Quick Summary
The HTW-WF01-3A2 Heating Thermostat with Modbus is designed for water heating systems. It controls heating through NC, NO, and COM output terminals. The thermostat operates on a 100–240 Vac power supply. Built-in sensing and external sensor support help maintain stable indoor temperature.
This page explains how the Heating Thermostat with Modbus works in HVAC installations. It introduces control functions, wiring reference, and key parameters. Modbus communication and system integration are also explained. OEM and ODM options for the Heating Thermostat with Modbus may be discussed.
Key Features
(The core control functions and their practical value)
1. Water Heating Output Control
This Heating Thermostat with Modbus provides a 3A control output for water heating systems. NC, NO, and COM terminals allow flexible wiring. This design suits valves or circulation pumps used in heating systems.
2. Modbus RS485 Communication
The thermostat supports Modbus communication through an RS485 interface. Building systems can read temperature data remotely. This allows central monitoring and control in HVAC projects.(if you need wifi, click here)
3. Programmable Heating Schedule
The thermostat supports programmable heating periods during the day. Users can set different temperatures for different time blocks. This helps maintain comfort while reducing energy consumption.
4. External Sensor Temperature Detection
The thermostat supports connection with an external temperature sensor. The sensor continuously monitors the heating system temperature. This protection helps prevent overheating and ensures safe and stable operation.
Product Design and Display
(The product’s dimensions and the interface layout)
Technical Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 100–240 Vac, 50/60 Hz |
| Output Load | 3A for water/boiler heating type; 16A for electric floor heating type |
| Built-in Sensor | NTC3950, 10K |
| Setpoint Range | 5–35°C |
| Installation | 86×86 mm junction box or EU round box |
| Protection Class | IP20 |
| External Sensor | Supported |
| Warranty | 2 years |
Wiring Diagram
(The wiring reference diagram for correct installation.)
Model Code Guide
(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 / 2 / 3 | 1 = Standalone, 2 = Modbus, 3 = Wi-Fi |
| Example HTW-WF01-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 & Customization
(Where the product can be used, its limits, and OEM/ODM options)
This Heating Thermostat with Modbus is designed for water heating systems. It cannot directly switch electric floor heating loads. Installations requiring WiFi control should use other thermostat versions. Systems that require high voltage switching should also select different models.
Despite these limits mentioned above, ODM cooperation may still be discussed. Communication parameters or control logic may be adjusted for projects. Our engineers review heating system requirements before confirming suitable technical solutions.
OEM customisation is also supported for brand projects. Logo printing on the thermostat panel can be arranged. Product labels and packaging design can also be customised. These options help the Heating Thermostat with Modbus match different market needs.
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. What systems can this Heating Thermostat with Modbus control?
It is designed for water heating systems using valve or pump control signals through NC, NO, and COM terminals.
Q2. Does the thermostat support Modbus communication?
Yes. The thermostat supports Modbus communication through an RS485 interface for integration with building management systems.
Q3. Is the thermostat compatible with standard wall boxes?
Yes. The thermostat fits 86×86 mm junction boxes and EU round boxes widely used in heating installations.
Q4. What is the minimum order quantity and are samples available?
Samples are available for testing. The usual minimum order quantity is around 300 pieces, though smaller trial quantities may be discussed.
Q5. How can we place an order?
Please contact us with your requirements. After confirmation we issue a proforma invoice. Payment supports TT, PayPal, Visa and similar methods.
Q6. How are the products usually shipped?
Express delivery normally takes about seven days. Air freight takes similar time. Sea shipping usually requires more than one month.
Need Support?
If you need help selecting a Heating Thermostat with Modbus for your project, please contact us. Our team can assist with system integration and wiring confirmation.
Related Thermostat Models
More product details, please click directly:
Electric Underfloor Heating Thermostat
