Quick Summary
The HTW-WF11-3A2 is a Water Heating Thermostat for indoor hydronic heating systems. It monitors room temperature and controls heating demand through valve switching logic. The controller includes an external temperature sensor option and RS485 Modbus communication. This Water Heating Thermostat also provides a simple time display for daily operation.
This page explains the Water Heating Thermostat design and its engineering context. It outlines control logic, wiring reference, and key parameters for project confirmation. It also explains model configuration rules and typical project adaptation. Several practical questions are included for system selection and project planning.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) Hydronic heating control logic
This function allows the thermostat to manage heating demand in water circulation systems. The controller compares room temperature with the setpoint value. Stable switching logic helps maintain consistent room comfort and prevents unnecessary heating cycles.
(02) External temperature sensing support
An external sensor can measure temperature from another location in the room. This improves control accuracy when the wall position does not represent real conditions. The system therefore maintains more stable heating regulation in practical installations.
(03) RS485 Modbus communication integration
The thermostat supports RS485 Modbus communication for system integration. A building controller can read room temperature and operating status. This Water Heating Thermostat can therefore participate in central monitoring and facility management.
(04) Time display for daily operation awareness
The display shows the current time during normal thermostat operation. This helps users understand operating conditions within the heating schedule context. Simple visual feedback supports routine system supervision without complex interface operations.
Display
(This section shows the product’s dimensions and the interface layout.)
Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 100–240Vac, 50/60Hz |
| Output Load | 3A for water or boiler heating |
| Built-in Sensor | NTC3950, 10K |
| External Sensor | Supported |
| Setpoint Range | 5–35°C |
| Communication | RS485 Modbus |
| Installation | 86×86 mm box or EU round box |
| Protection Class | IP20 |
Wiring
(This section provides the wiring reference diagram for correct installation.)
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 output terminals + External Sensor |
| NV | Boiler Heating, with Non-Voltage Dry Contact |
| 1 / 2 / 3 | 1 = Standalone, 2 = Modbus, 3 = Wi-Fi |
| Example | HTW-WF11-xx: if xx = 3A2, it stands for water heating with Modbus communication. Most sub-models are ready-made. Kindly contact us to confirm availability. |
Project Fit & Customisation
(This section explains where the product can be used, its limits, and OEM/ODM options.)
This Water Heating Thermostat is designed for hydronic heating control inside buildings. It is not suitable for electric floor heating systems requiring high current switching. The device also does not include Wi-Fi communication or mobile application control.
Despite these limits mentioned above, functional adjustments can still be discussed for projects. Communication protocol settings may be adapted for certain integration requirements. Program adjustments can also support specific control logic within reasonable project scope.
OEM cooperation is also supported for project deployment. Custom logo printing, label design, and colour adjustment can be arranged. These options help align the Water Heating Thermostat with brand identity or project specification.
Certifications
Exhibition Moments
Frequently Asked Questions
Q1. Can this Water Heating Thermostat control hydronic heating systems?
Yes. The thermostat is designed for water circulation heating control. It switches heating demand based on room temperature comparison.
Q2. Does the thermostat support an external temperature sensor?
Yes. An external sensor can measure temperature from another location. This improves accuracy when the installation wall is affected by airflow.
Q3. Can the Modbus thermostat connect to a building management system?
Yes. RS485 Modbus communication allows connection with many BMS controllers. Central systems can read room temperature and device status.
Q4. Is this thermostat suitable for electric underfloor heating systems?
No. This model is designed for hydronic water heating circuits. Electric floor heating requires the 16A output version.
Q5. What is the minimum order quantity and can I get samples?
Thermostat samples are available for testing and evaluation. The usual MOQ is around 300 units. Smaller trial orders such as 100 units may be discussed.
Q6. How can I place an order and arrange shipment?
Contact us to confirm the project requirements first. A PI will be issued afterwards. Payment methods include TT, PayPal, or Visa.
Q7. How long does product preparation normally take?
Standard samples usually ship within seven days. Customised versions require program adjustment and evaluation. Production for about 300 units normally takes around one month.
Q8. What shipping options are commonly used?
Courier delivery such as FedEx or DHL normally takes about seven days. Air freight has similar timing. Sea freight usually requires one month or longer.
Need Support?
If you are planning a water heating project, feel free to contact us. Our team can help discuss thermostat selection and application details. To find out more, please click here (Heating Thermostat).
Final Note
Heating projects require stable temperature regulation and reliable control of circulating water systems. The HTW-WF11-3A2 Water Heating Thermostat manages heating demand within hydronic systems. Stable room control improves comfort and supports efficient energy management in building heating operation.
