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[randy_1]

Ok so I have smoke condensating in the stack and causing creosote to run down the outnside of the pipe onto the roof then down the side of the boiler. I think my stack temp is too low I can't seem to get it much over 220 f. Any suggestions?
 

[slimjim]

Randy, adjust the air intake on the blower a bit more open, 2-3 turns, watch for small chunks of charcoal in the top of the first pass,if you get the charcoal up on the ledge you are giving it to much air also remember that we are in the shoulder months and there is not much call for heat right now try not cleaning the tubes as often as that will allow the exhaust temps to rise a bit, we are looking to stay above 250 degrees, clean the bioler tubes at above 320 degrees.

[randy_1]

Ok thanks

[racnruss]

yeah, terrible problem, can't get stack temps over 220!
 That is how efficient your stove is, enjoy it.  My stack temps are around 500 degrees, think how much less wood I would have to process if my stack temps were 220.

Natures Comfort GT220 gasser.

[Scott7m]

yeah, terrible problem, can't get stack temps over 220!
 That is how efficient your stove is, enjoy it.  My stack temps are around 500 degrees, think how much less wood I would have to process if my stack temps were 220.

Natures Comfort GT220 gasser.

But if he don't get those stack temps up in the 275-300 range it will cause him a lot of issues and a stove failure at some point.   If your could just keep stack temps at 290-300 it would be perfect and safe, gotta have enough heat to carry the moisture out


Did you rebuild your gt220?!?

[randy_1]

I'm hoping the stack temp increases once the boiler starts cycling more frequently as the temps drop outside. As it is now its the middle of oct in Maine and we leave the windows open 24/7 .... I'm going to try feeding it more air as per slim jims suggestion...

[Scott7m]

More air could help it,letting your tubes get dirty def would but I know we don't like doing that. 

As the stove works harder, the tubes should stay cleaner, I see nothing to indicate the problem should get better with increased load

[slimjim]

Randy, try the air adjustment I mentioned and bring the water temp up a bit more as well, it is OK to see a bit of steam out of the vent when it is at it's hottest and then back the temp off a few degrees and let it run. Stack temp you are looking for is around 250-270 when clean. You may be getting some rain or morning dew settling in the stack as well and I would not be concerned about it. What is the on cycle time for the blower when it comes on to when it shuts down? We are looking for on cycle of at least 20 minutes before shutting down, we may need to adjust the differential on the aquastat, it should be around 5 degrees now, expanding it will make the blower stay on longer in the burn cycle.

[randy_1]

I opened the blower motor up to almost a 1/2" of opening and the water temp is set at 196. this morning with all of the zones calling at the same time I had a stack temp of a little over 250 and it was gassifying very nice. So I think/ hope its more of a seasonal light load situation more than anything. as far as the blower motor cycle time goes I haven't done anything with it its right where it was when we fired it up I dont recall seeing how to change this in the manual.


Thanks again
 

[slimjim]

To change the differential press menu key, SP will show on the screen, up arrow to Dif, it should read 5 right now to change it simply press, menu and change the setting up or down and menu again to lock

[randy_1]

ok thanks again for all the help...