1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your Resideo Honeywell Home 2-Channel Wireless Relay Module, model R6H911RF4018. This module is designed to work with the Lyric T6R system, enabling wireless control capabilities for your heating system.
Please read this manual thoroughly before attempting installation or operation to ensure proper use and to prevent damage to the device or property.
2. Safety Information
- Electrical Safety: Installation should only be performed by a qualified electrician or competent person in accordance with national wiring regulations. Always disconnect power before working on electrical connections.
- Product Use: Use this device only for its intended purpose as a wireless relay module for compatible heating systems. Do not use it for any other application.
- Environment: Do not expose the device to extreme temperatures, humidity, or direct water contact. Ensure adequate ventilation around the unit.
- Disposal: Dispose of the product and its packaging in accordance with local environmental regulations. Do not dispose of with general household waste.
3. Package Contents
Verify that all items are present in the package:
- Resideo Honeywell Home 2-Channel Wireless Relay Module (Model R6H911RF4018)
- Mounting screws and wall plugs
- Quick Start Guide (if applicable)

Image 1: Front view of the Resideo Honeywell Home 2-Channel Wireless Relay Module. This image shows the compact, white, round-shaped device, which serves as a wireless receiver for heating control systems.
4. Installation and Setup
This section outlines the general steps for installing and setting up your wireless relay module. For detailed wiring diagrams and specific instructions, refer to the separate installation guide provided with your Lyric T6R system or consult a qualified professional.
- Power Disconnection: Before beginning any electrical work, ensure that the main power supply to your heating system is switched off at the consumer unit/fuse box.
- Mounting: Choose a suitable location for the relay module, typically near your boiler or heating control center. Mount the module securely to a wall using the provided screws and wall plugs. Ensure it is not exposed to excessive heat or moisture.
- Wiring: Connect the relay module to your heating system according to the wiring diagram specific to your boiler and the Lyric T6R system. This typically involves connecting power supply, boiler control, and potentially other inputs/outputs.
- Power On: Once all wiring is complete and secure, restore power to your heating system.
- Pairing: Follow the instructions provided with your Lyric T6R thermostat to pair the wireless relay module. This usually involves putting both devices into a pairing mode.
- Testing: After successful pairing, test the functionality of the system by adjusting the thermostat and verifying that the relay module correctly controls the heating system.
5. Operation
The Resideo Honeywell Home 2-Channel Wireless Relay Module operates as a receiver for commands sent from your Lyric T6R thermostat. It does not have user-operable controls directly on the unit itself.
- Receiving Commands: The module receives wireless signals from the Lyric T6R thermostat, which dictate when to switch your heating system on or off, or to control other connected zones/channels.
- Indicator Lights: The module may feature LED indicator lights to show its status, such as power, wireless connection, and relay activation. Refer to the Lyric T6R manual for interpretation of these indicators.
- Manual Override (if applicable): Some relay modules may have a manual override button for emergency operation. Consult your specific model's documentation to determine if this feature is present and how to use it.
6. Maintenance
The Resideo Honeywell Home 2-Channel Wireless Relay Module requires minimal maintenance.
- Cleaning: Gently wipe the exterior of the module with a soft, dry cloth. Do not use abrasive cleaners, solvents, or wet cloths, as these can damage the unit.
- Inspection: Periodically check the module for any visible signs of damage or loose connections. If any issues are found, disconnect power and consult a qualified technician.
- Firmware Updates: Ensure your Lyric T6R system and connected components, including the relay module, are running the latest firmware versions for optimal performance and security. Updates are typically managed through the Lyric T6R thermostat or its associated app.
7. Troubleshooting
If you encounter issues with your wireless relay module, consider the following troubleshooting steps:
- No Power:
- Check the main power supply to the heating system and the module.
- Verify all wiring connections are secure and correct.
- No Wireless Connection / Pairing Issues:
- Ensure the Lyric T6R thermostat and the relay module are within range of each other.
- Repeat the pairing procedure as described in the Lyric T6R manual.
- Check for potential sources of wireless interference (e.g., other wireless devices, thick walls).
- Heating Not Responding:
- Verify the thermostat is calling for heat.
- Check the status indicator lights on the relay module.
- Ensure the boiler or heating appliance is powered on and functioning correctly.
- Persistent Issues: If problems persist after attempting these steps, contact Resideo customer support or a qualified heating engineer.
8. Specifications
| Brand: | Resideo |
| Model Number: | R6H911RF4018 |
| Product Type: | 2-Channel Wireless Relay Module |
| Compatibility: | Lyric T6R Thermostat |
| Color: | White |
| Style: | Modern |
| Shape: | Round |
| Specific Use: | Home heating control |
| Included Components: | Wireless Relay Module (main unit) |
9. Warranty and Support
Specific warranty information for the Resideo Honeywell Home 2-Channel Wireless Relay Module (R6H911RF4018) is not provided in this document. Please refer to the warranty card included with your product or visit the official Resideo website for detailed warranty terms and conditions.
For technical support, product registration, or further assistance, please visit the official Resideo support website or contact their customer service department. Contact details can typically be found on the product packaging or the manufacturer's website.







