Quick Summary
This fan coil thermostat is designed for FCU system with 3-speed fan control and 4-pipe on/off valve outputs. It is used in indoor for both heating and cooling operation. It supports basic programming, an energy-saving mode, and a key lock function. These functions help maintain room temperature stability, reduce unnecessary operations, and limit unwanted user changes.
This page explains how this fan coil thermostat works in a system, what functions it supports, and how it fits typical projects. It also covers wiring, key parameters, installation considerations, and possible customization options for different applications.
Key Functional Highlights
1- Fan and Valve Control
This fan coil thermostat controls a 3-speed fan and 4-pipe on/off valves. This allows clear separation of heating and cooling circuits in standard fan coil systems and ensures stable temperature control.
2- Programming Function
Basic scheduling allows the system to run automatically based on time settings. This helps reduce manual operation and supports predictable comfort in daily use.
3- Energy-Saving Mode
Energy-saving mode limits unnecessary fan and valve operation when full output is not needed. It helps lower energy use while keeping acceptable comfort levels.
4- Key Lock
This programmable thermostat supports a key lock function, which prevents unintended changes to settings during operation. This is useful in public areas, rental properties, or projects with many end users.
Display
Specifications
| 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 |
| Protection Class | IP20 |
| Warranty | 2 Year |
| Installation Box | EU round box or Standard 86x86mm Box |
Wiring
Guide
| HTW fan coil series | xx stands for |
|---|---|
| EC | EC fan |
| 2/4 | 2 for 2-pipe; 4 for 4-pipe |
| 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 valve |
Example HTW-WF11-FC-xx: if xx = 2EN, it indicates a 3-speed fan, a 2-pipe system with on/off valve control, an external sensor function, and Modbus communication. Most sub-models are ready-made. Kindly contact us to confirm availability.
Project Fit & Customization
The HTW-WF11-FC-4 fan coil thermostat is intended for standalone FCU systems. It is not designed for direct connection to complex building management systems without extra gateways or controllers. Projects that require central monitoring, remote scheduling, or full BMS integration should consider other solutions.
This model uses on/off valve control. Applications that require modulating valve control are not suitable.
Despite these limits, ODM function customization can be discussed. This includes changes to control logic, programming behavior, fan response, or energy-saving rules. OEM customization is also supported, such as logo printing, colour adjustment, and label customization.
Frequently Asked Questions
1- What type of fan coil systems can this thermostat be used for?
This fan coil thermostat is made for 3-speed fans and 4-pipe on/off valve control. It supports both heating and cooling operation in typical FCU projects.
2- Does the thermostat support programming and energy-saving functions?
Yes. Programming and energy-saving modes are built in. They help automate operation and reduce unnecessary energy use during low-demand periods.
3- How is the thermostat installed in a project?
It is installed in an EU round box or a standard 86x86mm box. Wiring follows common fan coil installation practices.
4- What is the minimum order quantity and are samples available?
Samples are supported for evaluation. The typical minimum order quantity is 300 units, but smaller quantities can be discussed.
5- How do I place an order?
Please contact us. After confirming requirements, we provide a proforma invoice for your reference; payment supports TT, Paypal, Visa, etc., terms EXW, FOB, DAP.
6- How is delivery arranged?
Door-to-door express delivery is usually recommended and takes about 7 days. Air freight is similar, while sea freight takes one month or more, depending on the destination.
