two zone circulator electrical connections taco to becket afg

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by d trois, Nov 9, 2010.

  1. d trois

    d trois New Member

    Nov 9, 2010
    Boston, MA
    :(would attaching the two taco's to c1 and c2 on the aquastat and the two thermostat wires to the tt work. Or do i need to use a taco relay board with 2 or 3 zones? Anyone know?:confused:
  2. nhmaster

    nhmaster Master Plumber

    Jul 30, 2008
    Tech. Instructor
    S. Maine
    sure it will work. when you turn either thermostat up, both circulators will run. I assume though that that is not your intent so, yes you will need another relay to call the 2nd zone. You can go with a Taco relay or a honeywell 89a or 854 or one of the newer electronci versions. Either way you need to isolate the thermostats and circulators from each other. Wiring diagrams can be found at
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