I was wanting to connect a new Iro to try it out in parallel with my existing system (where only one controller would be active at a time). In the manual, it pointed me to rachio.com/relay which lands me on this page regarding two Iros managing a single master:
Seems like in my case, I would need to use the same 24VAC switching for each zone in addition to the master valve correct? I can see why electrical code would not count software scheduling as a valid control to prevent two controllers from applying two AC voltages at the same time.
In my case, if only one controller’s power supply was plugged in at a time, all will be well?