Heat Delivery Issue

A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat. They can be used as primary heat, supplementary heat or have a dual set up with your existing oil/gas furnace.
waldo lemieux
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Stove/Furnace Make: efm
Stove/Furnace Model: s-20
Location: Ithaca,NY

Post Wed. Jan. 22, 2014 6:48 am

So, its -12 * (the pucker star) and my radiant zone cant keep up. I have a 6" circ running three 200'
loops. If I put a three speed pump(on high) in its place will that push more heat into the slab? The water temp in is 120 and return 80 so Im assuming until I get 120deg water back there is room for more btu/hr in the slab. Is this sound reasoning? I should mention that the efm is cycling on at about 30% of the time so its not a production issue.Thanx in advance for the input.....

Waldo
When faced with a seemingly impossible task, my grandfather always said "can't never can, untill try comes along"


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freetown fred
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Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut
Location: Freetown,NY 13803

Post Wed. Jan. 22, 2014 6:54 am

Can't help with all that fancy stuff, but ya know if push comes to shove, ya can always come out to Freetown with the tribe. Good luck with all that wl
"A people that values it's privileges above it's principals, soon loses both"--Dwight D Eisenhower

waldo lemieux
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Stove/Furnace Make: efm
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Location: Ithaca,NY

Post Wed. Jan. 22, 2014 7:00 am

Thanx Fred, but there isnt any school today ,and I wouldnt subject you or the tribe to my kids.Im thinkin I got plumbing to do today... :roll:
When faced with a seemingly impossible task, my grandfather always said "can't never can, untill try comes along"

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Sting
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Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG
Location: Lower Fox Valley = Wisconsin

Post Wed. Jan. 22, 2014 7:04 am

Supply and return temps should be with-in 12% + or - 2 or 3% -- it depends

yes - maybe - if you push more volume out to your radiation you will return warmer liquid

you don't want supply and return temps close - that only means your radiation is not as productive as it could be and your wasting circulation and energy

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Sting
When you turn your boiler on -Does it return the favor?
I have finally lost my mind. Don't bother to return it. It wasn't working properly anyway!

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Sting
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Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG
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Post Wed. Jan. 22, 2014 7:05 am

you may also need to up your supply temp on days like these

its all system balance
When you turn your boiler on -Does it return the favor?
I have finally lost my mind. Don't bother to return it. It wasn't working properly anyway!

waldo lemieux
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Stove/Furnace Make: efm
Stove/Furnace Model: s-20
Location: Ithaca,NY

Post Wed. Jan. 22, 2014 7:28 am

Sting

Tried the turning up the temp thing,unfortunately Ive never used it in 13 ys and it is seized. And I don't think this is a good time to tear the damn thing apart . This day is shaping up to be a beaut already, thankfully I did get beer last night :D
When faced with a seemingly impossible task, my grandfather always said "can't never can, untill try comes along"

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Sting
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Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG
Location: Lower Fox Valley = Wisconsin

Post Wed. Jan. 22, 2014 7:32 am

What "thing" are you turning up???

tempering valve?

plain valve?

boiler?
When you turn your boiler on -Does it return the favor?
I have finally lost my mind. Don't bother to return it. It wasn't working properly anyway!

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Sting
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Posts: 2967
Joined: Mon. Feb. 25, 2008 4:24 pm
Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG
Location: Lower Fox Valley = Wisconsin

Post Wed. Jan. 22, 2014 7:34 am

if you have an thermal reacting tempering valve in the line - can it be bypassed? - yes now is not the time for pipe wrenches -- baby its cold outside

well --- hummmm -- can you up the temp on the boiler -- if indeed the "thing" is stuck --- then it will exponentially send more energy to the loop if hotter water is available
When you turn your boiler on -Does it return the favor?
I have finally lost my mind. Don't bother to return it. It wasn't working properly anyway!


waldo lemieux
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Posts: 2261
Joined: Sun. Sep. 30, 2012 8:20 pm
Stove/Furnace Make: efm
Stove/Furnace Model: s-20
Location: Ithaca,NY

Post Wed. Jan. 22, 2014 7:50 am

Honeywell Sparcomix valve is seized. Im gonna try loosening the cartridge and see if that works. Trouble is, the wrench is in the truck and Im a *censored* when it comes to cold. That wrench weighs ten pounds and at -12 ,thats alot of cold :crazy:
When faced with a seemingly impossible task, my grandfather always said "can't never can, untill try comes along"

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Sting
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Posts: 2967
Joined: Mon. Feb. 25, 2008 4:24 pm
Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG
Location: Lower Fox Valley = Wisconsin

Post Wed. Jan. 22, 2014 7:54 am

waldo lemieux wrote: the wrench is in the truck and Im a *censored* when it comes to cold. That wrench weighs ten pounds and at -12 ,thats alot of cold :crazy:
I agree - I walk in my "shop" these days and the 9/16 wrench sticks to my hand - like licking an aluminum flag pole :shock:

those pesky valves shoud be installed like circ pumps --- with isolation valves because you know anything with tits - wheels - or springs are going to give you trouble
When you turn your boiler on -Does it return the favor?
I have finally lost my mind. Don't bother to return it. It wasn't working properly anyway!

kevinjohn
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Posts: 8
Joined: Mon. Jan. 12, 2009 8:28 pm
Stoker Coal Boiler: 1963 efm 350 coal stoker
Coal Size/Type: buck
Stove/Furnace Make: efm
Stove/Furnace Model: 350 w/auto stoker
Location: new ringgold,pa

Post Wed. Jan. 22, 2014 4:11 pm

from where I sit,We were always looking for a 20 deg split between supply and return temps,If it was my place I think that I would go for the 3 speed pump and try to get your delta t a little closer to 20 deg instead of the 40 deg split that you are now seeing.If you have a tempering valve raising the boiler water temp will not increase the temp of the water entering the radiant system,besides if the floor is too warm you have a chance at damaging your floor covering.I did a radiant retrofit in my own home,before installing the radiant, I had hot water baseboard that I left in place and have on a separate tstat set 2 deg cooler than the radiant and on these bitter cold nights here in rural Schuylkill county I need that extra bit of baseboard heat to keep the house at a nice comfy 74 deg.Hope that this info helps and makes sense.

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Lightning
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Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Anthracite/Awesome Size
Location: Olean, NY

Post Wed. Jan. 22, 2014 4:28 pm

Can you increase the temperature supplying the zone while maintaining flow volume? That should increase BTU output from the zone, shouldn't it?

waldo lemieux
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Stove/Furnace Make: efm
Stove/Furnace Model: s-20
Location: Ithaca,NY

Post Wed. Jan. 22, 2014 5:37 pm

So ,the mixing valve adjustment knob is seized and wont allow me to raise the water temp. I think that probably getting a three speed pump will push the 120 deg water further into the system and when I can get the valve freed up ill be able to increase water temp to the floor as well. I just don't dare to tear the valve apart right at the moment. Though it did make it to 0* this afternoon :junmp: The temps in the house started climbing , and made it to 67 . Just not the toasty Im used to :(
When faced with a seemingly impossible task, my grandfather always said "can't never can, untill try comes along"

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Rob R.
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Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Wed. Jan. 22, 2014 6:53 pm

What model circulator are you using right now?

waldo lemieux
Member
Posts: 2261
Joined: Sun. Sep. 30, 2012 8:20 pm
Stove/Furnace Make: efm
Stove/Furnace Model: s-20
Location: Ithaca,NY

Post Wed. Jan. 22, 2014 7:10 pm

Rob,

bell and gossett nrf-22
When faced with a seemingly impossible task, my grandfather always said "can't never can, untill try comes along"


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