Press the the plus (+) or minus (-) button to select the number of days between watering days (from 1 to 31 days). This is called the interval.
When the interval starts depends upon what time of the day you set the interval and what time you set the start time. The X-Core does not show you days left on Interval.
If you set the interval AFTER the start time has passed, the irrigation will start after the number of days has past.
If you set the interval BEFORE the start time, the irrigation will start that day and then start the interval day cycle.
If your start time is 5am, and you set the interval at 9am, and you have a 4 day interval, the irrigation will not run for 4 days, then every 4 days after that.
If your start time is 10am, and you set the interval at 9am, and you have a 4 day interval, the cycle will start at 10am, and then every four days after that.
NOTE: When using the Interval Watering programming it is best to leave all days as water days. If the interval falls on a no water day, that day will not water and the interval count down will start over again.