Low draft in aa130

Low draft in aa130

PostBy: franksnbeans On: Tue Apr 15, 2014 5:56 pm

Hey guys,

Having problems with getting a good draft. I have 9 feet of insulated pipe and the top of chimney is about 12 feet over fire. I started with a draft of .015 and kept adding chimney and still there is no change in draft. at $100 every 3 feet of pipe.... Im leery of adding more pieces and still have no difference in draft. What could be my options? Run the timer more? Add more chimney and will I eventually get my draft? Or add an inducer into the system?

I really want to run the boiler through the summer. Right now my timer is set at 2 minutes an hour. This mourning I ran the boiler for 12 minutes just to get any heat out of coal. it wasn't out, but that was just over night. There is no doubt that if I let it run just on the timer it would have gone out. Usually even if I see no red coals and the boiler runs for 4 minutes, that fire is kicking. 12 minutes seems like a long time to regain. So the timer doesn't seem to be keeping up the fire.

Am I just getting worried for nothing? Honestly I don't want any out fires. I think my draft is the huge problem. Just don't know where to go economically.
franksnbeans
 
Stoker Coal Boiler: AA 130
Coal Size/Type: Pea

Re: Low draft in aa130

PostBy: coaledsweat On: Tue Apr 15, 2014 6:16 pm

Axemans don't need a lot of draft as they basically choke when the blower isn't running. I was worried when I first started mine with about the same amount of chimney. Read the draft when the blower is running for a minute or two. You may not always see the fire on an Axeman if it just ate a bunch of fresh coal or has been idle for a while. What is crucial is the fire's height in the tube, if not right, it can be a problem. Check the fire at the end of the timer's run. If you see a good fire, you don't have a problem.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Low draft in aa130

PostBy: franksnbeans On: Tue Apr 15, 2014 6:24 pm

I don't see a fire. And if I poke down in to the coals I don't see any fire. My athrastat is set at 135.At 140 i got a lot of unburnt coal. About two minutes after boiler runs my draft is about .03. Then it goes down to .01.
franksnbeans
 
Stoker Coal Boiler: AA 130
Coal Size/Type: Pea

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Re: Low draft in aa130

PostBy: coaledsweat On: Tue Apr 15, 2014 7:10 pm

How long have you been running this thing, when you started it did you fill the firetube halfway up with ash?
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Low draft in aa130

PostBy: franksnbeans On: Tue Apr 15, 2014 7:16 pm

Been running it about 4 weeks. Just got it. New to the coal burning club. No I didn't put ash in it before starting.
franksnbeans
 
Stoker Coal Boiler: AA 130
Coal Size/Type: Pea

Re: Low draft in aa130

PostBy: coaledsweat On: Tue Apr 15, 2014 7:23 pm

Shut it down and clean it out. Fill the firetube half way with ash and restart. Common newbie mistake with this beast. The fire will break the surface more often than not if the height of it is correct. You will probably get some unburned coal but it really isn't an issue with what you'll be saving. If you don't have a manual, call Axeman and they will send you one.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Low draft in aa130

PostBy: coaledsweat On: Tue Apr 15, 2014 7:29 pm

franksnbeans wrote:My athrastat is set at 135.At 140 i got a lot of unburnt coal.

Do not use the knob to adjust the anthrastat. You need to use an allen wrench in the center of it. The knob is to calibrate the unit only.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Low draft in aa130

PostBy: franksnbeans On: Tue Apr 15, 2014 7:37 pm

Ok I'll try half full of ash. I guess I figured the athrastat would control the ash level. And I do adjust the athrastat with an Allen. Slow and steady I will learn this beast.
franksnbeans
 
Stoker Coal Boiler: AA 130
Coal Size/Type: Pea

Re: Low draft in aa130

PostBy: mozz On: Tue Apr 15, 2014 8:10 pm

If you turned the knob without a allen wrench, it is now out of adjustment. It has to be calibrated now to show the correct number. You need to describe your chimney and where is the boiler located inside? outside? Is the manometer zeroed correctly? Can you set the timer to run set number of minutes each half hour? Coal brand?
mozz
 
Stoker Coal Boiler: Axeman Anderson 1982 AA-130 Steam

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