Condensation ??

 
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McGiever
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Post by McGiever » Fri. Mar. 11, 2016 1:32 pm

Pressure switch is your safety...why did stove not stop?

Dirty pipe w/ flyash accumulation can reduce/restrict normal exhaust volumes expelled.
High winds outside may help contribute to house pressure changes inside too.

Do you use a barometric damper in pipe?...this helps even out those pressure swings.

Do NOT leave anybody or any living creature you are fond of out in that garage. :sick:


 
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Post by SWPaDon » Fri. Mar. 11, 2016 3:56 pm

McGiever wrote:Pressure switch is your safety...why did stove not stop?

Dirty pipe w/ flyash accumulation can reduce/restrict normal exhaust volumes expelled.
High winds outside may help contribute to house pressure changes inside too.

Do you use a barometric damper in pipe?...this helps even out those pressure swings.

Do NOT leave anybody or any living creature you are fond of out in that garage. :sick:
If it's an attached garage, it can be just as dangerous inside the house.

 
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Post by McGiever » Fri. Mar. 11, 2016 4:42 pm

SWPaDon wrote:
McGiever wrote:Pressure switch is your safety...why did stove not stop?

Dirty pipe w/ flyash accumulation can reduce/restrict normal exhaust volumes expelled.
High winds outside may help contribute to house pressure changes inside too.

Do you use a barometric damper in pipe?...this helps even out those pressure swings.

Do NOT leave anybody or any living creature you are fond of out in that garage. :sick:
If it's an attached garage, it can be just as dangerous inside the house.
For Sure!

 
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Post by Cyrus2508 » Fri. Mar. 11, 2016 4:47 pm

you are all correct ... stove has been shut down since early this morning... working with my local Harman dealer who recommends new door gaskets and he is possibly going to let me borrow a new pressure switch to see if that's my problem if it is I'm out around $400 if not I still have $400 and the problem !!! Very nice of the dealer to lend this part to me I think, hope we figure it all out this weekend thanks for every ones concern we are still alive and kicking !!!!

 
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Post by Cyrus2508 » Fri. Mar. 11, 2016 4:51 pm

McGiever im not sure why the stove doesn't stop running if that is my safety switch.. but mountain man has a post on here with just about the same symptoms as mine and a new pressure switch was his fix !! So right now its a shot in the dark im hoping will work..

 
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Post by SWPaDon » Fri. Mar. 11, 2016 5:46 pm

Cyrus2508 wrote:McGiever im not sure why the stove doesn't stop running if that is my safety switch.. but mountain man has a post on here with just about the same symptoms as mine and a new pressure switch was his fix !! So right now its a shot in the dark im hoping will work..
Just remember, that switch is only one part of the fix. The switch is designed to shut the stove down if there is a problem and it didn't.

But you have a problem that needs addressed, whether it be too much combustion air as has been mentioned, a flue pipe that is plugged with flyash, or a dead animal, or collapsed pipe if you are using a liner or metal chimney. I don't think the gaskets are going to fix the problem, but they should be changed every so often anyway.

 
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Post by blrman07 » Fri. Mar. 11, 2016 8:11 pm

He is not venting to a chimney. He has a direct vent that is attached directly to the stove and usually vents through a wall via a 4 inch pipe. The probable fix on this is to disassemble the piping and clean it out. You also need to make sure the direct vent fan itself is clean and not "gummed" up with flyash. Warmer outside weather will not affect a direct vent as it is moving a fixed amount of air at all times like a power vent will. Difference is the power vent sucks it out and the direct vent forces it out.

Take the flue pipe apart starting at the boiler and make sure everything is clean clean clean and nothing is obstructing the pipe. Check this out while your waiting on the pressure switch. Just a matter of taking the pipe apart at the joints. You can check each joint for screws that you may have to take out to get the segments apart.

Note to self: put down a drop cloth before you take the pipes apart. You will have flyash inside them and if it falls and hits the floor it's like talcum powder. It will go every where. :shock: Don't ask me how I know this. :D as you take the pipes apart keep them horizontal and level, take them outside and dump them out in a bucket or open bag. Hit them with the heal of your hand to dislodge and stubborn fly ash.

Happy hunting. Let us know how it turns out.


 
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Post by SWPaDon » Fri. Mar. 11, 2016 8:36 pm

Thank you for the clarification of the direct vent Reverend Larry, I've never used one.

 
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Post by McGiever » Sat. Mar. 12, 2016 8:06 am

Bring this up again in case it is more revelant now than it first was...he commented of noticable/visable smoke coming from ash door and hopper. This is a big concern. Also indicates a failed safety componet if the stove continued to operate and didn't shut it down.

Might be a good idea to test the pressure switch and verify it is wired properly, in case a new one is not needed. :idea: It could be mis-wired or bypassed previously. :idea:

Hope you didn't get a hold of some Bit Coal, with all that Smoke. :idea:
Cyrus2508 wrote:ahhh yes mine pushes the air out of the stove !! I watched it burn lastnight and smoke was coming out of the ash bin door as well as the glass door although not as much as the ash door.. I will change rope gaskets tonight !! I do agree the combustion fan is a possibility now with that said in stove temp mode does the high low switch affect the combustion fan is that how you adjust it ?? I am also searching the forum for answers.. and appreciate all the help im getting its fantastic thank you !! p.s. as not to confuse anyone the smoke was also coming up thru the hopper and out the vent pipe outside .. funny I don't recall so much smoke from an anthracite burning coal stove ??

 
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Post by SMITTY » Sat. Mar. 12, 2016 8:28 am

Shouldn't these be using a 6" pipe, whether it's to a chimney or power vent? 4" seems small to me.

 
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Post by StokerDon » Sat. Mar. 12, 2016 10:54 am

SMITTY wrote:Shouldn't these be using a 6" pipe, whether it's to a chimney or power vent? 4" seems small to me.
The DVC500 has it's own, very unique square pipe with air intake and combustion exhaust all in one. There are other DVC500 threads that describe similar problems. I don't quite understand how this system works. The OP also mentioned something about adapting it to pellet stove pipe??? That could be a problem to.

-Don

 
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Post by Cyrus2508 » Mon. Mar. 14, 2016 10:44 am

ok heres what I've learned over the weekend.. It seems my 2007 stove is an "older" stove that Harman felt the pressure switch was a problem so somewhere along the way they discontinued my type of pressure switch. Now in order to get a new switch the one Harman is selling now I will need to get the new computer board as well because the new switch isn't compatible with the old board, my dealer is checking with Harman today to see what can be done.. I'm hoping that Harman will at least help compensate as they recognize its there problem but who knows I will find more out later today but this is just an update as to what I have found, thanks for everyones advice oh by the way the pipes are all clean I just installed the stove lastweek so ash buildup has nothing to do with the problem EVERYTHING is spotless !!! thanks again when I know more I will let you all know... P.S. I also replaced the rope gaskets on the doors = no more smoke from them ..
Bob

 
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Post by SWPaDon » Mon. Mar. 14, 2016 11:37 am

AHS took over the Harman line a while back, let us know what happens.

AHS Purchases Coal Stove Lineup From Harman!

 
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Post by McGiever » Mon. Mar. 14, 2016 12:58 pm

SWPaDon wrote:AHS took over the Harman line a while back, let us know what happens.

AHS Purchases Coal Stove Lineup From Harman!
Only the Harman COAL Stove line-up. Harman is still very much alive in the wood and wood pellet stove business.

 
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Post by SWPaDon » Mon. Mar. 14, 2016 1:41 pm

McGiever wrote:
SWPaDon wrote:AHS took over the Harman line a while back, let us know what happens.

AHS Purchases Coal Stove Lineup From Harman!
Only the Harman COAL Stove line-up. Harman is still very much alive in the wood and wood pellet stove business.
I guess I did neglect to specify that part :oops:


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