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pressuretrol on burnham V9a

lilzanelilzane Posts: 2Member
hello my Burnham v9a has two pressuretrol boxes on it, would like to know where setttings should be. pressuretrol on left has diff @ 2.5psi and main @ 5psi. right pressuretrol only has main which is set @ 7psi
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Comments

  • Jamie HallJamie Hall Posts: 4,032Member ✭✭✭
    Try...

    changing the left one to a differential of 1 psi and a cutin of 0.5 psi if it is additive, or a cutout of 1.5 psi if it is subtractive.  Leave the other one at 7.
    Jamie



    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.



    Hoffman Equipped System (all original except boiler), Weil-McClain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
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