Aquastat Differential?


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Old 10-13-13, 05:45 PM
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Aquastat Differential?

Is there a rule of thumb for setting the manual differential? Gas-fired boiler, warm start, 180-deg setpoint, L4006A aquastat.
 
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Old 10-13-13, 07:16 PM
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I don't know of one.

I prefer a somewhat wider differential. More cooling of boiler between burner cycles, longer burn times.

Guess just set it wide enough that you don't short cycle.
 
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Old 10-13-13, 07:26 PM
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Yes warm start different then cold start IMO. Cold set as wide as you can IMO.

Warm....Well its warm for domestic water heating no? If indirect make cold.... Coil a different story....
 
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Old 10-13-13, 07:51 PM
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Well it's warm for domestic water heating no?
No, the hot-water boiler is just for space heating, not water heating - the boiler has been that way for 52 years, and at this point, I don't want to change it to cold start. I shut off the boiler during the summer. I have a separate stand-alone gas-fired water heater, like most of us here do.
 
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Old 10-13-13, 08:14 PM
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I shut off the boiler during the summer.
If its been warm start for 52 yrs and you shut it off in the summer and it dont leak.....Why not make it cold start?????

Am I missing something?
 
 

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