Central Boiler 760HDX - Montana

[DDW_OR]

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now for the review
Pro:
the mess of having the wood heat is all outside
heat is stored in the water
one fire to heat several buildings. house polebarn garage shop greenhouse
bugs and spiders are not carried into the house
have heat for when the world goes #%$$%#%$$%#$%@#%$%$#

Con:
i can buy a lot of natural gas for the $30,000 ++ that the furnace and install cost
or a lot of firewood for the wood furnace that still is in the basement.

Conclusion:
would i have done this knowing what i know now. Yes

[DDW_OR]

partial cleaning

tools from Central boiler


 

 

my tools


 

 

[DDW_OR]

the cleaning 50%
in late spring i will do a 100% cleaning



 

 

 

[sublime68charger]

Why you clean it out?

How due the Heatexchangers in the back look?

I pulled the Tubrolaters out of mine last year and I'm still burning the same amount of wood but don't have the build up in the back like I did with the turbolaters.

Though over half of my wood is more on the not dry side than dry so I get build up from that.

But I am hoping to have next year's wood cut by this spring vs the last 3 years when I have been cutting in the fall to make enough for the upcoming winter.

[beenthere]

Try to give your wood at a minimum of 12 months seasoning time (works for ash) and add another 12 months if oak. 
You will be amazed at the extra heat from your wood if you do. 

[DDW_OR]

Why you clean it out?

How due the Heat exchangers in the back look?

having trouble getting the chamber to 100%, usually 75%
so since the fire was out, decided to do a partial cleanout
could not remove the Tubrolaters. so will try again next time
forgot to take photo
have plans in 2023 to extend the leantoo, to be over the sawmill, Fire Wood  processor, and firewood

[PoginyHill]

In my experience, less dry wood will lead to poor reaction chamber performance. A good bed of hot coals will help.

[Rhodemont]

I completed the installation of a Heatmaster G7000 in October.  Did it all myself with a few phone calls to the dealer and plumbing supply.  Toughest thing was working with that insulated PEX tubing pipe, it was like wrestling a bull.  It is now heating the house and workshop off the barn.  Next year the old garage/barn will be coming down and a new timber frame raised.  The second circulating loop on the G7000 will go to the new garage.  The currently operating heating loop goes to a 70 plate heat exchanger just above my Viessman oil boiler.  A pump circulates through the heat exchanger to the oil burner keeping it hot all the time so it does not need to fire.  This heats the domestic water, first floor radiant heat, and second floor base board plus a zone going out to the shop.  The Viessman has gone off a couple times because it is computer controlled with outdoor sensors, ramp up /down curves, and day/night settings.  I have been adjusting all these settings so the Viessman does not sense the temp drop in the evening and fire to ramp up the slow to reacting radiant heating.  And also not to fire fire in the morning when it wants to get ready for domestic hot water use.  Years ago when I installed the Viessman it took a couple months to get all the setting just right.  Once it was running I removed the Consolidated Dutchwest wood stove from the fire place hearth.  For the past 36 years that was the primary source of heat for the first floor burning abut 5 cord/year.  In it's place for some heat and ambiance I installed a Jotul Sebego gas stove.
Still have more to learn but so far everything is going very well.

[beenthere]

In my experience, less dry wood will lead to poor reaction chamber performance. A good bed of hot coals will help.

Is that "less-dry wood" or meaning "less dry-wood" ?  

[PoginyHill]

More wet. 

[Dan_Shade]

Do any of you use creosote sticks or powder to assist in outdoor boiler cleaning? 

[PoginyHill]

I do not.

[trapper]

soda cans

[DDW_OR]

soda cans

please explain how burning aluminum will help with creosote

[beenthere]

Have heard of that trick, but didn't see any effect when I tried it. 

Googled, and read this:

In fire tests conducted on aluminum materials, it was found that when fire temperatures exceed the melting point (which occurs at a range of 600-660°C), aluminum surfaces that are exposed to the fire can melt, but do not burn.  Heating the cans causes an increase in heat in a chimney which can help prevent creosote from building up on a clean chimney. However, aluminum oxides are very stable and do not react to high temperature. This means that there will not be much of an impact on built-up creosote.     

[DDW_OR]

found that the furnace was not burning correctly
every time i closed the firebox door there was a "Roar" from the air box
last time smoke came out of the air box.

so i opened the exchanger door on the back
the turbulators where completely plugged with creosote
removed all of them, then used the propane torch "weed torch" to burn the creosote off
then scraped, then burn, then final scrape
the creosote also glued the door insulation to the exchanger
plan to get some roofing flashing to place in between the door and the exchanger
not connected to either one except by friction.





 


 



 

[beenthere]

What is your conclusion about reason your creosote build-up happens so quickly? 

My guess is wood too wet.

[DDW_OR]

What is your conclusion about reason your creosote build-up happens so quickly?

My guess is wood too wet.

the softwood i am burning is from live trees that blew down 2 years ago.
so the moisture content is low, but the sap content is high

[Ianab]

Not sure on your boiler design, but softwoods will generally burn OK with a hot burning fire, but all sorts of smoke / creosote if they are dampered down too much.  We don't run the larger wood boilers here, just smaller inside wood burners. But a good method with pine etc is to only part load the fire, and let it burn a smaller but hot fire. You have to feed it small amounts more often of course, which is easy if you are sitting beside it in the lounge. Stacking the fire full, then closing the damper can cause problems. 

I don't know if that applies to your situation, but is it possible to run some small loads during the day to get the heat up and burn off some creosote? I'm just thinking the dry softwood flares up into a hot flame, the boiler senses it has enough heat, and damps the fire too much, to a smouldering creosote maker. 

Other option would be to mix of wood in some slower but longer burning woods.

[DDW_OR]

Good advice for a standard furnace 

But this is a computerized down draft furnace