Taco Wiring Diagram 504

Taco switching relays are made in the usa and include an extended 3 year warranty.

Taco wiring diagram 504. Im 9999 sure i did everything correct because the heat comes on the nest works the taco red light goes on when a call for heat is made. All is good the nest has a constant 393 volts. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain cir cumstances causing injury or death. Taco zone controls wiring guide pages switching relays single zone wiring 2 12.

Sr 504 zone 2 power zone 1 zone 3 zone 4 jumper t t t four zone switching relay with optional priority zone 4 on off. Taco product information switching relays product no. Failure to follow this instruction can result in personal injury or death andor property damage. Combined with the time proven reliability of the 00 family of circulators and thermostats total system integrating is achieved.

Cold start boiler application. When using alternative wiring diagram wiring instructions must be followed so power originates from the boiler aquastat. Taco zone controls wiring guide pages switching relays single zone wiring 2 2. When using alternative wiring diagram the boiler oper ating controls zc terminal will see the load of the circulators.

I used the taco supplied cross reference chart to wire it up. Sr 504 zone 2 power zone 1 zone 3 zone 4 l1 l2 t line voltage oil burner relay circulator on boiler if attached b2 c1 zr b1. 12 18 gauge wire recom mended for 120 vac connections 14 22 gauge wire for thermostat connections and 14 22 gauge wire for 24 vac source connections. Taco zone valve wiring voltage and water flow tested and provedthe water in the top falls through.

Ac service tech llc 43409 views. Aquastat wiring 83 89 instruction sheets 90 102 standard terms and definitions 103 zone controls cross reference 104 105 do it once. November 27 2014 supersedes date.