Heat delivery issue

Heat delivery issue

PostBy: waldo lemieux On: Wed Jan 22, 2014 7:48 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
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20

Re: Heat delivery issue

PostBy: freetown fred On: Wed Jan 22, 2014 7:54 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
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Heat delivery issue

PostBy: waldo lemieux On: Wed Jan 22, 2014 8:00 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:
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20

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Re: Heat delivery issue

PostBy: Sting On: Wed Jan 22, 2014 8:04 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

Kind Regards
Sting
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Heat delivery issue

PostBy: Sting On: Wed Jan 22, 2014 8:05 am

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

its all system balance
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Heat delivery issue

PostBy: waldo lemieux On: Wed Jan 22, 2014 8:28 am

Sting

Tried the turning up the temp thing,unfortunately Ive never used it in 13 ys and it is seized. And I dont 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
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20

Re: Heat delivery issue

PostBy: Sting On: Wed Jan 22, 2014 8:32 am

What "thing" are you turning up???

tempering valve?

plain valve?

boiler?
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Heat delivery issue

PostBy: Sting On: Wed Jan 22, 2014 8:34 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
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Heat delivery issue

PostBy: waldo lemieux On: Wed Jan 22, 2014 8:50 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:
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20

Re: Heat delivery issue

PostBy: Sting On: Wed Jan 22, 2014 8:54 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
Sting
 
Other Heating: BurnHAM=NG-gas

Re: Heat delivery issue

PostBy: kevinjohn On: Wed Jan 22, 2014 5:11 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.
kevinjohn
 
Stoker Coal Boiler: 1963 efm 350 coal stoker
Coal Size/Type: buck
Stove/Furnace Make: efm
Stove/Furnace Model: 350 w/auto stoker

Re: Heat delivery issue

PostBy: Lightning On: Wed Jan 22, 2014 5:28 pm

Can you increase the temperature supplying the zone while maintaining flow volume? That should increase btu output from the zone, shouldn't it?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Heat delivery issue

PostBy: waldo lemieux On: Wed Jan 22, 2014 6:37 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 dont 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 :(
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20

Re: Heat delivery issue

PostBy: Rob R. On: Wed Jan 22, 2014 7:53 pm

What model circulator are you using right now?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Heat delivery issue

PostBy: waldo lemieux On: Wed Jan 22, 2014 8:10 pm

Rob,

bell and gossett nrf-22
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20

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