Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your Avatto WT200-16A-W Smart Thermostat. Please read this manual carefully before installation and use to ensure proper function and safety.
Product Overview and Features
The Avatto WT200-16A-W is a smart thermostat designed for electric heating systems. It offers precise temperature control and smart connectivity features for enhanced comfort and energy efficiency.
- Precise Temperature Control: Equipped with an NTC sensor, ensuring temperature accuracy up to 1°C.
- Wi-Fi Connectivity: Seamless integration with your home network.
- Smart Home Compatibility: Works with popular platforms like Tuya, Smart Life, Amazon Alexa, Google Assistant, and Yandex Alice.
- Programmable Schedules: Supports 5+2, 6+1, or 7-day programming with 6 time modes per day.
- Multiple Control Methods: Control via smartphone app (Tuya/Smart Life), voice commands, or the integrated touch screen.
- LCD Display: Provides clear information on operating mode, network connection, set temperature, and time. Adjustable brightness.
- Child Lock: Prevents unintended operation.
- Frost Protection: Helps prevent pipes from freezing in cold conditions.

Figure 1: Front view of the Avatto WT200-16A-W Smart Thermostat, showing the LCD display and touch buttons.
Setup and Installation
1. Safety Precautions
- Always turn off power at the circuit breaker before beginning any electrical work.
- Installation should be performed by a qualified electrician in accordance with local electrical codes.
- Ensure the thermostat's voltage and current ratings match your heating system's requirements.
2. Wiring Diagram
Refer to the wiring diagram on the back of the thermostat and the image below for correct connections. The thermostat is designed for electric heating systems.

Figure 2: Back view of the Avatto WT200-16A-W Smart Thermostat, illustrating the wiring terminals (L, N, L1, N1) and sensor connections (5, 6, 7).
- L & N: Power input (AC100V-240V).
- L1 & N1: Output to the electric heating load.
- 5, 6, 7: External NTC sensor connections (if applicable).
3. Mounting
Mount the thermostat in a standard wall box at an appropriate height, away from direct sunlight, drafts, or heat sources that could affect temperature readings.
4. Initial Power On and Wi-Fi Connection
- After wiring and mounting, restore power at the circuit breaker.
- The thermostat display will light up.
- Download the Tuya Smart or Smart Life app from your smartphone's app store.
- Register or log in to your account.
- Follow the in-app instructions to add the thermostat. This typically involves putting the thermostat into pairing mode (refer to the thermostat's on-screen prompts or a quick start guide for specific button presses).
- Ensure your Wi-Fi network is 2.4GHz, as 5GHz networks are generally not supported by smart home devices.
Operating Instructions
1. Touch Screen Controls
The thermostat features a responsive touch screen for direct control. Common icons and their functions include:
- Power Button: Turns the thermostat on/off.
- Up/Down Arrows: Adjusts the set temperature.
- Mode Button: Switches between manual, automatic (programmed), and other available modes.
- Clock Icon: Accesses time and schedule settings.
- Wi-Fi Icon: Indicates network connection status.
- Lock Icon: Indicates if the child lock is active.
2. Programming Schedules
The thermostat supports flexible programming to optimize heating based on your daily routine. You can set schedules for 5+2 days (weekdays + weekend), 6+1 days (Mon-Sat + Sunday), or 7 days (each day individually).
- Access the programming menu via the app or directly on the thermostat.
- Select your preferred programming mode (5+2, 6+1, or 7 days).
- For each day (or group of days), set up to 6 time periods with corresponding desired temperatures.
- Save your settings. The thermostat will automatically follow this schedule in "Auto" mode.
3. Manual and Automatic Modes
- Manual Mode: The thermostat maintains a constant temperature set by the user until manually changed.
- Automatic Mode: The thermostat follows the pre-programmed schedule.
- Switch between modes using the mode button on the thermostat or through the app.
4. Voice Control
Once connected to Tuya/Smart Life, you can link your thermostat to voice assistants like Amazon Alexa, Google Home, or Yandex Alice.
- Enable the "Tuya Smart" or "Smart Life" skill/service in your voice assistant app.
- Discover devices.
- You can then use commands such as:
- "Alexa, set [Thermostat Name] to 22 degrees."
- "Hey Google, what's the temperature in [Thermostat Name]?"
- "Yandex, turn on [Thermostat Name]."
5. Child Lock Function
To prevent accidental changes to settings, activate the child lock. This can typically be done by pressing and holding a specific combination of buttons on the thermostat (refer to the on-screen prompts) or through the app. A lock icon will appear on the display when active.
Maintenance
- Cleaning: Wipe the thermostat's screen and casing with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Software Updates: Keep your Tuya Smart/Smart Life app updated to ensure the best performance and access to new features. Firmware updates for the thermostat may also be available through the app.
- Sensor Care: Ensure the thermostat's temperature sensor (usually a small opening on the casing) is not obstructed by dust or debris.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat not powering on. | No power supply; incorrect wiring. | Check circuit breaker. Verify wiring according to the diagram. |
| Cannot connect to Wi-Fi. | Incorrect Wi-Fi password; 5GHz network; thermostat too far from router. | Ensure correct 2.4GHz Wi-Fi password. Move thermostat closer to router. Restart router and thermostat. |
| Temperature reading seems inaccurate. | Thermostat exposed to direct sunlight, drafts, or heat sources. | Relocate thermostat if possible. Ensure sensor is not obstructed. |
| Heating system not responding. | Incorrect wiring; heating system fault; thermostat in wrong mode. | Verify wiring. Check heating system's power. Ensure thermostat is in heating mode or auto mode with a set temperature above ambient. |
| Child lock is active, cannot change settings. | Child lock enabled. | Deactivate child lock via the app or by pressing the specific button combination on the thermostat (refer to device instructions). |
Specifications
| Feature | Detail |
|---|---|
| Model Number | WT200-16A-W |
| Brand | AVATTO |
| Color | Black |
| Dimensions (L x W x H) | 10 x 5 x 1.27 cm |
| Weight | 270 grams |
| Voltage | 230 Volts |
| Power | 3.68E+3 (interpreted as 3680W for 16A at 230V) |
| Connectivity Technology | Wi-Fi |
| Special Feature | Frost Protection |
| Controller Type | Google Assistant, Amazon Alexa, Button Control |
| Temperature Control Type | Digital |
| Power Source | Corded Electric |





