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Old 01-26-2014, 10:37 AM   #1
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Boiler Flame


Does this flame look right? Burnham Seires 2 NG boiler. The blue portion looks to be "attached" to the burner rather than above the burner.

Boiler Flame-100_1033.jpg

Boiler Flame-100_1034.jpg

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Old 01-26-2014, 10:51 AM   #2
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Boiler Flame


flame suppose to be blue with yellow tip. 2nd picture looks a little weak.
only way to tell is to check gas pressure from the gas valve using a monometer.

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Old 01-26-2014, 01:55 PM   #3
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Originally Posted by hvac instructor
only way to tell is to check gas pressure from the gas valve using a monometer.
Not the only only. Clock the boiler's input using the gas meter.
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Old 01-26-2014, 02:35 PM   #4
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Originally Posted by hvac benny View Post
Not the only only. Clock the boiler's input using the gas meter.
OK, so I assume with all other gas appliances off, I watch the meter while the boiler runs. That will give me cfm. What do I do with that number?
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Old 01-26-2014, 02:59 PM   #5
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Boiler Flame


All other gas appliances off.
The unit you are wanting to test..... running for a couple of minutes.

3600
x the calorific value of the gas in your local area (1050 here)
x the size of the dial on your meter that you are measuring (.25 /.5 / 1 )
divided by the seconds it took that dial to rotate once.

Compare that with the BTU's on the rating plate of your boiler.
There is another adjusting figure to multiply if your meter is metric.

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Old 01-26-2014, 03:21 PM   #6
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How do I determine the caloric value? My gas is 1.048 therms per CCF.
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Old 01-26-2014, 03:51 PM   #7
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How do I determine the caloric value? My gas is 1.048 therms per CCF.
That will be 1048btuh/cf.

Last edited by hvac benny; 01-26-2014 at 05:03 PM.
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Old 01-26-2014, 04:05 PM   #8
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Boiler Flame


So if I'm following the concept correctly, I'm going to compare what the unit is using to the input rating (198,000 btu/hr) and see if it's low or high. That will tell me if I need to get someone out to adjust the gas valve, correct?
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Old 01-26-2014, 04:54 PM   #9
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How do I determine the caloric value? My gas is 1.048 therms per CCF.
Thats 1048 BTUs per CF.

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