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Re: Honeywell Aquastat L8148A - Lowering setpoints


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Posted by Mr. Bag-O-Beans on March 21, 2009 at 13:02:48:

In Reply to: Re: Honeywell Aquastat L8148A - Lowering setpoints posted by tk03 on March 19, 2009 at 15:05:58:

: You can lower it but why would you want to. It will extend out the run and recovery time. The indirect recovery time is designed around 180 - 200 boiler water.

I figured that the boiler would sit at 140 rather than 180, because once my boilermate is satified, let's say after AM showers, etc. then the boiler cools and in point it is just wasted heat until the boilermate "calls" again later on in the day- around bath time for the little ones.

So I'm thinking why not have the boiler go to 140 then shut off , to be more economical.

However I have since found out that the boiler is kept hot to keep the flue gases from being lowered below the "Dewpoint"- usually around 275 deg. which will cause sooting and inefficiencies in the long run.


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