I have a well with a pump control box and a pressure tank that serves both the house and the lawn.
According to this article in Help, I should wire the Rachio 3 to the pump start relay in the pump control box. “Anytime a zone is activated, the pump relay is activated to pressurize the system with water.”, it says.
This doesn’t make sense. The system is always pressurized because it has a pressure tank. The tank and pump control box manage the pump cycling in response to usage.
The pump control box has no interface for external control wiring. My old sprinkler controller did not have anything connected on those terminals.
The rachio documentation also states " Now that you’re all set, configure your controller to enable pump features:
More > Controller Settings > Advanced Wiring (M Terminal) > Well or Pump Start Relay
Doing so will enable the Delay between Zones feature for scheduling."
This confused me. If I don’t wire the M Terminal, I won’t have access to the Delay Between Zones feature? Even though there is a pressure tank, it’s still important to rest the pump.
Can anyone clarify and confirm?