Quick Summary
The HTW-FC09-FVMN-24WF WiFi modulating thermostat is designed for fan coil systems. It supports a 3-speed fan and EC fan control. It works with 2-pipe systems using 0–10V modulating valve control. A built-in transformer provides a stable 24V output for the valve.
This page explains how this WiFi modulating thermostat works in real projects. It covers control logic, key parameters, and wiring guidance. It also helps with model selection and common questions. Customisation options are included for project-specific needs.
Key Functional Highlights
(This section introduces the main control functions and their engineering value in the specific HVAC system.)
(01) 3-speed fan and EC fan
This WiFi modulating thermostat supports both standard and EC fans. It allows flexible use across different FCU designs. This helps simplify selection during project planning and reduces compatibility issues on site.
(02) 2 pipe, 0–10V modulating Valve Control
The modulating thermostat uses 0–10V output for valve control. It adjusts water flow smoothly instead of switching on and off. This improves temperature stability and reduces system cycling during daily operation.
(03) Built-in transformer, 24V output for valve
A built-in transformer provides 24V output for the valve. This removes the need for external power for the actuator. It simplifies wiring and helps reduce installation errors in site conditions.
(04) WiFi (app control and group control via app)
WiFi allows remote control through a mobile app. Multiple units can be grouped for central control. This improves efficiency in hotels, offices, or large projects with many rooms.
If the building management system requires other communications, like Modbus, one may refer to this model instead (please click → HTW-FC09-FVMN-24S).
(05) Power failure memory
The thermostat remembers settings after a power cut. It returns to the previous state when power is restored. This avoids a manual reset and keeps the system operation stable.
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 | 95~240Vac, 50/60Hz |
| Fan Relay | 5A |
| Sensor Type | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Control Type | 0–10V modulating |
| Installation | Standard 86x86mm Box |
| 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.)
| HTW-FC09-xxx | xx stands for |
| FVM | 0-10V EC fan + Modulating valve |
| 24 | with 24V output for 0-10V valve |
| WF | Wi-Fi |
| ZB | Zigbee communication |
| K/S | K = Keycard; S = External sensor |
| Example HTW-FC09-FVMN-24K: it stands for the model with EC fan, 0-10V valve control, a built-in transformer featuring 24VDC output, Modbus and Keycard. For more details, kindly contact us to confirm availability. | |
Project Fit & Customisation
(This section describes project suitability, system limitations, and available customisation options.)
This WiFi modulating thermostat is not suitable for 4-pipe systems. It does not support on/off valve control types. It is also not designed for direct BMS integration without protocol options.
Despite these limitations mentioned above, ODM customisation is available. Functions like Modbus or BACnet can be added based on project needs. Additional inputs or logic adjustments can also be discussed with the engineering team.
OEM customisation is also supported for branding and packaging. Logo printing, label design, and colour changes can be arranged. These options help match project or client requirements.
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 thermostat work with EC fans and standard fans?
Yes, it supports both EC fans and 3-speed AC fans. This gives more flexibility in system design. It helps reduce the need for different thermostat models.
Q2: How does the 0–10V modulating control improve performance?
It adjusts valve opening gradually based on demand. This keeps the room temperature more stable. It also reduces frequent switching of the system.
Q3: Does it need an external power supply for the valve?
No, it has a built-in transformer for 24V output. The valve can be powered directly from the thermostat. This simplifies wiring on site.
Q4: Can it connect to a building management system?
This WiFi modulating thermostat does not include BMS protocol by default. However, Modbus or BACnet can be added by customisation. This depends on project requirements.
Q5: What is the MOQ, and can I get samples?
We support sample orders for testing. Standard MOQ is 300 units. Smaller trial orders like 100 units can be discussed.
Q6: How do I place an order and arrange shipment?
Contact us to confirm your requirements first. We will provide a PI for confirmation. Payment methods include TT, PayPal, and Visa, with EXW, FOB, or DAP terms.
Q7: How long does production take?
Non-custom samples are ready within 7 days. Custom orders take about 3 to 5 weeks. Bulk orders like 300 units usually need around one month.
Q8: What shipping methods are available?
Courier delivery like DHL or FedEx takes about 7 days. Air freight is similar in time. Sea shipping takes around one month depending on destination.
Need Help Choosing the Right Model?
If you are unsure about selection, feel free to contact us~ We can help review your project and suggest a suitable modulating thermostat.
Related Thermostat Models
For more details, please click here directly: Wi-Fi Thermostats | Modbus Thermostats | BACnet Thermostats
Final Note
Fan coil projects require stable control and flexible system integration. This WiFi modulating thermostat manages fan speed and valve output precisely. It helps improve comfort, supports central management, and keeps daily operations reliable.
