1. Introduction
Thank you for choosing the Beok TRV-M2Z Zigbee Smart Radiator Thermostat. This intelligent radiator thermostat is designed to provide efficient temperature control for water-heated radiators, helping to reduce energy waste and save on heating costs while maintaining a comfortable environment.
The device is battery-powered, wiring-free, and easy to install. Once connected to the Tuya Smart APP via a Zigbee gateway, users can remotely select operating modes, set temperatures, activate child lock, and enable frost protection functions. Any manual adjustments made directly on the device will also be reflected in the Tuya Smart APP.
2. Main Features
- Multiple Working Modes: Offers 8 distinct working modes including programming mode, manual mode, temporary programming mode, holiday mode, comfort mode, and energy-saving mode.
- Clear LED Display: Features a built-in large-front LED display screen for easy viewing of settings and current status.
- Low Power Consumption: Designed for efficiency, the battery endurance period typically lasts for one heating season.
- Zigbee Wireless Protocol: Utilizes the Tuya Zigbee wireless communication protocol for safe, reliable, and convenient connectivity.
- Frost Protection: Automatically prevents pipes from freezing in cold conditions.
- Child Lock: Prevents unauthorized changes to settings.
- Window-Opening Detection: Automatically detects open windows to prevent heat loss.
- Voice Control: Supports integration with voice assistants like Amazon Alexa and Google Assistant.
3. Technical Specifications
| Feature | Specification |
|---|---|
| Power Supply | 3 x 1.5 V AA alkaline batteries (not included) |
| Standby Current | 6μA Min |
| Protection Degree | IP20 |
| Ambient Temperature | 0°C to 50°C |
| Surface Temperature | 90°C Max (at the radiator) |
| Set Temperature Range | 5°C to 35°C |
| Accuracy | ±0.5 °C |
| Connection | M30 x 1.5mm |
| Linear Travel | 6mm |
| Dimensions (W x H x D) | 54mm x 89mm x 54mm |
| Weight | 139g |
| Zigbee Function | Requires connection to a Tuya Zigbee gateway |
| Child Lock | Yes |
| Anti-Scale Function | Yes |
4. Setup and Installation
4.1. Device Overview
Familiarize yourself with the components of your TRV-M2Z thermostat:

Image: Device overview showing the middle button, knob button, display icons for holiday mode, child lock, heating, network configuration, antifreeze, comfort mode, energy-saving mode, room temp/set temp, manual mode, auto mode, and the union nut for the heating valve. Dimensions are 54mm width and 89mm height.
4.2. Battery Installation
The TRV-M2Z is powered by 3 AA alkaline batteries (not included).
- Pull the knob in the direction of the arrow (upwards) with your hand to detach the top cover.
- Pull out the shell by sliding it in the direction of the arrow.
- Refer to the polar direction indicated in the battery tank to load 3 AA alkaline batteries.
- Install the shell and knob back into the marked position to complete the installation.

Image: Diagram illustrating the battery compartment and the use of 3 AA alkaline batteries (not included).
4.3. Adapter Installation (if required)
Ensure the correct adapter is used for your radiator valve type. The TRV-M2Z comes with various adapters for common valve types.

Image: Visual guide for installing adapters for Danfoss, Caleffi, Giacomini, and M28 valves, showing specific dimensions for each.
4.4. Device Mounting on Radiator Valve
You can install your temperature controller in three steps:
- Before mounting the temperature controller on the valve, ensure batteries are loaded as per the polar direction. You should feel a slight vibration as the temperature controller enters automatic detection mode.
- Align the interface nut of the temperature controller with the heat radiator valve.
- While slightly pushing forward, clockwise rotate the interface nut until it is tightened, with a maximum torque of 5N·m. After approximately 10 seconds, the current temperature will be displayed, indicating successful mounting.
To minimize the influence of the radiator's own heat on the temperature controller, it is suggested to mount it as shown in the diagram below (horizontally if possible).

Image: Diagram showing the TRV mounted on a radiator valve, illustrating two possible display orientations (upright and inverted).
4.5. Automatic Detection
After the temperature controller is mounted, the system will automatically adjust according to the set program. During this process, the temperature controller may perform voluntary and repeated heating/cooling cycles, which are part of the automatic detection process.
During specific running periods, the temperature controller will switch off the radiator valve, then open it again to detect the exact opening position of the valve. This function ensures efficient heat utilization and accurate temperature control.
If necessary, remove the batteries, wait for 30 seconds, then reload them to reactivate mounting mode. This will force the temperature controller to run the automatic detection function. During this process, the temperature control valve will display "LA".

Image: Schematic diagrams of Valve A and Valve B mounting for automatic detection.
4.6. Network Configuration (Tuya Smart APP)
The TRV-M2Z requires a Tuya Zigbee gateway for smart functionality.
4.6.1. Preparation: Download and Register APP
- Download APP:
- For iOS: Search "Tuya Smart" in the App Store.
- For Android: Search "Tuya Smart" in Google Play.
- Alternatively, scan the QR code below to download the app.
- Register Account:
- If you don't have an account, choose to register via SMS verification code.
- Click "Create a new account", agree to the Privacy Policy, and proceed with mobile phone registration.
4.6.2. Connecting to the Gateway
- Enable Bluetooth & Wi-Fi: Turn on your mobile phone's Bluetooth and connect to your 2.4Ghz Wi-Fi network. Ensure your Wi-Fi name and password contain only numbers and letters (no special symbols).
- Power On Gateway: Power on your Zigbee gateway and ensure it is in the pending configuration state.
- Add Device in Tuya APP:
- Open the Tuya Smart APP.
- Click "Add Device" or the "+" icon in the upper right corner of the homepage.
- Navigate to the "Add Device" interface and find "Wireless Gateway (Zigbee)" under "Gateway Control".
- Confirm your 2.4Ghz Wi-Fi information (it should auto-fill if connected).
- Re-confirm that your gateway is in pending configuration state and follow the on-screen instructions (e.g., confirm indicator blinking).
- Wait for the connection to complete.
4.6.3. Adding Thermostatic Valve Equipment
- TRV Pairing Mode: With the TRV powered off, press and hold the middle button for 3 seconds. The blinking Wi-Fi symbol will appear on the screen, indicating the TRV is in pending pairing state.
- Add Subdevice in APP:
- On the main page of your connected gateway in the Tuya APP, click "Add subdevice".
- Follow the on-screen instructions to add the thermostatic valve equipment.
- Wait a few seconds for the device to be added successfully.

Image: Screenshot of the Tuya Smart app interface showing remote control of the Zigbee Thermostatic Radiator.
5. Operating Instructions
5.1. Power On/Off
- Power On: Short press the middle button or turn the knob in the direction of increasing the parameter.
- Power Off: Short press the middle button several times until "OF" appears. Then, turn the knob until the set temperature value is minimized, and turn the knob again in the direction of the minus parameter. "OF" will appear on the screen.
5.2. Display Flip Function
Under power-on condition, set the temperature to 35°C, then press and hold the middle button for 3 seconds to flip the screen orientation to suit your reading habits.
5.3. Switching Modes
Short press the middle button to cycle through the following modes:
- Manual Mode: The thermostatic valve operates only according to the manually set temperature and will not switch at different times.
- ECO Mode: Energy-saving mode. Default temperature: 17°C.
- Antifreeze Mode: Prevents freezing. Default temperature: 8°C.
- Programming Mode (Auto Mode): Automatically switches to the needed temperature as per different time slots. Settings for each time slot must be configured in the Tuya APP. Example: 16°C for 8:00 (leaving home), 22°C for 17:00 (at home), 16°C for 22:00 (after sleep).
- Comfort Mode: Provides a comfortable temperature setting. Default temperature: 21°C.
- Holiday Mode: Maintains a set temperature during holiday periods. Default temperature: 12°C.
- Temporary Mode: If you manually change the set temperature in automatic mode, the device will run at this manually set temperature and resume programming mode when the next programmed time point is reached.
The default temperature values for ECO, Antifreeze, Comfort, and Holiday modes can be adjusted in the Tuya APP.

Image: Screenshot of the Tuya Smart app showing the daily programmable schedule interface for the Zigbee model.
5.4. Child Lock Function
In the power-on state, long press the middle button to activate or deactivate the child lock function. When activated, direct manipulation of the device controls will be prevented.
5.5. Frost Protection Function
This function can be turned on or off in the Tuya APP. When activated, if the device is off and the room temperature drops below 5°C, the valve will open to heat the room until the temperature rises to 8°C, then the valve closes and stops heating.
5.6. Window-Opening Detection Function
This function can be turned on or off in the Tuya APP. When activated, the device automatically identifies if a window is open. If cold air is detected and the temperature drops by more than 3°C within 5 minutes, the function activates, and the device stops heating to prevent energy waste.
The window-opening detection function will terminate if:
- The detected temperature rises by 3°C.
- No operation is performed on the APP or device within 48 minutes.
- A temperature setting operation is performed on the device.

Image: Diagram illustrating the open window detection feature, showing how the heater turns off if room temperature drops by 3°C in 5 minutes. It also indicates conditions to turn off window opening mode.
5.7. Voice Control
The TRV-M2Z supports voice control through Amazon Alexa and Google Assistant when connected to the Tuya Smart ecosystem.

Image: Illustration of voice control functionality with Amazon Alexa and Google Assistant, showing a user interacting with a smart speaker to set temperature.
6. Maintenance
6.1. Anti-Scale Function
To prevent valve blockage due to excessive scale, if the cooling fin's valve is not fully opened at least once within two weeks, the controller will automatically open the valve completely for 30 seconds every two weeks. This ensures the cooling fin remains functional.
6.2. Restore Factory Settings
In the power-off state, press the middle button 4 times quickly and continuously. The screen will display "--" to indicate a successful reset to factory settings.
7. Troubleshooting
| Error Code | Problem |
|---|---|
| E1 | Stroke fault detection (Ensure the device is correctly installed on the valve) |
| E2 | Low battery (Replace the batteries) |
| E3 | Temperature sensor abnormality |
| E4 | Reminder to open the window (Window-opening detection activated) |
| E5 | Indoor low temperature alarm |
8. User Tips
- Compatibility: This TRV is designed for water-heated radiators. While some users inquire about electric boilers or warm floors, its primary function is for radiator control. For specific boiler compatibility, consult your boiler's manual or a qualified technician.
- Voice Assistant Integration: The TRV-M2Z is compatible with Amazon Alexa and Google Assistant through the Tuya Smart ecosystem. Ensure your Tuya account is linked to your voice assistant platform.
- Tuya Pairing: For detailed instructions on pairing with the Tuya Smart APP and your Zigbee gateway, please refer to the "Network Configuration" section (4.6) of this manual.
- Battery Life: To maximize battery life, consider using high-quality alkaline batteries and avoid frequent manual adjustments if programmable modes meet your needs.
9. Support and Further Information
If you encounter any problems during the use of this product, please feel free to contact the seller or manufacturer through your purchase platform. They will provide assistance and support.
For a complete digital version of this manual and additional resources, you may refer to the official PDF document: View User Manual (PDF).