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First time I saw one of these

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STEVEusaPA
STEVEusaPA Member Posts: 6,505
in THE MAIN WALL
Would love to see an internal schematic of this. Works perfectly on a 2 zone fin tube baseboard system from the 50's (original steel expansion tank).
Does anyone know what's going on in there?
Thanks
Steve

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Comments

  • Ironman
    Ironman Member Posts: 7,376
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    I've never seen it either, but a wild guess would be its flow check/air chamber/air vent all in one.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,533
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    Never seen that either. I think @Ironman nailed it!!
  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,646
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    Interesting that there's an auto air vent on there and the compression tank.
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
    IronmanCTOilHeat
  • CTOilHeat
    CTOilHeat Member Posts: 56
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    Solid_Fuel_Man said:

    Interesting that there's an auto air vent on there and the compression tank.

    My thought too. Exactly why it would be nice to see an internal mechanical diagram here. I have seen one of these before but the tapping used for the vent here was plugged.
  • CTOilHeat
    CTOilHeat Member Posts: 56
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    Quick thought is the auto air vent stopped working a long time ago and now has no effect on system operation.

    Just a guess, though.
    Solid_Fuel_Man
  • Ironman
    Ironman Member Posts: 7,376
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    Maybe it's constructed so that whatever air that doesn't go into the tank goes to the vent before it goes to the system?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    edited December 2017
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    @ironman Yeah I kinda figured that too.

    There actually is a tap marked 'Vent', where the vent is attached if you zoom in. I don't know what the other tap, that looks like a screw that could be turned, does.
    There are flow checks on the supply loops too, but maybe whoever originally installed it didn't know about an internal one.
    Maybe I give Watts a call Monday, and/or check for patent info.
    Was hoping maybe Dan may remember one, in one of his books.
    Thanks for the comments everyone.

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    CTOilHeat

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