Setting up New EFM 520

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.
cardinal
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Stoker Coal Boiler: EFM 520
Coal Size/Type: Rice
Location: CARBON COUNTY,PA.

Post Sat. Sep. 03, 2011 10:36 pm

Just fired up my new 520 , I set it at 4 feed 4 air also 2min per 1/2 hour burn. well it went out early morning Could anyone give me some tips on summer time setting.

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Rob R.
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Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Sat. Sep. 03, 2011 10:42 pm

What are the aquastat settings? How well does the chimney draft?

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CoalHeat
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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
Location: Stillwater, New Jersey

Post Sat. Sep. 03, 2011 10:48 pm

It needs more air then that at 4 teeth feed.
Did you take over fire as well as smoke pipe draft readings? Do you have a barometric damper installed? So many questions need answering here before we can help.
Heating a circa 1832 farmhouse with a Harman Magnafire Mark I & a 1959 EFM 350 (heating DHW).
100% Oil Free!
"It's what we learn after we think we know it all that counts."

cardinal
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Posts: 58
Joined: Sat. Sep. 03, 2011 10:29 pm
Stoker Coal Boiler: EFM 520
Coal Size/Type: Rice
Location: CARBON COUNTY,PA.

Post Sat. Sep. 03, 2011 10:55 pm

barometric damper installed, AQUA SETTING 190HIGH 150 LOW

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Rob R.
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Posts: 11368
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Sat. Sep. 03, 2011 11:03 pm

4 to 4.5 air is fine for 4 teeth on rice. Does the boiler bump the high limit when running on the timer? What do you have for a chimney setup? Ever checked the draft with a gauge?

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coal berner
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Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520
Location: Pottsville PA. Schuylkill County PA. The Hart Of Anthracite Coal Country.

Post Sun. Sep. 04, 2011 12:49 am

Summertime setting 160 Low 200 high 10 diff timer 3 minute once a hr depending on coal 4 minutes ever hr
3 0r 4 teeth feed 3.5 to 4.5 air depending on what coal your burning you might have to increase or decrease air
Once you figure out what the coal likes you can play around with settings Also how your chimney drafts will determine
how low you can go with feed & air settings you may be able to go down 2 teeth feed

Here is a Manual for 520 settings are on last page 24 it is a guide base line to start with once you get use to the operation on your set up you will be able to play around with settings and find out what works for your set up It is not
writing in stone that you have to go with exactly with what it on the chart But is a good start not all Anthracite is the same so not all settings or setups will be the same

http://www.efmheating.com/manuals/DF520-Installation.pdf
J.C.

Heating house & water with a 1986 electric furnace man DF520 using buckwheat Anthracite coal

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CoalHeat
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Posts: 8327
Joined: Sat. Feb. 10, 2007 9:48 pm
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
Location: Stillwater, New Jersey

Post Sun. Sep. 04, 2011 9:05 am

PostBy: Wood'nCoal On: Sat Sep 03, 2011 10:48 pm
It needs more air then that at 4 teeth feed.
I always forget that most people burn rice instead of buck in EFM's. :oops:

Overfire and breech draft needs to be measured with a manometer, air can be adjusted accordingly.
Heating a circa 1832 farmhouse with a Harman Magnafire Mark I & a 1959 EFM 350 (heating DHW).
100% Oil Free!
"It's what we learn after we think we know it all that counts."

cardinal
Member
Posts: 58
Joined: Sat. Sep. 03, 2011 10:29 pm
Stoker Coal Boiler: EFM 520
Coal Size/Type: Rice
Location: CARBON COUNTY,PA.

Post Mon. Sep. 05, 2011 3:02 pm

Thanks for all your help, Just started fire again at 8am (high 200 low 150 diff 10 )(3min per 1/2 hr) 2 teeth 3 air, its 3pm and its still going .
BOILER TEMP AT 153 not useing any hot water. I'm just trying to keep it running with timer.I dId not take any draft readings at all.What kind of gauge do I need ,and where can I get one and should I set up a manometer somewhere . Thanks again This is all new to me Also this is set up im my garage and my chimney is 15 feet high from ground 10 feet high from stove pipe I plan on extending chimney 5 more feet. Do you guys agree or can I leave it at 15 feet high

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Rob R.
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Posts: 11368
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Mon. Sep. 05, 2011 3:27 pm

Add as much height to the chimney as you can afford.

I have had great results with 4 teeth, 4 air, and 2/30 min on the timer. 2 teeth is pretty "light" on the feed...do have problems with the boiler running hot?

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CoalHeat
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Posts: 8327
Joined: Sat. Feb. 10, 2007 9:48 pm
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
Location: Stillwater, New Jersey

Post Mon. Sep. 05, 2011 5:04 pm

Draft readings are critical to the boiler's operation. Read all about manometers:
Manometer Install
Heating a circa 1832 farmhouse with a Harman Magnafire Mark I & a 1959 EFM 350 (heating DHW).
100% Oil Free!
"It's what we learn after we think we know it all that counts."

cardinal
Member
Posts: 58
Joined: Sat. Sep. 03, 2011 10:29 pm
Stoker Coal Boiler: EFM 520
Coal Size/Type: Rice
Location: CARBON COUNTY,PA.

Post Tue. Oct. 04, 2011 1:09 pm

coal berner: what are your winter time settings. Now at 4 teeth 4.5 air 2min per 1/2 hour. manometer settings are (-.02 at fire door) ( - .04 at stack) .Just raised chimney to 16 feet, had to bring in outside air for boiler. I have coal/ oil 520 efm . Dryer was taking air from boiler shutting down oil gun. I want to run all coal . I just started coal fire, hope it stays alive high set at 200 low at 160 (10 diff ) nobody home durning day .I hope it dosen't temp up to 200 shutting down timer this is all knew to me hope I did the right thing, going back to coal like my parents had. Thanks for all your help on here

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Rob R.
Site Moderator
Posts: 11368
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Tue. Oct. 04, 2011 1:51 pm

cardinal wrote:Now at 4 teeth 4.5 air 2min per 1/2 hour. manometer settings are (-.02 at fire door) ( - .04 at stack) .Just raised chimney to 16 feet, had to bring in outside air for boiler.
If the boiler has plenty of make-up air and the chimney continues to draft well, you should have no problems. My only suggestion is to back off the air a little and monitor the burn. It might burn just fine with the air at 4 or 4.25.

cardinal
Member
Posts: 58
Joined: Sat. Sep. 03, 2011 10:29 pm
Stoker Coal Boiler: EFM 520
Coal Size/Type: Rice
Location: CARBON COUNTY,PA.

Post Tue. Oct. 04, 2011 3:37 pm

Thanks I will set it back to 4 air

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Rob R.
Site Moderator
Posts: 11368
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Tue. Oct. 04, 2011 3:55 pm

Running the air at 4.5 won't hurt anything, I was just pointing out that it might be more than you need.

The best way to set the air is to load the boiler and make the stoker run for at least 30 minutes...then look at the fire while the stoker is running. It should have a ring of ashes about 1.5-2" wide around the edge of the pot. How much air you need to achieve this ash ring can vary with the coal characteristics.

I run a little extra air during the summer to minimize unburned coal in the ashes, but the feed/air settings in the EFM manual work good for me during the heating season.

cardinal
Member
Posts: 58
Joined: Sat. Sep. 03, 2011 10:29 pm
Stoker Coal Boiler: EFM 520
Coal Size/Type: Rice
Location: CARBON COUNTY,PA.

Post Tue. Oct. 04, 2011 9:42 pm

I will try that thanks .Do I need to have a black spot of unburned coal in center of pot. I just can't get it at 4 teeth is that ok

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