Wiring Weil-McLain AquaPlus to a Taco SR503-5

JS41190

I have a Weil-McLain CGa 5, Weil McLain Aqua Plus 45 and Taco SR503-3.

I am trying to wire the Indirect’s aquastat to the Taco SR. I have both of the inputs on the aquastat getting 24V from the R and W terminals in the Taco SR. (There is no display on the aquastat).
Where would I wire the OUTPUT of the aquastat to on the Taco SR? I am thinking the X X Priority End Switches, but I do not want to destroy either of these controls obviously.

Ironman

No, the end switch is what brings the boiler on.

You wire the aquastat to the priority zone terminals “R & W”.

“AC1 & AC2” go to the “24V” terminals.

109A_5

For DHW priority.

Red on the aquastat to R Zone 1 (priority) on the zone panel.

White on the aquastat to W Zone 1 (priority) on the zone panel.

Yellow on the aquastat (AC1) to Zone 1 (priority) C on the zone panel. (AC1 shows it as the grounded side)

Green on the aquastat (AC2) to R on the zone panel.

Enable the priority, the switch array on the Right hand side.

Connect the Main X-X and Priority X-X (DHW) End Switch terminals to the appropriate place on the boiler.

Connect the heating zones to Zone 2 and Zone 3.

Make sure the circulators are wired appropriately.