I bought a house recently that had Honeywell boiler in it. That boiler
has L6081 A Triple Aquastat. It has "LOW", "HIGH" and "DIFF" controls.
My question is, what is the purpose of that "DIFF" control with the
marks from 10 to 25? Any help is greatly appreciated
The LOW limit controls the circulator pump. The DIFF is the
differential between ON and OFF points on the LOW dial.
A larger DIFF setting will prevent the circ pump from
cycling on and off frequently.
The HIGH limit controls the boiler max temp. Its differential
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