Product Overview
Introduction
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Product Name |
SONOFF Zigbee Thermostatic Radiator Valve |
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Product Model |
With the SONOFF Thermostatic Radiator Valve, you can control and reach the temperature you want more accurately. It allows remote control and timing. The window opening detection function helps you save energy and avoid additional energy waste. The matching adapters can be installed on almost any valve.
Highlights
- Smart Control
SONOFF Zigbee Thermostatic Radiator Valve supports full smart functions, including remote control via app, voice commands, scheduling, and group management. - Open Window Detection
Automatically shuts off the radiator during ventilation to prevent energy waste. - Zigbee 3.0 Standard Compatible
Compatible with Zigbee 3.0 hubs such as SONOFF iHost, NSPanel Pro, ZB Bridge Pro, ZBDongle-P, and ZBDongle-E, as well as any Zigbee 3.0-compliant hubs. - Broad Heating System Compatibility
Fits standard 'M30 x 1.5mm' radiator valves; includes adapters compatible with most heating systems and manufacturers. - Comprehensive Features
Child lock prevents accidental changes by kids. Frost protection avoids pipe freezing and bursting. Supports 6 months of historical data, enabling you to optimize heating schedules based on usage trends.
Applications
- Room-by-room heating control: set individual temperatures per radiator—for example, raise bedroom temp to 22 °C in the morning and reduce to 18 °C at night.
- Energy savings & automation: open-window detection stops heating when a window is opened; schedule heating only when needed.
Specification
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Model |
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Input |
4.5V ⎓ (3x1.5V AA Batteries) |
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Battery model |
1.5V LR6 Alkaline AA Battery |
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Wireless connection |
Zigbee 3.0 |
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Threaded connection |
M30x1.5mm |
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Temperature setting range |
4℃-35℃ |
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Working temperature |
0℃-60℃ |
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Working humidity |
5%-95% RH Non-condensing |
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Color |
White |
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Casing material |
PC |
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Product dimension |
58.4x58.4x94mm |
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Disconnection means |
Type 1B |
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Pollution degree |
2 |
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Rated impulse voltage |
500V |
Key Features
eWeLink Platform
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Notice: This functionality is available only when the device is paired with the eWeLink app. For capabilities when the device is paired via Matter with Alexa, Google Home, or other platforms, refer to Key Features >> Compatible Zigbee Hubs List |
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Device Home Page Functions |
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Key Features |
Feature Description |
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Device Status |
Current operating status of the device:
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Temp. |
The temperature detected by the device. |
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Battery level |
The current battery level of the device. |
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Manual Temp. Adjustment |
Set the target temperature for scheduled or maintained heating. |
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Operation Mode |
Switch the current working mode of the device:
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Smart Schedule |
Set heating time periods within a 24-hour day for the device, including:
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Statistics |
Records of device status changes. |
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Device Settings |
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Key Features |
Feature Description |
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Third-party Platforms |
Alexa |
Set or query the working mode and temperature. |
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Google Home |
Set or query the working mode and temperature. |
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SmartThings |
Set the working mode and temperature. |
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Alice |
Set or query the working mode and temperature. |
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IFTTT |
Trigger: Current Temperature, Thermostat status |
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Assign location |
Set up the home and room where the device is located. |
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Create Group |
After multiple devices are created into a group, you can synchronize all devices in the group. |
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Temp. Calibration |
The temperature readings of the device can be adjusted for calibration. |
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Child Lock |
When enabled, the device knob will be disabled to prevent accidental operation by children. Control is only available through the app.
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Open Windows Detection |
When enabled, the device operates based on the following logic:
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Anti-freeze Mode |
Modify the temperature threshold for Anti-freeze Mode. |
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Temp. Display from External Sensor |
Select another temperature sensor under the same eWeLink account as the temperature reference for the valve. *Now support: SNZB-02, SNZB-02D, SNZB-02P |
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Valve Opening Percentage |
Adjust the valve opening or closing percentage:
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Smart Scene |
Trigger Condition |
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Execution Action |
Unsupport being the smart scene execution device. |
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Delete Device |
Remove the device from the eWeLink platform. |
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Compatible Zigbee Hubs List
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Platform |
eWeLink |
Home Assistant via ZHA |
Home Assistant via Z2M |
Alexa |
SmartThings |
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Zigbee Hub |
ZBBridge |
ZBBridge-P ZBBridge-U, NSPanel Pro, iHost |
ZBDongle-P/-E |
ZBDongle-P/-E |
Amazon Echo (Plus 2nd, Echo 4th, Show 2nd) |
Samsung SmartThings Hub V3 / Aeotec V3 |
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Operation Mode |
√ |
√ |
√ |
√ |
√ |
√ |
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Manual Temp. Adjustment |
× |
√ |
× |
√ |
√ |
× |
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Temp. Calibration |
× |
√ |
× |
√ |
× |
× |
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History Record |
√ |
√ |
√ |
√ |
× |
√ |
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Local Scene |
× |
√ |
√ |
√ |
× |
√ |
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OTA |
× |
√ |
√ |
√ |
× |
× |
Notice:
- If the device fails to be added to the above Zigbee gateway, please update the gateway to the latest version.
- Philips gateway, IKEA gateway, and Fritzbox gateway are not supported.
Installation and Configuration Guide
① Middle button
② Rotary knob
③ Auto Mode
④ Heating indicator
⑤ Target temperature
⑥ Internet connection
⑦ Low battery
⑧ Configuration key (under the dismountable shell)
⑨ Heating valve interface
⑩ Battery case latch
Screen display and introduction
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Screen display |
Introduction |
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Window opening function The device will automatically identify whether the window is opened after you enter the app interface to enable the window opening detection function. When cold air is detected and the temperature drops more than 1.5 °C within 4.5 minutes, the window opening function will be enabled. Alongside the enabling of the function, the screen displays “OP” and the temperature is set at 12 °C. Note: After the window opening function is enabled, the following operations will disable the window opening function: 1. Temperature setting operation on App or device 2. Temperature rises by more than 1.5℃ within 4.5 minutes 3. No operation on App or device within 30 minutes. |
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Anti-calcification function The temperature control valve will perform a routine calcium removal operation at 12:00 am every Monday to prevent calcification of the valve. During the operation, the screen will display "CA". |
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Child lock function Press “Middle button” for 3 seconds, then the screen will display “LC”, with child lock enabled. After the screen is locked, press “Middle button” for 3 seconds, then the “LC” on the screen will disappear, with child lock disabled. |
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When heating is not needed in winter, turn knob counterclockwise
Note: After the antifreeze function is enabled when the room temperature is below 5 °C, the function will be enabled to prevent the radiator from being damaged by freezing. The function will be disabled when the room temperature exceeds 7 °C. |
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Low battery (Battery needs to be replaced with a new one within 1 week) |
Power On the Device
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① Press the battery compartment latch while taking out the shell. |
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② Load the battery. |
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③ After powering on, the screen displays |
Installation
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When
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If the screen displays "F5 " or " Ad ", press the middle button and |
Device Debugging
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Short press the middle button, and " Ad" will flash (Figure ①). Wait for about 5 seconds, and the device will display the initialization interface (Figure ②), which means that debugging is completed. |
Add Device
eWeLink Platform
Download the eWeLink App & Add SONOFF Zigbee Gateway.
Open eWeLink to scan the QR code on the Quick Guide or the device itself to add the device.
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In manual mode, turn the knob counterclockwise. When the screen displays " OF ", press and hold the middle button for 3 seconds and the screen icon |
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If the device fails to pair with the gateway within 3 minutes after it enters Pairing mode, the device will exit the pairing status. If you want to pair again, please press and hold the middle button for 3 seconds until the icon " OF" flashes when the screen shows |
Compatible Third-party Platform
If you're using a third-party Zigbee gateway, please refer to the corresponding app for detailed instructions on how to add the device.
Temperature Control Mode
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The device supports auto mode and manual mode. Shortly press "Middle button" to switch between the two modes.
*Device pairing operation must be done in manual mode. |
Screen display rotation
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① Dismount the shell ② Press "Configuration key" for 3 seconds to change the screen display direction. |
Factory Reset
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Press "Middle button" for a longer time and at the same time put batteries in, then the screen displays "FA" and blinks for 3 seconds. After that, the device is reset to factory settings and is automatically restarted. Note: All previous settings will be removed after the device is reset to factory settings. |
Error Codes, Problems and Solutions
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Error code |
Problem |
Solution |
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F0 |
Abnormal temperature sensor |
Contact the after-sales staff |
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F1 |
Slow valve operation |
Check the installation status and heating valve |
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F2 |
Excessively wide adjustment range |
Check whether the temperature controller is fastened |
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F3 |
Excessively small adjustment range |
Check the heating valve |
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F4 |
The battery runs out |
Replace battery |
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F5 |
No valve detected |
Check whether the valve is installed |
FAQ
- How to check if my valve is suitable for TRVZB?
Please refer to the following document to check valve compatibility:
https://sonoff.tech/wp-content/uploads/2024/12/SONOFF_TRV-Compatibility-Guide-20241202.pdf - What is the battery life of the device?
TRVZB does not come with batteries in the package; you need to purchase three 1.5V AA batteries separately. The device's battery life depends on factors such as battery capacity and usage environment. Ordinary batteries can generally last for more than six months. - The controlled temperature is inaccurate, always too low/high?
Possible causes are as follows:
- The device is installed on a hot water valve, and the temperature measured by the device is easily affected by the water temperature, causing it to be too high. In this case, consider calibrating the temperature value.
- If the thermostatic valve is far from the usual activity area, consider using an external temperature source to detect the target temperature.
- Can rechargeable batteries be used?
AA rechargeable batteries (e.g., nickel-metal hydride) have a voltage of only 1.2V. When three are connected in series, the voltage is slightly higher than the minimum operating voltage of the device, but even fully charged, they cannot maintain long-term use.
Troubleshooting
- Can't turn off the water valve?
Please check if an adapter is used.
If an adapter is used, first verify whether the adapter is suitable. Use tools (do not use hands to avoid scalding) to press the adapter and check if the water valve can be closed completely.
If no adapter is used or the adapter is verified as usable, remove the calibrated device, adjust the temperature, and observe whether the black cylinder at the bottom moves with the heating state switching.
- If the cylinder moves, it may indicate the water valve is incompatible (exceeding the maximum pushing force or distance of the device) or the valve is rusted, making it difficult to push.
- If the cylinder does not move, it may be a valve type not covered by the device's calibration algorithm. Please upgrade the firmware to version 1.1.6 or higher.
- Inaccurate battery level display?
The old firmware has insufficient battery detection accuracy, which may cause abnormal low battery prompts (F4 error) or low battery level reporting. If you encounter this issue, please update to the latest firmware promptly. - ZHA can only adjust the calibration by ±2.5℃ at most?
This is due to an outdated ZHA version that does not support calibration adjustment in the graphical interface. The 2024.3 version of HA has fixed this issue. After updating to an HA version not lower than 2024.3, you can adjust the calibration by ±7℃ via the slider.