood boiler and add a air vent in top section of load supply? Is the supply and return from storage into house manifold the correct idea?
     
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