Do I have a draft problem????

Do I have a draft problem????

PostBy: gitrdonecoal On: Wed Jan 29, 2014 6:57 am

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Thought I had the keystoker 90 figured out, saw a temp of 400 was very happy happy happy like before. Now I'm back down to stove temp of 350 wth?? Before baro temp of 190 ish and after of 290 ish taken with a BBQ thermometer. Baro at .04. Here are some pics
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557

Re: Do I have a draft problem????

PostBy: gitrdonecoal On: Wed Jan 29, 2014 7:03 am

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gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557

Re: Do I have a draft problem????

PostBy: titleist1 On: Wed Jan 29, 2014 9:04 am

Couple thoughts....
Is your flame height at the top of the firebox when it has been firing and feeding coal for about 30 minutes?

Do you have burning coals up to about 1" from the edge of the grate?

Do you have a restrictor plate on the combustion fan intake, how open is it and has it been bumped lately? edit to add....I had to open my plate slightly with the last load of coal i put in the bin, the stove temps had dropped about 50* with the same settings & draft reading.

Your flue temp and stove temp are closer than what I usually see on my set up. What is the mano reading if you cover your baro? The last few days I have been at 690* on the stove and 230* on the stack before the baro.

That duct heading to the back of the stove, is that going to the combustion fan or distribution blower?
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite


Re: Do I have a draft problem????

PostBy: gitrdonecoal On: Wed Jan 29, 2014 10:35 am

titleist1 wrote:Couple thoughts....
Is your flame height at the top of the firebox when it has been firing and feeding coal for about 30 minutes?

Do you have burning coals up to about 1" from the edge of the grate?

Do you have a restrictor plate on the combustion fan intake, how open is it and has it been bumped lately? edit to add....I had to open my plate slightly with the last load of coal i put in the bin, the stove temps had dropped about 50* with the same settings & draft reading.

Your flue temp and stove temp are closer than what I usually see on my set up. What is the mano reading if you cover your baro? The last few days I have been at 690* on the stove and 230* on the stack before the baro.

That duct heading to the back of the stove, is that going to the combustion fan or distribution blower?


It's almost to the top of stove. Coals now about 2 inches from edge. Had it before to 1 inch from edge. Plate is 3/4 to full open. I believe with baro shut it reads .05, I'm at work now but I believe that what it read when I would monkey with things in past. The duct is for distribution blower. Any help would be great.
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557

Re: Do I have a draft problem????

PostBy: titleist1 On: Wed Jan 29, 2014 11:07 am

imo .05 is on the low side with the baro covered in this cold weather running full out.

Have you cleaned the fly ash out of the flue pipe?

I would think running full out you should get higher than 400* although that was read with that magnetic thermometer and they are not too accurate.

Things to check include the fly ash in the flue pipe, air holes in the grates being blocked, ash/fines under grate blocking combustion airflow, combustion fan seated properly in mount, combustion fan fins clean, coal being fed properly providing enough new coal to the grates.

This last item has come up a couple times where fines were blocking the feed mechanism and the new coal wasn't being fed at a high enough rate.
If you get it fixed through one of these things, please post back with the resolution so others can use that in the future.
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Re: Do I have a draft problem????

PostBy: gitrdonecoal On: Wed Jan 29, 2014 5:43 pm

Got home from work and stove is back to 400. An inch of ash at bottom of grate. Perfect. Read stack temps and again they read 200 and 300. Fly ash was minimal, did a good vac clean a month ago, but did it again just in case. Baro is reading .04 or .05. Fly ash is cleaned off baro too, again was minimal. Combustion flap is around 3/4 or a touch more. Flames almost to top. It's all weird. Info on chimney: mansonry with clay flue, has a 6 inch liner that I installed. 16 foot tall. Have folks needed a second baro, or is that taboo? Any help is great
John
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557

Re: Do I have a draft problem????

PostBy: Rigar On: Wed Jan 29, 2014 6:50 pm

... silly question... but where exactly is your manometer located??

... in my opinion a second baro is not going to help your cause
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: Do I have a draft problem????

PostBy: Rigar On: Wed Jan 29, 2014 6:54 pm

... is also difficult to determine from the picture... but is the face of your baro truly plumb...???

... it not only needs to be level side to side... but plumb as well
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: Do I have a draft problem????

PostBy: titleist1 On: Wed Jan 29, 2014 7:28 pm

i agree that with a .04 or .05 reading on the manometer you do not need another baro.

Anyone else with some experience with this stoker have an opinion on that 400* stove temp vs. 300* stack temp? 400* seems low and too close to the stack temp to me.

Just had a thought...is the 400* taken where the distribution air flows through the stove body to the duct? Maybe that is why the number seems low to me? Can you try the gauge on the front of the stove body to the left of the door about hinge high and see what it reads there?
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Re: Do I have a draft problem????

PostBy: gitrdonecoal On: Wed Jan 29, 2014 7:48 pm

The manometer is on the basement wall. About 5 ft high. Yup I know for site the baro is plumb, at least now after I cleaned everything. The temp gage is on the left side of stove, middle about 2/3 up from bottom of stove. If you look close you can just see it in stove pic. Thanks for all the speedy responses
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557

Re: Do I have a draft problem????

PostBy: gitrdonecoal On: Wed Jan 29, 2014 8:26 pm

Just pondering ideas here. I have push bar adjustment screw set all the way in, and flap 3/4 open on combustion air. Should I change this?? Maybe try 2 or 3 turns out and have flap 2/3? Is it possible I'm pushing too much air to create the high draft, and at the same time burning more coal than I need to in a long run?
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557

Re: Do I have a draft problem????

PostBy: Rigar On: Wed Jan 29, 2014 10:03 pm

gitrdonecoal wrote:The manometer is on the basement wall. About 5 ft high. Yup I know for site the baro is plumb, at least now after I cleaned everything. The temp gage is on the left side of stove, middle about 2/3 up from bottom of stove. If you look close you can just see it in stove pic. Thanks for all the speedy responses


...I meant where is the manometer reading draft??
..at breach-BEFORE baro?...just had to ask..
the baro will not "create" or "maintain" a draft....but will only keep it "in check"...
..such that if it is "set" at .04....it will begin to open when that draft is met...allowing room air up the stack instead of pulling air thru the fire...
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: Do I have a draft problem????

PostBy: gitrdonecoal On: Wed Jan 29, 2014 10:08 pm

The tube is after the baro bout 8 inches past it
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557

Re: Do I have a draft problem????

PostBy: Rigar On: Wed Jan 29, 2014 10:20 pm

gitrdonecoal wrote:The tube is after the baro bout 8 inches past it



...ok....it needs to go before it ...(between stove and baro)
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: Do I have a draft problem????

PostBy: gitrdonecoal On: Wed Jan 29, 2014 10:24 pm

I did and reads still about .04 correction .03, glasses were upstairs lol
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557