1. Introduction
The WENZHI BHT-009 Matter Smart Heating Thermostat is designed to provide intelligent temperature control for various heating systems. This versatile device is compatible with electric underfloor heating, water heating, and water/gas boiler systems, making it suitable for commercial, industrial, civil, and domestic properties. It integrates seamlessly with smart home ecosystems like Tuya Smart Life, Amazon Alexa, Google Home, and Apple HomeKit, offering multiple control options including touch buttons, a rotating dial, smartphone app, and voice commands.
Figure 1: WENZHI BHT-009 Matter Smart Heating Thermostat (Black and White models)
2. Package Contents
Please check the package for the following items:
- Thermostat: 1 pc
- Screws: 2 pcs
- User Guide: 1 pc
- QC Passed Certificate: 1 pc
- Floor Sensor: 1 pc (Optional, included only with electric floor heating models)
3. Technical Specifications
| Feature | Specification |
|---|---|
| Model Number | BHT-009 Matter |
| Voltage | 220V |
| Current Load | 5A (Water Heating, Water/Gas Boiler), 16A (Electric Heating) |
| Sensor | NTC3950, 10K |
| Accuracy | ±1°C |
| Set Temperature Range | 5-35°C |
| Room Temperature Range | 5-70°C |
| Display Temperature Range | 5 ~ 70°C |
| Ambient Temperature | 0~ 45°C |
| Ambient Humidity | 5 ~ 95 % RH (Non Condensing) |
| Storage Temperature | -5~ 45°C |
| Power Consumption | <1.5W |
| Timing Error | < 1% |
| Shell Material | PC + ABS (Fireproof) |
| Installation Box | 86 x 86mm Square or European 60mm Round Box |
| Wire Terminals | Wire 2 x 1.5 mm² or 1 x 2.5 mm² |
| Buttons | Knob + Capacitive Touch Buttons |
| Certification | CE, RoHS |
| Origin | Mainland China |
Figure 2: Thermostat Dimensions
4. Installation
4.1 Safety Precautions
CAUTION: Electrical Shock or Equipment Damage Hazard. Disconnect power supply before installation to prevent electric shock or short circuits.
4.2 Wiring Diagrams
The BHT-009 Matter thermostat comes in three main models, each designed for a specific heating system. Ensure you use the correct wiring diagram for your model (GA, GB, or GC).
Figure 3: Wiring Diagrams for GA (Water Heating), GB (Electric Floor Heating), and GC (Gas Boiler)
- GA (Water Heating): Connects to water heating systems.
- GB (Electric Floor Heating): Connects to electric floor heating systems.
- GC (Gas Boiler): Connects to gas boiler systems.
Refer to the specific connections shown in the diagram. The thermostat requires an AC95-240V power supply. Use wires of 2 x 1.5 mm² or 1 x 2.5 mm² for terminals.
Figure 4: Compatible Heating Systems
4.3 Mounting
The thermostat is designed to fit into a standard 86 x 86mm square or European 60mm round installation box. Secure the thermostat to the wall box using the provided screws after completing the wiring.
5. Initial Setup and Smart Home Integration
5.1 App Pairing (Tuya Smart Life)
To connect your thermostat to the Tuya Smart Life app:
- Ensure your home Wi-Fi network is 2.4GHz.
- Download the "Smart Life" app from your smartphone's app store.
- Open the app and follow the on-screen instructions to add a new device.
- Scan the QR code located on the back of the thermostat or use the app's Bluetooth pairing function to discover the device.
- Follow the prompts in the app to complete the connection to your Wi-Fi network.
Figure 5: Scanning QR code for Smart Life App Pairing
5.2 Matter Protocol Integration (Alexa, Google Home, HomeKit)
The BHT-009 Matter thermostat supports direct connection via app scan to Matter-compatible smart home ecosystems, eliminating the need for a separate gateway.
- For Amazon Alexa and Google Home: Once paired with the Smart Life app, enable the "Smart Life" skill/service in your Alexa or Google Home app and link your accounts. The thermostat should then appear as a controllable device.
- For Apple HomeKit: The thermostat directly integrates with Apple HomeKit.
- Scan the HomeKit setup code (usually found on the device or packaging) using the Apple Home app.
- Note: HomeKit requires a HomePod, HomePod mini, or Apple TV to act as a home hub for successful scanning and adding of Matter accessories.
Figure 6: Direct Connect via App Scan
Figure 7: Apple HomeKit Hub Requirements
6. Operation
6.1 Thermostat Display and Controls
The thermostat features a clear digital display and intuitive controls:
Figure 8: Thermostat Display and Button Functions
- Display Indicators: Weather, Room Temperature, Set Temperature, Underfloor Temperature (if applicable), Period, Heating On/Programmable/Manual Mode, Lock, Energy Saving, Wi-Fi (blinks when connected), Time, Weekday.
- Buttons:
- Mode: Cycle through operating modes (e.g., manual, programmable).
- Power On/Off: Turn the thermostat on or off.
- Clock: Adjust time and schedule settings.
- Rotating Dial: Used for adjusting temperature settings and navigating menus.
6.2 Control Methods
You can control your thermostat using multiple methods:
- Manual Control: Directly adjust temperature using the rotating dial and touch buttons on the thermostat.
- Smartphone App: Use the Tuya Smart Life app to remotely control temperature, set schedules, and manage settings from anywhere.
- Voice Control: Integrate with Amazon Alexa, Google Home, or Apple HomeKit for convenient voice commands.
Figure 9: Multiple Temperature Control Methods
Figure 10: Key Features Overview
6.3 Advanced Features
- Power-Off Memory: Settings are saved even during power outages, ensuring your preferences are retained.
- Group Control: Manage multiple thermostats simultaneously through the app for zoned heating.
- Family Group Sharing: Share control of the thermostat with family members via the app.
7. Maintenance
The WENZHI BHT-009 Matter thermostat requires minimal maintenance.
- Cleaning: Wipe the display and casing with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the surface.
- Software Updates: Ensure your Smart Life app is up-to-date to receive the latest features and security enhancements for your thermostat.
- Environmental Conditions: Keep the thermostat within the specified ambient temperature (0~45°C) and humidity (5~95% RH non-condensing) ranges for optimal performance.
8. Troubleshooting
If you encounter issues with your thermostat, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat not powering on | No power supply; incorrect wiring. | Check the main power supply to the thermostat. Verify wiring connections according to the installation diagrams. |
| Wi-Fi not connecting or blinking | Incorrect Wi-Fi password; 5GHz network; too far from router. | Ensure you are using a 2.4GHz Wi-Fi network. Re-enter the Wi-Fi password in the app. Move the thermostat closer to the router or consider a Wi-Fi extender. |
| Temperature reading inaccurate | Sensor issue; thermostat placed near heat source/draft. | Ensure the thermostat is not exposed to direct sunlight, drafts, or other heat sources. If using a floor sensor, check its connection. |
| Cannot control via voice assistant (Alexa/Google Home/HomeKit) | App not linked; Matter hub not set up (for HomeKit). | Verify that the Smart Life app is correctly linked to your voice assistant account. For HomeKit, ensure you have a HomePod, HomePod mini, or Apple TV set up as a home hub. |
9. User Tips
- Model Selection for Heating Systems: When purchasing, ensure you select the correct model for your heating system:
- GA model: For Water Heating systems.
- GB model: For Electric Floor Heating systems.
- GC model: For Gas Boiler systems.
- Optimal Placement: Install the thermostat on an interior wall, away from direct sunlight, windows, or heat-emitting appliances, to ensure accurate temperature readings.
- Leverage Smart Features: Utilize the scheduling features in the Smart Life app to automate your heating and save energy. Explore group control for managing multiple thermostats efficiently.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact details provided by your retailer or visit the official WENZHI website. Keep your purchase receipt as proof of purchase.
