Oil Fired Rig switching off

[LMP Maple]

Did a test fire of my rig today. This is my second season with the unit. Today when I went to start it, it would light and go out after about 20 seconds or so. It did this 4 times. I then checked my oil line to make sure it was flowing. After confirming this I adjusted the air band to 20 and it fired, caught and was fine. I boiled water for about a hour without a problem. I had this problem once last year on a windy day when I was trying to boil but on the third try it lit and was fine.
I am wondering for those of you boiling with oil have you experienced this. It is a small rig with a 7" stack. I am also wondering if the stack cover I have from home depot may be to blame. It is vented all the way around but I have noticed that most people have open hats when they are boiling. I have resisted buying one of these due to the cost. Just wondering if that might be preventing good airflow? Also do any of you have to fool with the air bands on the burners. My dad has a 3x10 in Vermont that is oil fired. They never test fire it just wait for the first good run and roll and have never had an issue. Thanks for any ideas or help.

[maple flats]

Most oil fired rigs have a barometric damper, that may be the issue, ask an oil burner man.

[LMP Maple]

Bit the bullet and bought a real stainless flapper and installed it. Boiled last night and it went well no issues. Hopefully that was my issue.

[maple flats]

I suspect you might need to bite another bullet and get a barometric damper still.

[LMP Maple]

Yep I think you are right. I hope to add that to the list for next year. Hopefully I can get through this season. Thanks for the advice on that. I found an old post where a person was having the same issue and the barometric damper solved the problem. Sounded like he was able to adjust the flapper and it helped but the real solution was the damper. This is good, my wife gets worried when I do not spend money during the off season.:lol:

[wiam]

No need for a barometric damper. I do not have one on my 3x12. I could show you a 4x12 and a 6x16 that do not run one. These are completely different than an oil burning heating unit.

[Brian]

The only time you need a barometric damper is like a 3 story house with a big chimney that draws to much air on the combustion chamber. This snuffs the flame out of the oil furnace. You can check with with a device that goes in the stove pipe and reads draft. Other than that, new furnaces don't get installed with barometric dampers either.

[maple flats]

OK, I guess I'm old school. I have been corrected, thank you Brian and wiam.

[wiam]

The only time you need a barometric damper is like a 3 story house with a big chimney that draws to much air on the combustion chamber. This snuffs the flame out of the oil furnace. You can check with with a device that goes in the stove pipe and reads draft. Other than that, new furnaces don't get installed with barometric dampers either.

His is the 4x12 I mentioned. :lol:

[bill m]

I have been oil fired since 1999. No barometric damper and mine runs great.

[maple flats]

Apparently I can't use my years of furnace work back in the 70's thru the mid 90's to answer oil fired questions, I will try to remember that. Back then any oilfired boiler or furnace I dealt with had a barometric.