Instant Puffback Conditions After Morning Shake

Instant Puffback Conditions After Morning Shake

PostBy: Kielanders On: Wed Mar 21, 2012 7:24 am

Hi All,

We've been burning 24/7 for about 7 months now, our only source of heat, been going very well, thanks to all on this forum for help getting us this far, it's been invaluable.

Question:

In our TLC 2000, a recent phenomena has occured the past two days, after the morning shake prior to reloading - almost instant puffback conditions are created (churning smoke, etc) from the residual coal left over from the evening before. This has actually resulted in modest puffbacks on both days. We damper overnight the same, we do the morning shake the same as we have for months, nothing in our routine has changed. I have a suspicion that I need to sweep the chimney (6" SS Liner & Stove Pipe, 24' Run). The evening outside temps are averaging around 15-20F.

Thoughts?

Thanks
Kielanders
 
Stove/Furnace Make: Harman & Warm Morning
Stove/Furnace Model: TLC-2000, SF-250, WM843

Re: Instant Puffback Conditions After Morning Shake

PostBy: Rob R. On: Wed Mar 21, 2012 9:21 am

Have you checked the pipe between the stove and the chimney for flyash buildup?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: Instant Puffback Conditions After Morning Shake

PostBy: lsayre On: Wed Mar 21, 2012 1:05 pm

Do you have a manometer to monitor your draft?
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Stockton Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)

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Re: Instant Puffback Conditions After Morning Shake

PostBy: Kielanders On: Wed Mar 21, 2012 1:34 pm

lsayre wrote:Do you have a manometer to monitor your draft?


No, we don't. Meant to order one last fall, then burning was going so well, I let it slip off the list.
Kielanders
 
Stove/Furnace Make: Harman & Warm Morning
Stove/Furnace Model: TLC-2000, SF-250, WM843

Re: Instant Puffback Conditions After Morning Shake

PostBy: carlherrnstein On: Wed Mar 21, 2012 2:46 pm

I see your in Alaska I guess your burning bituminous up there. My setup burns bituminous and needs swept at least halfway through the heating season.
carlherrnstein
 
Hot Air Coal Stoker Stove: combustioneer model 77B
Coal Size/Type: pea stoker/Ohio bituminous

Re: Instant Puffback Conditions After Morning Shake

PostBy: Berlin On: Wed Mar 21, 2012 8:08 pm

with a 6" pipe you probably need to sweep it.
Berlin
 
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal

Re: Instant Puffback Conditions After Morning Shake

PostBy: Kielanders On: Thu Mar 22, 2012 12:37 pm

Thanks guys. I just wanted to make sure I wasn't missing something. We've probably run about 6 tons through the TLC alone this season, another 3 tons through the SF in the basement (seperate flue). It's been a really bad winter this year, hopefully we get off the hook next year. I'll do a sweep on Saturday on the TLC side.
Kielanders
 
Stove/Furnace Make: Harman & Warm Morning
Stove/Furnace Model: TLC-2000, SF-250, WM843

Re: Instant Puffback Conditions After Morning Shake

PostBy: Kielanders On: Sat Mar 24, 2012 2:53 pm

Update:

The cleaning is done. The chimney didn't seem that bad, except for the build-up in the liner tee where the chimney liner transitions 90 degrees to the stove pipe coming into the house.

The tee had a build-up/pile restricting the flow of the 6" pipe to about 4".

The stove pipe had an even build-up of about 3/4" of fly ash lining the pipe.

I'm assuming I should probably sweep once mid-season, or when the ash build-up exceeds 1/2" - unless anyone has other recommendations.

Thanks everyone.
Kielanders
 
Stove/Furnace Make: Harman & Warm Morning
Stove/Furnace Model: TLC-2000, SF-250, WM843

Re: Instant Puffback Conditions After Morning Shake

PostBy: CapeCoaler On: Sat Mar 24, 2012 5:51 pm

Sweep Early...
Sweep Often...

Better to sweep too often and have clean pipes...
Than to never sweep again...
Because an ash avalanche blocked the tee...
Pushing CO into the home...
CapeCoaler
 
Stoker Coal Boiler: want AA130
Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
Coal Size/Type: Pea/Nut/Stove

Re: Instant Puffback Conditions After Morning Shake

PostBy: LsFarm On: Sun Mar 25, 2012 3:34 pm

Has the weather warmed up ? Or the prevailing wind change?? sounds like the reduced draft wasn't from the chimney being clogged with ash. Did you check the cap on the chimney if you have one?? sometimes they get clogged with ash on a screen if it has one.

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

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