Maintenance on my AA 260

Re: Maintenance on my AA 260

PostBy: lzaharis On: Sun Dec 04, 2016 1:51 am

Hello Rick,

I hope the Domestic Hot Water Coil exchange surgery went well.
Did they ship a new gasket with the correct Domestic Hot Water Coil?
I guess I have been lucky with mine as I have no drips at all as the coil
was installed in their factory after the shell was welded together
I have been averaging about 60 Pounds of rice coal every 18 hours
or so in the KAA-4-1.

The timer motor in the Intermatic 30 minute timer died a slow death and I replaced the timer motor last week which explains a lot about how the boiler was running and having so many outfires.
I have 2 minutes/8 pins at 0 time and 9 pins at 15 minutes on the timer, the ash band is 1 inch wide, The burning coals are 3-4 inches long and the flame is perfect for the hold fire and the heat call fires.
The new Honeywell controls being the L8214L1011 Horizontal Triple Aquastat is managing the KAA-4-1 temperatures of 120 low 150 high with a 10 degree differential very well with 14-20 P.S.I.G.
The stoker pusher plate is backed off to 9 threads and separate B+G BullDog RB-122-E Dog Low Water Cut Off is working properly and protecting the boiler.

SO I have a Happy warm cat, Happy warm dog, Happy Spousal Unit walking on warm floors.
I hope to change the baseboard and install radiators; StokerDon has had me drooling and thinking about cast iron radiators for a while for even more thermal mass, more water using the square European copper pipe to eliminate the copper pipe under the doors and the concrete someday.

Happy Holidays to you and your family Rick
lzaharis
 
Stoker Coal Boiler: Keystoker KAA-4-1 dual fuel boiler
Coal Size/Type: rice
Other Heating: kerosene for dual fuel Keystoker

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Re: Maintenance on my AA 260

PostBy: Rick 386 On: Mon Dec 05, 2016 10:49 pm

Leon and follow coal burners,

I did the coil switch but still had an increasing pressure problem. So I figured it must be the manual fill valve. So this past weekend I replaced it. Still waiting to see if that fixed the issue.

But other family issues has put this on the back burner so to speak.

Rick
Rick 386
 
Stoker Coal Boiler: AA 260 heating both sides of twin farmhouse
Hot Air Coal Stoker Stove: LL Hyfire II w/ coaltrol in garage
Coal Size/Type: Pea in AA 260, Rice in LL Hyfire II
Other Heating: Gas fired infared at work

Re: Maintenance on my AA 260

PostBy: Rick 386 On: Sun May 07, 2017 10:52 pm

So the AA 260 has been performing great through the heating season.

Now that we are getting into the DHW only season, what are the settings that I should be using on the 8124c aquastat ??


The old system only used 2- L4006 aquastats. I'm not so sure where I need to set this using the differential. Right now we seem to be getting a lot of unburned coal in the ashes.




Rick
Rick 386
 
Stoker Coal Boiler: AA 260 heating both sides of twin farmhouse
Hot Air Coal Stoker Stove: LL Hyfire II w/ coaltrol in garage
Coal Size/Type: Pea in AA 260, Rice in LL Hyfire II
Other Heating: Gas fired infared at work

Re: Maintenance on my AA 260

PostBy: coaledsweat On: Sun May 07, 2017 11:15 pm

I would avoid going under 160° for the high end. You want to keep O2 out of the water.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Maintenance on my AA 260

PostBy: hotblast1357 On: Mon May 08, 2017 5:16 am

If there are no leaks and he is not adding fresh water how does the o2 form?
hotblast1357
 
Stoker Coal Boiler: 1984 Eshland S260
Hand Fed Coal Boiler: 1990 New Yorker WC 90
Coal Size/Type: anthracite pea
Other Heating: oil furnace

Re: Maintenance on my AA 260

PostBy: Rob R. On: Mon May 08, 2017 6:02 am

Rick, I would start with whatever Axeman has in the manual. I think it is 165/190 with a 10 degree differential. A timer would probably help with the unburned coal also.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: Maintenance on my AA 260

PostBy: coaledsweat On: Mon May 08, 2017 6:40 am

hotblast1357 wrote:If there are no leaks and he is not adding fresh water how does the o2 form?

It doesn't form, it is drawn in. Good luck stopping it with a piece of pipe, oxygen will diffuse through metals seeking equalibrium. The O2 barrier on PEX does not stop it, it just slows it down.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Maintenance on my AA 260

PostBy: Rick 386 On: Wed May 10, 2017 7:52 am

Thanks CS and Rob.


Just got slammed at work and haven't been able to post a reply to your suggestions.




Rick
Rick 386
 
Stoker Coal Boiler: AA 260 heating both sides of twin farmhouse
Hot Air Coal Stoker Stove: LL Hyfire II w/ coaltrol in garage
Coal Size/Type: Pea in AA 260, Rice in LL Hyfire II
Other Heating: Gas fired infared at work

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