Taco Sr502 4 Wiring Diagram. Click on the image to enlarge and then save it to your computer by right clicking on the image. Taco sr502 4 2 zone switching relay the taco sr502 4 switching relay is the best choice for all your zoning needs with advanced powerport cards external diagnostic lights switchable priority and contractor friendly pc board layouts.
Just circulators thermostat and end relay to the boiler. January 18 2017 plant id 9300 2868 warningwhen using alternative wiring diagram wiring instruc. Neutral wire to terminal n.
Hot wire to terminal h.
Taco sr502 wiring. Neutral wire to terminal n. Wiring diagram and schematic role. Taco sr503 with l8124a wiring help.