Problem: Gas burned in front of the boiler. Cause?


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Old 12-15-10, 06:30 AM
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Problem: Gas burned in front of the boiler. Cause?

Hey guys,

Anybody has an idea of what might cause this random gas burning outside the water boiler - right before the gas enters the boiler? (Seems like a "backfire" or not enough pressure - just my thoughts).
The picture below shows the location of it and possibly gives you an idea of what I mean. It happened where the red circle is.

Yfrog Photo : yfrog.com/5fcopyofimg00041j
 
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Old 12-15-10, 08:36 AM
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Low gas pressure or a severely damaged orifice in that burner.
 
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Old 12-15-10, 09:40 AM
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Clean your burners asap. Spider webs, dust. If it still happens after cleaning call someone. If you dont know what your doing please call someone for your own saftey.

THIS CAN BE VERY DANGEROUS.

Mike NJ
 
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Old 12-15-10, 09:59 AM
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thanks for the replies,

Furd: If the low pressure was the case, would the increase of pressure on the gas valve do the job?
second, does the orifice go bad over the years (just like many other things in life)? Any way to tell if it is damaged?
I've never heard anybody having similar issue - doesn't seem to be a common problem.

Mike NJ: the burner was cleaned beginning of this season - vacuumed, no dust or any kind of debris is there. I do realize it is dangerous, I'm looking for possible causes/options. Sometimes there are simple solutions, sometimes not
 
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Old 12-15-10, 10:20 AM
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Unless you have a manometer (very low pressure gauge) you cannot properly adjust the gas pressure. No, orifices do not "go bad" unless they are acted upon by a foreign source. It could be spiderwebs like Lawrosa mentioned or it could be dirt or rust or something that came over with the gas inside the piping. It could be spiderwebs inside the burner tube that are disrupting the jet stream of gas that comes from the orifice.

Without the proper tools and the training this is not a DIY job.
 
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Old 12-22-10, 11:29 AM
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I had a service call for excessive soot in the boiler room. The boiler also had flame as you described. Checked all kinds reasons, and took all kinds actions, but what I found was that the heat exchanger was totally sooted up. Cleaned it DIRTY job. Problem fixed. Further research showed that they had large LP tank that they would let run low. LP supplier tells me that under 25% capacity can result in soot.
 
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Old 01-09-11, 04:28 PM
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late update on the issue,

I called the local gas company and a service man adjusted the gas pressure on the gas valve, so far so good.

it's been three weeks now and no problems.
 
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Old 01-09-11, 05:36 PM
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Did he say it was low?

Knockin' on wood here...
 
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Old 01-09-11, 05:42 PM
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Originally Posted by pete123 View Post
I called the local gas company and a service man adjusted the gas pressure on the gas valve, so good.
The fuel valve at the boiler? I ask, because the gas man often won't adjust things inside your house unless you have a service contract.
 
 

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