Harman rumbling, jumping flame

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dradam1

Member
Hearth Supporter
Dec 23, 2010
49
Eastern PA, Bucks Cty
I recently installed a Harman Accentra 52I insert and removed a Jotul wood stove. I'm having issues with my flame jumping, rumbling furiously. Not constantly however. I installed it using my existing 6" stainless flue, thru masonary chimney (about 25 ft) and offset box due to a stone face on fireplace. I was told by my dealer that this was fine. Always had good draw on the Jotul.

My setting are feed rate of just under 4, room temp 2/3, 4- 4.5 temp.

I have an old 200+ year old stone house so it is not very tight. I can feel it drawing air under doors and around windows.

It seems like maybe it's starving for intake air (no OAK installed, told not needed) or the 6" exhaust is drawing out too quickly (if that is possible??) I've burned about a ton of pellets and have not cleaned the exhaust as yet. I do clean the blowers, firebox, etc. every 5 bags.

Any help would be appreciated. I enjoy reading everyones posts.
 
When our PS50 does the rumbling it means there are too many pellets being fed. That would account for your flame jumping as well. Maybe Harmans are different; just tossing out an idea.
 
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My harman does that alot. Mainly when it is windy outside tho. Sounds like a sub woofer . It will not be a problem maybe a little annoying. Mine is also into a chimney . You are getting a good draw :) enjoy !
 
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Since I turned the feed rate down rarely happens this season.
 
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Thanks for feedback. I will turn down my feed rate tonight.
 
Thanks for feedback. I will turn down my feed rate tonight.
Its worth a try. I know it happened usually when trying to catchup and feeding hard. I can turn up the feed and temp and it will roar.
 
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Thanks for feedback. I will turn down my feed rate tonight.
Is your 6" existing liner capped, have a rain lid and multi directional screen/outlet. I think you are getting great draw but fluxuating according to wind direction and gusts. Topping the stack helps even up the draw and downdrafts that can happen with larger flue sizes.
 
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My install is an up 3' and out 2' through the sidewall with an oak (Selkirk DT) and I still had it. So I don't think I had excessive draw and I don't think the wind changed anything due to the oak on the same exposure.
 
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the liner is not capped. The chimney has a large flag stone on top of brick soldiers, for rain protection. I will look into the multi directional outlet in spring. I will adjust the feed speed for now. ......Thanks!
 
Thanks for feedback. I will turn down my feed rate tonight.
The feed rate has nothing to do with the issue you are having....turning it down from your current setting will limit the stove's performance, especially when the cold returns to the northeast next week. But do as you wish....
 
The feed rate has nothing to do with the issue you are having....turning it down from your current setting will limit the stove's performance, especially when the cold returns to the northeast next week. But do as you wish....
I agree, that stove will run fine well over a feed rate of 4 and the house warmer quicker so the stove can downramp sooner than at a feed rate of 3. The stove needs what it needs for feed in order to do it's job. I'd be real surprised if the stove is over feeding itself. I seriously doubt that.
 
Well I removed it, cleaned the exhaust etc as well as the inside. Turned the feed speed down and it's a little better or maybe it's my wishful thinking. I did tighten my jack bolts as they had come loose. At least it's a little quieter.

I did not check my hi- lo drafts when I installed, as the dealer said it would not be necessary. Is that something I should look into doing to correct my issues and how is it done??
 
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