EFM Video

Re: EFM Video

PostBy: vermontday On: Sun Mar 20, 2011 9:48 pm

It must be because the coal came lightly oiled that we did not have any problems with the winter coal truck delivery. In the summertime, it comes with no oil, just wet, and it chutes fine then also.

To hopefully answer other peoples additional questions, attached is a sequal to the first video with some information not in the first video;

EFM 520 Biofuel Boiler Sequal_0001.wmv
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[nepafile=26514]EFM 520 Biofuel Boiler Sequal_0001.wmv[/nepafile]
Stoker Coal Boiler: EFM 520

Re: EFM Video

PostBy: vermontday On: Sun Mar 20, 2011 10:28 pm

Here are pictures showing the bottom of the bag permanently attached to a skid.

This happens to be the first skid I made, which originally had a small round hole for the bag spout. I emptied the skid completely of coal to rework the bottom into a larger opening like the 4 newer skids. To completely empty it, we simply rolled down the bag like a turtleneck sweater and used a hoe to mound the coal over the discharge hole until the boiler had drawn it all down into the auger box.

I then cut the hole to 16 inch by 16 inch, which is slightly larger than the other 4 skids. I then held it down with 1/2 inch pressure treated plywood cut to 16 inch by 16 inch on the inside and 24 inch by 24 inch on the outside. In the picture you will see chicken wire, I originally laminated chicken wire in to try to prevent auger blockages from big pieces of coal. Then I chickened out on the idea before testing it and removed it. I thought, a. I have never had an auger blockage and b. if the chicken wire got dragged into the auger, I would have an auger blockage. Unfortuneatly, I did not take a picture after I removed it.

The reason the auger box is empty is I wanted to check what the coal looked like in the bottom of the box after a year running. I dug it out with a garden trowel. It was fine.

One picture shows the bag rolled down, the second picture shows the original round discharge, the third shows the new square discharge with the slide gates open, the fourth shows the slide gates closed, as they are when the bag is loaded, moved and stored.
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Bag rolled down to hoe coal to center
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Old original setup
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New 16 inch square hole, slide gates open
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Slide gates closed
Stoker Coal Boiler: EFM 520

Re: EFM Video

PostBy: Rob R. On: Mon Mar 21, 2011 5:39 am

I have only found one piece of oversized coal since I started my EFM. It was about the size of a quarter.

I only have two and a half flights of the auger beyond the tube; I guess four flights works well without grinding the coal?
Rob R.
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: EFM Video

PostBy: EarthWindandFire On: Mon Mar 21, 2011 12:50 pm

This is an outstanding video!

If the coal industry and stove manufacturers were willing to work together, (ie. think co-op) a few "public service videos" along the lines of this video would go along way toward "reintroducing" the public to coal as a reliable and efficient fuel source.
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Other Heating: Oil Furnace and Kerosene Heaters.

Re: EFM Video

PostBy: vermontday On: Mon Mar 21, 2011 8:56 pm


To answer MarkVIII question on the auger flights, I am using the factory supplied auger tubes and auger. If you do a search on EFM auger flights, you will see varying opinions on how many flights should be showing. I didn't see alot of fines in the bottom of the auger box after running it a year, so it does not appear to be a problem.
Stoker Coal Boiler: EFM 520

Re: EFM Video

PostBy: CoalHeat On: Mon Mar 21, 2011 9:17 pm

I enjoyed the videos, very nice job!
EFMs are the best!
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Baseburners & Antiques: Sears Signal Oak 15 & Andes Kitchen Range
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: EFM Video

PostBy: lincolnmania On: Tue Mar 22, 2011 3:49 am

nice video!

i'll have to make some youtube vids of my efm af150 and the issues i'm having with it
Hot Air Coal Stoker Furnace: efm af-150 1982
Hot Air Coal Stoker Stove: alaska kodiak stoker 1986
Hand Fed Coal Stove: warm morning 1980 kenmore