How should I set my variable speed blower fan?

How should I set my variable speed blower fan?

PostBy: cshrimpt On: Sat Jan 11, 2014 11:12 am

All,

I recently purchased an Alaska Channing III stoker and I'm not sure of the purpose of the variable speed blower. The coal feed auto heat control settings are obvious. Higher setting = hotter burn. My question concerns the blower speed. Why wouldn't I just set the blower to max and leave it there? What conditions determine whether it's set high or low?

Thanks,

Craig
cshrimpt
 
Hot Air Coal Stoker Stove: Alaska Channing III

Re: How should I set my variable speed blower fan?

PostBy: dcrane On: Sat Jan 11, 2014 1:47 pm

my two cents with most the variable speed blowers ive used... typically set for less speed is better. #1 its quieter #2 it does not cool the stove to much (something you want to avoid) #3 its better to maintain a low/quite constant blow than turn on and off as needed (even a VERY slight blow of that heat outward is enough to get that slowly ripple outward as much as possible, more does NOT make it round anymore corners or get through any more doorways down the hall than it otherwise would with a nice steady constant slow blow (doorway fans can be utilized from their if needed...) #4 less wear on motor #5 less electricity.... need i go on ;) just saved ya my 10 year learn curve on stove blowers toothy
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: How should I set my variable speed blower fan?

PostBy: Lightning On: Sat Jan 11, 2014 3:17 pm

You mean the convection blower right?
I have to disagree with Mr Doug. I think a higher setting will give you better heat transfer efficiency and better heat distribution. That is my nickels worth of free advice lol.

Edit, I should have read more thoroughly.. Run the blower according to conditions and comfort.. During warm weather my furnace blower toggles on and off automatically which keeps the furnace from over heating and limits heat distribution that isn't needed.. During cold weather the blower runs non stop at times to again keep the furnace from over heating and to provide the heat distribution that is more needed.
Last edited by Lightning on Sun Jan 12, 2014 11:29 am, edited 1 time in total.
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash


Re: How should I set my variable speed blower fan?

PostBy: dcrane On: Sun Jan 12, 2014 7:04 am

Lightning wrote:You mean the convection blower right?
I have to disagree with Mr Doug. I think a higher setting will give you better heat transfer efficiency and better heat distribution. That is my nickels worth of free advice lol.


oh great... well that sure helps him out (one says max the convection blower, one says minimize the convection blower toothy)... that only works for the few minutes your stove is blazing hot, he will find after load ups, on mild days, times when he does not wish to maintain a 400-500 degree surface temp that his blower on max will feel like cool air (even though you may not feel air circulation blowing on you from across the 20' living room its still happening even though your not feeling the wind in your face so to speak!) after it drops his stove temps by cooling down the stove (this happens to a lessor degree with heat tubes in the combustion chamber, so im sure it varies stove to stove)... the benefits of keeping a blower on max are just not their for me, but try it yourself for a few days both ways and let us know what you find ideal.
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: How should I set my variable speed blower fan?

PostBy: cshrimpt On: Sun Jan 12, 2014 9:20 am

So is the idea to try and maintain a specific surface temp? I know if I crank it up all the way and leave the blower off, the unit will shut down if it gets too hot.

Thanks,

Craig
cshrimpt
 
Hot Air Coal Stoker Stove: Alaska Channing III

Re: How should I set my variable speed blower fan?

PostBy: coalkirk On: Sun Jan 12, 2014 9:28 am

Craig the idea is to be warm and comfortable in your unique surroundings. Every home is different. Layout, energy efficiency, etc. No one can tell you with any certainty which is going to work best for you. Try it at various settings and note your results. What works best will likely be different depending on what kind of "vortex" is outside of your door on any given day. It's not rocket science. It's burning 300 million year old rocks to stay warm.
coalkirk
 
Stoker Coal Boiler: Harman VF3000
Coal Size/Type: antrhcite/rice coal

Re: How should I set my variable speed blower fan?

PostBy: Ed.A On: Sun Jan 12, 2014 9:33 am

Normally, I have my blower set at medium ( take into consideration stove location and heat distribution) on mild days it's set to low, but when we had sub 0 temps a few days back the stove cranking and so was the blower.

Yes Air Wash effect will be noticeable under the right circumstances.

Soooo, Dougie was correct and so was Kirk. :)
Ed.A
 
Hot Air Coal Stoker Stove: Alaska Channing III/ '94 Stoker II
Coal Size/Type: Rice

Re: How should I set my variable speed blower fan?

PostBy: Leadslingingdaddy On: Mon Jan 13, 2014 12:56 pm

I found that setting my vari speed blower at the 1100 position both had enough force and did not cool the stove down too much...

I purchased a TStat from Johnson Controls and can watch the temp of hot air being introduced into the vent system.....I could adjust Convection, Coal Feed, and Combustion Air to get the desired outcome....HEAT!!

Its all part of the learning (tinkerinig) aspects of it.....I keep a chart of outside/inside temp, register and return air temps, Duct/Stove temp, blower speed and Coal feed speed.
Leadslingingdaddy
 
Hot Air Coal Stoker Stove: Alaska Dual Stoker 140
Coal Size/Type: Rice
Stove/Furnace Make: Alaska
Stove/Furnace Model: 140 Dual Feed

Re: How should I set my variable speed blower fan?

PostBy: oliver power On: Tue Jan 14, 2014 4:22 am

Personally, I prefer the lowest setting possible, without hearing motor strain. If you had no speed control, the fan would run on hi all the time. The speed control that comes with a heating appliance is to slow it down, not speed it up.
oliver power
 
Stoker Coal Boiler: KEYSTOKER Kaa-2
Hand Fed Coal Stove: Hitzer 50-93 & 30-95, Vigilant (pre-Vigilant-II)
Baseburners & Antiques: MANY (Mostly when burning wood)
Stove/Furnace Make: HITZER / KEYSTOKER
Stove/Furnace Model: 50-93 & 30-95 , Kaa-2

Re: How should I set my variable speed blower fan?

PostBy: blrman07 On: Tue Jan 14, 2014 5:47 am

I have no speed control on my feeder, combustion, or convection blower. They are hard wired and run 24/7. I have a switch wired into the circuit going to the convection fan so on days where the temps go up (not lately around here!) I shut the fan off completely.

There is a very big difference in heat output with my stove depending on whether or not the fan is running. I want a lot I turn on the fan. I want a little I turn the fan off and let it just radiate heat. Fans are put on stoves to do one thing. That is to move room air across the stove surface and push the heat into the room faster than you would do with natural circulation. If Momma is cold, I turn up the stove and turn on the fan. If Momma is too warm I turn down the stove. The last thing I do to cool down the house is turn off the fan.

I have just recently started seeing this trend towards making sure that your stove maintains a very specific surface temperature and if you vary away from that number your not burning efficiently. Don't be concerned about setting and keeping a specific surface temperature. The good thing about coal stoves is they are designed to take them from idle to cranking flat out depending on how much heat you want. I have an infrared laser thermometer that I only use to demonstrate how hot the stove is and how cool the walls are right next to it when we have company over. Like they say in the car commercials, mileage may vary.

The only rule around here that determines if the fan is on or off............Is Momma warm or not. :D

Rev. Larry
New Beginning Church
Ashland Pa. 17921
blrman07
 
Hand Fed Coal Boiler: Bucket a Day
Hand Fed Coal Stove: installing a VC 2310
Coal Size/Type: Pea/Nut/Wood in the VC and anything that will fit in the Bucket a Day. It's not fussy.

Re: How should I set my variable speed blower fan?

PostBy: Chuck_Steak On: Tue Jan 21, 2014 5:59 pm

oliver power wrote:...The speed control that comes with a heating appliance is to slow it down, not speed it up.


I think it's there to be able to set it for whatever works best for you...
Full blast.... snail speed... or somewhere in between. ;)

But the thing is, they don't move tons of air, relative to the amount of
heat mass in a coal stove.
I doubt you would see much difference to be honest. (in stove temp)

Yes, the air coming out may be a tad cooler than on low, but there is more of it.
Put another way, You can blow out e.g. 50cfm at 135°, or 110cfm at 100°.
You will probably get as much heating value in the room,
either way, as you are reheating room air
that you are scrubbing off the stove. It's not like taking outside air in,
and blowing the same amount out the chimney.
Biggest difference may be that you are moving the air more, in the room,
with the higher setting.
But I don't really know... :oops:
Dan
Chuck_Steak
 
Coal Size/Type: mostly nut, sometimes stove, Santa brand
Stove/Furnace Make: Harman
Stove/Furnace Model: Mark III

Re: How should I set my variable speed blower fan?

PostBy: McGiever On: Tue Jan 21, 2014 6:11 pm

Fan speed is but only one of the different variables used to control heat output...don't ignore those other variables also used.
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek