Burner replaced
#1
12-12-14, 03:35 PM
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Burner replaced
Not sure if anyone will remember but this is additional info on this old thread I posted in 2012 on my NTI model NY-151 boiler.
http://www.doityourself.com/forum/bo...ner-flame.html
A little history, the boiler was factory equipped with a Riello F5 burner, however when I bought the house a Riello Mectron 5M was installed in the boiler. There was a sticker on it from the company that had the service contract. They must have swapped it into the boiler on a service call. I had set the draft to manufacturer spec and the turbulator to the Riello Mectron 5M spec for the nozzle in use. In 2013 I used a .85 and this year I put in a 1.1 as listed in the boiler spec. The air was adjusted to give 0 smoke and all was well or so I thought.
This week I came across a deal on a Riello F5 burner. I cleaned it up and put in a 1.0 nozzle and set the turbulator to make it equal to the NTI model NY-124 boiler spec. I adjusted the air to give #1 smoke then added air until I got a 0 smoke reading.
Something is drastically different since the F5 burner, last spring I had painted the housing of the boiler with Tremclad paint. Minutes after starting up the F5 burner I began to smell the paint. The Bottom half of the case gets pretty hot now that the F5 burner is installed. It just got warm with the Mectron burner. It's a dry base boiler.
In case there is something amiss, is there anything I should be checking?
Or is the F5 burner just that much better than the Mectron.
Draft at the breech was measured at -0.04 with both burners. Temp at the breech was 398 with the Mectron with 1.1 nozzle and is 385 with the F5 with the 1.0. The flame with the F5 looks a whole lot better with the F5 with no flame impingement. Perhaps this just goes to show the importance of following the manufacturers specs including don't just stick in another burner.
http://www.doityourself.com/forum/bo...ner-flame.html
A little history, the boiler was factory equipped with a Riello F5 burner, however when I bought the house a Riello Mectron 5M was installed in the boiler. There was a sticker on it from the company that had the service contract. They must have swapped it into the boiler on a service call. I had set the draft to manufacturer spec and the turbulator to the Riello Mectron 5M spec for the nozzle in use. In 2013 I used a .85 and this year I put in a 1.1 as listed in the boiler spec. The air was adjusted to give 0 smoke and all was well or so I thought.
This week I came across a deal on a Riello F5 burner. I cleaned it up and put in a 1.0 nozzle and set the turbulator to make it equal to the NTI model NY-124 boiler spec. I adjusted the air to give #1 smoke then added air until I got a 0 smoke reading.
Something is drastically different since the F5 burner, last spring I had painted the housing of the boiler with Tremclad paint. Minutes after starting up the F5 burner I began to smell the paint. The Bottom half of the case gets pretty hot now that the F5 burner is installed. It just got warm with the Mectron burner. It's a dry base boiler.
In case there is something amiss, is there anything I should be checking?
Or is the F5 burner just that much better than the Mectron.
Draft at the breech was measured at -0.04 with both burners. Temp at the breech was 398 with the Mectron with 1.1 nozzle and is 385 with the F5 with the 1.0. The flame with the F5 looks a whole lot better with the F5 with no flame impingement. Perhaps this just goes to show the importance of following the manufacturers specs including don't just stick in another burner.
#3
12-12-14, 05:11 PM
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Hi saves,
Both burners have the same length blast tubes and inserted to boiler spec, 1/4" inside boiler burner tube. Can't calc efficiency right now, the sensor in my CO2 meter is depleted and needs replacing. Over the fire draft was -0.01 with barometric damper set to control draft at breech to -0.04 per boiler spec.
Here is the boiler manual.
http://www.nythermal.com/pdfs/nyseri...tall_guide.pdf
Both burners have the same length blast tubes and inserted to boiler spec, 1/4" inside boiler burner tube. Can't calc efficiency right now, the sensor in my CO2 meter is depleted and needs replacing. Over the fire draft was -0.01 with barometric damper set to control draft at breech to -0.04 per boiler spec.
Here is the boiler manual.
http://www.nythermal.com/pdfs/nyseri...tall_guide.pdf
#5
12-12-14, 06:00 PM
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That's why I ask the question, NJ. Makes no sense, all I did was slide out the old burner and slide in the new burner and set the air damper for 0 smoke. I didn't even take off the burner flange. I use a hose clamp on the blast tube to ensure the proper insertion depth and loosen the clamp that holds the tube to the flange to slide it out. The only difference that I can see is it is noticeably brighter inside the firebox with the F5 burner. Nozzles in both burners are 80W. The blast tubes and turbulator disks are very different between the two burners.
#6
12-13-14, 04:35 AM
If I was servicing this boiler and found that much resistance to flow through the heat exchanger and the boiler was clean I would assume it was over fired . Did you check the pump pressure on the f5 ?
#7
12-13-14, 07:08 AM
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Not yet but I will. At the same outside temps, the ODR control fires the F5, with 1.0 nozzle, longer than it fired the Mectron, with 1.1 nozzle to maintain the same water temp. Which which would be expected given the btu input difference and both burners exhibited the same over fire draft. I would think the stack temp be much higher on one burner vs the other if one of them was over fired?
EDIT: saves, sorry for the confusion, I just realized that I typo'd the over fire draft down below... it should read -0.03!
EDIT: saves, sorry for the confusion, I just realized that I typo'd the over fire draft down below... it should read -0.03!
Last edited by imaddicted2u; 12-13-14 at 07:43 AM.
#8
12-13-14, 07:37 AM
The f5 has a different flame retention head as you noted, resulting in a more compact or tighter flame as you noted and probably has a higher temperature flame , this may be causing the boiler metal to be getting hotter. The location of the flame inside the chamber may be closer to the heated metal with the f5.
#9
12-13-14, 07:50 AM
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It might be normal for the boiler shroud to get warm with the right burner installed, I've never had reason to touch it before. If it wasn't for the odor from the tremclad paint I likely would not even have noticed the difference.
#11
12-13-14, 09:03 AM
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I painted the cabinet last spring. Been running with the Riello Mectron burner ever since and the shroud obviously didn't get hot enough to cause the paint to give off an odor where installing the F5 caused the odor right away. With the F5 the lower half of the cabinet is hot enough that you couldn't keep your hand on it for any amount of time but not hot enough to actually burn the paint off. The odor is subsiding since the burner has been running for a couple of days.
