Here is a bit more info on how smart cycle can be used to induce an automatic well delay:
Excel file with the math can be downloaded here (link)
Step 1 is to figure out how many zones within the schedule usually run at the same time. Normally the number is fewer than the total number of zones within the schedule because normally not all of the zones within the schedule need to be watered on the same day (due to the difference in soil / shade / plants… etc).
Step 2 is to figure out how long the well can nominally provide the water before needing to recover.
Step 3 is to future out how long the recovery should take.
The trick is to specify the soak time long enough to ensure sufficient recovery time. For example we may have the following conditions:
- There are three zones which typically run within a given schedule.
- The well can provide water for 20 minutes before needing to recover
- The well takes 30 minutes to recover
Step 4 is to calculate Cycle duration which would = to (step 2) / (step 1) = 20 / 3 = 6.6 minutes ~ 6 minutes rounded down
Step 5 is to calculate Soak duration which would = to (step 3) + ((step 4) * (Step 1 minus 1)) = 30 + (6 * (3-1)) = 42 minutes
The long soak time ensures that there is a period of time where none of the zones are ON, thus provide the recovery time and calculated cycle duration means that, on average, the active time will not exceed the time the well can supply the water.
On the screenshot above (better seen within the excel download link at the top), each cell is 6 minutes. Each zone takes 6 minutes to run before soaking for 42 minutes. Three zones will run 18 minutes in total before the system would pause for 30 minutes before zone 1 is ready to go again. The cycle will repeat as many times as needed.