520 Firing Rate...

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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kzad
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Posts: 22
Joined: Sun. Feb. 17, 2008 6:56 pm
Stove/Furnace Make: Harman Mk III
Location: Killingly, CT

Post Wed. May. 21, 2008 8:03 pm

I have a question regarding the firing rate on the 520...the efm site lists firing rate as 2 1/2 to 25 lbs. of coal per hour...is that correct? 60lbs. a day seems like a lot in the spring/fall shoulder seasons, or just making domestic hot water.....

kzad
Member
Posts: 22
Joined: Sun. Feb. 17, 2008 6:56 pm
Stove/Furnace Make: Harman Mk III
Location: Killingly, CT

Post Wed. May. 21, 2008 9:07 pm

Ahhh, thats where the timer comes in Right?

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Scottscoaled
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Posts: 2597
Joined: Tue. Jan. 08, 2008 9:51 pm
Stoker Coal Boiler: EFM 520, 700, Van Wert 800 GJ 61,53
Baseburners & Antiques: Magic Stewart 16, times 2!
Coal Size/Type: Lots of buck
Other Heating: Slant Fin electric boiler backup
Location: Malta N.Y.

Post Wed. May. 21, 2008 9:53 pm

Yes that's 2 1/2 lbs running nonstop or 25lbs running nonstop. Per hour. During a call for heat until the call is satisfied. Then the timer runs unit for 3 minutes per 1/2 hour or 3 minutes per 1 hour. Your standby rate can range from 6 lbs per day to 60 lbs per day at ten teeth. :) Scott
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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e.alleg
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Posts: 1285
Joined: Fri. Feb. 16, 2007 10:31 am
Stove/Furnace Make: EFM
Stove/Furnace Model: 520
Location: western ny

Post Sun. May. 25, 2008 12:26 am

It will actually be a bit more than that on standby, remember any domestic hot water will pull the boiler temp down and so will standby heat loss anytime the outside air is less than the boiler water. Overall it won't use much in the summer, mine uses 15-20 pounds a day heating all my water and the heat comes on at night sometimes. I could get it tuned to use less in the summer but it takes a lot of fine tuning to save what amounts to little and then having to reset it during the fall and then again in the winter vs doing nothing and buying an extra 1/2 ton of coal for the year.
Burning coal is definitely worth the extra work involved.
"Good enough" is not good enough.

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