OpenSprinkler › Forums › OpenSprinkler Unified Firmware › Activating main valve alone? › Reply To: Activating main valve alone?
May 10, 2021 at 5:42 pm #70066
You can do so by using a spare zone (you don’t need zone expander, you can simply enable more zones in Edit Options -> Station Handling, OpenSprinkler allows you to set more logical zones than the number of physical zones you may have). The spare zone can serve as a ‘dummy’ zone to activate master.