EMF520 Settings to Produce Steam

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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riverfisher
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Posts: 6
Joined: Mon. Jun. 21, 2010 3:58 pm
Stove/Furnace Make: emf stoker
Stove/Furnace Model: 350

Post Sun. Oct. 03, 2010 8:40 pm

I'm getting ready for winter and was wondering what I should set the feed and air at to produce enough steam for heat.

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Pa Dealer
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Posts: 244
Joined: Fri. Aug. 15, 2008 10:12 am
Stoker Coal Boiler: EFM 520 DF
Coal Size/Type: Rice
Other Heating: Keystoker
Stove/Furnace Make: EFM DF 520
Stove/Furnace Model: Keystoker
Location: NEPA

Post Mon. Oct. 04, 2010 8:31 am

5 teeth 4 1/2 air..........

ry

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Pacowy
Member
Posts: 2741
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 Mon. Oct. 04, 2010 4:55 pm

I haven't run a 520, but based on making steam with a 700 stoker and a 900 boiler, I'd vote for the number of teeth that fills your radiators with steam (without building up a lot of pressure). However, I wouldn't go any higher than the number of teeth for which you can put in enough air to get an efficient burn. I think there are other threads here that tell you what the pot should look like. If you're burning rice that has a lot of undersized pieces, the fire my not "breathe" very well, and you may need a high air setting relative to the feed rate to burn efficiently (and may not be able to burn efficiently at high feed rates). I know EFM no longer recommends burning buck in a 520 (cue for whistlenut on that) but to make steam I'd suggest using at least "big" rice.

Mike

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