Rain Bird ST8I-2.0 Smart Indoor WiFi Sprinkler/Irrigation System Timer/Controller User Manual

1. Introduction

The Rain Bird ST8I-2.0 Smart Indoor WiFi Sprinkler/Irrigation System Timer/Controller is designed to provide efficient and convenient control over your irrigation system. This 8-zone, WaterSense certified controller allows for remote management via a mobile application, ensuring optimal watering schedules based on local weather conditions. This manual provides essential information for installation, operation, and maintenance of your Rain Bird ST8I-2.0 controller.

Figure 1: Front view of the Rain Bird ST8I-2.0 Controller.

2. Package Contents

Verify that all items are present in the package before beginning installation:

• Rain Bird ST8I-2.0 Smart Indoor WiFi Sprinkler/Irrigation System Timer/Controller
• Transformer with 6-foot cord
• Mounting hardware (screws and anchors)
• AAA alkaline backup battery (pre-installed or included)
• User manual (this document)

Figure 2: Contents included in the Rain Bird ST8I-2.0 package.

3. Installation

3.1 Mounting the Controller

The ST8I-2.0 is designed for indoor use. Select a location that is protected from the elements and has access to a standard electrical outlet. Use the provided mounting hardware to securely attach the controller to a wall.

3.2 Wiring the Controller

Before wiring, ensure the power to your existing irrigation system is turned off. Connect the common wire(s) from your valves to the 'C' terminal. Connect each zone wire to its corresponding numbered terminal (1-8). The controller supports a master valve or pump start relay, which should be connected to the 'M' terminal. A wired rain sensor (sold separately) can be connected to the 'SENS' terminals. The WiFi module connects to the 'ACCESSORY' port.

Figure 3: Rain Bird ST8I-2.0 Controller showing wiring connections.

4. Initial Setup & Connectivity

4.1 Powering On and Basic Settings

Once wired, plug in the transformer. The controller will power on. Use the BACK, DOWN, UP, and NEXT buttons to set the current date and time on the LCD display.

4.2 Connecting to WiFi and the Rain Bird App

The ST8I-2.0 connects to your home WiFi network, enabling remote control via the Rain Bird mobile app. Download the Rain Bird app from your device's app store (compatible with Apple iOS 8 or greater, and Android 4.4 (KitKat) or later). Follow the in-app instructions to connect your controller to WiFi and set up your account. This allows you to manage your irrigation system from anywhere.

Figure 4: Rain Bird app interface for managing irrigation schedules.

5. Operation

5.1 Manual Control

The controller features physical buttons for direct operation:

• OFF: Turns off all watering.
• AUTO: Enables automatic scheduled watering.
• WATER NOW: Initiates manual watering for a selected zone.
• SCHEDULE: Allows manual adjustment of watering schedules directly on the unit.
• SEASONAL ADJUST / DATE-TIME: Adjusts watering duration seasonally or sets the date/time.

5.2 App Control

The Rain Bird app provides comprehensive control and advanced features:

• Custom Watering Schedules: Set individual watering days (custom days of the week, odd/even calendar days, or cyclic every 1-14 days), up to 6 start times per zone, and run times from 0-199 minutes. Each zone can be named and assigned a picture for easy identification.
• Automatic Seasonal Adjust: Enable this feature to automatically adjust daily watering schedules based on your specific ZIP Code's season, local weather, temperature, and humidity. This optimizes water usage and plant health.
• Watering Delay: Suspend watering for 1 to 14 days directly from the app. Programming automatically resumes after the selected delay period.
• Notifications: Receive alerts on your mobile device regarding program changes, watering delays, seasonal adjustments, WiFi disconnections, valve malfunctions, or potential freeze conditions.
• Multi-Device Access: Install the app on multiple devices and securely share control with family members or landscapers.

Figure 5: Configuring zones and schedules within the Rain Bird app.

6. Features & Compatibility

The Rain Bird ST8I-2.0 controller offers several advanced features and broad compatibility:

• WaterSense Certified: This controller is EPA WaterSense certified, indicating it can provide at least a 20% water savings compared to non-certified timers.
• Amazon Alexa Compatibility: Integrate your sprinkler system with Amazon Alexa for voice control of watering functions.
• Master Valve/Pump Start Relay Support: Connects to a master valve or pump start relay for enhanced system control.
• Wired Rain Sensor Support: Compatible with wired rain sensors (e.g., Rain Bird CPRSDBEX, sold separately) to automatically turn off watering when it rains, further conserving water.
• 24 VAC Irrigation Valve Compatibility: Works with most standard 24 VAC irrigation valves.

Figure 6: The Rain Bird ST8I-2.0 is compatible with Amazon Alexa.

Figure 7: A Rain Bird rain sensor, an optional accessory for water conservation.

7. Maintenance

The Rain Bird ST8I-2.0 is designed for minimal maintenance:

• Battery Backup: The included AAA alkaline batteries provide backup power to retain all timer settings indefinitely in case of a power outage, eliminating the need for reprogramming.
• Sealed Case: The controller features a sealed case that protects internal components from moisture, insects, and grime, ensuring long-term reliability.
• Location: For optimal performance and longevity, install the timer in a weather-resistant indoor location such as a garage or waterproof shed.

8. Troubleshooting

If you encounter issues with your Rain Bird ST8I-2.0 controller, consider the following:

• No Power/Display Off: Check the power connection to the wall outlet and ensure the transformer is functioning. Verify the AAA backup batteries are correctly installed and have charge.
• WiFi Disconnection: Ensure your home WiFi network is operational and the controller is within range. Check the Rain Bird app for specific disconnection notifications and troubleshooting steps.
• Zones Not Watering: Verify that the zone wires and common wire are securely connected. Check for any active watering delays or seasonal adjustments in the app that might be preventing watering. Ensure the controller is in 'AUTO' mode for scheduled watering.
• Incorrect Date/Time: The controller should automatically sync time via WiFi. If incorrect, manually adjust using the controller buttons or check app settings.
• App Issues: Ensure your Rain Bird app is updated to the latest version. Restart the app or your mobile device if experiencing unexpected behavior.

For further assistance, refer to the Rain Bird support website or contact customer service.

9. Specifications

10. Warranty and Support

Rain Bird products are manufactured to high-quality standards. For specific warranty information, please refer to the warranty card included with your product or visit the official Rain Bird website. For technical support, troubleshooting, or replacement parts, please contact Rain Bird customer service or visit their online support resources.

Online Resources: www.rainbird.com