Who burns year-round?

Re: Who burns year-round?

PostBy: Rob R. On: Sun May 01, 2011 7:42 am

The boiler idles fine. It seems to me that there is lag time from idle to full fire at its current feed setting, maybe all feed settings. So if I use enough hot water to get to full fire, then stop using hot water, that is when it dumps heat. Also at that time the timer could come on feeding the fire needlessly.


What is your dump zone aquastat set at?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Who burns year-round?

PostBy: Machinist On: Sun May 01, 2011 8:07 am

Dump zone is set at 220.
Machinist
 
Stoker Coal Boiler: Keystoker KAA-2
Coal Size/Type: Rice
Other Heating: None

Re: Who burns year-round?

PostBy: coalmeister On: Sun May 01, 2011 11:47 am

I am going to put a tee in my pressure relief port (ahead of the pr) and run a line (with a pump inline) to the extra hole in the coil faceplate to give it a continuous blast of hot water into the coil area as I am not getting much temp drop during hot water use.

A Taco 007 pump is the cheapest I can find which is way over kill through the half inch port in the faceplate. Maybe I can find a smaller one or dial back the the speed of the Taco with a paddle fan controller. Or I may just go with a remote switch and mount the remote next to the shower. The Taco is .71 A (85 watts) Yeah, I have too much time on my hands, :) as I don't think it is ever going to stop raining here!


http://cgi.ebay.com/Wireless-Remote-Control-Power-Outlet-On-Off-Switch-100-/300545142729?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D5%26po%3DLVI%26ps%3D63%26clkid%3D8846144049487721003
This link is broken, either the page no longer exists or there is some other issue like a typo.
coalmeister
 
Stove/Furnace Make: Alaska 140 Furnace -sold
Stove/Furnace Model: Harmon VF3000 -sold

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Re: Who burns year-round?

PostBy: Rob R. On: Sun May 01, 2011 12:08 pm

If your coil seems ineffective, I would check it for hard water deposits...that is the most common problem.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Who burns year-round?

PostBy: coalmeister On: Sun May 01, 2011 5:07 pm

Rob, My coil is new, right out of the box
coalmeister
 
Stove/Furnace Make: Alaska 140 Furnace -sold
Stove/Furnace Model: Harmon VF3000 -sold

Re: Who burns year-round?

PostBy: Rob R. On: Mon May 02, 2011 9:08 am

I just went back and re-read your post that the boiler temp. doesn't drop quickly when drawing water through the coil. Do you get satisfactory amounts of domestic hot water?

With ~50 gallons in the pressure vessel and a 4gpm coil, it will take some time for the boiler temperature to start dropping...if you really want to see how effective the coil is, measure the inlet and outlet temperatures at a known flow rate and boiler temperature.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Who burns year-round?

PostBy: coalmeister On: Tue May 03, 2011 4:11 pm

Rob, I seem to get enough DHW only at 180-190 degree boiler setting. It seems like a pretty small coil, the outdoor wood boiler guys have coils 2-3 feet long, or so they say...they may be just bragging about how big theirs is :D
coalmeister
 
Stove/Furnace Make: Alaska 140 Furnace -sold
Stove/Furnace Model: Harmon VF3000 -sold

Re: Who burns year-round?

PostBy: Rob R. On: Tue May 03, 2011 4:29 pm

I agree that it sounds like the tankless coil just doesn't have enough surface area to do the job with moderate boiler temps. I think most tankless coils have their rated output measured with the boiler at 180-200 degrees. Either keep your boiler at a steady 180 or look into a storage tank/indirect.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Who burns year-round?

PostBy: MATTHEW D. On: Fri May 06, 2011 7:53 am

This is a great topic markviii! I'm starting to get calls on outfire problems from some people. I'll let you know about some of the situation I come across. I have a problem myself with my AA 130. I have tried every ajustment in the manual and still have outfires in the summer months. I switched to buckweat for the summer, just curious how it will burn and if it helps. My indirect hot water heater is not connected to my triple aquastate. My first change is to connect it to my triple aquastate so my stoker turns on every time it calls for heat. That should help. We do use a lot of hot water. If I still have problems I may install a draft inducer :?: . I like to hear from other axeman guys about runing theirs during the summer and any problems and solutions.

Matthew
MATTHEW D.
 
Stove/Furnace Make: AXEMAN-ANDERSON & EFM
Stove/Furnace Model: 130 & 900 x 2

Re: Who burns year-round?

PostBy: AA130FIREMAN On: Fri May 06, 2011 8:18 am

MATTHEW D. wrote: I have tried every ajustment in the manual and still have outfires in the summer months. Matthew
I leave the anthrastat alone, if you do turn down the anthrastat, I only do 2 degrees at a time and let it go a day or 2.
MATTHEW D. wrote: I switched to buckweat for the summer, just curious how it will burn and if it helps.Matthew
Less heat and less draft, I just run pea.
MATTHEW D. wrote: My indirect hot water heater is not connected to my triple aquastate. My first change is to connect it to my triple aquastate so my stoker turns on every time it calls for heat. Matthew
That should help, what temp do you keep the hwh at ?
AA130FIREMAN
 
Stove/Furnace Make: axeman anderson
Stove/Furnace Model: 130 anthratube

Re: Who burns year-round?

PostBy: MATTHEW D. On: Fri May 06, 2011 8:40 am

It's a weil-mclain 35 gal and the settings are just low-very hot. I keep it in the middle. I understand what you are saying about more heat more draft, good point. Just want to see what results I get from the buck. You never know to you try, It might be better it might be worse. I'll let you know how it works for me. Thanks for the input.
MATTHEW D.
 
Stove/Furnace Make: AXEMAN-ANDERSON & EFM
Stove/Furnace Model: 130 & 900 x 2

Re: Who burns year-round?

PostBy: Rob R. On: Fri May 06, 2011 6:05 pm

Hey Matt - I have a Weil McLain indirect about the same size, I just run it at the "factory setting" mark. I have mine run off a zone with an old Honeywell R845 relay, so there is an end switch to use for a heat call signal. Without the end switch hooked up the stoker would only run when the low limit was reached...hot water production was less than impressive.

As for the Axeman outfires, please post the settings you are currently using (aquastats, anthrastat, timer). I usually recommend going back to the manual's recommendations and adjusting from there. I would run enough of a timer cycle to keep the boiler around 180 degrees, this will help your draft and it will recover faster when the indirect calls for heat. Buck will make the boiler a little less responsive, so running it "warm" off the timer should improve response.

That Axeman should hold a fire for a long time with good chimney draft, so check your cleanout door for a tight fit (or tape it off), tape the stovepipe seams, and check the clearance between the fire port door and the boiler.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Who burns year-round?

PostBy: coalmeister On: Fri May 06, 2011 8:35 pm

markviii wrote:I agree that it sounds like the tankless coil just doesn't have enough surface area to do the job with moderate boiler temps. I think most tankless coils have their rated output measured with the boiler at 180-200 degrees. Either keep your boiler at a steady 180 or look into a storage tank/indirect.



I am pondering how Highlander is getting by at 140 degrees w/o a tank and I can't. :?
coalmeister
 
Stove/Furnace Make: Alaska 140 Furnace -sold
Stove/Furnace Model: Harmon VF3000 -sold

Re: Who burns year-round?

PostBy: blrman07 On: Sat May 07, 2011 7:43 am

During the summer starting at Easter I run my stoker rice burning boiler at 130/140/ with a 10 differential and we have more than enough hot water. I have the boiler timer pins set to start the boiler every 7 minutes on 3 pins.
blrman07
 
Hand Fed Coal Boiler: Bucket a Day
Hot Air Coal Stoker Furnace: Leisure Line Econo 1 stove
Coal Size/Type: Rice in the LL and anything that will fit in the Bucket a Day. It's not fussy.

Re: Who burns year-round?

PostBy: MATTHEW D. On: Sat May 07, 2011 10:05 am

markviii wrote:Hey Matt - I have a Weil McLain indirect about the same size, I just run it at the "factory setting" mark. I have mine run off a zone with an old Honeywell R845 relay, so there is an end switch to use for a heat call signal. Without the end switch hooked up the stoker would only run when the low limit was reached...hot water production was less than impressive.

As for the Axeman outfires, please post the settings you are currently using (aquastats, anthrastat, timer). I usually recommend going back to the manual's recommendations and adjusting from there. I would run enough of a timer cycle to keep the boiler around 180 degrees, this will help your draft and it will recover faster when the indirect calls for heat. Buck will make the boiler a little less responsive, so running it "warm" off the timer should improve response.

That Axeman should hold a fire for a long time with good chimney draft, so check your cleanout door for a tight fit (or tape it off), tape the stovepipe seams, and check the clearance between the fire port door and the boiler.

Thanks markviii. I have a taco SR506 relay w/ an end switch. I states to connect to "tt" on boiler. I will run a line to the "tt" on my triple aquastate. The manual isn't stating if it is 24 or 120 volt. What size wire should I run? Got to run to a t-ball game, Talk to ya later.
Matthew
MATTHEW D.
 
Stove/Furnace Make: AXEMAN-ANDERSON & EFM
Stove/Furnace Model: 130 & 900 x 2

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