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Aquastat Differential

tomstcyr
tomstcyr Member Posts: 1
in Oil Heating
I have a cold start boiler with a Honeywell L8148c Aquastat. The built in 15 degree differential seems to cause the boiler to cycle frequently (not quite a "short cycle" but about every 2-3 min on a cold day). I'd like to adjust the differential to 20 degrees, but this aquastat doesn't appear to be adjustable in that way. Is there a better option?

Comments

  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    The basic problem is you boiler is making more hot water than is needed. 5 degrees on a differential isn't going to help.
    How many zones?
    Indirect/tankless coil or separate water heater?
    If this is gas, the only way to correct is a properly sized mod con, ODR, and possible a buffer tank.
    If this is oil, then only a buffer tank will help with short cycling.

    There was an error rendering this rich post.

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