Outdoor Wood Furnace Info
Outdoor Furnaces - Manufacturers WITH EPA-Certified Models => Wood Boiler USA, LLC => Topic started by: ptt811 on December 20, 2011, 03:48:11 AM
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What does wood boiler recommend setting the temperature that the blower kicks off ??? And what do you recommend the differential be set at. There has been a lot of discussions at times about that and most people say to ask the manufacture ??
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I am not sure what they recommend but I normally set my Hardy on at 160 and off at 170. It seems that most set a 10* difference unless they have a gasser.
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I set mine as you did 160 on....170 off and I like that alot better.
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I use 155 140. Burns less wood with 15 deg. diff and lower operating set point. helps with cresote to.
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What you can run at depends on a lot of things like wood type, moisture content, boiler design, etc. I always suggest starting at 180 degrees and run there for a few weeks to see how it should operate and then start lowering it a little at a time and watch for creosote buildup, getting enough heat in the house or anything else changing. A lot of people go down to 140 -150 and say they burn less wood. If it is running just as clean at this temperature then it should be ok.
The only reason to lower the temperature is to try saving wood so if you are burning just as much at the lower temperature then turn it back up.
I am assuming that you have some type air shutoff on the air intake. If not then you probably want to start at 160 and go up watching what the max temperature gets up to. You don't want to boil the water.
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I am going to turn mine down again it was at 180* W/10*. I turned it down to 170* and it still gets up to over 200*.
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You have an air leak if your spiking over, no two ways about it!
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Yes there is an air leak probably in the door gasket. I replaced mine twice now in 4 years. I like 170-190 for hot water heat to old oil furnace for storage before going to radiators in old farm home. I turn off the oil furnace jet but leave the circulator on to heat house. Lowering temps may save wood but it usually increases creosote and water condensation from the wood. 20% moisture in air dried wood equals 20 pounds water in every 100 pounds of wood. This water will condense on uninsulated chimneys run down and make ashes damp in some brands. Also lowering house temp at night or day can cause problems. I've been heating with wood for over 30 years.
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Thanks Guys I think it has to be sucking air through the inducer fan. Its a new boiler.2 weeks old.
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Thanks Guys I think it has to be sucking air through the inducer fan. Its a new boiler.2 weeks old.
Doesn't it have an air shut off flap? If not you will also be getting a lot of creosote buildup and wasted wood.
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Yes it does i just havent figured it out yet i guess.
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Thanks Guys I think it has to be sucking air through the inducer fan. Its a new boiler.2 weeks old.
Doesn't it have an air shut off flap? If not you will also be getting a lot of creosote buildup and wasted wood.
It also has alot of creosote buildup on the inside of the boiler especially on the door and sides.
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One thing to check...Mine builds creasote around the door edge. When the door shuts it is between the gasket and the door frame. This makes an air gap because the creasote is holding the door slightly open.... I use a shovel ( not the best tool ) To scrape the bulid up off the door frame, a puddy khife would be a better tool for the job.
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Cut the air and reduce the load size. This year has been great because it has been so warm, but bad because the boilers have little load on them.
I doubt the seal is leaking but you could also tighten the handle a couple of turns.
I would guess it is more really seasoned wood and too much air.
Wish I had some seasoned wood :).
Blaine
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Cut the air and reduce the load size. This year has been great because it has been so warm, but bad because the boilers have little load on them.
I doubt the seal is leaking but you could also tighten the handle a couple of turns.
I would guess it is more really seasoned wood and too much air.
Wish I had some seasoned wood :).
Blaine
Thanks Blaine , You are probably right. You make some really great boilers,i love it.