Rain Bird Sprinkler Timer Isa 304 Manual
Before programming schedules, ensure the internal clock is accurate: : Turn the dial to TIME & DAY arrows to set the hour (check for AM/PM) and minutes. : Press the button (right arrow) to make the day flash, then use the arrows to select the current day. : Turn the dial back to 2. Using Pre-Set Schedules
The manual is not just a piece of paper; it is the key to water conservation and plant health. rain bird sprinkler timer isa 304 manual
The ISA 304 is designed for indoor use and manages up to four watering zones. Before programming schedules, ensure the internal clock is
- Automatic Mode: The controller will automatically water your lawn and plants at the programmed times.
- Manual Mode: You can manually water your lawn and plants by pressing the "MANUAL" button.
This sets how long each sprinkler zone runs. Automatic Mode : The controller will automatically water
Note: The Rain Bird ISA series (often labeled as “ISA 304” or “ISA-304”) is an older, legacy electromechanical or basic digital controller. If you are looking for a modern equivalent, this model has been discontinued for many years. This article serves as a historical reference and functional guide based on original documentation.
Here are some tips and tricks to help you get the most out of your Rain Bird Sprinkler Timer ISA 304:
If you have lost your manual, download a PDF today from one of the sources above. Print it out, tape it inside the timer’s door, and your ISA 304 will keep your lawn green for another 20 years.

