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Old 01-28-2011, 08:47 PM   #1
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Boiler water feed and aquastat question


Is there any reason why the fresh water feed to the boiler is fed with hot water?

The aquastat shuts the boiler off at 180 degrees and turns it back on at 170 degrees. Isn't that a small temperature swing? Would it help anything to adjust the aquastat to shut the boiler off at 190 or 200 degrees and maybe turn it back on at 140 or 150?

Thanks for the help.

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Old 01-29-2011, 09:58 AM   #2
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Boiler water feed and aquastat question


Quote:
Is there any reason why the fresh water feed to the boiler is fed with hot water?
Nope,... Normally it's from the Cold line...
Quote:
The aquastat shuts the boiler off at 180 degrees and turns it back on at 170 degrees. Isn't that a small temperature swing? Would it help anything to adjust the aquastat to shut the boiler off at 190 or 200 degrees and maybe turn it back on at 140 or 150?
Nope again, as far as I know...
Depending on what your doin' with the hot water, 190+ is probably Too Hot...
I do know 140 is Too Cold to send back to the boiler...
It'll condensate, 'n Rot out the boiler...

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Old 01-29-2011, 05:37 PM   #3
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Boiler water feed and aquastat question


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Originally Posted by Bondo View Post
Nope,... Normally it's from the Cold line...


Nope again, as far as I know...
Depending on what your doin' with the hot water, 190+ is probably Too Hot...
I do know 140 is Too Cold to send back to the boiler...
It'll condensate, 'n Rot out the boiler...
The boiler is running a single zone base board heat. I just thought a 10 degree swing in water temperature a little small. And I figured just as long as I didn't turn the aquastat up to where the water hit 212 degrees It would heat the house better.
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Old 01-29-2011, 07:04 PM   #4
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Boiler water feed and aquastat question


The hotter the water. The larger your heating bill is. 10 degree swing is common for many aquastats.
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Old 01-29-2011, 07:24 PM   #5
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Boiler water feed and aquastat question


Thank you all for the help. I will leave the aquastat alone.
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