Quick Summary
The HTW-WF02-FC-4W WiFi Thermostat for 4 Pipe is designed for fan coil systems with independent heating and cooling circuits. It controls a 3-speed fan and two on/off motorised valves for heat and cool operation. The thermostat supports WiFi connection for remote access through mobile applications, providing flexible control across different rooms.
This page explains how the WiFi Thermostat for 4 Pipe works in FCU systems and why its control logic suits modern building projects. It also includes wiring reference, key parameters, and model selection guidance, followed by project considerations, customisation options, and common questions with clear answers.
Key Features
(This section explains the core control functions and their practical value.)
(01) 4-pipe system control
The WiFi Thermostat for 4 Pipe supports independent heating and cooling circuits. This improves temperature stability and avoids seasonal switching, making it suitable for hotels and office environments. Another model HTW-WF02-FC-2W can is designed for 2 pipe system with WiFi function.
(02) WiFi remote management
The WiFi Thermostat for 4 Pipe allows remote control through mobile applications. This helps facility teams manage multiple rooms efficiently and reduces manual adjustment work.
(03) 3-speed fan control
Three fan speeds provide flexible airflow adjustment. This supports stable comfort and helps balance noise and performance across different room conditions.
(04) On/off valve control
The thermostat controls separate on/off motorised valves for heating and cooling. This matches common FCU system design and ensures simple and reliable operation.
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 | 110-240VAC |
| 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-WF02-FC-xx: if xx = 4W, it stands for a 4-pipe system with on/off valve control and WiFi 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.)
The WiFi Thermostat for 4 Pipe is suitable for FCU systems requiring remote control and flexible room management. It is not suitable for projects needing Modbus or BACnet integration with building management systems.
Despite these limits mentioned above, ODM customisation can be discussed based on project requirements. Communication methods or control logic may be adjusted where feasible depending on system compatibility and project scale.
OEM customisation is also supported. Options include logo printing, colour customisation, and label design. These help align the thermostat with project branding and installation needs.
Certificates and Compliance
Frequently Asked Questions
Q1. Can this thermostat be used in 2-pipe systems?
No, this model is designed for 4-pipe systems with independent heating and cooling control.
Q2. Does it support remote control?
Yes, the WiFi Thermostat for 4 Pipe supports mobile app control through WiFi connection.
Q3. Can it be connected to a BMS system?
No, this model uses WiFi and 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-based control, you may refer to /products/htw-wf02-fc-4n, or contact us for project selection support. You can refer to below links:
