Buckwheat or rice for a Kaa-2?

Buckwheat or rice for a Kaa-2?

PostBy: efo141 On: Tue Jun 24, 2008 8:58 pm

Can i hear from Kaa2 owners on what is the best size coal to burn. I need to order a bulk load soon Thanks Ed
efo141
 
Stove/Furnace Make: New Yorker/Keystoker
Stove/Furnace Model: WC90-----/Kaa-2

Re: Buckwheat or rice for a Kaa-2?

PostBy: Flyer5 On: Tue Jun 24, 2008 9:50 pm

Keystoker recommends rice . I would stick with that . Dave
Flyer5
 
Stoker Coal Boiler: Leisure Line WL110
Hot Air Coal Stoker Stove: Leisure Line Pioneer

Re: Buckwheat or rice for a Kaa-2?

PostBy: efo141 On: Wed Jun 25, 2008 3:12 am

Keystokers ad says buckwheat or rice coal
efo141
 
Stove/Furnace Make: New Yorker/Keystoker
Stove/Furnace Model: WC90-----/Kaa-2

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Re: Buckwheat or rice for a Kaa-2?

PostBy: europachris On: Wed Jun 25, 2008 7:59 am

The KAA-2 uses basically the stove stoker mechanism, and I do not think it is really designed for buck. I tried buck in my stove and ended up with a hopper fire. That may have been due to the fact that it is a direct vent unit, and Keystoker does NOT recommend buck in a direct vent stove.

The buck did burn just fine, but the larger pieces allow the draft, especialy if it is too high, to pull air down through the hopper, and the fire just follows the air (and coal) right up the grate and into the hopper. It won't burn your house down, but it sure makes a mess of things.

I can only guess but I'd believe the buck would work better in the larger Keystokers with the "classic" Keystoker stoker design (the KA-6 and larger units).

chris
europachris
 
Stove/Furnace Make: EFM 350/Iron Fireman
Stove/Furnace Model: Custom bituminous burner

Re: Buckwheat or rice for a Kaa-2?

PostBy: efo141 On: Wed Jun 25, 2008 5:43 pm

Thanks for the info. I will get the rice
efo141
 
Stove/Furnace Make: New Yorker/Keystoker
Stove/Furnace Model: WC90-----/Kaa-2

Re: Buckwheat or rice for a Kaa-2?

PostBy: Wolverine On: Wed Jul 09, 2008 9:01 am

Would It be a good idea to put a cover on a coal hopper to reduce the chances of air being drawn thru a hopper on direct vent stoves or boilers? :shock: To prevent the possibility of hopper fire. Would this change the dynamics of the combustion blower?
Wolverine
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KAA2

Re: Buckwheat or rice for a Kaa-2?

PostBy: Matthaus On: Wed Jul 09, 2008 9:33 am

Wolverine wrote:Would It be a good idea to put a cover on a coal hopper to reduce the chances of air being drawn thru a hopper on direct vent stoves or boilers? :shock: To prevent the possibility of hopper fire. Would this change the dynamics of the combustion blower?


Discalimer: The following is my opinion and in no way should be considered to contradict any manufacturer's manual or advice on how to operate their particular unit.
:)
A hopper fire is actually caused by combustion gases being expelled through the hopper (this moves the fire back on the grate and heats up the coal in the hopper while providing a path for the flames to travel into the hopper), not the other way around. Covering a hopper only provides an early warning of an issue that is not related to whether it's being filled with combustion gases (which is usually the first thing that happens before a hopper fire). The benefit of a lid is that those gases will condense and show you a problem. The root cause of a hopper fire is a firebox that is at too high a pressure (and actually insufficient draft can be the root cause of that). The pressure inside the stove/furnace/boiler should be negative, most manuals state it should be around -.02" WC or so. If you cannot verify that negative pressure you are operating blind and will not have any indication if the conditions are present to have a hopper fire. As I said installing a lid at least gives that indication by the presence of moisture. If you want to prevent a hopper fire, check your over fire pressure and adjust the inlet plate on your combustion fan so that you don't overpressurize your unit. Also of course you need to verify proper draft on a constant basis to prevent hopper fires.
Matthaus
 
Stoker Coal Boiler: Leisure Line WL110 Dual Fuel, natural gas
Hot Air Coal Stoker Stove: Leisure Line Lil' Heater (rental house)
Coal Size/Type: Rice and Buckwheat Anthracite

Re: Buckwheat or rice for a Kaa-2?

PostBy: Freddy On: Wed Jul 09, 2008 11:09 am

I see the AHS comes with a heat sensor on the coal inlet tube. If there's a fire in there it senses the heat and shuts off the boiler. Might something like that be adapted to any coal stoker? Would it help if fire started up the feed tube?
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

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