1. Introduction
Thank you for choosing the AVATTO Smart Knob Thermostat. This device is designed to provide intelligent temperature control for your home, compatible with various heating systems including water heating, gas boilers, and electric floor heating. With its intuitive knob design, ambient light features, and smart connectivity via Tuya/Smart Life app, Alexa, and Google Home, managing your home's climate has never been easier.
Figure 1: AVATTO Smart Knob Thermostat Overview
2. Product Overview
The AVATTO Smart Knob Thermostat features a classic knob design with a modern display and ambient lighting for an enhanced visual experience. It offers various functions accessible through the knob and display.
Figure 2: Smart Knob Thermostat Functions
Key Features:
- Knob Control: Smooth and intuitive control for settings.
- Ambient Light: Creates a visual experience and indicates status.
- Multiple Heating Types: Supports Water Heating, Electric Floor Heating, and Gas Boilers.
- Temperature Calibration: Adjust temperature readings for accuracy.
- Smart Connectivity: Works with Tuya/Smart Life app, Amazon Alexa, and Google Home.
Figure 3: Compatible Heating Systems
3. Specifications
Refer to the table below for detailed product specifications:
| Parameter | Value |
|---|---|
| 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 |
| Wattage | 16A/3A |
| Certification | CE |
Figure 4: Product Dimensions and Parameters
4. Installation
4.1 Safety Information
WARNING: Electrical installation should only be performed by a qualified electrician. Ensure power is turned OFF at the main circuit breaker before beginning any installation work to prevent electric shock.
4.2 Tools Required
- Screwdriver (Phillips and Flathead)
- Wire Strippers
- Voltage Tester
4.3 Mounting
The thermostat is suitable for installation within a standard 86mm pattress box or European 60mm pattress box.
- Step 1: Keep power off. Ensure the main power supply to the circuit is disconnected (Figure 5, left).
- Step 2: Separate display and bottom. Gently separate the front display unit from the back mounting plate (Figure 5, right).
Figure 5: Installation Steps 1 & 2
- Step 3: Connect power supply, load into the appropriate terminals. Wire the thermostat according to the specific wiring diagram for your heating system (Figure 6, left).
- Step 4: Fix the mounting plate into the wall with screws in the box. Secure the back mounting plate to the wall box using screws (Figure 6, right).
Figure 6: Installation Steps 3 & 4
- Step 5: Put the front cover and back cover together. Carefully align and snap the front display unit onto the mounted back plate (Figure 7, left).
- Step 6: Installation complete. The thermostat is now fully assembled and ready for power (Figure 7, right).
Figure 7: Installation Steps 5 & 6
4.4 Wiring Diagram
Ensure correct wiring based on your heating system type. Incorrect wiring can damage the thermostat or heating system.
Figure 8: Detailed Wiring Diagram for All Models
Product Type Wiring:
- BH (Gas Boiler Heating): Connects to the boiler's dry contact terminals.
- WH (Water Heating): Connects to the water heating system.
- EH (Electric Floor Heating): Connects to the electric floor heating system. This model typically requires a neutral wire.
Figure 9: Example Wiring for Water/Gas Boiler (3A)
5. Operation
5.1 Icon Description
The main display shows various icons indicating the thermostat's status and current environment.
Figure 10: Main Display Icon Description
5.2 Basic Operation
- Power On: When powered on, the thermostat displays the home interface.
- Accessing Functions: If the screen is on the home interface and there's no operation, press the knob button to wake up the device, then press it again to enter the function interface.
- Selecting Functions: In the function interface, rotate the knob to select the desired function. Press the knob to enter the option, rotate to select the specific setting, and press the knob to confirm.
- Returning to Home: Long press the knob in the function interface until the blue aperture forms a circle, or after determining a function, it will automatically return to the main interface after 10 seconds.
- Distribution Mode: When the screen is on the home screen, press and hold the knob button for more than 5 seconds. Release it, and the Wi-Fi icon will blink, indicating the thermostat has entered distribution (pairing) mode.
5.3 Advanced Settings
Access these settings from the function interface to customize your thermostat's behavior.
- Power:
ON: Thermostat controls the device according to settings.
OFF: Thermostat stops controlling the device. - Set Temperature: Adjust the desired temperature. Range: 5 to 45°C.
- Language Selection: Available languages include English and German.
- Sensor Types:
In: Internal Sensor (controls temperature).
Ou: External Sensor (controls temperature).
ALL: Internal/External Sensor (internal sensor controls temp, external sensor limits temp). - Temperature Scale: Switch between Fahrenheit (°F) and Celsius (°C).
- Programming Mode / Manual Mode:
Programming Mode: Performs temperature control according to the default schedule.
Manual Mode: Temperature can be set directly on the thermostat. - Temperature Calibration: Calibrate the temperature of the compensated sensor. Compensation range: -9°C to +9°C (default 0°C). Adjust after the thermostat has worked for 30 minutes.
- Brightness: Adjust standby screen brightness from 0% to 100%. If set to 0%, the screen light turns off; press the knob to light it up.
Figure 11: Temperature Calibration
6. Programming the Thermostat
You can set a weekly program for your thermostat, typically configured via the AVATTO or Smart Life 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 |
7. Connecting to the App
The AVATTO Smart Knob Thermostat can be controlled remotely using the AVATTO app or the Smart Life app.
- Download the App: Scan the QR code below to install either the "AVATTO" or "Smart Life" APP. The AVATTO APP is recommended for more customization functions.
【AVATTO】 App
【Smart Life】 App
- Pairing Process:
a. When the thermostat displays the home screen, press and hold the knob button for more than 5 seconds, then release it. The Wi-Fi icon will blink, indicating it's in pairing mode.
b. Open the AVATTO App (or Smart Life App) on your phone.
c. Turn on Bluetooth on your phone.
d. The app should automatically recognize the thermostat. Follow the in-app instructions to add the device and connect it to your Wi-Fi network.
8. User Tips
- Neutral Wire for Electric Heating: If you have the electric underfloor heating model (EH), ensure a neutral wire is available for proper installation.
- Compatibility: This thermostat fits into standard UK and Dutch electrical installations, making it a suitable replacement for older units.
- Ease of Use: Users find the thermostat very easy to install and configure, both physically and through the app. The operation is intuitive.
- Audible Relay: A mechanical switching relay is used, which may produce an audible click when switching on/off. This is normal operation.
- Display Readability: The display is generally well-regarded for its readability.
9. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Thermostat not powering on | Check main power supply and wiring connections. Ensure power is restored after installation. |
| Wi-Fi icon not blinking / Cannot enter pairing mode | Ensure the thermostat is powered on. Press and hold the knob button for more than 5 seconds until the Wi-Fi icon blinks. |
| Cannot connect to app | Ensure your phone's Bluetooth is on. Check that the thermostat is in pairing mode (blinking Wi-Fi icon). Make sure your Wi-Fi network is 2.4GHz. Restart your router and try again. |
| Temperature reading seems inaccurate | Use the Temperature Calibration feature in Advanced Settings to adjust the reading. Ensure the thermostat is not exposed to direct sunlight or drafts. |
| Heating system not responding | Check thermostat settings (Power ON, desired temperature set). Verify wiring connections to the heating system. Ensure the heating system itself is operational. |
| Does it work at 220V? | Yes, the thermostat operates on 95-240VAC. |
| Is it for heating and cooling? | This model is primarily designed for heating systems. |
| Can the temperature range be set up to 110°C? | No, the set temperature range is 5-45°C, and the room temperature range is 5-99°C. |
10. Maintenance
To ensure optimal performance and longevity of your thermostat:
- Clean the display and body with a soft, dry cloth.
- Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the device.
- Keep the thermostat free from dust and debris.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your original retailer or visit the official AVATTO website. Please have your model number (WT20R/ZWT20R) and purchase details ready.
For the complete and most up-to-date user manual, please refer to the official PDF document: AVATTO Smart Knob Thermostat User Manual (PDF).