Results 1 to 13 of 15

Hybrid View

  1. #1
    Join Date
    Feb 2006
    Posts
    5

    pilot light going out

    5 burner steam table, usually the lights on either end will go out, maybe once or twice a day. Tech has come out, and re-placed thermocouples, modules and such. Told kitchen staff same thing I have tried to tell...draft problem, but they insist it's the table itself. So just to prove our point, I said to re-place the parts, to a $1000 + bill. Pilots still going out. There are a couple of fans around, so I take them down (excuse to clean them) and monitor the situation. The ladies on night shift say they have no problems with them going out, just the day shift.
    Question, how much of a draft does it take to blow out a pilot light? Any other solutions or things to try? Remember, working with women who "know it all"

  2. #2
    Join Date
    Jun 2007
    Location
    Bucks Co PA
    Posts
    364
    This may or may not apply to your situation.

    I have a Direct vent propane fireplace insert. The installers said they used to put in an intake all the way up to the top of the chimney, but that caused the pilot to go out. Draft was too strong. Now they put it about 1/3 to 1/2 of the way up and no problems.
    .

  3. #3
    Join Date
    Feb 2004
    Posts
    2,463
    Have you tried watching the pilots as you turn each burner on? If the pilots shrink as more burners come on and the flames are reduced on the t'couples this will give you a starting point. Typically undersized line, line valve partially closed, line valve has grease in the core, flex (if equipped) undersized. I'm kind of shooting from the hip, but I have seen this many times. I have seen problems such as this when restaurants add lines without respect to proper sizing of lines and meter capacity.

  4. #4
    Join Date
    Dec 2004
    Location
    Albuquerque, NM
    Posts
    104
    I have seen this problem several times on gas steam tables. Usually the flame is hunting for oxygen and snuffs out the pilot. This is probably related to a negative air balance in the building. I hope this helps.
    Mark

  5. #5
    Join Date
    Dec 2000
    Location
    Flat Rock, NC
    Posts
    463
    your reply of problem only occurring during dayshift leads me to believe gas supply pressure issue. higher gas usage causes pressure to drop. you don't spec nat or propane or 1/2lb or 2lb system.

  6. #6
    Join Date
    Nov 2007
    Location
    Westlock, Alberta, Canada
    Posts
    57
    mike3 makes alot of sense, that would be a very good starting point. Maybe audit all the appliances on the line and compare to sizing charts. Gas is like water, it wil follow the easiest path, low pressure will allow it to flow through the main burner and bypass the pilot.

  7. #7
    Join Date
    Mar 2008
    Location
    Florida
    Posts
    193
    Would check if any work has been done on the exhaust hood and the fresh air make-up. Three pilots out of five do stay on and the two end pilots are going out. Makes me think towards grease falling into pilots, especially if they are the burners doing the most heating. Also check your fresh air vents that they are clean, only way to do that is to take them down and look. Two person job and no fun. Have cleaned a plenty that the help promised were cleaned recently, cleaning what you see does'nt quite do the job. If this does'nt solve the pilot problem then I would start looking into new gas valves.

  8. #8
    Join Date
    Mar 2007
    Location
    Regina SK Canada
    Posts
    20
    If the two end ones are going out then i would think it is a walk by draft issue and then you may have to install a shield to stop the drafting.

  9. #9
    Join Date
    Nov 2000
    Location
    Memphis TN USA
    Posts
    6,945
    Had one like that. Replaced pilot assemblies. Went out again. On my third trip out there, busboy propped open back door to take out trash. This door is a good 20 feet away. When he closed the door, pilot popped out. Built a draft sheild for it.

    I have also bend t'couple assembly a little to get better flame on t'couple. NEVER try to bend pilot hood. It breaks before it bends even a nanometer.

    Good luck, those can be a pain. Hopefully the owner has a little patience and confidence in you.
    If the superheat ain't right it ain't charged right.

  10. #10
    Join Date
    Aug 2008
    Posts
    322
    Ihave seen burners cycling on heat control when they relighted they would light hard knocking out the pilot lights on the end

  11. #11
    Join Date
    Nov 2000
    Location
    Memphis TN USA
    Posts
    6,945
    Sometimes you can get an oversized thermocouple. Can't remember what they are called, but I will think of all day tommorow. Used to put them on a lot of boilers.

    They stay warm when the pilot flame flickers
    If the superheat ain't right it ain't charged right.

  12. #12
    Join Date
    Feb 2004
    Posts
    2,463
    Quote Originally Posted by kim View Post
    Sometimes you can get an oversized thermocouple. Can't remember what they are called, but I will think of all day tommorow. Used to put them on a lot of boilers.

    They stay warm when the pilot flame flickers
    Husky by Penn-Baso ??

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