Keystoker KA-6 Burner Grates

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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Carbon12
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Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace
Location: Harrisburg, PA

Post Mon. Sep. 16, 2013 10:23 pm

Hi all. Do I need to slap furnace cement/hight temp silicone sealant at the top of the burner grates after reinstalling them or just slide them back in? Thanks!
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gaw
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Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice from Schuylkill County
Location: Parts Unknown

Post Mon. Sep. 16, 2013 10:34 pm

Absolutely. Use furnace cement. It comes in a tub and has the consistency of cake icing. Smear the edges above the holes and the tops with a good amount. Clean the excess from the top surfaces after they are in place.

Any air leaks above the perforated part of the grates will guarantee a hopper fire. You don’t want that.
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2001Sierra
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Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
Coal Size/Type: Rice
Other Heating: Buderus Oil Boiler 3115-34
Stove/Furnace Model: Keystoker 90 Chimney Vent
Location: Wynantskill NY, 10 miles from Albany

Post Mon. Sep. 16, 2013 10:39 pm

On my Keystoker 90 with the flatplate burner design I used furnace cement around the entire perimeter as well as the seam where my 2 plates meet.

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whistlenut
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Stoker Coal Boiler: AA130's,260's, AHS130&260's,EFM900,GJ & V-Wert
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Post Mon. Sep. 16, 2013 11:26 pm

Don't forget to add some furnace cement under the grates at the top side, also. An air tight seal down to the openings in the grate is essential.
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Wiz
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Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Tue. Sep. 17, 2013 5:06 am

Another question on grates. How often should they be re-cemented if there's no issue with them?
Randy
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gaw
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Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice from Schuylkill County
Location: Parts Unknown

Post Tue. Sep. 17, 2013 9:38 pm

Wiz wrote:Another question on grates. How often should they be re-cemented if there's no issue with them?
They would only need to be re-cemented if they are removed or replaced. They only need to be replaced if they warp or crack. Keep the fines cleaned up under the grates at least once a year and you probably won’t ever have an issue. The bulk of the sealant is between the grates and along the top there is a ledge and lip that need sealed. If you ever need to take them apart the cement will be obvious and you just apply cement to those same areas. Thoroughly remove any old cement first. Any cement that squeezes up from between the grates can be wiped off with a damp cloth before it cures. Any lumps or bumps on the top of the grates would impede the coal flow down the grates.

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Some people make the world happen;
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Most wonder what happened.
Its your choice, Which group you want to belong to….

If a man is a fool, you don't train him out of being a fool by sending him to university. You merely turn him into a trained fool, ten times more dangerous.
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Wiz
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Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Wed. Sep. 18, 2013 5:00 am

Thanks gaw. Just making sure before being in the middle of heating season to find out it needed to be a routine maintenance.
Randy
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Carbon12
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Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace
Location: Harrisburg, PA

Post Wed. Sep. 18, 2013 6:48 pm

Thanks all! All cemented up and installed. Now to finish the piping and wiring!
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