I'm not sure exactly what you are talking about, as the Hunter systems need to be set with how many days per week the system should run. If the homeowner reduced their irrigation from lets say, 2x per week to once per week, they will need to reset to twice per week, if that's how many times they wish to water.
The seasonal adjustment regulates how long the system will run for and is controlled by the sensor on the outside of the garage. Not only rain affects the sensor but so does, sunlight, temperatures, etc... They are like little weather stations.
|