Rain Bird Sprinkler Timer Isa 304 Manual May 2026

Programming Instructions

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. To program the Go to product viewer dialog for this item.

1. Turn main dial to ON (Manual).
2. The timer will immediately start with Zone 1, then Zone 2, etc., for the set run times.
3. To stop early, turn dial to OFF.

1. Set Clock: Press the SET CLOCK button. Use the +/- or arrow keys to set year, month, day, and time.
2. Set Watering Days: Press SET WATERING DAYS. Select each day you want (e.g., Mon, Wed, Fri) and press NEXT.
3. Set Start Time: Press SET START TIME. Choose the hour/minute for watering to begin.
4. Set Zone Run Times: Press SET RUN TIMES. Select Zone 1, enter minutes (1-240). Press NEXT for Zone 2, etc.
5. Manual Operation: Press MANUAL key. Select a single zone or "ALL ZONES" to run through the programmed schedule immediately.

Manual Start

: Quickly initiate a watering cycle for a specific station without affecting scheduled programs. rain bird sprinkler timer isa 304 manual

System Off (Rain Delay / Vacation)

1. Press the OFF button once.
2. The display will usually show "OFF" or a rain drop icon.
3. This suspends all automatic watering. The time and program remain saved.
4. To resume watering, press the OFF button again or press any programming button (like CLOCK or STATION TIMES) to wake the unit up.

5. Return to Auto Run

. The default is "C" (Custom). Use arrow keys to cycle through preset options (e.g., Schedule 1 waters daily at 8 AM for 10 minutes). Customize Days (Schedule C) : Turn the dial to Custom Schedule – Days button to move through days and the arrows to toggle them "ON" or "OFF". Set Start Times : Turn the dial to Custom Schedule – Starts Programming Instructions Rain Bird ISA-304 is a 4-station