Rain Bird ESP-ME3-A1 Irrigation Controller Instruction Manual

1. Introduction

The Rain Bird ESP-ME3-A1 is a versatile irrigation controller designed for both residential and light commercial applications. This model comes with 4 stations and is expandable up to 22 stations with optional modules, providing flexibility for various irrigation needs. It features Wi-Fi readiness, allowing for smart control and water management when paired with the LNK Wi-Fi module (sold separately).

2. Key Features

• Expandable Stations: Starts with 4 zones, expandable up to 22 zones with optional station modules.
• Indoor/Outdoor Installation: Includes a power cord for plug-in installations; cord can be removed for hardwiring the internal transformer to a junction box.
• Non-Volatile Memory: Retains controller settings indefinitely, even after prolonged power outages.
• Wi-Fi Connectivity (Optional): Compatible with the Rain Bird LNK Wi-Fi Module (sold separately) for remote access, operation, and monitoring via the enhanced Rain Bird app. Enables internet-based weather adjustments for water savings.
• Flow Monitoring (Optional): Compatible with wired flow sensors (sold separately) for water monitoring and notifications, helping to save water and prevent property damage.

3. Setup & Installation

3.1. Mounting the Controller

Choose a suitable indoor or outdoor location for mounting the controller. Ensure it is within 6 feet of an AC power outlet and away from major appliances or air conditioners to minimize Wi-Fi interference. Use appropriate drywall anchors if necessary.

Figure 1: Front view of the Rain Bird ESP-ME3-A1 Controller.

Figure 2: Side view showing the integrated power cord for easy plug-in installation.

3.2. Wiring Connections

Before making any wiring connections, ensure the power to the controller is disconnected. If replacing an existing controller, take a photo of the old wiring for reference. Route all field wires through the opening at the bottom of the controller. Do not route valve wires through the same opening as the power wires to avoid interference.

Figure 3: Internal view of the controller showing wiring terminals.

• Zone Wires: Connect one valve wire from each valve to one of the numbered zone terminals (1, 2, 3, 4, etc.) on the controller.
• Common Wire: Attach the common wire (usually white) to the common terminal marked 'C'.
• Sensor Wires: If installing a Rain/Freeze sensor, remove the yellow jumper wire connecting the 'SENS' terminals and connect the sensor wires to these terminals. The controller will not function if this jumper is removed and no sensor is connected.
• Power: Plug in the power cord or hardwire the internal transformer.

4. Operating Instructions

The ESP-ME3-A1 controller features an intuitive dial and button interface for easy programming. Once powered up, the status light on the front should start flashing blue, indicating it's ready for setup.

Figure 4: Controller with cover open, showing the user interface.

1. Set Date/Time: Turn the dial to 'Date/Time' and use the arrow buttons to set the current date and time.
2. Set Start Times: Turn the dial to 'Start Times'. Select a program (A, B, C, or D) and set the desired start times for your irrigation cycles. The controller supports up to 4 start times per program.
3. Set Run Times: Turn the dial to 'Run Times'. Select each zone and set the duration (in minutes) for which each zone should water.
4. Set Water Days: Turn the dial to 'Water Days'. Choose specific days of the week for watering, or select odd/even days.
5. Automatic Operation: Turn the dial to 'AUTO' for automatic operation based on your programmed schedule.
6. Manual Watering: Turn the dial to 'Manual Watering' to manually run a single zone or all zones.

5. Wi-Fi Connectivity & App Usage

The ESP-ME3-A1 is Wi-Fi ready. To enable smart features, you will need to purchase and install the Rain Bird LNK Wi-Fi Module (sold separately). Once installed, download the Rain Bird app on your mobile device (available on App Store and Google Play).

5.1. Connecting to Wi-Fi

1. Ensure your Wi-Fi module is flashing blue (or red and green, then press the button once).
2. Open the Rain Bird app and tap 'Add Controller'.
3. Select 'ESP-ME3' from the list of controllers.
4. Follow the on-screen prompts to connect your controller to your local Wi-Fi network. Ensure your Wi-Fi network is broadcasting in 2.4 GHz mode.
5. Set a password for your controller for security.

5.2. App Features

• Remote Access: Operate and monitor your irrigation system from anywhere.
• Automatic Adjustments: Utilize internet-based weather information for daily adjustments to your irrigation schedule, optimizing water usage.
• Notifications: Receive alerts and status updates directly to your mobile device.

6. Water Management Features

• Seasonal Adjust: Easily increase or decrease watering duration for all zones simultaneously to adapt to changing seasonal needs.
• Rain Delay: Temporarily suspend irrigation for a specified number of days after rainfall, preventing overwatering.
• Permanent Days Off: Set specific days of the week as permanent non-watering days.
• Flow Monitoring: With an optional flow sensor, the system can detect leaks or breaks in the irrigation system and provide alerts, helping to conserve water and prevent damage.

Figure 5: Controller display showing 'SENS ON' indicating an active sensor.

7. Maintenance

Regular maintenance ensures optimal performance and longevity of your Rain Bird ESP-ME3-A1 controller.

• Cleaning: Periodically wipe down the controller's exterior with a soft, damp cloth. Avoid harsh chemicals.
• Wiring Inspection: Annually inspect all wiring connections for corrosion or loose terminals.
• Sensor Check: If using a rain or flow sensor, ensure it is clean and free from obstructions.
• Seasonal Adjustments: Adjust seasonal watering percentages as needed to match local climate conditions.

8. Troubleshooting

If you encounter issues with your controller, refer to the following common troubleshooting tips:

• No Power: Check the power connection and ensure the outlet is functional. Verify internal wiring if hardwired.
• Zone Not Watering: Ensure the controller is in 'AUTO' mode. Check the run times and water days for the specific zone. Inspect wiring connections for the zone and common wire.
• Wi-Fi Connectivity Issues: Verify your Wi-Fi network is 2.4 GHz. Check the signal strength at the controller's location. Ensure the LNK Wi-Fi module is properly installed and its status light is active.
• Overwatering/Underwatering: Adjust seasonal percentages or individual zone run times. Check for active rain sensor delays.

9. Specifications

10. Warranty & Support

For specific warranty information and technical support, please refer to the documentation included with your product or visit the official Rain Bird website. Keep your purchase receipt for warranty claims.