Quick Summary
HTW-WF03-3A3 is a WiFi water heating thermostat that supports 3A output, external sensor connection, and weekly programmable schedules for precise temperature management. The colourful LED display offers adjustable brightness, enabling clear readings in any environment.
On this page, we explain the thermostat’s key functions, wiring, technical parameters, and customisation options. You can also find guidance on project setup, common questions, and practical tips for smooth water heating control.
Key Functional Highlights
(This section introduces the main control functions and their engineering value in water heating systems.)
1- For Water Heating System
The thermostat delivers 3A output to manage water heating effectively. It ensures stable system operation and prevents overload. External sensors enhance control accuracy.
If the thermostat needs to control the electric underfloor heating system, one may refer to this model instead (please click → HTW-WF03-16A3).
2- LED Display
A colourful LED display shows temperature and status clearly. Brightness is adjustable for various lighting conditions. It improves interaction and monitoring efficiency.
3- Programmable Schedule
Weekly programming allows customised temperature settings. We can automate heating based on daily routines. This feature saves energy and increases system efficiency.
4- WiFi Connectivity
WiFi enables app and voice control. You can adjust settings remotely and integrate with smart home systems. It supports real-time monitoring and flexible operation.
5- External Sensor Support
The thermostat can connect to an external sensor. It improves measurement precision and system responsiveness. Ideal for distributed heating setups.
Product Design and Display
(This section shows the thermostat appearance, screen interface, or installation dimensions of this specific model.)
Technical Specifications
(This section lists the key technical parameters relevant to this thermostat model.)
| Parameter | Value |
|---|---|
| Power Supply | 100~240Vac, 50/60Hz |
| Output Load | 3A (water/boiler), 16A (electric floor) |
| Built-in Sensor | NTC3950, 10K |
| Setpoint Range | 5~35°C |
| Installation | 86×86 mm junction box / EU round box |
| Protection Class | IP20 |
| Warranty | 2 years |
Wiring Diagram
(This section provides the wiring diagram for this thermostat in the relevant HVAC control system.)
Model Code Guide
(This section explains what configuration the model code refers to.)
| Heating series | xx stands for |
|---|---|
| 3A | Water Heating, with NC+NO+COM output terminals |
| 16A | Electric Underfloor Heating, with L+N line voltage output terminals + External Sensor |
| NV | Boiler Heating, with Non-Voltage Dry Contact |
| 1/3 | 1 = standalone type; 3 = with WiFi communication |
Example HTW-WF11-xx: if xx = 16A3, it stands for electric floor heating with external sensor support and Wi-Fi function. Most sub-models are ready-made. Kindly contact us to confirm availability.
Project Fit & Customisation
(This section describes project suitability, system limitations, and available customization options.)
This thermostat is not suitable for BMS integration or fully standalone app-only control. It cannot directly handle high-voltage loads beyond its rated 3A. WiFi must be stable for remote functions to operate correctly.
Despite these limits, we can support customisation of communication protocols or external sensor types. Functional adjustments can be discussed with us for project-specific needs. Full guarantees for unlimited modification are not promised.
We also offer OEM customisation, including logo printing, colour changes, and label design. These options can be combined with standard functions for branding or project-specific appearance.
Certificates and Compliance
(This thermostat complies with European market requirements and is supported by certifications such as CE, RoHS, LVD test reports, EMC test reports, etc)
Exhibition Moments
(Our team regularly participates in international HVAC exhibitions such as Febrava in Brazil, The Big 5 in Dubai, and ISK-SODEX in Turkey, etc.)
Final Note
Heating projects need stable and predictable temperature control for efficiency. HTW-WF03-3A3 manages water heating precisely. It ensures smooth operation, energy management, and easier system maintenance.
