AA130 under heavy load.
- Lightning
- Site Moderator
- Posts: 14658
- Joined: Wed. Nov. 16, 2011 9:51 am
- Location: Olean, NY
- Stoker Coal Boiler: Modified AA 130
- Coal Size/Type: Pea Size - Anthracite
If it were me, the simple and easy way seems to be to use the the triple aquastat to cut the circulator on low water temp like hotblast suggested.
- hotblast1357
- Member
- Posts: 5657
- Joined: Mon. Mar. 10, 2014 10:06 pm
- Location: Peasleeville NY
- Stoker Coal Boiler: 1984 Eshland S260 coal gun
- Coal Size/Type: Lehigh anthracite pea
- Other Heating: air source heat pump, oil furnace
That would be done via trvs at each radiator.lsayre wrote: ↑Sun. Feb. 09, 2020 8:19 amI haven't researched how they do it, but I believe that the standard means of home heating in Europe is to keep water minimally but continuously flowing through the homes various heat emitters. This was the original reason for the invention of the variable speed ECM circulator. And why such circulators came about in Europe long before they ever came to America.
- hotblast1357
- Member
- Posts: 5657
- Joined: Mon. Mar. 10, 2014 10:06 pm
- Location: Peasleeville NY
- Stoker Coal Boiler: 1984 Eshland S260 coal gun
- Coal Size/Type: Lehigh anthracite pea
- Other Heating: air source heat pump, oil furnace
- nepacoal
- Member
- Posts: 1696
- Joined: Wed. Nov. 21, 2012 7:49 am
- Location: Coal Country
- Stoker Coal Boiler: Keystoker KAA-4 / "Kelly" and an EFM 520 at my in-laws
- Hand Fed Coal Boiler: Harman SF-260 - retired
- Coal Size/Type: Buck
This plus a simple boiler bypass would be my choice... If money were no object I'd go with the thermostatic bypass valve on a system bypass in conjunction with P/S plumbing
Last edited by nepacoal on Sun. Feb. 09, 2020 9:57 am, edited 2 times in total.
-
- Member
- Posts: 42
- Joined: Fri. Jan. 24, 2020 4:57 pm
- Location: Rapid River, MI
- Other Heating: wood
I agree, installing something like a Danfoss mixing valve will keep excessively cold water from entering the boiler. The water just keeps looping until it's up to your desired temp before it heads to your emitters. Wood burning boilers use them a lot to keep the firebox walls from corroding due to condensation from the cold water entering the boiler on fire-up. Just my 2 cents...LOL
Pat
-
- Member
- Posts: 788
- Joined: Tue. Nov. 13, 2012 9:05 am
- Stoker Coal Boiler: 1948 International boiler, EFM S-20 stoker
- Coal Size/Type: Buck,
Had to run up to Vt. for work so missed all of this discusion. Lots of ways to skin a cat for sure.
After taking 2 undersized boiler out of cold, uncomfortable houses I can say, size matters.... a lot.
And a larger boiler is only going to eat as much coal as you need for heat. The only down side is they are heavy, and harder to find when you want one.
Both houses were large. Both always cold..... With bigger than needed boilers installed,the temps are steady, and plenty of DHW.
Dave
After taking 2 undersized boiler out of cold, uncomfortable houses I can say, size matters.... a lot.
And a larger boiler is only going to eat as much coal as you need for heat. The only down side is they are heavy, and harder to find when you want one.
Both houses were large. Both always cold..... With bigger than needed boilers installed,the temps are steady, and plenty of DHW.
Dave
-
- Member
- Posts: 6515
- Joined: Sun. Feb. 10, 2008 3:48 pm
- Location: Cape Cod, MA
- Stoker Coal Boiler: want AA130
- Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
- Coal Size/Type: Pea/Nut/Stove
Use what ya got...
A surge tank that has primary secondary built in..
And the controls setup to maintain higher temps...
Will do wonders in the shoulder seasons...
http://bellgossett.com/hydronic-plumbing-accessor ... literature
A surge tank that has primary secondary built in..
And the controls setup to maintain higher temps...
Will do wonders in the shoulder seasons...
http://bellgossett.com/hydronic-plumbing-accessor ... literature
-
- Member
- Posts: 218
- Joined: Thu. Dec. 13, 2018 8:51 pm
- Stoker Coal Boiler: Axeman Anderson 130
- Other Heating: Outdoor wood furnace oil boiler
We had an interesting occurrence happen today.Our new load of coal bridged the auger and I was out of town for the day. Anyway the furnace burned itself dry of coal so to speak. All three apartments were below 60 and it was windy and 28 outside. Pretty sure this 130 can handle anything at this point! Took some time to get a full burn again and some more to climb back up to 180 but it fully handled it and brought them all back up to the set temperature at the thermostats. It was impressive.
- dbsuz05
- Member
- Posts: 191
- Joined: Thu. Nov. 28, 2013 8:09 am
- Location: Central Pennsylvania
- Stoker Coal Boiler: Axeman Anderson
- Hand Fed Coal Boiler: Burnham 23"
Wet coal doesn’t work for axemans!
I was thinking of something for your heat controls. Being you said so much cold water comes back to boiler from the apartments. What if you turn the anticipators on the thermostats alittle closer. So that thermostats detect just one degree of room temp? Most times they are set to about 2 degree swing up or down. If thermostats check for heat more often in turn I would think your water wouldn’t be as cold when it returns to boiler. Just a simple thought.
I was thinking of something for your heat controls. Being you said so much cold water comes back to boiler from the apartments. What if you turn the anticipators on the thermostats alittle closer. So that thermostats detect just one degree of room temp? Most times they are set to about 2 degree swing up or down. If thermostats check for heat more often in turn I would think your water wouldn’t be as cold when it returns to boiler. Just a simple thought.
-
- Member
- Posts: 2365
- Joined: Sun. Mar. 25, 2007 8:41 pm
- Location: Ithaca, New York
- Stoker Coal Boiler: Keystoker KAA-4-1 dual fuel boiler
- Hand Fed Coal Boiler: former switzer CWW100-sold
- Coal Size/Type: rice
- Other Heating: kerosene for dual fuel Keystoker/unused
From What I remember of Mr. Holohans writing about when he was visiting a trade show in Europe he stated that the heating regulations in Germany mandated that the hot water heating systems operated at no higher than 160 degrees at all times. They do not need higher temperatures since the homes and businesses there are highly insulated buildings down to the smallest home. Apparently steam heating is no longer allowed in residences there due to concerns from burns.
-
- Member
- Posts: 218
- Joined: Thu. Dec. 13, 2018 8:51 pm
- Stoker Coal Boiler: Axeman Anderson 130
- Other Heating: Outdoor wood furnace oil boiler
It seems I’m that rare case where I actually need a timer to keep this running during this weather we have been having. Should I just go with whatever AA is selling or is there something better. I got tired of searching as I ended up reading post after post of it not being needed.