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  1. #53
    Join Date
    Mar 2001
    Posts
    1,213
    The picture of the burner - top right - the orifices appear to be plugged? If so, could be your problem...will affect ignition & flame sense.

  2. #54
    Join Date
    Jun 2006
    Location
    New Jersey
    Posts
    4,337
    It's calling for 8" at the burner? Seems pretty high for that type of burner. And you adjusted that at max fire? If that is all good, have you tried lowering the airflow abit, just to see what would happen. With a VFD is would be real easy. Also what the flame look like at minimum and maximum fire? It should real steady, if not airflow or gas pressure isn't right(assuming the burner is good, which it does from the picture)

    I can't see how upgrading to a pilot setup with solve your problem, but again I don't have much experience directly lighting those burners. So who knows, maybe it's a bad setup and that why the manufacture is suggesting a pilot upgrade.

  3. #55
    Join Date
    Jan 2011
    Location
    minnesota
    Posts
    23
    when fails, always fails on ignition. can hear spark, but does not light. The burner orfices have been cleaned. Gas press. after honeywell valve is 8.5"wg.

  4. #56
    Join Date
    Dec 2010
    Location
    Central US
    Posts
    417
    Quote Originally Posted by relay320 View Post
    when fails, always fails on ignition. can hear spark, but does not light. The burner orfices have been cleaned. Gas press. after honeywell valve is 8.5"wg.
    Ok now we are getting somewhere.

    Need to be 100% sure that the spark electrode gap is per factory.
    Need to be 100% sure that spark is at electrode end and not sparking through wire to ground or at any other point of origin. (Per your pic it appears you have the spark electrode assembly with remote flame sense. make sure the electrode ground bar is not broke or missing or the tip burnt off I have attached the fenwal manual with all the good poop in it. If all is good?????

    On ignition when your control is sparking with your volt meter on the low fire valve, make sure you have voltage (when failing) and you actually are moving gas through low fire valve. (You know where im heading) and it is reaching your burner orphices. Just confirming we dont have a failing low fire valve.

    Now you have me just as curious to see this resolved without parts changing unless necessary.
    Attached Images Attached Images
    Last edited by emcontrols; 01-30-2011 at 06:43 PM. Reason: added attachment

  5. #57
    Join Date
    Jan 2011
    Location
    The midwest.
    Posts
    18

    ?

    If its sparking not proving , fails to ignite, it may be as simple as dirty feeder tubes, sounds like everyone else has brought up every other posible problem.

  6. #58
    Join Date
    Oct 2012
    Location
    southeastern idaho
    Posts
    1

    i have seen this before and it kicked my butt for awhile

    This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread.

    You can find the rules for posting and qualifications here.

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    Last edited by jpsmith1cm; 10-24-2012 at 05:04 PM. Reason: non AOP member

  7. #59
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,579
    Jecidaho

    This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread.

    You can find the rules for posting and qualifications here.

    Additional infractions may result in loss of posting privileges.

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