New homeowner question with two thermostats and one boiler. Question is: How do the safety switches get wired to the Taco?
Current config is:
Burnham Series 2 boiler (P-206A-WNI) stamped 1994
Honeywell R8285D connected to thermostat A, pump A, and S8610M.
Honeywell RA89A connected to thermostat B, and pump B.
Problem is thermostat B had no connection to the boiler to call for heat - it would pump cold water through it's loop.
Searched and read forums for similar situations and saw a recommendation to replace the two Honeywell relays with a Taco SR502 (SR502-4 wiring guide
). I believe I have all the wiring mapped out except for the sensor circuit.
Currently there is a wire running from the Y-terminal on the R8285D serially through the blocked vent, flame rollout, and aquastat sensors before connecting to the TH-W connector on the S8610M. I'm trying to figure out where this would connect on the Taco. I suspect the 24VAC (top terminal?) on the upper left of the board?