Quick Summary
The HTW-WF03-FC-2W WiFi Thermostat is designed for 2-pipe fan coil systems using a shared water loop for heating and cooling. It controls a 3-speed fan and two motorised valves with on/off logic. The built-in WiFi Thermostat function enables remote control through mobile applications for flexible operation.
This page explains how the WiFi Thermostat works in FCU systems and how it improves daily control and user convenience. It also includes wiring reference, technical parameters, and model guidance, followed by project considerations, customisation options, and practical questions with clear answers.
Key Features
(This section explains the core control functions and their practical value.)
(01) WiFi remote control
The WiFi Thermostat allows users to control temperature remotely through a mobile app. This improves convenience and reduces the need for manual adjustment on site.
(02) 2-pipe system compatibility
The WiFi Thermostat is designed for systems using a shared heating and cooling water loop. This simplifies system design and supports stable daily operation. If you are interested in the same model for 4-pipe system with WiFi function, please click on this link: HTW-WF03-FC-4W.
(03) On/off valve control
The WiFi Thermostat controls motorised valves with standard on/off logic. This ensures compatibility with common FCU installations and reliable system performance.
(04) 3-speed fan control
Three fan speeds provide flexible airflow adjustment. This helps maintain indoor comfort while balancing noise levels and system efficiency.
Product Design and Display
(This section shows the product’s dimensions and the interface layout.)
Technical Specifications
(This section lists the key parameters for reference and project confirmation.)
| Power Supply | 95~240VAC |
| Frequency | 50/60Hz |
| Fan Relay Load | 5A (3A inductive) |
| Valve Relay Load | 3A (1A inductive) |
| Accuracy | ±0.5°C or ±1°F |
| Sensor | NTC3950, 10K |
| Setpoint Range | 5~35°C |
| Installation | EU or standard electric box |
Wiring Diagram
(This section provides the wiring reference diagram for correct installation.)
Model Code 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 |
| Example | HTW-WF03-FC-xx: if xx = 2W, it stands for a 2-pipe system with on/off valve control and WiFi function. 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.)
The WiFi Thermostat is suitable for FCU systems requiring remote control through mobile applications. It is not suitable for projects needing Modbus or BACnet communication for BMS integration.
Despite these limits mentioned above, ODM customisation can be discussed based on project needs. Communication methods or interface design may be adjusted depending on system requirements.
OEM customisation is also supported. Options include logo printing, colour customisation, and label design. These help align the thermostat with project branding and installation standards.
Certificates and Compliance
Frequently Asked Questions
Q1. Can this thermostat be controlled remotely?
Yes, the WiFi Thermostat supports mobile app control for remote temperature adjustment.
Q2. Is it suitable for 4-pipe systems?
No, this model is designed for 2-pipe systems with shared heating and cooling circuits.
Q3. Does it support BMS integration?
No, this WiFi Thermostat does not support Modbus or BACnet communication.
Q4. Do you support samples and what is the MOQ?
Yes, samples are available. MOQ is usually 300 units, but smaller quantities can be discussed.
Q5. How can we place an order?
Please contact us to confirm requirements. We will issue a PI. Payment supports TT, PayPal, Visa. Terms include EXW, FOB, DAP.
Q6. How will the goods be shipped?
Courier delivery takes about 7 days. Air freight is similar. Sea shipping usually takes over one month depending on destination.
Related Thermostat Models
For Modbus versions, you may refer to /products/htw-wf03-fc-2n, or contact us for project selection support. You can refer to below links:
The WiFi Thermostat suits 2-pipe FCU systems needing remote control. It supports stable operation. It helps improve convenience and daily temperature management. 【More models: fan coil thermostat】
