Central Boiler FORGE 3500 Outdoor Coal Boiler

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Lightning
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Posts: 10201
Joined: Wed. Nov. 16, 2011 9:51 am
Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Nut/Stove Size Mix
Location: Olean, NY

Post By: Lightning » Sat. Dec. 08, 2018 1:21 pm

Rut roh. It's starting to curl upward... I was afraid that might happen.

It's currently 21 degrees.
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lsayre
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Posts: 17006
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Sat. Dec. 08, 2018 1:25 pm

Are you afraid of another excursion to 205 degrees?

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lsayre
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Posts: 17006
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Sat. Dec. 08, 2018 1:31 pm

I'm going to take a stab at this and guess that at a mean daily temperature of 21 degrees it is burning 126 lbs. of anthracite per day (while hoping I'm wrong). And that his initial 'stab guess' burn rate is 2.86 lbs. per HDD. Do you know what his current daily feeding pounds are, and what the daily mean temperatures have been for your area recently?

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Lightning
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Posts: 10201
Joined: Wed. Nov. 16, 2011 9:51 am
Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Nut/Stove Size Mix
Location: Olean, NY

Post By: Lightning » Sat. Dec. 08, 2018 1:38 pm

A couple things to consider. The heat load doesn't change according to the outside temps. He's putting in two buckets a day to maintain the coal bed depth.... and yes I'm fearing it's going to hit 200 and close the combustion air completely that is currently set at 10% driven by chimney draft.

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Lightning
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Posts: 10201
Joined: Wed. Nov. 16, 2011 9:51 am
Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Nut/Stove Size Mix
Location: Olean, NY

Post By: Lightning » Sat. Dec. 08, 2018 1:39 pm

The house temp sways with the outdoor temps. BTU fed to the house is constant.

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lsayre
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Posts: 17006
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Sat. Dec. 08, 2018 1:53 pm

2 buckets per day is way better than the 3 buckets per day that I just guessed. If you are talking 5 gallon plastic pails, lets call it about 83 lbs. per day. That is ~3.46 lbs. per hour, or an average input BTUH of ~42,400.

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Lightning
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Posts: 10201
Joined: Wed. Nov. 16, 2011 9:51 am
Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Nut/Stove Size Mix
Location: Olean, NY

Post By: Lightning » Sat. Dec. 08, 2018 1:57 pm

I saw the buckets, they aren't completely full. I'd call them 35 pounds each.

The temp is creeping upward, it's at 196.1 now. We have the pulse set at 1 minute every hour. The fire is just too healthy.

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lsayre
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Posts: 17006
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Sat. Dec. 08, 2018 2:04 pm

Wow, that's only about 35,700 BTUH. The burn rate seems pretty meager. Is the house currently warm?


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McGiever
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Posts: 7992
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: RICE,PEA,NUT,STOVE /ANTHRACITE and EGG / BIT
Other Heating: Ground Source Heat Pump and some Solar
Location: Junction of PA-OH-WV

Post By: McGiever » Sat. Dec. 08, 2018 2:07 pm

And only 350K boiler which has constant meager output irregardless of outdoor temps.

What is going to happen when it hits single digits temperature outdoors?
Will it suffice to just continue to sit and marvel at graphs and charts while this family freezes?

The gifts of beer and such maybe for putting these folks up till spring time comes around⛺️

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Lightning
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Posts: 10201
Joined: Wed. Nov. 16, 2011 9:51 am
Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Nut/Stove Size Mix
Location: Olean, NY

Post By: Lightning » Sat. Dec. 08, 2018 2:15 pm

lsayre wrote:
Sat. Dec. 08, 2018 2:04 pm
Wow, that's only about 35,700 BTUH. The burn rate seems pretty meager. Is the house currently warm?
Mid 60's

Point taken Mac. I wish I could indulge with fixing the heat distribution but time is tight right now....

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McGiever
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Posts: 7992
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: RICE,PEA,NUT,STOVE /ANTHRACITE and EGG / BIT
Other Heating: Ground Source Heat Pump and some Solar
Location: Junction of PA-OH-WV

Post By: McGiever » Sat. Dec. 08, 2018 2:26 pm

Maybe get this fellow a copy of Holohan's Pumping Away.

Picture is worth one thousand words.
Last edited by McGiever on Sat. Dec. 08, 2018 2:28 pm, edited 1 time in total.

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hotblast1357
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Posts: 4603
Joined: Mon. Mar. 10, 2014 10:06 pm
Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: oil furnace
Location: Peasleeville NY

Post By: hotblast1357 » Sat. Dec. 08, 2018 2:27 pm

So... the boiler can’t warm the house with a constant 24/7 circulation through the one loop of baseboard?

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lsayre
Member
Posts: 17006
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Sat. Dec. 08, 2018 2:28 pm

If it is eating a steady 35,700 BTUH, it is likely only delivering a steady ~25,000 BTUH into the house. No wonder the house is only holding at about 65 degrees. At roughly -10 degrees outside things are potentially going to start freezing inside this house.
Last edited by lsayre on Sat. Dec. 08, 2018 2:30 pm, edited 1 time in total.

User avatar
McGiever
Member
Posts: 7992
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: RICE,PEA,NUT,STOVE /ANTHRACITE and EGG / BIT
Other Heating: Ground Source Heat Pump and some Solar
Location: Junction of PA-OH-WV

Post By: McGiever » Sat. Dec. 08, 2018 2:29 pm

There is an inevitable train wreck acoming...

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hotblast1357
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Posts: 4603
Joined: Mon. Mar. 10, 2014 10:06 pm
Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: oil furnace
Location: Peasleeville NY

Post By: hotblast1357 » Sat. Dec. 08, 2018 2:36 pm

For now can’t the water temp be raised to say, 190 or even 195, and raise the shut off temp to like 210? Getting the baseboard a little hotter.


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