VEYFIY RF Wireless Boiler Thermostat WiTH3 User Manual

1. Introduction

The VEYFIY RF Wireless Boiler Thermostat WiTH3 provides advanced control over your heating system. This device allows for remote temperature management via the Tuya Smart app (with compatible gateway or Wi-Fi variant), programmable heating schedules, and precise temperature adjustments using a rotary knob. It also features a real-time environment display and an antifreeze function for enhanced system protection.

Key Features:

• Remote Temperature Control: Manage your boiler temperature from anywhere using the Tuya Smart app (requires compatible gateway or Wi-Fi variant).
• Programmable Heating Schedules: Customize heating periods to optimize comfort and energy efficiency.
• Precise Rotary Adjustment: Fine-tune temperature settings with a rotary knob, switchable between Celsius and Fahrenheit.
• Real-Time Environment Display: View current weather data and indoor humidity on the large screen.
• Antifreeze Function: Helps prevent pipe damage in cold weather.
• Memory Recovery: Restores previous settings automatically after power outages.

2. Package Contents

Verify that all items listed below are included in your package:

• 1 x VEYFIY RF Wireless Boiler Thermostat (WiTH3)
• 1 x Receiver Unit
• 1 x USB Power Cable
• 1 x Set of Wiring Cables
• 2 x Mounting Screws
• Note: Batteries are not included.

Image: All components included in the VEYFIY RF Wireless Boiler Thermostat WiTH3 package. This includes the main thermostat unit, the wireless receiver, a USB power cable, a set of wiring cables for installation, and two mounting screws. Please note that batteries for the thermostat are not supplied and must be purchased separately.

3. Specifications

Image: Detailed dimensions of the VEYFIY RF Wireless Boiler Thermostat (left) and its receiver unit (right). The thermostat measures 118mm in length, 86mm in width, and 24mm in depth. The receiver measures 86mm in length, 86mm in width, and 26mm in depth. These measurements are crucial for planning installation space.

4. Safety Information

• Professional Installation Recommended: Wiring requires professional or qualified electricians. Power off all cables before installation.
• Wiring Precautions:
  • COM and NO connect the gas boiler signal line (Dry contact).
  • If COM introduces a live wire (L), NO can be connected to a 190W pump or a normally closed actuator.
  • L connects the live wire, N connects the zero line.
  • L1 connects the load live wire, N1 connects the load zero line.
• Power Source: Ensure the correct power supply is used. Do not use damaged cables or adapters.
• Water Exposure: Avoid exposing the device to water or excessive humidity.
• Disassembly: Do not attempt to disassemble or repair the device yourself. Contact qualified personnel for service.
• Children: Keep the device out of reach of children.

Image: Rear view of the thermostat (left) and receiver (right). The thermostat's back panel shows the battery compartment and USB power input. The receiver's back panel displays wiring terminals with safety tips, emphasizing the need for professional wiring. It also indicates that the LCD keeps lighting only when using USB power, and in battery mode, the backlight enters power-saving mode.

5. Setup

5.1. Installation

1. Choose Location: Select a central location for the thermostat, away from direct sunlight, drafts, or heat sources, to ensure accurate temperature readings.
2. Mounting: Use the provided screws to mount the thermostat and receiver units securely to a wall or suitable surface.
3. Wiring (Receiver):
   • IMPORTANT: Ensure main power to the boiler system is turned OFF at the circuit breaker before proceeding with any wiring.
   • Connect the receiver to your boiler system according to the wiring diagram provided on the back of the receiver unit and the safety tips mentioned in Section 4.
   • If unsure, consult a qualified electrician.
4. Powering the Thermostat: Insert batteries (not included) into the thermostat unit or connect it via the USB power cable for continuous backlight.

5.2. Initial Pairing (Thermostat and Receiver)

The thermostat and receiver are typically pre-paired from the factory. If they are not communicating or if you need to re-pair them:

1. Ensure both the thermostat and receiver are powered on.
2. Refer to the specific pairing instructions in the detailed manual (if provided separately) or contact customer support.

5.3. Tuya Smart App Integration (Optional, for Wi-Fi variant or with compatible gateway)

While this model is an RF wireless thermostat, some variants offer Wi-Fi connectivity for Tuya Smart app control, or it can be integrated via a compatible smart home gateway. If your setup supports Wi-Fi or a gateway:

1. Download the "Tuya Smart" app from your smartphone's app store.
2. Register or log in to your account.
3. Follow the in-app instructions to add a new device. This typically involves putting the thermostat into pairing mode (refer to the device's screen or specific instructions for Wi-Fi pairing).
4. Connect the thermostat to your home Wi-Fi network via the app (if direct Wi-Fi model) or connect the gateway to the app and then pair the RF thermostat to the gateway.

6. Operating Instructions

6.1. Basic Operation

• Power On/Off: Use the designated button or menu option to turn the thermostat on or off.
• Display: The large screen displays current room temperature, set temperature, time, and other environmental data like humidity.
• Rotary Knob: Rotate the knob to adjust the desired temperature. Press the knob to confirm selections or access menus.

Image: The VEYFIY RF Wireless Boiler Thermostat with its clear digital display showing room temperature, set temperature, time, and other icons. The prominent rotary knob at the bottom allows for easy temperature adjustment and menu navigation.

6.2. Setting Temperature

1. Rotate the knob clockwise to increase the set temperature, or counter-clockwise to decrease it.
2. The new set temperature will be displayed. The system will adjust heating to reach this target.
3. To switch between Celsius and Fahrenheit, access the system settings menu (refer to the detailed manual for specific steps).

6.3. Programmable Heating Schedules

The thermostat allows you to set custom heating schedules for different times of the day and days of the week. This feature helps save energy by heating only when needed.

1. Access the "Schedule" or "Program" menu via the thermostat's interface (or Tuya Smart app if applicable).
2. Set desired temperatures for various time periods (e.g., morning, day, evening, night) for each day.
3. Save your schedule. The thermostat will automatically follow these settings.

6.4. Antifreeze Function

The antifreeze function automatically activates heating if the ambient temperature drops below a preset minimum (typically 5°C / 41°F) to prevent pipes from freezing. This function is usually enabled by default. Check system settings to confirm or adjust.

7. Maintenance

• Cleaning: Wipe the thermostat and receiver with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Battery Replacement: If using batteries, replace them when the low battery indicator appears on the display. Ensure correct polarity.
• Firmware Updates: If connected to the Tuya Smart app, check for available firmware updates periodically to ensure optimal performance and new features.

8. Troubleshooting

9. Warranty and Support

For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official VEYFIY website. You may also contact VEYFIY customer service directly for assistance with product setup, operation, or troubleshooting.

Manufacturer: VEYFIY

Date First Available: October 28, 2025