Introduction
The Rain Bird ESP-RZX4i-120V is a user-friendly indoor sprinkler timer designed for efficient and reliable irrigation control. This manual provides comprehensive instructions for installation, programming, operation, and maintenance of your new controller, ensuring optimal performance and longevity.
Safety Information
WARNING: To avoid electrical shock, always disconnect the power to the controller before performing any wiring connections.
- This controller is designed for indoor use only. Do not install outdoors or in areas exposed to rain or extreme moisture.
- Ensure the power supply voltage matches the controller's requirements (120V AC).
- All wiring must comply with local electrical codes.
- Keep the controller away from children and pets.
Package Contents
Verify that all items are present in your package:
- Rain Bird ESP-RZX4i-120V Controller
- External Plug-in 120V Transformer
- Mounting Hardware (screws and wall anchors)
- User Manual (this document)
Setup
1. Mounting the Controller
- Choose a suitable indoor location near a 120V AC outlet, away from direct sunlight and extreme temperatures.
- Use the provided mounting template (if available) or hold the controller against the wall and mark the two mounting holes.
- Drill pilot holes and insert the wall anchors if mounting into drywall.
- Secure the controller to the wall using the provided screws.
2. Wiring the Valves
Before wiring, ensure the power transformer is unplugged.
- Locate the wiring terminal block inside the controller.
- Connect one wire from each solenoid valve to its corresponding numbered terminal (1, 2, 3, 4).
- Connect the common wire from all solenoid valves to the terminal labeled 'C' (Common).
- If your system includes a master valve or pump start relay, connect its wire to the terminal labeled 'MV' (Master Valve).
- If using a rain sensor, connect its wires to the 'SEN' terminals. Refer to your rain sensor's manual for specific wiring.
3. Installing Batteries
The controller uses 2 AAA batteries (not included) for non-volatile program memory and programming under battery power.
- Open the battery compartment cover, usually located on the back or bottom of the controller.
- Insert 2 AAA batteries, observing the correct polarity (+/-).
- Close the battery compartment cover.
4. Connecting Power
- Plug the external 120V AC transformer into a suitable indoor electrical outlet.
- Connect the transformer's output wire to the power input terminals on the controller.
- The LCD display should illuminate, indicating power is supplied.
Figure 1: Front view of the Rain Bird ESP-RZX4i-120V controller.
Operating the Controller
The ESP-RZX4i features a large LCD display and intuitive buttons for easy navigation and programming.
Figure 2: Hands interacting with the controller's buttons.
1. Setting Date and Time
- Press the DATE/TIME button.
- Use the + and - buttons to adjust the year, month, day, hour, and minute.
- Press NEXT to move to the next setting or BACK to go back.
- Press AUTO to save and exit.
2. Programming Watering Schedules
The controller allows for up to six start times per day for each zone.
- Press the SCHEDULE button.
- The display will show the first available start time. Use + and - to set the desired start time. Press NEXT to confirm.
- Set the run time for each zone (1-4) using + and -. Press NEXT after each zone.
- After setting run times for all zones, you will be prompted to set the watering days.
- Choose your watering days:
- Custom Days: Select specific days of the week (e.g., M, W, F).
- Odd/Even Days: Water on odd or even calendar days.
- Cyclic: Water every 'X' days (e.g., every 3 days).
- Press AUTO to save the schedule and return to automatic operation.
3. Manual Operation
To manually water a zone or all zones:
- Press the MANUAL button.
- Use NEXT to select a specific zone or all zones.
- Use + and - to set the desired run time.
- The selected zone(s) will begin watering immediately.
- To stop manual watering, press the OFF button.
4. Seasonal Adjust
The Seasonal Adjust feature allows you to quickly increase or decrease watering duration for all zones by a percentage.
- Press the SEASONAL ADJUST button.
- Use + and - to adjust the percentage (e.g., 100% for normal, 50% for half, 150% for more).
- Press AUTO to save and exit.
5. Turning the Controller OFF
To stop all automatic watering, press the OFF button. The display will show 'OFF'. To resume automatic watering, press the AUTO button.
Figure 3: The controller's interface, designed for user-friendly programming.
Maintenance
1. Cleaning
Wipe the controller's exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the internal components.
2. Battery Replacement
Replace the 2 AAA batteries annually or when the low battery indicator appears on the display. This ensures program memory retention during power outages.
3. Winterization
In regions with freezing temperatures, it is crucial to winterize your irrigation system and controller:
- Disconnect the power transformer from the electrical outlet.
- Turn off the main water supply to the irrigation system.
- Drain all water from the irrigation lines and valves to prevent freezing and damage.
- The controller can remain mounted indoors, but ensure it is not exposed to extreme cold.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power; faulty transformer; dead batteries. | Check power outlet; ensure transformer is connected; replace AAA batteries. |
| Zones not watering | Controller in OFF mode; water supply off; wiring issue; faulty solenoid. | Press AUTO button; check main water valve; inspect wiring connections; test solenoid. |
| Specific zone not watering | Wiring issue for that zone; faulty solenoid for that zone. | Check wiring to the specific zone terminal; test or replace the solenoid. |
| Controller not responding to buttons | Temporary software glitch. | Disconnect power for 30 seconds, then reconnect. |
| Watering when it's raining | Rain sensor not connected or faulty; sensor override active. | Ensure rain sensor is properly connected and functioning; check controller settings for sensor override. |
Specifications
- Model: RZX4i
- Zones: 4
- Input Voltage: 120 Volts AC
- Display Type: LCD
- Operating Temperature: 15 Degrees Celsius (59 Degrees Fahrenheit)
- Item Weight: 1.76 pounds (0.8 Kilograms)
- Product Dimensions: 0.05 x 0.05 x 0.05 inches
- Batteries: 2 AAA batteries required (for program memory)
- Memory: Non-Volatile (100-year) program memory
- Master Valve/Pump Start: Yes
- Weather Sensor Input: Yes, with software override
Warranty and Support
Rain Bird products are manufactured to the highest 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 assistance, or to purchase replacement parts, please contact Rain Bird Customer Service through their official channels.
Rain Bird Official Website: www.rainbird.com
