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Roth tank with overhead line.



  • rolandoLI
    rolandoLI Member Posts: 12
    Soooo ... should I leave the temperature for the High limit
    And low
    Limit alone??
    Yesterday was really cold here in Long Island and I notice that my boiler was turning on and off very frequently, the temp would go downt to 170 and turning on until it reach high limit 185. It kept the house comfortable at 68 but it seems to be overworking.
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,506
    Thought that was already answered.
    If you're bouncing off the high limit on the colder (coldest) days, your boiler is simply way too big.
    HVACNUT Member Posts: 5,755
    edited January 2020
    You've got the Hydrostat 3250 Plus?
    Set it for cold start, limit 170° (because it wasn't that cold on Long Island yesterday), 20° diff. Circulator Hold off, Economy settings, etc.

    Is it wired for the indirect to override the Economy settings?

    Circulators on the return too. Tsk tsk.

    Check the Hydrostat manual for options.

    BTW, you're ON Long Island, not IN. Everybody knows that. 😁
  • pecmsg
    pecmsg Member Posts: 4,696
    Yesterday wasn't that cold.

    Wait for single digits and the winds blowing. If the boiler cycles its oversized!

    ON the East End
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,594
    In the unlikely event of a fire, the plastic in the tiger loop would melt, literally adding FUEL to the fire. So put it outside where the firefighters can more easily extinguish the blaze. To get USA approval, and UL listing, a firomatic valve did the job.

    Does the Lead handle on that valve melt before plastic?
    I'm sure someone has done that test! I'd like to know the answer
    Edward F Young. Retired HVAC ContractorSpecialized in Residential Oil Burner and Hydronics
    EBEBRATT-Ed Member Posts: 15,344
    @EdTheHeaterMan I think firomatics are 165 deg.