I used this transformer as the power supply for the actuators.
I have a standard GE Zwave switch trip two of these relays (one for each of the valve actuators). Both actuators run off the same transformer but I had to separate the relays to get the valves to work correctly.
The valve actuators have internal limit switches that handle the range of motion, you can set it however you like. I let one of my valves do a full 180 degree turn, and the other one only about 135. Once wired up, is basically works that they turn one way when when the relays are closed by the GE switch, and the other way when the relays are opened.
I don’t have any way to remotely adjust the temp on my pool heater, I just leave it set to 102 (from the panel) and remotely turn it on or off. It does it’s own cutoff and relight after reaching it’s set temp. I’m in Phoenix so no worries about ice here.