Quick Summary
This HTW-EB-FC-4W24 (24V WiFi thermostat) is designed for 4-pipe fan coil units with two-wire heating and cooling motorized valves. It supports 24V power supply, WiFi connection, and negative backlight display. The unit monitors temperature and operates the fan and valves to maintain accurate comfort control in indoor spaces.
The following sections cover functional significance, wiring diagrams, technical specifications, configuration guidance, customization possibilities, and answers to common project deployment questions. Users can reference these details to confirm system compatibility and project planning.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) Accurate Temperature Sensing
The 24V WiFi thermostat measures room temperature within ±0.5°C accuracy, enabling precise fan and valve control. This ensures stable comfort and reduces energy waste in FCU projects. For the 110V or 220V version, please refer to this link: HTW-EB-FC-4W.
(02) WiFi Connectivity
WiFi allows remote monitoring and configuration. Engineers can integrate the thermostat into building systems or mobile apps for project deployment verification without physical access.
(03) 4-Pipe System Control
This 24V WiFi Thermostat supports both heating and cooling simultaneously via separate valves. This allows flexible FCU projects to serve complex zones while maintaining independent temperature control.
(04) Fan Coil and Valve Coordination
This 24V WiFi Thermostat controls a 3-speed fan and two wired motorized valves. Synchronised operation ensures smooth temperature adjustments and avoids unnecessary cycling, enhancing system reliability.
Display
(This section shows this 24V WiFi Thermostat’s dimensions and the interface layout.)
Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 95–240 VAC |
| Frequency | 50/60 Hz |
| Fan Relay Load | 5A (3A inductive) |
| Valve Relay Load | 3A (1A inductive) |
| Accuracy | ±0.5°C / ±1°F |
| Storage Temperature | -5~45°C |
| Setpoint Range | 5~35°C |
| 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.)
| Fan coil series | xx stands for |
|---|---|
| 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 |
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 24V WiFi thermostat is designed for indoor FCU projects. Standalone operation does not support full BMS integration. It is unsuitable for high-humidity or outdoor environments and should not exceed the set voltage range. Engineers must confirm system compatibility before deployment.
Despite these limits, we can support ODM function customisation. Specific firmware, control logic adjustments, or WiFi interface modifications can be discussed to meet project requirements. Custom solutions are coordinated case by case.
OEM options are available, including logo printing, colour variation, and labelling. These customisations allow consistent branding and project identification without affecting functional reliability.
Certifications
Exhibition Moments
Frequently Asked Questions
Q1: Which FCU systems is this thermostat compatible with?
This 24V WiFi Thermostat works with 2-pipe and 4-pipe fan coil units, controlling fans and valves for both heating and cooling operations.
Q2: Can it integrate with building management systems?
Modbus or BACnet variants allow integration. Standard WiFi models are standalone and require external gateways for BMS connectivity.
Q3: How is installation handled?
This 24V WiFi Thermostat mounts on standard EU or electric box housing. Wiring diagrams are provided to ensure correct fan and valve connection.
Q4: What is the minimum order quantity and sample availability?
Samples are available. Typical minimum order quantity is 300 units, but smaller orders can be discussed case by case.
Q5: How can I place an order?
Please contact us. After confirming your requirements, we provide a proforma invoice. Payment accepted via TT, Paypal, Visa. Terms support EXW, FOB, DAP, and more.
Q6: How will the thermostat be shipped?
We recommend courier delivery, usually 7 days. Air freight also takes 7 days. Sea freight may take 30+ days depending on destination.
Need Project Support?
For project guidance or technical support, please contact us. Our engineers can advise on FCU thermostat deployment, wiring, and customisation options.
