Zone Delay is a new feature to delay the actual watering task by a specified duration. For example, if you have a pump relay connecting to the master zone and it takes a certain time for the pump to run before you can start watering, then you can specify this "delay" in your program.
Please note that this feature is not limited to the use of a master zone. It is available as a general feature.
How Does the Zone Delay Affect Your Watering Cycle
The Zone Delay feature is available in the Manual Program, Smart Program, and Conditional Program. You can specify the "zone delay" on the same setting page where you specify the "duration" for that program.