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Need help with testing old Gas valve on old American Standard Boiler

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Joseph_4
Joseph_4 Member Posts: 278
Hi
I have a customer with an old American Standard Boiler.. He has a really old gas valve.. the power is on pilot on but boiler not firing.. does anyone recognize this valve and which terminals should i test for 24 volts to open valve up to see if valve is dead. Here are some pics.
thx
Joe Hardoon
HHI services


Comments

  • Joseph_4
    Joseph_4 Member Posts: 278
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    here is one more

  • nicholas bonham-carter
    nicholas bonham-carter Member Posts: 8,578
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    It looks like an old Basso switch there, and sometimes the button will be binding on the cover, and will prevent the button from fully returning, and therefore preventing the proving of the pilot.—NBC
  • Joseph_4
    Joseph_4 Member Posts: 278
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    the pilot itself lights with a new baso box... you can see it at bottom front of boiler.. is that what u are referring to?
  • ch4man
    ch4man Member Posts: 296
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    your Baso switch is open. the red button is up indicating its open.
    open it up and see if you have a voltage drop across the switch.
    clean the pilot, replace the thermocouple and please check the venting and flue gasses for CO levels.
    I;d hate to go through all that just to condemn it due to safety concerns but it must be done
  • ch4man
    ch4man Member Posts: 296
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    upon second look, it may be a boat anchor.
    zoom in on the gas valve and you'll see a terminal broken off. (a detroit lubricator with a hydraulic safety, very cool)

    might be able to moderize the boiler but not financially worth it
    DZoro
  • Joseph_4
    Joseph_4 Member Posts: 278
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    what is a boat anchor?
  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,646
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    Boat anchor is referring to an old inefficient boiler or furnace which may still run but is using fuel so inefficiently by today's standards it should be replaced.
    Definitions by SFM
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
  • nicholas bonham-carter
    nicholas bonham-carter Member Posts: 8,578
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    Sharp eyes ch4!—NBC
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,721
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    If they can make it through the winter SAFELY that system ought to be replaced
  • JUGHNE
    JUGHNE Member Posts: 11,086
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    The lighting instructions imply more than one pilot.
    I service one of these that has 4 pilots. They all must be lite and holding on their thermocouple before the Baso switch will hold to energize the gas valve. Assuming the wires are connected to it.