1. Introduction
The AVATTO Smart Knob Thermostat (Model WT20R/ZWT20R) is an intelligent temperature control device designed for various heating systems, including electric floor heating, water heating, and gas boilers. It features a user-friendly knob design with an ambient light display, a high-end color screen, and supports remote control via the Smart Life/Tuya App, as well as voice control through platforms like Amazon Alexa, Google Home, and Yandex Alice. This manual provides detailed instructions for installation, operation, and advanced settings to ensure optimal performance and comfort.
Video: AVATTO Smart Knob Thermostat Product Overview and Feature Demonstration
2. Specifications
The following table outlines the technical specifications for the AVATTO Smart Knob Thermostat:
| Feature | Specification |
|---|---|
| Model Number | WT20R/ZWT20R |
| Protection Class | IP20 |
| Current Load | 3A (water heating, gas boiler), Max 16A (electric heating) |
| Sensor | NTC3950, 10K |
| Accuracy | ±1°C |
| Set Temperature Range | 5-45°C |
| Room Temperature Range | 5-99°C |
| Power Consumption | <1.5W |
| Ambient Humidity | 5 ~ 95% RH (Non Condensing) |
| Power Supply | 95~240VAC, 50~60Hz |
Image: Detailed product dimensions and technical parameters.
3. Installation
The thermostat is designed for installation within a standard 80mm pattress box or a European 60mm pattress box. Professional installation is recommended.
3.1. Wiring Diagrams
Ensure power is OFF before proceeding with any wiring. Refer to the appropriate diagram for your heating system type.
Image: Wiring diagram for WT20R-BH-3A-W-WiFi (Gas Boiler) and WT20R-WH-3A-W-WiFi (Water Heating with NC/NO Actuator).
Image: Wiring diagram for WT20R-EH-16A-W-WiFi (Electric Floor Heating 16A).
3.2. Installation Steps
- Keep power off: Ensure the main power supply to the heating system is completely disconnected before starting installation.
- Separate display and bottom: Carefully separate the front display unit from the back mounting plate of the thermostat.
- Connect wiring: Connect the power supply and load wires to the appropriate terminals on the back mounting plate as shown in the wiring diagrams.
- Fix mounting plate: Securely fix the mounting plate into the wall pattress box using screws.
- Assemble thermostat: Align the front display cover with the back mounting plate and gently push them together until they click into place.
- Installation complete: Once assembled, the installation is complete. You may now restore power to the system.
4. Operation
The AVATTO Smart Knob Thermostat features intuitive controls via its rotatable knob and a clear display. The display provides information such as weather, temperature, time, outdoor humidity, WiFi status, current heating status, programming cycle, and mode.
Image: Icon description on the thermostat display.
4.1. Basic Controls
- Short Press: Enter/confirm settings.
- Long Press: Enter distribution mode or exit function interface.
- Rotate: Select/adjust function values.
4.2. General Operation
- Power On: When powered on, the thermostat displays the home interface.
- Accessing Functions: If the screen is on the home interface and there is no operation, press the knob button to wake up the device. Then, press it again to enter the function interface. Rotate the knob to select the desired function, press the knob to enter the option, rotate to adjust, and press again to confirm.
- Exiting Functions: In the function interface, a long press of the knob (until a blue aperture forms a circle) will return the thermostat to the home interface. Alternatively, after confirming a function, it will automatically return to the main interface after 10 seconds of inactivity.
- Entering Distribution Mode: From the home screen, press and hold the knob button for more than 5 seconds. Release the button, and the WiFi icon will blink, indicating the thermostat has entered distribution mode for app connection.
Image: Smart Knob Thermostat with labeled functions for power, set temperature, language, sensor type, temperature scale, program/manual mode, brightness, and temperature calibration.
Image: Smooth knob control with ambient light for visual feedback.
5. Advanced Settings
The thermostat offers several advanced settings to customize its operation:
- Power (ON/OFF): Controls whether the thermostat is actively controlling the heating device or is off.
- Set Temperature: Allows you to set the desired temperature within a range of 5°C to 45°C.
- Language Selection: Choose between English and German for the display language.
- Sensor Types:
- In (Internal Sensor): Uses the built-in sensor to control the room temperature.
- Ou (External Sensor): Uses an external sensor (if connected) to control the temperature.
- ALL (Internal/External Sensor): Uses the internal sensor for primary temperature control and the external sensor to limit the floor temperature, preventing overheating.
Image: Sensor selection options for internal, external, or both sensors. Note: External sensors are typically supplied with electric heating systems; for water heating and gas boilers, contact customer service for options.
- Temperature Scale: Switch between Celsius (°C) and Fahrenheit (°F) for temperature display.
- Programming Mode / Manual Mode:
- Programming Mode: Follows a predefined temperature schedule (e.g., 5+2/6+1/7 days a week, 6 time-modes daily).
- Manual Mode: Allows direct temperature setting on the thermostat.
Image: App interface for selecting Auto (Program) or Manual mode.
- Temperature Calibration: Adjust the temperature reading of the compensated sensor. The calibration range is -9°C to 9°C, with a default of 0°C. Allow the thermostat to operate for 30 minutes after adjustment for accurate results.
- Brightness: Adjust the standby screen brightness from 0% to 100%. At 0%, the screen light is off. Pressing the knob will temporarily light up the screen.
Image: Temperature calibration adjustment.
5.1. Weekly Program Schedule (via App)
The thermostat supports a weekly programmable schedule, allowing you to set different temperature ranges for up to 6 periods each day. This schedule is configured through the Smart Life/Tuya App.
| Period | Weekday (Mon-Fri) | Weekend (Sat) | Weekend (Sun) | |||
|---|---|---|---|---|---|---|
| Time | Temp. | Time | Temp. | Time | Temp. | |
| Period 1 | 06:00 | 20°C | 06:00 | 20°C | 06:00 | 20°C |
| Period 2 | 08:00 | 15°C | 08:00 | 20°C | 08:00 | 20°C |
| Period 3 | 11:30 | 15°C | 11:30 | 20°C | 11:30 | 20°C |
| Period 4 | 13:30 | 15°C | 13:30 | 20°C | 13:30 | 20°C |
| Period 5 | 17:00 | 22°C | 17:00 | 20°C | 17:00 | 20°C |
| Period 6 | 22:00 | 15°C | 22:00 | 15°C | 22:00 | 15°C |
6. App Connection (Smart Life/Tuya)
To unlock the full smart features of your thermostat, connect it to the Smart Life or Tuya App.
6.1. Install the App
Scan the QR code below or search for "Smart Life" or "Tuya Smart" in your mobile app store (Google Play Store for Android, Apple App Store for iOS) to download and install the application.
Image: QR code for Smart Life App (not embeddable, please refer to product packaging or official website for the QR code).
Text: [Smart Life] App
6.2. Connect the Thermostat to the App
- Ensure your thermostat is powered on and displaying the home screen.
- Enter distribution mode on the thermostat: Press and hold the knob button for more than 5 seconds. Release the button, and the WiFi icon on the thermostat display will begin to blink.
- On your smartphone, enable Bluetooth.
- Open the Smart Life/Tuya App. The app should automatically recognize the thermostat in distribution mode.
- Follow the in-app instructions to add the device and configure its network settings (WiFi connection).
Image: Family sharing function, allowing multiple users to control the thermostat.
Image: Group control function, enabling management of multiple thermostats in different rooms.
7. User Tips
- Heating System Compatibility: This thermostat is compatible with electric floor heating, water heating, and gas boiler systems. It is designed for heating functions only and does not support cooling.
- External Sensor: While the thermostat has an internal sensor, an external temperature sensor can be used for more precise floor temperature control or to limit the maximum floor temperature. It is not mandatory for basic operation.
- Temperature Range: The set temperature range is 5-45°C. This device is not suitable for applications requiring higher temperatures, such as sauna heater control (e.g., 110°C).
- Hysteresis: The thermostat includes a hysteresis function in its menu, allowing for fine-tuning of temperature control to prevent rapid on/off cycling of your heating system.
- Temperature Display: The thermostat can display both interior and exterior temperatures if an external sensor is connected and configured.
8. Troubleshooting
- Thermostat not powering on: Check the power supply connection and ensure the circuit breaker is not tripped. Verify wiring connections are secure.
- WiFi not connecting: Ensure the thermostat is in distribution mode (blinking WiFi icon). Confirm Bluetooth is enabled on your phone and that the Smart Life/Tuya App is open and attempting to add the device. Check your WiFi network credentials.
- Temperature not changing/heating: Verify the set temperature is higher than the current room temperature. Check if the thermostat is in Manual Mode or if the Program Mode schedule is active. Ensure the correct sensor type (Internal, External, ALL) is selected.
- Incorrect temperature reading: Consider performing a temperature calibration if you suspect the reading is inaccurate. Ensure the sensor is properly installed and not obstructed.
- Thermostat unresponsive: Try a soft reset by turning off the power to the thermostat for a few minutes and then restoring it.
9. Maintenance
- Cleaning: Wipe the thermostat's screen and body with a soft, dry, or slightly damp cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the device.
- Software Updates: Regularly check the Smart Life/Tuya App for any available firmware updates for your thermostat. Keeping the device updated ensures optimal performance, security, and access to new features.
- Environmental Conditions: Ensure the thermostat is not exposed to direct sunlight, drafts, or extreme temperatures, which can affect its accuracy and lifespan.
10. Warranty and Support
For any warranty claims, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase. Refer to the official AVATTO website or your product documentation for specific warranty terms and contact information.
