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oil burner won't fire

edracer
edracer Member Posts: 9
in THE MAIN WALL
Hi, I just replaced my tankless bypassed aquastat l8124a with a new l8148e. circulators come on, burner won't fire. Power to B1 & B2 connections is good, what's going on?

Comments

  • newagedawn
    newagedawn Member Posts: 586
    edited November 2017
    see if you have power to the primary black wire, if so then primary is bad, power in no power out of the control
    "The bitter taste of a poor install lasts far longer than the JOY of the lowest price"
    Solid_Fuel_Man
  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,646
    I assume the TT is jumped on you primary still?
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    Ummm isn't an L8148E for gas? 24v to burner circuit and you need 120v.
    https://customer.honeywell.com/resources/Techlit/TechLitDocuments/60-0000s/60-2278.pdf

    There was an error rendering this rich post.

    HVACNUT
  • edracer
    edracer Member Posts: 9
    Shows 28 acv when checking at b1 & b2
    Not sure what jumping the tt means?
  • edracer
    edracer Member Posts: 9
    Looks like 28 in the control as well?
  • edracer
    edracer Member Posts: 9
    Idk plumbing supply place sold it to me?
  • edracer
    edracer Member Posts: 9
    Thanks STEVEusaPA, that was the problem! They sold me wrong one. New one in, three heat is on!! Thanks all
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    You got lucky it wasn't the other way around, sending 120 to a gas valve.

    There was an error rendering this rich post.

  • neilc
    neilc Member Posts: 2,854
    /\
    how bad could that have gotten?
    cook the gas valve ?
    or bigger kaboom ?
    known to beat dead horses
  • Leon82
    Leon82 Member Posts: 684
    Unfortunately you have to double check even at a plumbing store.

    I saw the owner tell his worker to get a natural gas water heater. And then told him he would be fired if he brought a propane unit. So how many times has he messed that up.
  • edracer
    edracer Member Posts: 9
    another question for you guys. upstairs thermostat calling for heat. circulator comes on, oil burner doesn't fire. only fires when downstairs thermostat is calling for heat?
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    Could be wired wrong, or could simply be the boiler is up to the high limit, and the aquastat is holding off firing the burner.
    Can you post a sketch on how you have it wired?

    There was an error rendering this rich post.

  • edracer
    edracer Member Posts: 9
    no changes to wiring, it used to work fine. there is a relay before the aquastat tstats, & line in come through it. boiler temp is below by 90 plus degrees?
  • Alan Welch
    Alan Welch Member Posts: 270
    Do you have terminals zc and zr on the new control, we're they used on the old? 8124 and 8148 are different controls.
  • edracer
    edracer Member Posts: 9
    No, all the same writes used on both.
    Alan Welch
  • HVACNUT
    HVACNUT Member Posts: 6,332
    You went from an aquastat that maintains temp to a high limit only, cold start. The first floor zone is connected to TT in the aquastat so if fires to limit and runs that circ on a heat call. Nothing on the switching relay for the upstairs zone is telling the burner, "hey, I need heat. It will run the circ only. You need to utilize ZR,ZC. What model is the switching relay for the upstairs ?
  • edracer
    edracer Member Posts: 9
    wires I meant to type wires!
  • Alan Welch
    Alan Welch Member Posts: 270
    HVACNUT got what I didn't feel like typing. The supply house still didn't sell you what you needed. When you use a different control you have to know what the previous control strategy was, and what you have to do to compensate. Easier to just replace like with like.

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