Rain Bird ISA-304 is a 4-station indoor sprinkler timer designed for residential use. It features six pre-set watering schedules and the ability to customize programs to fit specific landscape needs. Programming Instructions To program the Go to product viewer dialog for this item.

Version A: Electromechanical (Dials & Pins)

  1. Set Current Time: Turn the large dial to "SET TIME." Rotate the time dial (or press +/-) to the correct time. Pay attention to AM/PM (usually a small light or indicator).
  2. Set Watering Days: Turn dial to "WATER DAYS." Move switches or pins:

    Step 4: Set Station Run Times (Duration)

    This sets how long each sprinkler zone runs.

    Why You Still Need the ISA 304 Manual

    You might be tempted to "just push buttons." However, the ISA 304 does not have buttons in the conventional sense. It has a rotating dial, sliding switches, and small plastic pins. Without the Rain Bird sprinkler timer ISA 304 manual, common mistakes include:

    | Symptom | Likely Cause | Solution (from Manual) | | :--- | :--- | :--- | | Clock not advancing | Power outage or gear slip | Check outlet (120V). If power is present, internal gears may need replacement. | | Watering starts but never stops | Stuck valve or missing station pins | Turn dial to OFF. Check for debris in valve. Remove station pins and reinsert. | | Only Station 1 waters | Broken station pin wheel | Inspect the inner wheel for cracked plastic. Replace the timer mechanism. | | System waters at wrong time | Tripper pin set incorrectly or dial slips | Reset all start time pins. Ensure dial is fully pushed in on "RUN". | | No power to valves | Blown fuse or transformer | The ISA 304 uses a small glass fuse (3A, 250V). Located near the terminal strip. |

    : Toggle specific days on or off by advancing through the week with the right arrow and using the arrows to select 4. Manual Operation