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  1. #14
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    Aug 2016
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    On Lennox furnaces with 7 segment display, you can only check flame signal from board by means of button by display. If you try and check with meter in series you're reading will be scrambled and bounce around and not be accurate. You're reading will most likely be anywhere from 10-20 uA when taken from board

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  3. #15
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    Quote Originally Posted by technocratic View Post
    Check your ground as well. Most flame rectification issues are actually grounding issues. Test neutral to ground. Voltage should be below 2 vac

    Sent from my SM-G935T using Tapatalk
    Sorry.

    Most issues are bonding issues. Once the furnace board is willing to start the firing cycle, a ground problem is meaningless.

    The ECG has nothing to do with flame rectification.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







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  5. #16
    Join Date
    Apr 2007
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    USA
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    Timebuilder:
    What is a Hvac electrical specialists?
    What's would happen if there was no equipment ground from the panel but the ignition control was bonded to the cabinet? Is this ok?
    What would happen if there was no equipment ground from the panel but the transformers 24vac common was bonded to the cabinet?
    What if the manufacture wired multiple transformers in parallel then bonded the 24vac commons to the cabinet with no equipment ground? Is that ok?
    If there was a proper equipment ground and I ran more green wires from the equipment ground lug to the to the bonding terminals on the cabinet. Is this ok? Would the transformer and ignition control then be bonded or grounded?

  6. #17
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    HVAC Electrical Specialist is a designation granted by RSES after both the CM and the Specialist examinations are successfully passed. Most takers for the CM do not pass the first time, and most CM's do not take the electrical exam.

    In my case, I passed the CM on the first sitting, and then took the electrical, and attained the highest score of all takers, winning the Imperial Award.

    If you would like to go through a paragraph of electrical questions, I am more than willing... in the Pro area. With over 60 posts, you can apply for Pro membership by using the link in the bottom of my signature line, and when you get the Pro status, post again in the Pro section.

    See you there.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







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  8. #18
    Join Date
    Apr 2007
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    USA
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    Hey Timebuilder I applied for that. I did do the RSES thing as a young tech. My boss insisted. Tech to tech I just wanted to hear about bonding?

  9. #19
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    Quote Originally Posted by ace57745 View Post
    Hey Timebuilder I applied for that. I did do the RSES thing as a young tech. My boss insisted. Tech to tech I just wanted to hear about bonding?

    I reserve the finer points for the Pro area.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  10. #20
    Join Date
    Jul 2012
    Location
    WA
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    I have seen new residential furnaces run fine without a ground. Not saying it's good, or safe, but it works.

  11. #21
    Join Date
    Apr 2010
    Location
    California
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    Dear Ace: It appears you have angered our award winning, UA, Hvac Electrical Specialist!!!!!!!! LMAO !!!!!!!!!!!!!
    Attached Images Attached Images  

  12. #22
    Join Date
    Nov 2014
    Location
    Portland, Oregon, United States
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    Quote Originally Posted by timebuilder View Post
    Sorry.

    Most issues are bonding issues. Once the furnace board is willing to start the firing cycle, a ground problem is meaningless.

    The ECG has nothing to do with flame rectification.
    Timebuilder, I respect the depths of your knowledge, as I have seen you put forth some really great responses towards others asking for help. If you would help me to understand flame rectification and bonding better, I would appreciate it.peehaps there is a subsection in these forums you could direct me? I also read a post concerning your brother, and i offer my condolences. Hope you are having a pleasant evening, and look forward to your response.

    Sent from my SM-G935T using Tapatalk

  13. #23
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    First, Steve is Bret's brother. I posted his email in the memoriam section because he said what I would have said. Bret's fight was not only personally heroic, but an example of a willingness to try things now that could help others later.

    Also, I would be happy to help. Since you are a Pro member, make a post in the Pro section and I will get to it. I have a trac pipe class tonight, but if I have time after work and before the class, I will try to get started then.

    There are lots of fairly good articles around on flame rectification. I have one that I can post in the Pro section. I have been too busy to write my own article....but I might as well for the book.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  14. #24
    Join Date
    Nov 2006
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    Southeastern Pa
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    Quote Originally Posted by lzenglish View Post
    Dear Ace: It appears you have angered our award winning, UA, Hvac Electrical Specialist!!!!!!!! LMAO !!!!!!!!!!!!!
    Wow..that is a coooool Bela Lugosi picture!!!!

    I'm not mad. I just like to keep the tech stuff mostly in the Pro section.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  15. #25
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    Apr 2007
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    USA
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    Zeng:
    He is avoiding my questions. Because if he awnsers them he again will make himself look foolish. At the same time mad respect for the guy. He had a lot of accomplishments. I just don't agree that improper equipment grounding does not effect flame rectification. In most cases it is against the manufactures recommendations. You just can't do that! They must be followed.

  16. #26
    Join Date
    Nov 2006
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    Southeastern Pa
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    I'm not avoiding anything.

    I simply do not share a lot of technical information with unvetted people in the open forums.

    Now you can say anything that you like.....I don't care that you're wrong.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







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