Results 1 to 13 of 13

Thread: make up air ?

  1. #1
    Join Date
    Feb 2004
    Location
    Ohio
    Posts
    276

    Hmm

    Eng. A ? I can get the pilot valve to open and it will light but will not bring on main valve. Fireye flame guard, flame rod as sensor. Not getting any signal back from flame rod, adjusted no help, changed rod no help, cleaned ground rod on burner and that did not help. I am down to the controller but not sure, so if any one can help here I would thank you.

  2. #2
    Join Date
    Jan 2003
    Posts
    126
    Check wire from rod to flame control.

  3. #3
    Join Date
    Feb 2003
    Posts
    102
    whats the fireye m#?
    is the amplifier replacable?

  4. #4
    Join Date
    Jun 2004
    Location
    Richmond Virginia
    Posts
    1,078
    Get the book on the fireye. It should give you the flame signal value and I think there's a way to get the history out of it as well.

  5. #5
    Join Date
    Mar 2003
    Posts
    7,321
    could be the amplifier, could be the wiring to the main fuel valves is not correct. could be a problem with the fuel valve itself. do you get a flame signal? do you get voltage sent out to valves? pull wiring from valve and check for voltage at the correct time, or does the controller lock out prior to trying to open the maion fuel valve?

  6. #6
    Join Date
    Feb 2004
    Location
    Ohio
    Posts
    276
    the fireye is the M series, I changed the connection to the flame rod it was good. I am not getting any readings at the amplfier. It shoul;d be 6-18 dcv, the amp. is replaceable and it is MC 120.
    The fireye is not seeing the pilot but there is one, I even went as far as getting inside the unit to see the flame it is a good pilot flame. strong.

  7. #7
    Join Date
    Nov 2001
    Location
    Moose Jaw, Saskatchewan, Canada Occupation:Interprovincial Plumber, Commercial Gasfitter Interests:
    Posts
    2,412
    Does the flame signal pass through the air switches? Air flow is always an issue. What model of mua?
    I love my job, but paydays Thursday

  8. #8
    Join Date
    Aug 2002
    Location
    manitowoc wisconsin
    Posts
    4,943
    The flame rod is not the only thing that should cleaned.I would also clean the pilot assy.If you have a flame rod that is not an o.e.m. part it could be grounding out on the burner.Take a look at the rod as it sets in the burner.Is the rod touching anything?If it is to long cut it down a little.most mua's I have worked on will not even allow for ignition trial if there is a safety fault.I would say that if everything is clean,the rod or wiring to it is not grounding out,& you have a pilot flame then it would be a pretty safe bet to replace the fireye flame protector.

    [Edited by markwolf on 02-24-2005 at 01:06 AM]
    Take your time & do it right!

  9. #9
    Join Date
    Apr 2002
    Posts
    11,808
    Ice on flame rod

    Dirty burner like mark says

    check wiring to rod, check for ground continuity from burner to fire eye
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  10. #10
    Join Date
    Mar 2004
    Location
    Columbus Ohio
    Posts
    328
    Keep in mind that the air switches are in the flame signal
    circuit like Rich says. If its not that then perhaps the
    fireeye is failing to put adequate ac voltage to the flame
    rod.

  11. #11
    Join Date
    Feb 2004
    Location
    Ohio
    Posts
    276
    cleaned and blew out pilot assembly with nitrogen, did not look does the pilot come before main valve in the wireing diagram. I thought that the pilot makes that means that the air switch is made.

    sorry that it is taking so long to get back, I am just running myself tin. But thanks for the input.


    I did not make it ther today but tommorro looks good hopefully.









  12. #12
    Join Date
    Feb 2004
    Location
    Ohio
    Posts
    276
    no ice on flame rod that is certain

  13. #13
    Join Date
    Nov 2004
    Location
    up in the hizzy
    Posts
    1,376
    If the pilot lights up,the fireye is getting the microamps signal back and also proven air flow,If you are getting voltage readings to the amplifier inputs but its not putting the dcv signal out to the main valve,then either the amplifier or the fireye are to blame.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event