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Interesting news today... (1 September)

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Jamie Hall
Jamie Hall Member Posts: 23,525
This one is an expensive lesson in proper installation of oil burners and the usefulness of automatic shutoff valves...

https://www.ntsb.gov/investigations/AccidentReports/Reports/MIR2219.pdf

In another one, I noted that people in the Denver area got all bent out of shape when their nice web connected thermostats got overriden by the power company to reduce the electrical load. What did they expect?
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
PC7060

Comments

  • Steamhead
    Steamhead Member Posts: 16,932
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    This is what happens when unqualified people work on combustion equipment. Fortunately, no one was hurt- this time.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • Dave Carpentier
    Dave Carpentier Member Posts: 602
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    Other than having an oil burner, I dont know much about that stuff.
    But I found it eyebrow raising that a 65 pound burner assembly was hanging off of just 2 screws. Why would there not be a collar and flange ? The failure of one screw (I would think it's more like a bolt ?) would be the start of the end, no ?

    30+ yrs in telecom outside plant.
    Currently in building maintenance.
  • Steamhead
    Steamhead Member Posts: 16,932
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    IIRC, what they describe as a "coupling" is actually a recess that is cast into the chassis. The air tube is inserted in this recess and the setscrews keep it from sliding out.

    The manual is here:

    https://carlincombustion.com/wp-content/uploads/601CRD-Instructions-MN33175-r2.pdf
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • Dave Carpentier
    Dave Carpentier Member Posts: 602
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    Thanks Steamhead. That makes more sense. So those act more like set screws and retainers, as opposed to holding the weight.
    The unit just vibrated itself off of the tube without the setscrews being tight ?
    Is that one of those moments when the tech realises that the screwbolt is stripped but "maybe it will be okay" ? Tapping a new larger screw would have been a bit of work.
    30+ yrs in telecom outside plant.
    Currently in building maintenance.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,710
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    Simple Carlin burner. Simple lack of maintenance. No one on board who knew anything about a burner.

    I always felt like the screws that mount an air tube to the burner would be better if drilled and tapped but I guess the air tube is too thin for that.

    But that burner design has been around for over 50 years without that being an issue.
    GGross