harman accentra insert ?

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jlongo1115

Member
Dec 15, 2011
39
Wilton,CT
Hey guys thanks for a great forum you have here it has helped me out more then once :). I have a few questions that I am hoping one of you guys can help me with. I am not getting the heat out of my stove that I should be getting and I am not sure why. Sometimes I get so much heat that I can't even stand in front of the stove or I will get burned and then over times it is barely warm. I am burning hamer hot ones so I know it isn't the pellets. I recently purchased a new room sensor and have not had much luck with it . It seems like it just doesn't put out the same heat as when it is in stove temp. One thing I have noticed is that my distribution fan doesn't get any louder once it hits about 40% of the way up. Once it hits high from half way to high it doesn't do anything else at all is this normal? could I have a bad gasket somewhere? I know that it is clean as I just recently removed all of the front parts(burn pot,guide,heat exchangers,ect.... ) and cleaned them thoroughly and also scrubbed the exhaust ports behind the heat exchangers. The left exhaust port was plugged solid from the guy who owned the stove before me so I cleaned everything and what a difference that made. So I continued learning about the stove and learned that the distribution fan was very important to clean also so I decided to take a look and holy COW it was plugged up with what looked like a small poodle so i removed both fans and cleaned them thoroughly with a vacuum and compressed air. I cleaned out the fines from the box next to the main exhaust and also the esp box which was full of about 8 inches of thick ash. One thing I noticed is that my esp is bent downward would this cause any problems? I heard from a installer that it either works or it doesn't and as long as it works it doesn't matter if it is bent is this true? Could I have a bad gasket? I checked the front gasket and it seems to be fine, it looks good and makes a solid connection when shut. What about the distribution blower gasket? is there a gasket on the combustion blower? I just learned that the holes in the burn pot where the flame guide lines up are for air inlets? what if they are clogged would that cause a problem? can a blower start to go bad and just not work as well as it should or is that like the esp because the same installer told me that it also either works or it doesn't. Is there any switch or pentameter that could be bad on the fan adjuster that won't let it go into high ? I also noticed that the air is hottest from the center of the stove to the right of the stove(looking at it) and the left air blowing out is not as hot what could cause this? I am sorry for a million questions here but I am just trying to give you the full details so you can get the best idea of what I am dealing with.
thanks for all your help guys I really appreciate it.
 
the ESP probe should be stick-straight....any deviation would certainly not be ideal.

As for the pentameter, check the iambic one. :cheese:

As for the stove warmer on one side versus the other, thats almost always indicative of a partially, or completely, blocked air tube......I know you unblocked the left one, but is it completely cleaned out?

I'll leave sopme of the other questions for other folks here.
 
ok so I just did a test and in the center of the stove at the top on high (blower on high and feed on 7 ) I get 191 degrees at the stove and on the far right I get 164, now when i go to the far left I get 144. Yes the tubes are both completely cleaned out and there is nothing that is blocking them. The other day I was measuring almost 300 degrees at the center of the blower. It was so hot I couldn't even keep my hand there for more then 2-3 seconds.
 
jlongo1115 said:
Hey guys thanks for a great forum you have here it has helped me out more then once :). I have a few questions that I am hoping one of you guys can help me with. I am not getting the heat out of my stove that I should be getting and I am not sure why. Sometimes I get so much heat that I can't even stand in front of the stove or I will get burned and then over times it is barely warm. I am burning hamer hot ones so I know it isn't the pellets. I recently purchased a new room sensor and have not had much luck with it . It seems like it just doesn't put out the same heat as when it is in stove temp. One thing I have noticed is that my distribution fan doesn't get any louder once it hits about 40% of the way up. Once it hits high from half way to high it doesn't do anything else at all is this normal? could I have a bad gasket somewhere? I know that it is clean as I just recently removed all of the front parts(burn pot,guide,heat exchangers,ect.... ) and cleaned them thoroughly and also scrubbed the exhaust ports behind the heat exchangers. The left exhaust port was plugged solid from the guy who owned the stove before me so I cleaned everything and what a difference that made. So I continued learning about the stove and learned that the distribution fan was very important to clean also so I decided to take a look and holy COW it was plugged up with what looked like a small poodle so i removed both fans and cleaned them thoroughly with a vacuum and compressed air. I cleaned out the fines from the box next to the main exhaust and also the esp box which was full of about 8 inches of thick ash. One thing I noticed is that my esp is bent downward would this cause any problems? I heard from a installer that it either works or it doesn't and as long as it works it doesn't matter if it is bent is this true? Could I have a bad gasket? I checked the front gasket and it seems to be fine, it looks good and makes a solid connection when shut. What about the distribution blower gasket? is there a gasket on the combustion blower? I just learned that the holes in the burn pot where the flame guide lines up are for air inlets? what if they are clogged would that cause a problem? can a blower start to go bad and just not work as well as it should or is that like the esp because the same installer told me that it also either works or it doesn't. Is there any switch or pentameter that could be bad on the fan adjuster that won't let it go into high ? I also noticed that the air is hottest from the center of the stove to the right of the stove(looking at it) and the left air blowing out is not as hot what could cause this? I am sorry for a million questions here but I am just trying to give you the full details so you can get the best idea of what I am dealing with.
thanks for all your help guys I really appreciate it.

Did you write all of this in one breath?
 
My insert has always run a little warmer on the right side unless I am running it hard, then it seems to even out. I run my stove on manual rather then the thermostat because I'd rather have the house a little cool then run out of pellets at 4 am. Yes my distribution fan seems to hit high half way into the adjustment. Remember, the temp probe has a lot of control input into the dist fan speed. If you slow the distribution blower down the output temps will be higher
 
yeah I was messing around with both settings room temp and stove temp. now it is on stove temp not room temp so the room temp probe should not be doing anything right?
 
Are you 100% sure the air tubes aren't blocked? Looking at the inser, the airtube on the right that goes out to the back of the stove many times get plugged up. If you push your cleaning 'wand' in there, it can go back quite a ways and you may think you are bottoming out at the end of the tube. But sometimes a 'plug' of carbon seals the end of the passageway. So if you push and push, all of a sudden, bingo, you pop the plug out and you can now push your wand another 6-9 inches or so. That stupid 'plug' can cause all kinds of issues. I learned this the hard way.
 
superchips said:
jlongo1115 said:
Hey guys thanks for a great forum you have here it has helped me out more then once :). I have a few questions that I am hoping one of you guys can help me with. I am not getting the heat out of my stove that I should be getting and I am not sure why. Sometimes I get so much heat that I can't even stand in front of the stove or I will get burned and then over times it is barely warm. I am burning hamer hot ones so I know it isn't the pellets. I recently purchased a new room sensor and have not had much luck with it . It seems like it just doesn't put out the same heat as when it is in stove temp. One thing I have noticed is that my distribution fan doesn't get any louder once it hits about 40% of the way up. Once it hits high from half way to high it doesn't do anything else at all is this normal? could I have a bad gasket somewhere? I know that it is clean as I just recently removed all of the front parts(burn pot,guide,heat exchangers,ect.... ) and cleaned them thoroughly and also scrubbed the exhaust ports behind the heat exchangers. The left exhaust port was plugged solid from the guy who owned the stove before me so I cleaned everything and what a difference that made. So I continued learning about the stove and learned that the distribution fan was very important to clean also so I decided to take a look and holy COW it was plugged up with what looked like a small poodle so i removed both fans and cleaned them thoroughly with a vacuum and compressed air. I cleaned out the fines from the box next to the main exhaust and also the esp box which was full of about 8 inches of thick ash. One thing I noticed is that my esp is bent downward would this cause any problems? I heard from a installer that it either works or it doesn't and as long as it works it doesn't matter if it is bent is this true? Could I have a bad gasket? I checked the front gasket and it seems to be fine, it looks good and makes a solid connection when shut. What about the distribution blower gasket? is there a gasket on the combustion blower? I just learned that the holes in the burn pot where the flame guide lines up are for air inlets? what if they are clogged would that cause a problem? can a blower start to go bad and just not work as well as it should or is that like the esp because the same installer told me that it also either works or it doesn't. Is there any switch or pentameter that could be bad on the fan adjuster that won't let it go into high ? I also noticed that the air is hottest from the center of the stove to the right of the stove(looking at it) and the left air blowing out is not as hot what could cause this? I am sorry for a million questions here but I am just trying to give you the full details so you can get the best idea of what I am dealing with.
thanks for all your help guys I really appreciate it.

Did you write all of this in one breath?

My thoughts EXACTLY! Damn.
 
jlongo1115 said:
yes I actually had the same issue and at first I thought i broke through the back of the stove into the exhaust lol.
so, now you can see the brush from right side when cleaning the left?
 
jlongo1115 said:
yes I actually had the same issue and at first I thought i broke through the back of the stove into the exhaust lol.

If you look down the right hand exhaust tube with a flash light can you see the clean out tube? If you can not then you still have further to go. I say this because I ran the entire first year and didn't realize that I wasn't pushing far enough. Since then I push till I see the cleanout tool.

I know we are harping on this but those of us with this great stove have found a few places where we would love to see design improvements and this is the biggest one.
 
The holes in the burn pot are clear and the holes ar 2 and 10 around the auger are clear right?
 
The wholes in the burn pot are clear and I haven't checked the ones near the flame guide yet I will when I get home. Would this cause the problem s im having?
 
jlongo1115 said:
The wholes in the burn pot are clear and I haven't checked the ones near the flame guide yet I will when I get home. Would this cause the problem s im having?

It can cause issues. If the left one is blocked then you will have less air on the left and more on the right/middle. Usually you will also see a different flame condition and perhaps some ash color differences if it is a localized air supply issue.
 
Also there should be a gasket between the combustion motor and the housing it mounts to. There is on mine and it is called out in the parts manual.

I would have to say though that whatever the issue is it isn't likely your combustion blower. You are getting good air on one side and high temps (higher than me) on that side. If the combustion blower was the issue and everything else was good then you would see issues across the whole unit.

If you have completely eliminated the exhaust channels as an issue then you have two other places to look. There could be something different with the air comming into the combustion chamber or there could be something different with the distribution air moving over the heat exchanger.

On the combustion chambler the air splits and goes to the holes at 2 and 10 and the air comes up through the pot. If your sure the pot is clean and the channel behind it is empty then check those holes.

If everything is good there then look at how fast the hot air is comming out of the distribution system If the air is slower on the right that will make it very hot. If it is faster on the left then it will be cooler.

Just for your reference the hottest I have ever gotten the air out of my distribution system has been 170 degrees and it needs to be cranking and the pellets in the hopper for a while to get there.

NOTE: I store the pellets outside and when I dump them in I can affect the distribution temps by 15 degrees while the pellets come up to temp.
 
On the distribution fan. Yea that is happening on mine to nut it is about 60% no matter how high it never seems to get any louder. Never been an issue though.
 
You need to check the air flow (speed) etc. I have a themometer mounted 6 inches in the vent and even when the distribution blower is off I can not get 300. about 265 but the stove is just barely burning.
 
jlongo1115 said:
If you pull it out a few inches I noticed a higher temp. O had it about 2the inches in and it was over 300.

Your distribution fan is running and you are getting that temp???
 
ok so when I got home I started tinkering and before I knew it I had it all apart. I found a lot of ash that was up on the inside right under the exit where the air comes out. I cleaned it really well, took off the heat exchangers and scrubbed them with a wire brush front and back. I scrubbed the accordion style things behind the heat exchangers with a wire brush also and got rid of a ton of caked on soot. So I stuck my 1 3/4 in vacuum down both exhaust ports and when I did the left one I noticed I had to give it a serious push to get it through to where I could see it from the right port. I kept going back and forth and every time I would pull the vacuum back a inch I would hear large rocks being sucked up. I did it about 15 times and kept getting the same rocks sucking up the vacuum. I did it until nothing would come through and it went to the other side nice and easy. I vacuumed everything out and scraped the burn pot and compass. I just started it up and I already notice a HUGE difference so i put my thermometer up to the blower on full and it went over 400 degrees about 4 inches down in. I am using a electronic meat thermometer with a probe and it read error once it went over 400. I took a picture of it at 360 because it was burning the c$#p out of my fingers lol.
 
OK

The thins you removed and cleaned behind are the cast iron deflectors. The exhaust and flames will run up to the top of them and then be sucked back down behind them. The accordian thing you cleaned behind them is the actual heat exchangers. On the other side of those is the distribution air. You need the heat and exhaust to run up to the top and be sucked back down next to them to get good efficiency. You need these things to be cleaned. I do what you did every saturday AM and that is what we call a cleaning. If you were still getting crap out from the left tube then that was the issue.

I'm still amazed at the level of heat you are getting again I get nowhere near that temp. I will say this though the distribution fan can be felt 12 feet away when the stove is pumping out the heat. I think you will find that you will get a more level heat for about a week or so and then you will see the temps drop again as the heat exchanger becomes coated with fly ash. Next time just use a 3" paint brush to clean it off.

Rick
 
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