Introduction
This manual provides essential information for the installation, operation, and maintenance of your De Dietrich 7649289 Smart TC Room Thermostat. Please read these instructions carefully before using the device to ensure safe and efficient operation.
Package Contents
Before proceeding with installation, verify that all components are present in the package:
- Smart TC Room Thermostat Unit
- Receiver Unit (for boiler connection)
- Power Adapter (for Receiver Unit)
- Mounting Hardware (screws, wall plugs)
- User Manual (this document)
Setup
1. Unpacking and Initial Inspection
Carefully remove all components from the packaging. Inspect each item for any signs of damage. If any part is damaged or missing, do not proceed with installation and contact customer support.
2. Mounting the Thermostat Unit
The Smart TC Room Thermostat unit is designed for wall mounting. Choose a central location in the room, away from direct sunlight, drafts, or heat sources (e.g., radiators, lamps) that could affect temperature readings. The recommended height is approximately 1.5 meters (5 feet) from the floor.
- Separate the front display unit from its backplate.
- Position the backplate on the wall at the desired height and mark the drilling points.
- Drill holes using an appropriate drill bit for your wall type. Insert wall plugs if necessary.
- Secure the backplate to the wall using the provided screws.
- Attach the front display unit to the secured backplate.
Image: The De Dietrich Smart TC Room Thermostat unit mounted on a wall in a kitchen environment. The display shows a temperature of 19.5°C.
3. Connecting the Receiver Unit
The Receiver Unit connects to your boiler and communicates wirelessly with the Thermostat Unit. It requires a 230 Volt power supply.
- Safety First: Before connecting, ensure the main power supply to your boiler and heating system is switched OFF at the circuit breaker.
- Mount the Receiver Unit near your boiler, ensuring it is within range of the Thermostat Unit.
- Connect the Receiver Unit to your boiler's control terminals according to your boiler's specific wiring diagram. Consult a qualified electrician or heating engineer if you are unsure.
- Plug the provided power adapter into the Receiver Unit and then into a standard 230V wall socket.
- Restore power to your heating system.
Image: The De Dietrich Smart TC Room Thermostat display unit (left) and the separate receiver unit with its power adapter (right). The receiver unit connects to the boiler, while the thermostat unit controls it wirelessly.
4. Initial Pairing and Configuration
Once both units are powered, they should automatically attempt to pair. Follow the on-screen prompts on the Thermostat Unit to complete the initial setup, which may include:
- Language selection
- Date and time setting
- Wi-Fi network connection (if applicable for smart features)
- Confirmation of successful connection to the Receiver Unit.
Operating Instructions
1. Display Overview
The thermostat's display shows the current room temperature, the set target temperature, operating mode, and connectivity status. Specific icons will indicate heating activity, Wi-Fi connection, and battery level.
2. Basic Controls
The thermostat features intuitive controls:
- Central Dial/Buttons: Used to navigate menus and adjust settings.
- Up/Down Arrows: Typically used to increase or decrease the target temperature.
- Mode Button (if present): To switch between different operating modes (e.g., Auto, Manual, Away).
3. Adjusting Temperature
To change the desired room temperature:
- Press the central dial or an arrow button to activate the display.
- Use the Up or Down arrows to set your desired temperature. The new setting will be displayed prominently.
- The thermostat will automatically adjust the heating to reach and maintain this temperature.
4. Programming Schedules
The De Dietrich Smart TC is a programmable thermostat, allowing you to set custom heating schedules for different times of the day and days of the week.
- Access the 'Schedule' or 'Program' menu via the central dial.
- Select the day(s) you wish to program.
- Set desired temperatures for specific time blocks (e.g., morning, day, evening, night).
- Save your program. The thermostat will now follow this schedule automatically.
5. Smart Features and Amazon Alexa Integration
This thermostat supports smart home integration, including compatibility with Amazon Alexa. To enable voice control and remote access:
- Ensure your thermostat is connected to your home Wi-Fi network (refer to Initial Configuration).
- Download the official De Dietrich Smart TC app on your smartphone or tablet.
- Follow the app's instructions to create an account and add your thermostat.
- In the Amazon Alexa app, enable the 'De Dietrich Smart TC' skill.
- Link your De Dietrich account with Alexa. You can now control your thermostat using voice commands (e.g., "Alexa, set the thermostat to 21 degrees").
Maintenance
1. Cleaning
To maintain the appearance and functionality of your thermostat:
- Wipe the display and casing with a soft, dry, or slightly damp cloth.
- Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the surface and internal components.
2. Battery Replacement (Thermostat Unit)
The Thermostat Unit is battery-powered. When the battery level is low, an indicator will appear on the display. Replace batteries promptly to ensure continuous operation.
- Gently detach the Thermostat Unit from its wall-mounted backplate.
- Locate the battery compartment on the rear of the unit.
- Remove the old batteries and dispose of them according to local regulations.
- Insert new batteries, ensuring correct polarity.
- Reattach the Thermostat Unit to its backplate.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat display is blank. | Dead batteries in Thermostat Unit. | Replace batteries in the Thermostat Unit. |
| Heating not turning on/off. | Receiver Unit not powered or not paired. | Check power to Receiver Unit. Re-pair Thermostat and Receiver Units if necessary. Ensure boiler power is on. |
| Incorrect temperature reading. | Thermostat placed near heat source/draft. | Relocate thermostat to a more suitable position. |
| Cannot connect to Wi-Fi/Alexa. | Incorrect Wi-Fi password, router issues, or skill not enabled. | Verify Wi-Fi password. Restart router. Ensure 'De Dietrich Smart TC' skill is enabled in Alexa app. |
Specifications
- Model Number: 7649289
- Dimensions (Thermostat Unit): 2.9 x 12.1 x 9 cm
- Weight: 1 kg
- Power Type (Thermostat Unit): Battery
- Power Type (Receiver Unit): 230 Volt
- Color: Black, Grey
- Special Features: Programmable, Amazon Alexa Compatible
- Usage: Boiler Control
Warranty and Support
Warranty Information: This product comes with a standard manufacturer's warranty. Please refer to the warranty card included in your product packaging or visit the official De Dietrich website for detailed terms and conditions.
Customer Support: For technical assistance, troubleshooting not covered in this manual, or warranty claims, please contact De Dietrich customer support. Contact details can typically be found on the official De Dietrich website or in your product documentation.





