rotating backward

Re: rotating backward

PostBy: Rob R. On: Mon Dec 30, 2013 10:36 pm

Normy wrote:Thanks, so I changed it to the 40º spread as recommended. Also lowered the air to 4.5 with a 5 click as the recommend.


They really run nice on 5 clicks. Double check the ash ring the next time it runs hard coming out of setback...but it should be pretty close.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: rotating backward

PostBy: Normy On: Sun Jan 05, 2014 1:03 pm

Rob R. wrote:
Normy wrote:Thanks, so I changed it to the 40º spread as recommended. Also lowered the air to 4.5 with a 5 click as the recommend.


They really run nice on 5 clicks. Double check the ash ring the next time it runs hard coming out of setback...but it should be pretty close.


We just experienced a couple days of sub-zero temps, the 520 just seems to run so much better when it's cold outside.

With now that the fan is running in the correct direction, there seems to be no need to raise the clicks over 5. The air I reduced to 4.5 as recommended in the EFM manual ( as a starting point), but I found that the amount of unburned coal appeared a bit more. So I raised the air up to 5.25 and reduced it quite a bit, (about the best I ever seen!).

Everything seems to be dialed in very nicely at the moment. So far so good.
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: Rob R. On: Sun Jan 05, 2014 1:26 pm

The ash ring is the most critical, I wouldn't worry about a few pieces of black kn the ash. Trying to eliminate them usually sends more heat up the stack than you save from the ash.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: rotating backward

PostBy: Normy On: Mon Jan 06, 2014 11:54 pm

Rob R. wrote:The ash ring is the most critical, I wouldn't worry about a few pieces of black kn the ash. Trying to eliminate them usually sends more heat up the stack than you save from the ash.


Yes I agree as what I understand. The stack draft & over the fire draft are within the "acceptable ranges", st - .04 & ofd - .015. The ash ring is about 1.5 or 1.75 wide there about under full demand.

I think the decrease in unburned can be largely contributed to the air flow direction corrected. Also noticeable since correction is the center dark spot, reduced ash ring diameter to 1 to 2 inches, also much less clicker clumping in ash ring and ash bin. Of course this is coal from a different vendor, so I can't say if this is a factor.
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520