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  1. #1
    Join Date
    Oct 2007
    Location
    Mount Gilead, Ohio
    Posts
    166

    rapid fire unit gas smell

    going to check out a rapid unit tomorrow they say they can smell gas when it comes on.was there 2 weeks ago for the same reason.we adjusted the gas pressure because it only smelled when high fire came on. now im thinking my digital manometer isnt reading the gas pressure correctly or maybe its something else.anyone got any other ideas
    thanks

  2. #2
    Join Date
    Oct 2007
    Location
    Mount Gilead, Ohio
    Posts
    166
    forgot to mention this is a direct fire unit, cant remember off the top of my head what the differential pressure is. Im sure the problem is with the high fire gas pressure because the gas smell comes for just a few seconds when the high fire comes on has anyone ever had a problem using a digital manometer on these. im going to takemy utube tomorrow to check
    thanks

  3. #3
    Join Date
    Oct 2007
    Location
    The rainy state
    Posts
    172

    rapid fire unit

    may i suggest you smoke test the heat exchanger

  4. #4
    Join Date
    Aug 2003
    Location
    Michigan
    Posts
    284
    How old is the unit if it's over 3 yrs old you may need to clean the burners.
    here's something to check go to high fire and see how much burner lift you
    have. might be time to drill the burner.

    Hope this helps

  5. #5
    Join Date
    Dec 2001
    Location
    Southern Tier, NY
    Posts
    6,066
    Quote Originally Posted by chilly123 View Post
    may i suggest you smoke test the heat exchanger

    there isn't any effin' ....Heat Exchanger ....

    go back to the Resi forum ...

  6. #6
    Join Date
    Dec 2001
    Location
    Southern Tier, NY
    Posts
    6,066
    Quote Originally Posted by techhead View Post
    How old is the unit if it's over 3 yrs old you may need to clean the burners.
    here's something to check go to high fire and see how much burner lift you
    have. might be time to drill the burner.

    Hope this helps
    good post ..

  7. #7
    Join Date
    Oct 2007
    Location
    Mount Gilead, Ohio
    Posts
    166
    thanks guys,
    checked out the unit today. forced high fire, gas pressure screw backed all the way out and carried a 4 foot flame at 5" wc, and tripping high limit. factory pressure rated 9.5, have -2.0" no fire pressure so I need 7.5". Called rapid,they say profile dampers adjusted wrong but magnahelic gauge reads .9,right in the middle of factory rating. going back monday w/ some help. unit is new install. I went to the factory 3 day class but but that is mostly startup procedures not troubleshooting and I dont have much hands on. I have no idea on this. Probably something simple. any ideas
    thanks again

  8. #8
    Join Date
    Dec 2001
    Location
    Southern Tier, NY
    Posts
    6,066
    gotta go back to design figures ...

    airflow

    delta p across damper

    gas press

    temp rise ...

    the solution ..

    is in them figgers

  9. #9
    Join Date
    Jul 2006
    Location
    Anytown USA
    Posts
    2,043
    Quote Originally Posted by slimwoodie View Post
    there isn't any effin' ....Heat Exchanger ....

    go back to the Resi forum ...

    thats was funny

  10. #10
    Join Date
    Dec 2001
    Location
    Southern Tier, NY
    Posts
    6,066
    Aaaahh...

    you'll fit in here Fine ...

  11. #11
    Join Date
    Oct 2007
    Location
    The rainy state
    Posts
    172
    Quote Originally Posted by slimwoodie View Post
    there isn't any effin' ....Heat Exchanger ....

    go back to the Resi forum ...
    you and i are talking about two different types of equipment,one of which is produced locally called rapid fire [ a industrial unit] and no i do not belong in the resi forum

  12. #12
    Join Date
    Dec 2001
    Location
    Southern Tier, NY
    Posts
    6,066
    [QUOTE=in-trane-ing;1664727]forgot to mention this is a direct fire unit,[QUOTE]


    Chilly 123 ...

    whassat ...???

  13. #13
    Join Date
    Dec 2001
    Location
    Southern Tier, NY
    Posts
    6,066
    Quote Originally Posted by chilly123 View Post
    you and i are talking about two different types of equipment,one of which is produced locally called rapid fire [ a industrial unit] and no i do not belong in the resi forum

    C'mon ... Chilly ..

    give it back ...

    the last Instuctor
    had a melt down ...

    rise above it ...

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