AHS130 Outta Control

dchartt · By: **dchartt** On: Wed Nov 16, 2011 1:55 pm

Ok heres my setup, the boiler is located approx. 130 feet from my house, the pump is in my basement, its setup to run even if the boiler drops below the operating temp. I have 6 inch flue pipe(against my will). Im burning around 100lb a day and its nowhere close to being cold here. Also have flyash gathering in my barometric, ordered a manometer yesterday so im currently without one. I need help knowing what has to go and what can just be altered or left alone

steamup · By: **steamup** On: Wed Nov 16, 2011 2:13 pm

First impression is why is the lo on the aquastat set and 190 and the hi set at 160. This is backwards unless you want to maintain a very hot boiler all of the time. A 190 degree hot boiler will create a lot of standby loss.

Second, A schematic might help more to analyize the problem. I am not sure what the three way valve is for on the boiler.

Third, think about installing the flue like this: AHS S130 : Barometric Damper and Flue diameter question

A quick change with some 5" pipe and elbow, 6" tee and a reducer. Reuse the barometric. Then set your draft with a manometer.

I don't see any insulation on the piping around the boiler. This will create heat loss.

Running a control wire between the house and boiler to cycle the boiler on when the pump calls for heat will reduce the standby losses of the boiler.

Bob · By: **Bob** On: Wed Nov 16, 2011 2:30 pm

AHS recommends that the barometric damper be located as close to the chimney as possible (hence as far away from the boiler as possible.)

On my boiler the dual aquastat is used to control the high temp dump zone. A draft that is too high can cause continuous firing and result in the dump zone being activated frequently--or even continuously.

I have my boiler in an out building with the pipe run between coal boiler and connection inside the house about 135 feet with about 75 feet actually underground between buildings.

I installed a control that has a remote sensor located at the coal boiler so that I can do an auto switch over to the oil boiler if the coal boiler drops below a set temp. That setup could also be used in different ways and I can provide info on the control if that would be helpful.

I have 6" smoke pipe and I was told by AHS that 6" is fine.

I also have the circulator pump located inside the house rather than in the outbuilding and I don't see that it makes a lot of difference where the pump is located.

I run the circulating pump between the coal boiler and oil boiler full time--I found it didn't make a significant difference in coal consumption and it reduced temp overshoot and cold shock.

Bob · By: **Bob** On: Wed Nov 16, 2011 2:43 pm

It appears to me that the mixing valve is installed incorrectly. It appears to me that the output of the mixing valve is going into the house while I assume that the intention is that the output of the mixing valve will temper the cold return to the boiler.

Rob R. · By: **Rob R.** On: Wed Nov 16, 2011 2:44 pm

Steamup, that Hi/Lo control doesn't work like you would expect. Based on what others have posted the 4006A aqaustat installed in the top-right corner of his boiler should control the operating temperature...the "Hi" side of the pictured control is Normally Closed, and serves as a second high limit control. The "Lo" side of the pictured control is Normally Open, and can be used to activate a dump zone. As for the mixing valve, I think he installed that to protect the pex tubing.

Read the last two pages of this thread: AHS S130 Coal Gun : First fire

dchartt, what is the L4006A aquastat mounted in the top-right corner of your boiler set at? From the pictures you posted, it looks like you have some pretty large piping in the home's heating system. You may need to throttle the output of that Taco circulator so the S130 doesn't get slammed with cold water.

steamup · By: **steamup** On: Wed Nov 16, 2011 3:03 pm

markviii wrote:Steamup, that Hi/Lo control doesn't work like you would expect. Based on what others have posted the 4006A aqaustat installed in the top-right corner of his boiler should control the operating temperature...the "Hi" side of the pictured control is Normally Closed, and serves as a second high limit control. The "Lo" side of the pictured control is Normally Open, and can be used to activate a dump zone. As for the mixing valve, I think he installed that to protect the pex tubing.

Read the last two pages of this thread: AHS S130 Coal Gun : First fire

dchartt, what is the L4006A aquastat mounted in the top-right corner of your boiler set at? From the pictures you posted, it looks like you have some pretty large piping in the home's heating system. You may need to throttle the output of that Taco circulator so the S130 doesn't get slammed with cold water.

Ok looking at the pictures more closely, there is no wiring on the lo side. It appears a separate strap on aquastat was used for the dump valve..

The Hi side set at 160 is pretty low for a high limit control.

lsayre · By: **lsayre** On: Wed Nov 16, 2011 3:12 pm

Perhaps the L4006 and the Hi side of the L4081B have been reversed and the L4006 is set at the higher temperature of the two? I initially made this very mistake based on how they were "incorrectly" labeled, as initially I had my Hi side of the L4081B set to 180 and my L4006 set at 200.

Now (for the past month) I have my L4006 aquastat set at 180 degrees, and the Hi side of my L4081B dual aquastat set at 200 degrees.

I had an out-fire within a day and a half of first fire when I had them initially set wrong (reversed). I haven't had a problem since switching them around.

lsayre · By: **lsayre** On: Wed Nov 16, 2011 3:23 pm

My flue pipe is 6" all the way. It transitions up from 5" right at the boiler. But due to the close proximity of my boiler to my chimney, my entire stack run is only about 6 feet of pipe from boiler to chimney.

Update: I just got home from work and measured it, and my entire stack run is (on center line) only 50" long from boiler flange to chimney flange. A tad over 4 feet.

ValterBorges · By: **ValterBorges** On: Wed Nov 16, 2011 7:42 pm

why your stat at 160 what temp does your water range between?

dchartt · By: **dchartt** On: Wed Nov 16, 2011 8:16 pm

boiler kicks on at 150 and shuts off at 160, my chimney consists of double stainless insulated flue pipe all the way outside, mark i believe it is set at 180 or 190 i will go check

dchartt · By: **dchartt** On: Wed Nov 16, 2011 8:19 pm

boiler water temp or temp inside my plumbing?

dchartt · By: **dchartt** On: Wed Nov 16, 2011 8:21 pm

my mixing valve was set up to control overheating my pex ran underground

Rob R. · By: **Rob R.** On: Wed Nov 16, 2011 8:28 pm

Try setting your "HI" control (last picture you posted) at 200. Your dump zone aquastat can also be set at 200. Set the L4006A I asked about earlier to 180 degrees. Give that a try, and post back.

dchartt · By: **dchartt** On: Wed Nov 16, 2011 9:32 pm

ok, just discovered i have a outfire also, just got it all cleaned up gna start it up now and adjust everything to what you said

dchartt · By: **dchartt** On: Wed Nov 16, 2011 9:35 pm

the hi stat is my operating temp, you really want that set all the way to 200?...not second guessing you just making sure

AHS130 Outta Control

AHS130 Outta Control

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