Putting unburned coal back through the boiler

Putting unburned coal back through the boiler

PostBy: Brad'79 On: Mon Jan 24, 2011 9:03 pm

I'm new in the coal burning world. The house I bought came with a EFM520.

I had two tons of buckwheat hard coal delivered and it took me about 1.5 weeks to get the hang of air/tooth settings. I initially thought I made a mistake and should have bought oil instead cause my ash pans were as heavy as a ash pan full of fresh coal. I assumed that because the coal was dropping down red hot that it was spent.

Needless to say I adjusted the air settings a little higher and now I'm very happy I didn't buy oil :D .

Anyhow, I have a lot of unburned coal with little ash mixed in. I rinsed out the coal and dumped it to the side of my bin. Is it OK to mix in a bit of it in with the fresh coal and pass it back through the boiler? I hate to waste all of that coal.

The manual mentions that you need to manually crank the shaft in order to get a good count on the amount teeth per cycle. (or something like that) do you just kill power and put a wrench on the electric motor shaft or do you need to disassemble something?

Thanks!
Brad'79
 
Stove/Furnace Make: EFM
Stove/Furnace Model: DF-520

Re: Putting unburned coal back through the boiler

PostBy: stoker-man On: Mon Jan 24, 2011 11:35 pm

Sure, put the good coal back in the bin.

The fan can be seen through the opening. It rotates in a CCW direction. Cutting power to the stoker motor and having an electrician disconnect the motor's wires from the circuit, will allow you to safely move the fan and count the teeth in one revolution by slight finger pressure on the check pawl.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: Putting unburned coal back through the boiler

PostBy: Brad'79 On: Tue Jan 25, 2011 10:59 pm

Thanks!
Brad'79
 
Stove/Furnace Make: EFM
Stove/Furnace Model: DF-520

Re: Putting unburned coal back through the boiler

PostBy: coal berner On: Sat Feb 05, 2011 7:20 pm

Or you can loosen the cover plate screw /thump screw slide the plate all the way towards the back covering the teeth then slide it back slowly counting the teeth on the way back when running watch figures around drum gear and drive paw
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520