Select your desired zone by moving the station slide switch or pressing the station button to .
This is the first step in programming:
Utilize arrow keys to select a station (1–4), then to adjust run time from 1 minute up to 2 hours. Rain Bird ISA 300 / 400 Series Sprinkler Timer Manual
⚠️ connect more than one valve wire to a single terminal; doing so will damage the timer. rain bird sprinkler timer isa 304 manual
Visit the Rain Bird ISA/ISM Series Support Page for PDFs of the official manual.
Place two #10 screws horizontally on your wall exactly 4¾ inches (120 mm) apart .
This completes the physical installation. You are now ready to program your ISA 304. Select your desired zone by moving the station
The Rain Bird ISA 304 is a classic, mechanical-dial sprinkler timer known for its durability and straightforward operation. Unlike modern digital controllers, it relies on physical switches and dials to manage your lawn's watering schedule. If you have misplaced your original paper manual, this comprehensive guide serves as your complete operational blueprint. 🛠️ Product Overview and Specifications
Turn the dial to Manual Watering . Select the specific zone and set the time, then press Start. 5. Troubleshooting and FAQ
Pull the pin (or toggle the switch up) for days you want to skip watering. Step 3: Set Zone Run Times Locate the Station Duration Dials labeled 1 through 4. Visit the Rain Bird ISA/ISM Series Support Page
In the hot summer months, pull out more day pins on the 14-day wheel to increase watering frequency. In the cool spring and autumn months, push pins in to scale back watering and prevent root rot.
(frequently listed under the ISA/ISM 300 & 400 Series Support Page ) is designed for simplicity. It controls four individual sprinkler stations, allowing for custom schedules for different areas of your yard. 4 (Ideal for small to medium lawns). Programs: Easy-Set logic.
If your specific sub-model utilizes a battery backup to keep time during power outages, replace the battery once every year before the spring startup.
You will need to supply a 9‑volt alkaline battery and appropriate gauge sprinkler wire.