Rain Bird Sprinkler Timer Isa 304 Manual -

Use the button to cycle between day, hour, and minutes.

: Connect the 24-volt transformer to a standard 120 VAC/60 Hz outlet. Run 18-gauge underground-approved wire from the timer to your valves (one common wire plus one wire per station).

Use the to adjust the values, then turn the dial to Auto/Run to save. Select a Schedule : Turn the dial to Pre-set Schedules .

Turn the dial to Custom Schedule – Starts . You can set up to three start times per day in 15-minute increments. rain bird sprinkler timer isa 304 manual

Before programming, locate these physical components on your unit. The manual refers to them constantly:

If you have lost your physical manual, this guide serves as a comprehensive substitute.

: Offers six pre-set watering schedules (C and 1–5) and allows for a fully customized "Custom" program. Use the button to cycle between day, hour, and minutes

: Turn the dial to Rain/Off to stop all automatic watering during wet weather without losing your program.

To check individual heads, use the Test mode. This will automatically run each zone for two minutes, allowing you to walk the yard and check for leaks or clogs.

. Use the arrows to select a program (1–5) ranging from daily 10-minute cycles to every-fourth-day 15-minute cycles. Custom Days : Turn the dial to Custom Schedule – Days Use the to adjust the values, then turn

This tells the system when to begin the watering cycle. You can have multiple start times (e.g., morning and evening).

: Turn the dial to Auto/Run to activate the programmed schedule. Manual & Special Features

For further help, contact Rain Bird’s support team at 1-800-RAIN-BIRD, but have your manual handy—they will reference specific diagrams from the ISA 304 guide.