1. Introduction
1.1 Product Overview
The AVATTO Smart WiFi Electric Underfloor Heating Thermostat (Model WT400S-16A-W) is designed to control electric underfloor heating systems, including heating cables, heating films, or heating mats. This device provides efficient room heating and offers advanced control features for user convenience.
1.2 Key Features
- Electric Underfloor Heating Control: Manages heating elements with specifications of 3600 W, 16 A, 230 V.
- Remote Control via App: Supports remote operation through the Smart Life application.
- Voice Control: Compatible with Amazon Alexa and Google Home for voice commands.
- Programmable Schedule: Allows setting up to 6 different temperature intervals per day from Monday to Friday, and 2 intervals for weekends, to optimize energy usage.
- Dual Temperature Sensing: Features an integrated NTC room temperature sensor and an additional 3-meter floor temperature sensor to prevent overheating and ensure accurate readings.
- Temperature Calibration: Provides a function to adjust the displayed temperature to match the actual room temperature.
- Adjustable Screen Brightness: Screen brightness can be adjusted or turned off completely to avoid disturbance.
- Child Lock Function: Prevents unintended operation by children.
- Antifreeze Function: Automatically maintains the room temperature between 5°C and 7°C to prevent freezing of heating devices.
Image 1.1: The AVATTO Smart WiFi Electric Underfloor Heating Thermostat shown with compatible underfloor heating elements like heating cables, films, and mats.
2. Safety Information
Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or damage to the product.
- Electrical Installation: Installation must be performed by a qualified electrician in accordance with local electrical codes and regulations.
- Power Disconnection: Always disconnect power at the circuit breaker before installing, cleaning, or servicing the thermostat.
- Voltage Compatibility: Ensure the thermostat's voltage rating (230V) matches your electrical supply.
- Wiring: Use appropriate wire gauges and ensure all connections are secure to prevent loose wiring and potential hazards.
- Moisture: Do not install the thermostat in areas where it may be exposed to water or excessive moisture.
- Overheating: Do not cover the thermostat or obstruct its ventilation openings.
3. Setup
3.1 What's in the Box
Upon unpacking, verify that the following items are included:
- 1 x AVATTO Smart WiFi Thermostat
- 1 x User Manual (Instructions in German are included with the product)
- 1 x 3-meter Floor Temperature Sensor
3.2 Installation Guidelines
The thermostat is designed for wall mounting. Ensure the installation location is free from direct sunlight, drafts, or other heat sources that could affect temperature readings. For detailed wiring diagrams and specific installation steps, please refer to the German instructions included with your product and consult a qualified electrician.
3.3 App Pairing and Initial Configuration
To enable remote control and smart features, connect your thermostat to the Smart Life or Tuya app.
- Download the Smart Life or Tuya app from your smartphone's app store.
- Register or log in to your account.
- Ensure your thermostat is powered on and in pairing mode (refer to the device's display for pairing indicators, typically a flashing Wi-Fi icon).
- In the app, tap '+' to add a new device, then select 'Thermostat' or 'Heater'.
- Follow the on-screen instructions to connect the thermostat to your 2.4 GHz Wi-Fi network.
- Once connected, you can control the thermostat remotely and integrate it with voice assistants.
Image 3.1: Remote control of the thermostat using the Smart Life or Tuya app on a smartphone.
Image 3.2: The thermostat supports voice control through Amazon Alexa and Google Home devices.
4. Operating Instructions
4.1 Basic Operation
The thermostat's display shows the current room temperature and time. Use the '+' and '-' buttons on the device or the app to adjust the target temperature. The heating indicator (flame icon) illuminates when the heating system is active.
4.2 Programmable Mode
The programmable mode allows you to set specific temperature schedules for different times of the day and week.
- Weekday Schedule: Configure up to 6 distinct temperature periods for Monday to Friday.
- Weekend Schedule: Set 2 different temperature periods for Saturday and Sunday.
Access the scheduling settings through the Smart Life app or the thermostat's menu (refer to the device's specific menu navigation for details).
Image 4.1: Setting daily and weekly temperature schedules via the app interface.
4.3 Temperature Calibration
If there is a discrepancy between the thermostat's displayed temperature and an external thermometer's reading, you can calibrate the thermostat. This function is typically found in the device settings menu or the Smart Life app. Adjust the calibration value until the displayed temperature matches the actual room temperature.
4.4 Screen Brightness Adjustment
The display brightness can be adjusted to suit your preference or turned off completely, which is useful for bedrooms during nighttime.
Image 4.2: Options for adjusting the thermostat's screen brightness from 0% to 100%.
4.5 Child Lock Function
Activate the child lock feature to prevent unauthorized changes to the thermostat settings. This function locks the physical buttons on the device. Deactivate it through the app or by following specific button combinations on the thermostat (refer to the product's detailed instructions).
4.6 Antifreeze Function
When enabled, the antifreeze function automatically activates heating to maintain a minimum room temperature between 5°C and 7°C. This prevents pipes and heating elements from freezing in unoccupied spaces.
4.7 Floor Temperature Limit
The external 3-meter floor sensor measures the floor temperature in real-time. This feature prevents the floor from overheating by automatically shutting off the heating when a set temperature limit is exceeded. You can typically set upper and lower limits for the floor temperature within the app or device settings.
Image 4.3: Display indicating precise temperature control settings, including minimum temperature, hysteresis, and upper/lower limits.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your thermostat.
- Cleaning: Wipe the thermostat's screen and casing with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the surface.
- Sensor Care: Ensure the external floor temperature sensor is not damaged or obstructed. Avoid placing heavy objects on the sensor cable.
- Software Updates: Periodically check the Smart Life app for any available firmware updates for your thermostat to ensure you have the latest features and bug fixes.
6. Troubleshooting
If you encounter issues with your AVATTO thermostat, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat not powering on | No power supply; incorrect wiring; circuit breaker tripped. | Check power supply; verify wiring connections (consult electrician); reset circuit breaker. |
| Wi-Fi disconnection / Offline in app | Weak Wi-Fi signal; router issues; incorrect Wi-Fi password; 5GHz network. | Ensure thermostat is within Wi-Fi range; restart router; re-enter Wi-Fi password in app; ensure 2.4 GHz Wi-Fi is used. If DSL outage, the device may remain offline until manually reconnected. |
| Inaccurate temperature reading | Sensor obstruction; calibration needed; faulty sensor. | Ensure sensors are clear; use the temperature calibration function; if issue persists, contact support. |
| Heating not turning on/off | Incorrect settings; faulty wiring; thermostat malfunction. | Check programmed schedule and target temperature; verify wiring; if necessary, contact support. |
| Cannot find floor temperature settings | Feature not enabled; incorrect app navigation. | Ensure the external floor sensor is correctly installed. Navigate through the Smart Life app settings for the thermostat to locate floor temperature limit controls. |
If the problem persists after attempting these solutions, please contact customer support.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | WT400S-16A-W |
| Power Supply | 230 V AC |
| Current Rating | 16 A |
| Max Wattage | 3600 W |
| Connectivity | 2.4 GHz WiFi |
| Material | Plastic |
| Color | White |
| Display Type | LCD |
| Mounting Type | Wall Mount |
| Special Features | Amazon Alexa, Google Assistant, Temperature Calibration, Programmable, Smart Life App |
| Included Components | 1 Thermostat, Instructions (German) |
| Item Weight | 260 g |
| Package Dimensions | 10.6 x 9.7 x 6.7 cm |
8. Warranty and Support
This device comes with a two-year warranty. During the warranty period, the device will be replaced free of charge once if a defect occurs.
For any issues during installation or operation, please contact us through the Amazon platform. We offer technical support to assist you.
