Damaged My Harman 1500A (Warped Shaker Grates)

A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat. They can be used as primary heat, supplementary heat or have a dual set up with your existing oil/gas furnace.
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70marlin
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Posts: 27
Joined: Wed. Dec. 23, 2009 2:06 pm
Stove/Furnace Make: Harman
Stove/Furnace Model: SF 1500A
Location: Grass lk. mi

Post Wed. Feb. 15, 2012 12:29 pm

I think I may need some help on setting up my furnace. Burnt none stop for two weeks. Shut down furnace for a good cleaning and noticed that my shaker grates were warped? (Kind of sagged) think I was running a little too much air. Bottom ash chamber door air control is set at half a hole. (Door has twin holes) Burn chamber air control at 1/2 turn out. (The door has twin air controls.) Any help would be appreciated!

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LsFarm
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Joined: Sun. Nov. 20, 2005 8:02 pm
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland
Location: Michigan

Post Thu. Feb. 16, 2012 12:30 am

What causes grates to sag is haveing the ash pan full, and touching the bottom of the grates.
The grates are cooled by the incoming combustion air, if this air is blocked by too much ash, the grates overheat.

Greg L
Burning Pea/Buckwheat through an antique stoker [semi retired SSboiler],
Running an Axeman-Anderson 260M boiler burning Pea, About 150-250#per day
Farming, Fixing, Fabricating and Flying: 'spare time' what's that?

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freetown fred
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Joined: Thu. Dec. 31, 2009 12:33 pm
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut
Location: Freetown,NY 13803

Post Thu. Feb. 16, 2012 7:49 am

If you can still shake it down, I'd let it go till spring. It's only as complicated as we make it. NOTE Ls's post above. ;)
"A people that values it's privileges above it's principals, soon loses both"--Dwight D Eisenhower


70marlin
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Posts: 27
Joined: Wed. Dec. 23, 2009 2:06 pm
Stove/Furnace Make: Harman
Stove/Furnace Model: SF 1500A
Location: Grass lk. mi

Post Thu. Feb. 16, 2012 10:11 am

Guilty as charged, The Harman has a large ash pan and I tend to get lazy and let it get over full of ash. I’ll give it a try to see if I can keep coal from falling through the shaker grates one grate warped real bad, but spring isn’t all that far away. Thank you for such a quick answer.

jrn8265
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Joined: Tue. Jul. 22, 2008 11:52 am
Stove/Furnace Make: Keystoker Koker
Stove/Furnace Model: Koker 160
Location: Near Coal Country, PA

Post Tue. Feb. 21, 2012 12:53 pm

Greg L, awesome point here and I never thought about this!

Does a full ash pan effect a koker the same way? Possible warped grates?

Thank you!

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freetown fred
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Posts: 21408
Joined: Thu. Dec. 31, 2009 12:33 pm
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut
Location: Freetown,NY 13803

Post Tue. Feb. 21, 2012 6:37 pm

Any stove.
"A people that values it's privileges above it's principals, soon loses both"--Dwight D Eisenhower


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Lightning
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Joined: Wed. Nov. 16, 2011 9:51 am
Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Anthracite/Awesome Size
Location: Olean, NY

Post Fri. Feb. 24, 2012 3:50 am

As naughty as it sounds, I dump every time I shake it.... :lol:

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TractorDre
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Posts: 8
Joined: Sun. Mar. 04, 2012 9:28 pm
Hand Fed Coal Stove: Efel Ambassador and Montana//Harman Mark 1
Baseburners & Antiques: Atlantic Kitchen stove #40
Coal Size/Type: Pea
Other Heating: oil
Location: Manchester,NH
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Post Mon. Mar. 05, 2012 6:21 pm

Lightning wrote:As naughty as it sounds, I dump every time I shake it.... :lol:
TMI.

:lol:
You don't need a weed killer, if you have a Backhoe.

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TractorDre
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Posts: 8
Joined: Sun. Mar. 04, 2012 9:28 pm
Hand Fed Coal Stove: Efel Ambassador and Montana//Harman Mark 1
Baseburners & Antiques: Atlantic Kitchen stove #40
Coal Size/Type: Pea
Other Heating: oil
Location: Manchester,NH
Contact:

Post Mon. Mar. 05, 2012 6:26 pm

When I first got the Harman. I was using pea coal and found out how much the grates opened up.

Yep. It emptied into the ash pan an jammed everything up. Had to closed the intake and dig it out from the top after it choked itself out.

Every stove is different. It' always a learning curve for everyone of them.
You don't need a weed killer, if you have a Backhoe.

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