I just installed a new sprinkler system and we are trying to hook it up to Rachio. I have all of my zones plugged in, however I have 1 remaining wire, which is suppose to go to Ground. I have tried reading your documentation, but I don’t see anything around where to plugin the ground wire. Is “Common” the equivalent of ground for your controller?
Do you have pictures? My guess is that the wire should go to the common. Each valve has two wires, one goes to the common (all grouped together) and the other wire goes to the zone number. Good luck.