Coal-Trol on EFM 520

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vermontday
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Stoker Coal Boiler: EFM 520
Location: Bennington, VT

Post Thu. Dec. 08, 2011 6:41 pm

I and other EFM owners I know do the same as Mark, just two different settings for the year, one spring - fall and one for winter.
US dependence on foreign oil has created the greatest transfer of wealth in history.

Pacowy
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Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite
Location: Dalton, MA

Post Thu. Dec. 08, 2011 7:48 pm

chimley wrote:I'm sorry.....even if you are only burning in the winter, I find it hard to believe you make No adjustments.

Give me a break !
I can think of two circumstances where I might consider making an adjustment in the winter. First, if I switch to a different coal, I might go easy on the feed until I see how it burns. I might wind up using a different feed rate, or a different balance of feed vs. air.

Using the same coal, I might consider changing the settings based on the appearance of the fire. However, in my experience, a change in the appearance of the fire often is a sign that something other than the feed and air settings needs attention. For example, if the fire starts to look like it needs a little more air, what it might really need is a cleaning of fly ash buildup in the flue pipe.

I don't see how automation is going to add anything significant to the capabilities of the EFM's, or take the place of human judgment in the situations I mentioned. If it can be shown, I'll be happy to applaud, but for now I'm a skeptic.

Mike

chimley
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Hot Air Coal Stoker Furnace: Harman Magnum
Location: Shamokin, PA

Post Thu. Dec. 08, 2011 8:38 pm

Well....today I came home to an enormous fire!! As big as u can imagine! Bumped the air up to 6.5 with the same 3 teeth of feed and (drumroll).....all is right with the world again, thankfully. Enough of that....now back to the original purpose of this thread.

I realize that an EFM is capable of performing well with the proper settings. But I also believe that an automated control device would be something nifty to try on my furnace.

For the past 7 years I have done as some of you have indicated....adopted winter settings and summer settings. But honestly, a lot of times I felt I could be doing better...by maintaining lower temps and burning less coal. That is what I'm trying to accomplish.

chimley
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Hot Air Coal Stoker Furnace: Harman Magnum
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Post Fri. Dec. 09, 2011 9:30 am

2011-12-08 15.54.50.jpg
This is what I came home to yesterday.


chimley
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Hot Air Coal Stoker Furnace: Harman Magnum
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Post Fri. Dec. 09, 2011 9:32 am

I bumped the air up to 6.5...from 4.5...and this is what I got. much better. 3 teeth 140/170
2011-12-08 19.27.35.jpg
increased air

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Rob R.
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Stoker Coal Boiler: EFM DF520
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Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Fri. Dec. 09, 2011 10:43 am

How long had the stoker been running when you took the second picture? Your ash ring is much too large.

chimley
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Hot Air Coal Stoker Furnace: Harman Magnum
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Post Fri. Dec. 09, 2011 12:35 pm

I never cleaned it off from the BIG BLAZE...I hope to check it today and find a nice 2" ring of ash....

Unit ran (as needed) for about 5 hours before second pic was taken.

Pacowy
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Joined: Tue. Sep. 04, 2007 10:14 pm
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite
Location: Dalton, MA

Post Fri. Dec. 09, 2011 1:17 pm

chimley wrote:I never cleaned it off from the BIG BLAZE.
Never cleaned what off?

Mike


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Rob R.
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Stoker Coal Boiler: EFM DF520
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Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Fri. Dec. 09, 2011 1:21 pm

chimley wrote:Unit ran (as needed) for about 5 hours before second pic was taken.
You need to check the ash ring after the stoker has been running continuously for about 30 minutes.

chimley
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Hot Air Coal Stoker Furnace: Harman Magnum
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Post Fri. Dec. 09, 2011 2:28 pm

The ash ring you see in the pic...is a bi-product of the enormous blaze that was in there earlier.....I'm goin to check it in a couple hours...and I expect there will be a huge difference.

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Scottscoaled
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Post Fri. Dec. 09, 2011 5:51 pm

Looks to me like you need to turn the air down a bit. Your fire is starting to burn too deep in the pot. I personally would run 4 teeth with that setting. If you need 6.5 air to burn 3 teeth,, somethings either wrong with your airflow or you have some funky coal. The EFM usually burns close to the scale in the manual. sometimes more/less but close to the advised settings. last time I had a fire that looked like that, it was a preamble to a warped fines plate and then a holed burner plate. I'd look under the pot and make sure your fines plate is closing fully ;)
I think a man does what he can, untill his destiny is revealed. Right now that is trying to sell my EFM plate boilers in 520 and 700 sizes.

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