Too much draft?

Re: Too much draft?

PostBy: mmcoal On: Wed Nov 20, 2013 1:46 pm

Usually below 300 I was tending every 24 hours and above that I do every 12 hours.
mmcoal
 
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: nut

Re: Too much draft?

PostBy: Rob R. On: Wed Nov 20, 2013 1:57 pm

Sounds like your draft fluctuates a lot. My chimney is the same way, can go from barely enough draft to sucking the dust right off the floor.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Too much draft?

PostBy: titleist1 On: Wed Nov 20, 2013 2:02 pm

mmcoal wrote:I am having some trouble getting the stove over 300 now


^^^ are you shaking out the ash enough to let a good amount of air get to the coal bed? shouldn't be any trouble getting that stove over 300*.

sounds like you have an ultra good draft going and it could be that your set up needs a baro in addition to the manual damper. each install and house / stove / chimney / surrounding trees / topography / prevailing winds has its own personality.
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: Too much draft?

PostBy: mmcoal On: Wed Nov 20, 2013 2:12 pm

I usually shake until I can see a uniform glow in the ash pan, but ash build up was my first thought this morning. I think the dial setting is different with the magnet back on. Thank you very much everyone, I guess a baro is probably going to be my best option.
mmcoal
 
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: nut

Re: Too much draft?

PostBy: freetown fred On: Wed Nov 20, 2013 2:55 pm

mm, those dial settings are not carved in stone. If my stove is not running hot enough I turn the dial till I've got a finger width worth of open & check an hour or so later--if she's still not hot enough I do it some more. It will close on it's own. Once she's where I'm comfortable, I LEAVE it there. ( usually for the season until the cuff months) I would be amazed if you REALLY need a baro. I know you've played with a bunch of things, but give that a shot. I've got 2 friends with the 50-93 that tried the baro route & eventually took them off cause they finally got their flap settings figured out & that definitely varies from house to house--Is there something in the manual that tells where it should be set?????????? If so, which I'm hoping NOT, tear that page out & try the hands on method:) I know you're getting real frustrated but there is a simple combination that WILL work. Those people that designed that stove are far from foolish ;) PS--start tending EVERY 12 hrs whether YOU think she needs it or not--I'm thinkin with the tending scenario you mentioned that ash IS probably a BIG contributing factor
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Too much draft?

PostBy: Lightning On: Wed Nov 20, 2013 4:03 pm

mmcoal wrote:I have finally been able to get a reading with the outside temps in the upper 20's and low 30's. For some reason I am having some trouble getting the stove over 300 now and the stack still runs away on me(400+) at times. My mano is reading around -.07 to -.09 with the stove heating back up and the MPD closed. If I open the MPD up I notice the draft go up even further. I know the bi metal damper is suppose to regulate this stove, but I am thinking I will need a baro. I have a feeling if the temps drop more and I crank the stove up more I will be in excess of of -.1 on the manometer.


At what point during the burn did this happen? Shortly after loading? several hours after loading? Is this your first year burning coal? You may just need to get used to the characteristics of the burn cycle. But yeah that draft is too high.
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Too much draft?

PostBy: mmcoal On: Thu Nov 21, 2013 11:28 am

The stack temperature spike usually happens when a fresh load of coal is catching after a shake down and the flap stays open until it's up to temp again. I can understand the spike, but I haven't found any posts that talk about stack temps that high which concerned me. I had the stove running around 350-375 all night and once settled in the stack was staying around 180-225. I also weighed in my coal and right now running at 350+ I seem to be putting about 25lbs in every 12 hour interval. Seems a bit high, no?
And yes this is my first year burning coal so I know there is going to be a learning curve. Even with all the little bugs getting worked out, it sure beats paying that damn oil bill and I can laugh at the neighbors every time that propane truck pulls up to there house this winter :D .
mmcoal
 
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: nut

Re: Too much draft?

PostBy: freetown fred On: Thu Nov 21, 2013 11:47 am

Nope 25 lbs in 12 hrs is what I would expect in colder weather--I'm doing about 3/4 hod, which is probably right around 20-25 lb, every 12 hrs--house is 73 & nice & comfy-- stop worrying about stack temps right after tending--as soon as you shut that hopper door, close your MPD again & let the stove do what she does best:)
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Too much draft?

PostBy: Rob R. On: Mon Nov 25, 2013 7:10 am

mmcoal wrote:The stack temperature spike usually happens when a fresh load of coal is catching after a shake down and the flap stays open until it's up to temp again. I can understand the spike, but I haven't found any posts that talk about stack temps that high which concerned me. I had the stove running around 350-375 all night and once settled in the stack was staying around 180-225. I also weighed in my coal and right now running at 350+ I seem to be putting about 25lbs in every 12 hour interval. Seems a bit high, no?
And yes this is my first year burning coal so I know there is going to be a learning curve. Even with all the little bugs getting worked out, it sure beats paying that damn oil bill and I can laugh at the neighbors every time that propane truck pulls up to there house this winter :D .


It is due to the volatile gasses burning off from the fresh coal.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Too much draft?

PostBy: Lightning On: Mon Nov 25, 2013 7:26 am

mmcoal wrote:For some reason I am having some trouble getting the stove over 300 now and the stack still runs away on me(400+) at times. My mano is reading around -.07 to -.09 with the stove heating back up and the MPD closed.
These stats are a little high but within reason after a new load of coal is catching fire.

mmcoal wrote: I had the stove running around 350-375 all night and once settled in the stack was staying around 180-225. I also weighed in my coal and right now running at 350+ I seem to be putting about 25lbs in every 12 hour interval. Seems a bit high, no?
Everything here looks good partner :D Whats the manometer reading after the stove is settled in with these temps??
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Too much draft?

PostBy: dcrane On: Mon Nov 25, 2013 9:03 am

mmcoal wrote:The stack temperature spike usually happens when a fresh load of coal is catching after a shake down and the flap stays open until it's up to temp again. I can understand the spike, but I haven't found any posts that talk about stack temps that high which concerned me. I had the stove running around 350-375 all night and once settled in the stack was staying around 180-225. I also weighed in my coal and right now running at 350+ I seem to be putting about 25lbs in every 12 hour interval. Seems a bit high, no?
And yes this is my first year burning coal so I know there is going to be a learning curve. Even with all the little bugs getting worked out, it sure beats paying that damn oil bill and I can laugh at the neighbors every time that propane truck pulls up to there house this winter :D .


I burn 25 lbs every 12 hours almost to a "T" in the winter months and I keep the stove top temp around 600 (I know im pushing her, but I have 2000sq'). Im not sure the house or position of stove but 350 seems a low temp for winter months (is that reading off the stove top?)

Do what lightning asks in his last post... whats your draft after she's settled in? (it sure sounds like you have one heck of a good draft...to good!).... Im thinking Baro here.
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: Too much draft?

PostBy: mmcoal On: Mon Nov 25, 2013 11:09 am

My draft after the stove settles in can vary quite a bit, most of the time it is between -.03 -.05 and sometimes it can be pulling -.06 to -.07. I am starting to realize the weather is playing a big part in my fluctuations. I ran the stove around 400-450 yesterday and last night and with the temps in the teens and gusty winds I was pulling well over -.1 right after a shake down which brought my stack up to 500 at one point. In the teens and 20's with the stove around 400 I am averaging about 250-300 on the stack. The MPD helps a tad, but I really think I might need a baro next season. Good thing is my coal consumption doesn't seem out of line at least. One thing I have learned so far is to open my MPD before a shake down and hopper reload no matter how good the draft seems or else I get one nice fireball out the hopper door when opened.
mmcoal
 
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: nut

Re: Too much draft?

PostBy: freetown fred On: Mon Nov 25, 2013 12:29 pm

Yeah buddy on that openin the MPD ;)
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Too much draft?

PostBy: dcrane On: Mon Nov 25, 2013 1:35 pm

mmcoal wrote:My draft after the stove settles in can vary quite a bit, most of the time it is between -.03 -.05 and sometimes it can be pulling -.06 to -.07. I am starting to realize the weather is playing a big part in my fluctuations. I ran the stove around 400-450 yesterday and last night and with the temps in the teens and gusty winds I was pulling well over -.1 right after a shake down which brought my stack up to 500 at one point. In the teens and 20's with the stove around 400 I am averaging about 250-300 on the stack. The MPD helps a tad, but I really think I might need a baro next season. Good thing is my coal consumption doesn't seem out of line at least. One thing I have learned so far is to open my MPD before a shake down and hopper reload no matter how good the draft seems or else I get one nice fireball out the hopper door when opened.


Baro! you need a Baro 100%! Fred's draft does not suck the door off its hinges on a cold windy day yet become so nice on a clam, balmy day ...so he does not realize the gravity of the situation toothy
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: Too much draft?

PostBy: freetown fred On: Mon Nov 25, 2013 1:45 pm

No it doesn't, because the one morning it did, motivated me to install the MPD & have had no problems since ;)
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix