1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Legrand LED Dimmer Pro 21/Galea, model 251028. Please read this manual thoroughly before installation and use to ensure safe and efficient operation of the device. This dimmer is designed for controlling various lighting loads, including incandescent, halogen, and dimmable LED lamps.
2. Safety Information
WARNING: Electrical shock hazard. Improper installation or use can lead to serious injury or death.
- Always disconnect power at the main circuit breaker or fuse box before installing, servicing, or removing the device.
- Installation must be performed by a qualified electrician in accordance with all national and local electrical codes.
- Do not exceed the specified maximum load ratings for the dimmer.
- Ensure all wire connections are secure and properly insulated.
- This device is for indoor use only.
- Do not attempt to repair or modify the dimmer. Refer all servicing to qualified personnel.
3. Product Overview
The Legrand LED Dimmer Pro 21/Galea (Model 251028) is a universal push-button dimmer designed for phase leading/trailing edge dimming. It features automatic load detection and a convenient memory function. This dimmer is compatible with a wide range of lighting types and offers flexible control options.
Image 1: Legrand LED Dimmer Pro 21/Galea module. This image shows the compact electronic module of the dimmer, typically installed within a wall box.
Key Features:
- Universal push-button dimmer for phase leading/trailing edge (3-400W).
- Automatic load detection for optimal performance.
- Auxiliary input for multiple conventional push-buttons, allowing for switching and dimming from various locations.
- Freely adjustable memory function: The last set light value is activated upon re-activation.
- Compatible with incandescent and HV halogen lamps (3-400W).
- Compatible with LV halogen lamps with conventional (iron core) or electronic transformers (3-400VA).
- Compatible with dimmable LEDs and compact fluorescent lamps (3-75W).
- Supports R, L, C load types (note: mixed load L+C is not suitable).
- 2-wire connection (without neutral conductor) for simplified installation.
- Designed for use with a compatible cover plate (not included).
4. Setup and Installation
IMPORTANT: Ensure power is disconnected before proceeding with installation.
- Preparation: Turn off the electrical power at the circuit breaker or fuse box for the circuit you are working on. Verify that the power is off using a voltage tester.
- Remove Existing Switch/Dimmer: Carefully remove the existing switch or dimmer from the wall box. Disconnect the wires.
- Wiring: Connect the Legrand LED Dimmer Pro 21/Galea according to the wiring diagram provided with the product packaging. This dimmer typically uses a 2-wire connection (Live In and Switched Live Out to the lamp). Ensure all connections are tight and secure. If using auxiliary push-buttons, connect them as per the specific wiring diagram for multi-way control.
- Mounting: Carefully place the dimmer module into the wall box. Ensure wires are not pinched. Secure the dimmer to the wall box using the provided screws.
- Attach Cover Plate: Install the decorative cover plate (not included) over the dimmer module.
- Restore Power: Turn the electrical power back on at the circuit breaker or fuse box.
- Test Functionality: Test the dimmer to ensure it operates correctly.
5. Operating Instructions
The Legrand LED Dimmer Pro 21/Galea is operated via a push-button mechanism.
- Switching On/Off: Briefly press the push-button to turn the lights on or off.
- Dimming: Press and hold the push-button to adjust the brightness level. Release the button when the desired brightness is reached. The dimmer will cycle through its brightness range.
- Memory Function: The dimmer is equipped with a memory function. When the lights are switched on, they will automatically return to the last set brightness level.
6. Maintenance
The Legrand LED Dimmer Pro 21/Galea requires minimal maintenance.
- Cleaning: To clean the dimmer's surface, use a soft, dry cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish.
- Internal Components: There are no user-serviceable parts inside the dimmer. Do not open the device.
- Regular Checks: Periodically check for any loose connections or signs of damage. If any issues are observed, disconnect power and consult a qualified electrician.
7. Troubleshooting
If you encounter problems with your dimmer, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights do not turn on. |
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| Dimmer does not respond to input. |
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| Lights flicker or hum. |
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If the problem persists after attempting these solutions, contact a qualified electrician or Legrand customer support.
8. Specifications
| Model Number: | 251028 |
| Product Dimensions (L x W x H): | 10 x 10 x 10 mm |
| Operating Voltage: | 230 Volts |
| Current Rating: | 1 A |
| Load Type: | Universal (R, L, C) - Note: L+C mixed load not suitable |
| Load Capacity (Incandescent/HV Halogen): | 3 - 400 W |
| Load Capacity (LV Halogen with Transformer): | 3 - 400 VA |
| Load Capacity (Dimmable LEDs/CFLs): | 3 - 75 W |
| Connection Type: | 2-wire (without neutral conductor) |
| Control Type: | Push-button |
| Material: | Plastic |
| Mounting Type: | Surface Mount |
9. Warranty and Support
For warranty information, technical support, or service inquiries regarding your Legrand LED Dimmer Pro 21/Galea, please contact your authorized Legrand dealer or visit the official Legrand website. Keep your purchase receipt as proof of purchase for any warranty claims.
Legrand is committed to providing high-quality products and customer satisfaction. Do not attempt to open or repair the device yourself, as this may void the warranty.
