Quick Summary
The HTW-WF03-3A1 water heating thermostat provides stable 3A output control for valves or actuators. The device features a clear LED display with adjustable brightness. It supports weekly scheduling and external temperature sensing for reliable room temperature control.
This page describes its functions, wiring methods, and key technical parameters. It also outlines possible configuration options and common project questions. This helps engineers evaluate suitability and integration during project planning.
Key Functional Highlights
(This section introduces the main control functions and their engineering value in the specific HVAC system.)
1- Water Heating Control Output
This water heating thermostat provides stable 3A output for valve or actuator control. It fits typical hydronic room temperature regulation. The control logic keeps switching stable during daily heating operation.
2- LED Display and Interface
The LED display shows temperature clearly in different lighting conditions. Adjustable brightness helps reduce glare at night. This makes daily use more comfortable for users in homes or light commercial spaces.
3- Weekly Programmable Control
The programmable function lets users set heating schedules across the week. It helps reduce energy use during unoccupied periods. At the same time, comfort can still be maintained when needed.
4- External Sensor Support
This water heating thermostat supports connection of an external temperature sensor. It allows flexible sensor placement based on room layout. This helps improve control accuracy in uneven heating areas.
5- Low Temperature Protection
The device includes low temperature protection to help prevent freezing. Heating starts automatically when the temperature drops below the set level. This helps protect pipes and system components during long idle periods.
If a WiFi feature is also required apart from the above ones, one may refer to this model instead. (please click → HTW-WF03-3A3).
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 type), 16A (electric floor heating type) |
| Built-in Sensor | NTC3950, 10K |
| Setpoint Range | 5~35°C |
| Installation | 86×86 mm box or 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 |
| 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 water heating thermostat is not suitable for direct BMS integration systems. It does not support Modbus or advanced communication protocols. It also does not include Wi-Fi or app-based remote control. Projects needing central monitoring or cloud control may require other models.
Despite these limits mentioned above, some functions can still be customised. Communication method or control logic can be adjusted if needed. Changes depend on project quantity and technical feasibility. We can review your application together and suggest a suitable solution.
OEM customisation is also available for branding needs. This includes logo printing, panel colour changes, and label design. Packaging can also be adjusted if required. These options help match the product with your project identity.
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.)
Frequently Asked Questions
Q1: Can this water heating thermostat be used for electric floor heating systems?
This model is designed for water heating systems with 3A output. Electric floor heating usually needs 16A load capacity. Please choose the correct model based on the heating type.
Q2: Does it support an external temperature sensor?
Yes, this water heating thermostat supports an external sensor. It allows flexible placement for better temperature measurement. This helps improve control accuracy in different room conditions.
Q3: How does the low temperature protection function work?
The thermostat monitors room temperature continuously during standby. When temperature drops below the set value, heating starts automatically. This helps reduce freezing risk in unattended spaces.
Q4: Is it suitable for central control or BMS integration?
This model does not support communication protocols like Modbus. It is designed for standalone room control use. For central systems, other models should be considered.
Q5: What is the minimum order quantity and sample policy?
We support sample orders for testing and evaluation. Standard MOQ is around 300 units. Smaller trial quantities such as 100 units can also be discussed.
Q6: How to place an order and arrange shipment?
Please contact us to confirm your requirements and quantity. We will provide a PI for confirmation. Payment supports TT, PayPal, and Visa, with EXW, FOB, or DAP terms.
Q7: How long does production take?
Non-customised samples are usually shipped within 7 days. Custom samples may take 3–5 weeks depending on requirements. Bulk orders around 300 units usually take about one month.
Q8: What shipping methods are available?
Express delivery such as DHL or FedEx usually takes about 7 days. Air freight also takes around one week. Sea shipping may take over one month depending on destination.
Need Help Choosing the Right Model?
If you are planning a water heating project, feel free to contact us. We are happy to help review your needs and suggest suitable options.
Related Thermostat Models
For more details, please click here directly: Wi-Fi Thermostats | Electric Floor Thermostats | Water Heating Thermostats
Final Note
Heating projects often need stable temperature control under changing daily conditions. This water heating thermostat works as a local controller in water heating systems. It helps maintain stable heating, improves energy use, and supports simple facility management in real projects.
