24VAC Switch for Pool Gas Heater

[Navat604 (R.)]

Instead of adding an external relay and if 120VAC is available. The vision relay module has dry contact you can use. Have a look at this post.

VISION - ZL7431US - Single Relay Module Switch - Wiring Diagram and Other Useful Information

I have been searching for a simple and tiny relay switch to use with Smartthings. I believe I have found it. I have been testing the device and created a Wiring Diagram that is more useful than the one supplied by Vision. This product was intended to be used behind non-smart wall switches to allow you to make a dumb-switch smart. This works in Smartthings without a custom device handler as a simple switch. If you change the device type in the IDE to say a Z-Wave Virtual Momentary Contact Switch then its applications open up tremendously. Also the RELAY on the Vision ZL7431US is isolated unlike the Fibaro switches I have tried. To me having the isolated relay makes this much more useful for other projects. Also because it is much more tiny than say the Linear FS20Z (also an isolated relay)…