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I have The Jandy® Pro Series AquaLink® PDA automation system and wan to incorporate the 7620 serial adapter. Do I need to disconnect the PDA? Or is there way to set it up

I close my pool but keep my inground spa open all winter. To prevent freezing I had to run both the filter pump and jet pump (spa) once the freezing weather stayed. I hear there is a way to plumb the system to run water through the jet pump when the filter pump is running so the jet pump...