Draft

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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northernmainecoal
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Posts: 502
Joined: Wed. Jan. 22, 2014 8:33 am
Stoker Coal Boiler: EFM 520
Hand Fed Coal Stove: Hitzer 30-95
Baseburners & Antiques: Herald Baseheater #6
Coal Size/Type: Rice/Nut/Stove
Location: Aroostook County, Maine

Post Tue. Mar. 04, 2014 7:43 am

Hello all
I installed a new EFM and lit my first fire in it on Jan. 21, since that time I haven't had any issues and am totally in love with the thing. After spending some time reading here I decided I'd like to get a bit more technical about running the stove and monitoring the draft. Last week I installed a manometer about 10 inches from the back of the stove and before the baro. It consistently reads .05, right where it should as I understand. Last night I checked the draft over the fire during a burn. It wasn't what I expected, but I could just be misinformed. The draft shot up to .2 and then I had to abandon my mission and tend to a fussing baby. I expected to see something less than the .05 at the back of the stove.
So is what I'm seeing correct and I was expecting the wrong thing, or is something going on?
Feed is 4 teeth air is 4.5 or a tish more

Rob
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Rob

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Rob R.
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Posts: 11363
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. Mar. 04, 2014 7:56 am

Did you use the same manometer to check the draft in each location? Was it windy outside?

It is not normal to observe such a strong draft over the fire...my only guess is a strong wind gust gave you a very strong draft for a few seconds.

I normally observe -0.05 at the flue outlet and -0.02 to -0.03 at the fire door under full burn.

User avatar
northernmainecoal
Member
Posts: 502
Joined: Wed. Jan. 22, 2014 8:33 am
Stoker Coal Boiler: EFM 520
Hand Fed Coal Stove: Hitzer 30-95
Baseburners & Antiques: Herald Baseheater #6
Coal Size/Type: Rice/Nut/Stove
Location: Aroostook County, Maine

Post Tue. Mar. 04, 2014 8:00 am

I used the same manometer, just a longer tube to reach around to the front. It was a bit windy but nothing notable. I will run out at lunch time when there are no kids around and see what I get for a reading
Rob

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User avatar
northernmainecoal
Member
Posts: 502
Joined: Wed. Jan. 22, 2014 8:33 am
Stoker Coal Boiler: EFM 520
Hand Fed Coal Stove: Hitzer 30-95
Baseburners & Antiques: Herald Baseheater #6
Coal Size/Type: Rice/Nut/Stove
Location: Aroostook County, Maine

Post Tue. Mar. 04, 2014 12:49 pm

I'm not sure what happened yesterday but today I got what I was expecting, .05 at the flue and .02 to .03 over the fire. :D
As far as I can tell everything is as it should be...I just wished I bought this thing years ago!

I've figured I have burned on average 72 lbs of coal per day starting Jan. 21. I bought the unit new. Would you recommend shutting down and cleaning this spring or should I be able to make it to fall/end of summer before really needing to clean. I plan on using it all summer for DHW.
Anything else to look for?
Rob

User avatar
Rob R.
Site Moderator
Posts: 11363
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. Mar. 04, 2014 1:04 pm

I would shut it down and clean it in the spring. Let the boiler come down to room temperature and check the piping for leaks. If you haven't already, insulate the boiler piping. EFM's recommended settings of 160/200, 4 teeth 4 air, and 2 minutes every half hour has worked well for me in the past for summer operation. If your coal is on the small side you might need to run the air a little higher, as you are now.

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