Quick Summary
This page explains the control functions and project value of this Modbus thermostat. It also outlines system control logic and key technical parameters. Typical installation considerations and common project questions are included. Possible project customisation options are also briefly discussed.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) 0–10V EC Fan Control
This Modbus thermostat regulates EC fan speed through a stable 0–10V output signal. Smooth fan speed adjustment improves comfort and lowers noise levels. It also helps reduce energy use in fan coil applications.
(02) 2/4-Pipe On/Off Valve Control
The thermostat supports both 2-pipe and 4-pipe fan coil systems. Relay outputs control heating or cooling valves reliably. This configuration suits common hotel and commercial building HVAC layouts.
(03) Keycard Energy Saving Function
The thermostat supports hotel keycard input for room occupancy control. When the keycard is removed, the system can enter standby mode. This helps reduce unnecessary energy use in guest rooms.
(04) External Sensor Support
An external temperature sensor can be connected when remote sensing is required. This improves measurement accuracy in complex spaces. It also helps avoid influence from nearby heat sources.
(05) RS485 Modbus Communication
RS485 Modbus allows the thermostat to communicate with building control systems. Central systems can read room temperature and adjust settings remotely. This improves monitoring efficiency in large projects.
If one is also looking for a Wi-Fi (app control) function, this model may be referred to (HTW-FC08-ECNW), which also supports Modbus, ec fan control, etc.
(06) Automatic Heating and Cooling Changeover
The thermostat automatically switches between heating and cooling based on the set-point and room temperature. This function works for both 2-pipe and 4-pipe fan coil systems. It helps maintain stable comfort and reduces manual adjustment.
(07) Set Point Limitation
The thermostat allows setting upper and lower temperature limits for the set-point. This helps prevent users from selecting extreme temperatures. It supports stable operation and improves energy management in hotels and commercial buildings.
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 | 95~240Vac, 50/60Hz |
| Current Load | EC Fan DC 0-10V; Valve Relay 5A |
| Built-in Sensor | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Installation | Flush-mounted; EU round box or 86×86mm box |
| Warranty | 2 Year |
Wiring
(This section provides the wiring reference diagram for correct installation.)
Guide
(This section explains what configuration the model code refers to.)
| Fan coil series | xx stands for |
| EC | EC fan |
| 2/4 | 2 for 2-pipe on/off; 4 for 4-pipe on/off system |
| M | Modulating valve control |
| W | Wi-Fi |
| N/B | N for Modbus; B for BACnet |
| K/E | K for Keycard; E for External sensor |
| 24 | Powered by 24V, or with 24V output for 0-10V valve |
| Example HTW-WF11-FC-xx | If xx = 2EN, it stands for a 3-speed fan, 2-pipe system with on/off valve control, external sensor function, and 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 Modbus thermostat is not intended for simple standalone heating systems. It is also not designed for Wi-Fi smart home control platforms. Projects requiring mobile app control, cloud access, or smart home integration should use other thermostat types.
Despite these limitations mentioned above, some functional adjustments may still be considered. For example, projects may request Wi-Fi communication instead of Modbus. Sensor configuration or control logic can also be discussed based on project needs. Final feasibility depends on technical evaluation and project volume.
OEM cooperation is also supported for project deployment. Options include logo printing, label customisation, and colour adjustments. Packaging design and branding elements can also be discussed for batch orders.
Certifications
Exhibition Moments
Frequently Asked Questions
1. Can this Modbus thermostat work with EC fan fan coil units?
Yes. This Modbus thermostat is designed for fan coil units using EC fan control. The 0–10V output signal regulates fan speed smoothly.
2. Does this thermostat support an external temperature sensor?
Yes, an external sensor can be connected when remote temperature sensing is needed. This is useful when the thermostat location does not reflect the actual room temperature.
3. Can this Modbus thermostat connect to a building management system?
Yes. RS485 Modbus communication allows connection to many building management systems. The central system can monitor room temperature and adjust settings if required.
4. Can the thermostat functions be customised for specific projects?
Some functional adjustments may be discussed for projects. Communication protocol, control logic, or sensor options may be adapted after technical evaluation.
5. What is the minimum order quantity and can I get samples?
Thermostat samples are available for testing and evaluation. The usual minimum order quantity is about 300 units, but smaller quantities may also be discussed.
6. How can I place an order?
Please contact us with your project requirements first. After confirming the details, we will provide a proforma invoice. Payment methods include TT, PayPal, Visa and other common options.
7. When can I receive the products?
Non-customised samples are usually dispatched within 7 days. Batch orders such as 300 units normally require about one month preparation.
As for shipping, courier delivery is often recommended and takes around 7 days. Air freight takes similar time, while sea shipping usually requires about one month or more. Shipping method depends on project arrangements.
Need Support?
If you need help selecting an EC fan thermostat for your project, please contact us. Our team can assist with application advice, system compatibility checks, and configuration discussions~
