Running 2 Taco zone pumps off one Taco controler

Discussion in 'Electrical Forum discussion & Blog' started by tom3holer, Mar 3, 2013.

  1. tom3holer

    tom3holer New Member

    Mar 1, 2013
    Cape Cod

    I just had a new heating system installed in my home. It is a boiler/baseboard system with 5 zones.
    I have now discovered the installer really didn't have a clue as to what I really needed. He did no heat loss study and just assumed the old boilers rating was what I needed. I have ended up with a system that is probably 2x the BTU's that I need which causes it to short cycle much of the time.
    One of the things I have read that I can do to help this expensive screwup is to have more heat load. If I combine two of the three zones on the first floor that should help. Does anyone know if you can run two Taco 007-FS-71FC punps from one zone on a Taco SR-504 zone controler?


  2. ShockHazard

    ShockHazard New Member

    Nov 1, 2012
    Independent Contractor
    North East Pennsylvania
    You can pull up to 1/3 hp per zone on that controller.
    I'd reccomend simply getting a larger pump.

    Your pumps are 1/25 hp.

    Make sure the temperature ranges on the aquastat are set far apart - this will reduce cycling and often add to efficiency.
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