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Right now if the pool timer is switched off, the SWG stays on. Likewise, if I switch the Shelly off and switch the timer on, the SWG stays off (and the pump turns on). Checking the SW terminal with a voltage sensor, it is hot when the pool timer is switched on, and dead when switched off. The workaround right now is the setting the schedule feature to closely match what the timer is doing.
Any ideas?
Isn't there a flow switch? Mine has a Flow Switch as a safety feature that came with the cell. While I understand what you are trying to do, it is not safe for you or the equipment. If the cell has been on any significant amount of time with no flow, you have likely damaged it. See this Article
Appreciate the concern, but my safety or the equipment’s safety isn’t at risk here. The cell I have (Pentair IC40) has an integrated flow and salt sensor. If either are low, the system is off. The low power draw of the system is specifically what I’m after to know to check the cell to see why it’s not generating.
I just installed the Shelly this afternoon, which is why I’m posting after not getting the expected result out of the switch input.