AVATTO WT81 WiFi Smart Thermostat User Manual

1. Introduction

The AVATTO WT81 is a smart WiFi thermostat designed for precise temperature control of various heating systems, including electric floor heating, water heating, and gas boilers. This manual provides comprehensive instructions for installation, setup, and daily operation, ensuring optimal comfort and energy efficiency in your home or office.

2. Key Features

• Voice Control: Compatible with Yandex Alice, Amazon Alexa, and Google Home for convenient hands-free operation.
• LCD Touch Display: Features an elegant, anti-scratch design with a large, backlit LCD touch screen for clear and intuitive reading and operation.
• APP Control: Remotely manage your thermostat settings from anywhere using the Tuya or Smart Life mobile application.
• Manual/Auto Mode: Easily switch between manual temperature control and automated programming based on your preferences.
• Accurate Temperature: Equipped with internal and external floor sensors (where applicable) for precise ambient and floor temperature detection, with 1°C accuracy.
• Weekly Programmable: Supports flexible scheduling with 6 time-modes daily, allowing for customized temperature settings throughout the week (5+2, 6+1, or 7-day programming).
• Memory Function: Retains all settings and data even after a power outage.
• Children Lock: A keypad locking function prevents unintended adjustments by children.
• Versatile Application: Suitable for electric heating (16A), water heating (3A), and water/gas boiler systems (3A).

3. Specifications

4. Package Contents

Upon opening the package, please verify that all items are present and in good condition:

• AVATTO WT81 WiFi Smart Thermostat Unit
• External Temperature Sensor (included only with 16A Electric Floor Heating models)
• Mounting Screws
• User Manual (this document)

5. Installation

WARNING: Installation should be performed by a qualified electrician. Disconnect all power to the heating system at the main circuit breaker before beginning installation to prevent electrical shock.

5.1 Wiring Diagrams

The wiring configuration depends on your specific heating system type. Refer to the appropriate diagram below for correct connection.

5.1.1 Electric Floor Heating (16A)

Connect the Live (L) and Neutral (N) wires from your power supply to terminals 1 and 2 respectively. Connect the heating load to terminals 3 and 4. If an external sensor is included, connect it to terminals 5 and 6. Ensure the sensor type is NTC B=3950 R25°C=10K.

5.1.2 Water/Gas Boiler (3A)

Connect the Live (L) and Neutral (N) wires from your power supply to terminals 1 and 2 respectively. The boiler connection uses a dry contact relay. Connect the boiler's control wires to terminals 3 (NO - Normally Open) and 4 (COM - Common). This model typically does not include an external sensor.

5.1.3 Water Heating (3A)

Connect the Live (L) and Neutral (N) wires from your power supply to terminals 1 and 2 respectively. The water heating system uses a dry contact relay. Connect the water heating control wires to terminals 3 and 4. There are two types: NC (Normally Closed) and NO (Normally Open). Ensure you connect according to your system's requirements. This model typically does not include an external sensor.

5.2 Physical Installation

The thermostat is designed for standard wall-mounted installation. Its dimensions are 86mm x 86mm, with a visible depth of 15mm and a mounting depth of 25mm. Ensure you have a suitable electrical box for installation.

6. Initial Setup

6.1 Power On/Off

To turn off the thermostat, press and hold the power button (usually the middle button with a circle and vertical line) until the display turns off. To turn it on, press the power button briefly.

6.2 Entering Connection Mode

To connect the thermostat to your WiFi network, you need to put it into connection mode. With the thermostat turned off, press and hold the 'Up' (triangle pointing up) and 'Down' (triangle pointing down) buttons simultaneously for 5 seconds. The WiFi icon on the display will start to flash rapidly, indicating it's ready for pairing.

6.3 App Pairing (Tuya/Smart Life)

1. Download the Tuya Smart or Smart Life app from your smartphone's app store.
2. Register or log in to your account.
3. Ensure your thermostat is in connection mode (WiFi icon flashing rapidly).
4. In the app, tap '+' to add a device.
5. Select 'Small Home Appliance' -> 'Thermostat' or use the 'Auto Scan' feature.
6. Follow the on-screen instructions to connect the thermostat to your 2.4GHz WiFi network.

6.4 Voice Assistant Integration

Once paired with the Tuya/Smart Life app, you can link your thermostat to voice assistants like Amazon Alexa, Google Home, or Yandex Alice. Follow the instructions within your chosen voice assistant's app to enable the Tuya Smart or Smart Life skill/action and discover your new thermostat.

7. Operation

7.1 Display Symbols and Touch Keys

The thermostat features a clear LCD display with various symbols and touch-sensitive buttons for easy interaction.

Display Symbols:

• Hand icon: Manual mode
• Clock icon: Period control mode
• Flame icon: Heating active
• Sun icon: Getting up, first period
• House with arrow out: Out in the morning, second period
• House with arrow in: Going home at noon, third period
• House with arrow out (afternoon): Out in the afternoon, fourth period
• House with arrow in (evening): Going home in the evening, fifth period
• Moon icon: Sleeping at night, sixth period

Touch Keys:

• 'M' (Mode Key): Adjusts operating mode (Manual/Auto).
• Clock icon: Adjusts time and week.
• Power icon: Turns the thermostat ON/OFF.
• Up arrow: Increases temperature setting or navigates menus.
• Down arrow: Decreases temperature setting or navigates menus.

7.2 Weekly Programming

The thermostat allows for weekly programming with 6 time-modes daily to optimize comfort and energy usage. To enter programming mode:

1. Ensure the thermostat is powered on.
2. Press and hold the 'M' (Mode) button for 3 seconds to enter the programming mode.
3. Use the 'Up' and 'Down' arrows to adjust the start time and temperature for each period.
4. Press 'M' again to cycle through the periods and days (5+2, 6+1, or 7-day programming options are available).
5. Once all settings are configured, press the power button to exit programming mode and save changes.

7.3 Children Lock

To activate the Children Lock function, press and hold the 'Up' and 'Down' buttons simultaneously for 3 seconds. A lock icon will appear on the display. Repeat the action to deactivate the lock.

8. Maintenance

To ensure the longevity and optimal performance of your AVATTO WT81 thermostat, follow these simple maintenance guidelines:

• Cleaning: Gently wipe the thermostat's screen and body with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the display or casing.
• Avoid Obstructions: Ensure that the thermostat's ventilation openings (if any) are not blocked by furniture, curtains, or other objects, as this can affect temperature readings.
• Environmental Conditions: Do not expose the thermostat to direct sunlight, excessive humidity, or extreme temperatures outside its operating range.

9. Troubleshooting

If you encounter issues with your thermostat, refer to the following common problems and solutions:

• Thermostat not powering on: Check the main circuit breaker to ensure power is supplied to the heating system and thermostat. Verify all wiring connections are secure.
• WiFi icon not flashing during setup: Ensure the thermostat is turned off, then press and hold the 'Up' and 'Down' buttons simultaneously for 5 seconds to enter connection mode.
• Unable to connect to APP: Confirm your WiFi network is 2.4GHz. Ensure the thermostat is in connection mode. Restart your router and try pairing again. Check app permissions on your smartphone.
• Inaccurate temperature readings: Ensure the internal sensor is not obstructed. If using an external floor sensor, verify its connection and placement. Avoid placing the thermostat near heat sources or drafts.
• Display color appears different: The thermostat features a glass mirror panel. Its color may appear to change slightly depending on the ambient lighting and environment. This is normal and not a defect.
• Heating system not responding: Check the thermostat's mode (Manual/Auto) and set temperature. Verify the wiring connections to your heating system (boiler, floor heating) are correct and secure.

10. User Tips

• Boiler Connection: For water/gas boiler systems, the 3A model of the WT81 thermostat utilizes a dry contact relay for connection. Ensure your boiler is compatible with this type of control.
• Energy Saving: Make full use of the weekly programmable feature to set different temperatures for various times of the day and week, optimizing energy consumption when you are away or asleep.
• Remote Access: Familiarize yourself with the Tuya Smart or Smart Life app to control your heating remotely, allowing you to adjust temperatures before arriving home or check settings while away.
• Voice Commands: Integrate with your preferred voice assistant (Alexa, Google Home, Yandex Alice) for quick and convenient temperature adjustments using simple voice commands.

11. Warranty and Support

The AVATTO WT81 Smart Thermostat comes with a 1-year warranty from the date of purchase, covering manufacturing defects. For technical assistance or warranty claims, please contact AVATTO customer support. All inquiries are typically answered within 24 hours.

12. Safety Information

• Always disconnect power at the circuit breaker before installing, cleaning, or performing any maintenance on the thermostat.
• Do not attempt to repair or modify the thermostat yourself. Refer all servicing to qualified personnel.
• Keep the device away from water, moisture, and high humidity environments.
• Do not expose the thermostat to open flames or extreme heat.
• Ensure proper grounding according to local electrical codes.
• This device is intended for indoor use only.