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10" Flue Pipe- Open Tee- Coal to Gas Boiler

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CSACH
CSACH Member Posts: 9
edited May 8 in Chimneys & Flues
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So who would reposition the tee and add a DA draft regulator and who would scrap the whole thing even though the COAF is under 60 ppm, stack temp 400 after 15 minutes cold start up with a draft of -0.004-7, and the spillage at just inside the tee bottom is almost the same as through the breech?

Comments

  • mattmia2
    mattmia2 Member Posts: 17,467

    what kind of burner is on the boiler? how is it controlling secondary air and draft?

  • Big Ed_4
    Big Ed_4 Member Posts: 3,550

    Atmospheric burner its ok , a power burner its incorrect ….

    There was an error rendering this rich post.

    mattmia2
  • Bob Harper
    Bob Harper Member Posts: 1,175

    The chimney should be relined with ss sized to the application with the liner brought into the CAZ. That eliminates the need for a cleanout. Yours is way too low to meet code. The connector cannot be cemented into the masonry. Re-pipe it with a bullhead tee, x2 baro damper w/ spill switch wired to the burner. To get the proper gauge pipe, just use 24 ga. ss for a permanent vent connector unless you want to get 22 ga. black stovepipe.

    Your combustion analysis numbers were incomplete. Mainly, what was the O2? That is no draft- you need a minimum of -0.02wci for proper burning but not over -0.04. The baro would take care of that. Where did you take your draft reading- btw the boiler and the horizontal draft hood or btw the opening and the chimney? Big difference.

    Take the NCI course.

  • leonz
    leonz Member Posts: 1,864
    edited May 11
    EFM Stoker Boiler Unit Manual Model DF520.pdf

    If it were me, I would install a pair of auger fed EFM DF520 coal stoker boilers to tie into this original coal fired beautiful gravity hot water system and leave the chimney as is, but that is just me.

    EFM also has dual fuel DF520 coal stokers that operate on gas or oil

    The EFM DF520 has an 8 inch flue with a 3 inch steam chest tapping and two 2 inch return tapping's.

    You may be able to get by with one EFM DF520 and a gas burner as they are pressure tested and welded for steam service right out of the welding shop in Emmaus, PA.

    Mad Dog_2
  • CSACH
    CSACH Member Posts: 9
    https://forum.heatinghelp.com/discussion/comment/1896142#Comment_1896142

    Your crazy my dude! This was a cold start up and simple CO/draft check. Draft was taken at the breech and just inside the open tee. Been that way for 80 years. This boiler is going to be turned into a permanent basement museum piece because the piping is rotted around it.

  • Steamhead
    Steamhead Member Posts: 18,707

    What are you replacing it with?

    All Steamed Up, Inc.

    Baltimore, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting

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