Quick Summary
This Modulating Thermostat HTW-WF11-FVM is designed for fan coil units using EC Fan control. It supports 2-pipe systems with 0–10V modulating valve control. The thermostat regulates fan speed and valve opening according to room temperature. Both heating and cooling operation can be managed with stable modulation logic.
This page explains how the Modulating Thermostat works in EC Fan projects. It outlines control behaviour, wiring reference, and key technical parameters. Typical installation questions and configuration details are also clarified. Customisation options for project requirements are briefly introduced.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) EC Fan Speed Modulation
The thermostat outputs a 0–10V signal to control EC Fan speed smoothly. This avoids frequent switching and reduces noise. Gradual airflow adjustment helps maintain stable room temperature and improves overall comfort.
(02) Modulating Valve Control
The thermostat regulates the water valve using a 0–10V control signal. This allows gradual valve opening instead of simple on/off control. The result is steadier temperature control and reduced temperature fluctuation.
(03) Flexible Power Supply Options
The thermostat supports either 24V supply or 110–250V mains supply versions. This flexibility helps installers match different project electrical standards. It reduces additional power conversion equipment during deployment.
(04) Clear Time Display
The screen shows the current time during operation. This helps users quickly confirm the system status and working schedule. Clear information improves everyday usability in offices and hotel rooms.
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 | Fan Relay 5A; Valve Relay 5A |
| Built-in Sensor | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Installation Box | 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 & Customization
(This section explains where the product can be used, its limits, and OEM/ODM options.)
This Modulating Thermostat is a standalone controller. It does not support BMS integration or remote building management communication. Cloud platforms, mobile applications, and Wi-Fi connectivity are not available in this model.
Despite these limits mentioned above, function-level ODM adjustments can be discussed. Some projects require different control logic or interface behaviour. Our engineers can review technical feasibility before confirming development options.
OEM service is also available for brand-related requirements. Logo printing, panel colour changes, and customised labels can be arranged. Packaging and documentation adjustments can also be discussed for project delivery.
Certifications
Exhibition Moments
Frequently Asked Questions
1. Can this Modulating Thermostat control EC Fan units directly?
Yes, the thermostat provides a 0–10V output signal for EC Fan speed control. This signal allows smooth fan modulation instead of step-based fan switching.
2. Does the thermostat support both heating and cooling operation?
Yes, the thermostat works with 2-pipe fan coil systems. It controls the modulating valve and EC Fan to maintain stable room temperature.
3. Is special wiring required for the modulating valve?
The valve must support 0–10V control input. Correct wiring should follow the provided diagram to ensure accurate modulation control.
4. Do you provide samples and what is the minimum order quantity?
Yes, thermostat samples are available for evaluation. The usual minimum order quantity is 300 units, though smaller trial batches can sometimes be discussed.
5. How can we place an order?
Please contact us to confirm project requirements. After confirmation, we will provide a proforma invoice. Payment methods include TT, PayPal, Visa, and similar options.
6. How are the products normally shipped?
Courier door-to-door delivery is commonly recommended and usually takes around seven days. Air freight also takes about seven days, while sea shipping normally requires over one month.
Need Support?
If you are selecting a Modulating Thermostat for an EC Fan project, feel free to contact us. Our team can help review system compatibility and application details.
