Sensing an Outfire When Circulating Between Two Boilers

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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stoker-man
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Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Wed. Oct. 08, 2008 4:09 pm

My buddy and I were brainstorming about how to sense an outfire when the 520 stoker boiler is used to circulate to another boiler. In this particular case, the gas boiler would automatically come on and take over when the stoker had an outfire. The problem was that if the gas boiler was making hot water and circulating through the coal boiler during an outfire, an L6006 wouldn't sense the outfire because the water in the pipes would remain hot at the stoker.

So, we're going to experiment with an L6006C, strapped onto the burner pipe, either inside the base or just outside the base, wherever it could sense a drop in temperature, and not be damaged by excessive heat. In my own case, with a Modine heater, I used an L6006A, with the bulb, and taped the bulb directly to the pipe and insulated around it. I'll report back once we try it.

I wonder if this same set-up wouldn't also work with the AF-150 stoker furnace.
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daluds
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Posts: 282
Joined: Fri. Jun. 20, 2008 9:27 am
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Post Wed. Oct. 08, 2008 4:41 pm

Stoker-man,

Do you have the model number for the timer?

Thanks!

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billw
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Posts: 1087
Joined: Mon. Apr. 24, 2006 5:40 pm
Stove/Furnace Make: EFM 520
Stove/Furnace Model: GOODBYE OIL COMPANY
Location: Dallas, PA

Post Wed. Oct. 08, 2008 4:51 pm

I hope you guys come up with a solution. I'll add it to my system. I hate to have to sift coal out of the ash pan. Yeah, I'm that cheap. Actually I'm trying to find a use for the fines that blow out of the system everyday. I hate throwing something useful away.

Visit Alternate Heating Sytems

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kevin12973
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Posts: 93
Joined: Tue. Jun. 24, 2008 5:10 pm
Stove/Furnace Make: EFM
Stove/Furnace Model: 1956 SF-520 hot water
Location: albany NY

Post Wed. Oct. 08, 2008 5:56 pm

bad boy, stoker scot. Use your own name to write dangerous comments.
Last edited by kevin12973 on Thu. Oct. 09, 2008 7:32 pm, edited 1 time in total.

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stoker-man
Verified Business Rep.
Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Wed. Oct. 08, 2008 7:28 pm

What timer?
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