Quick Summary
The HTW-EB-FC-FC-4W WiFi Thermostat is designed for 4-pipe fan coil systems with independent heating and cooling circuits. It controls a 3-speed fan and two motorised valves. The WiFi Thermostat enables remote control through app connection, improving flexibility and daily operation.
This page explains how the WiFi Thermostat works in FCU systems and what it means in real projects. It includes wiring reference, technical parameters, and model code explanation, followed by project fit guidance, customisation options, and common questions.
Key Features
(This section explains the core control functions and their practical value.)
(01) Remote access with WiFi control
The WiFi Thermostat allows remote adjustment through mobile applications. This improves system accessibility and supports flexible temperature management without needing direct interaction with the device.
(02) Independent 4-pipe system control
The WiFi Thermostat supports separate heating and cooling control. This ensures stable indoor comfort in projects where both functions operate independently. If you need the thermostat for 2-pipe system with WiFi function, please refer to this link: HTW-EB-FC-2W.
(03) 3-speed fan control
The WiFi Thermostat provides selectable fan speeds for airflow adjustment. This supports better comfort control and ensures stable system operation in different load conditions.
(04) Clear display with backlight
The WiFi Thermostat uses a negative black backlight interface. This improves visibility and supports easy operation in different lighting environments.
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-WF11-FC-xx: if xx = 4W, it stands for a 4-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 4-pipe FCU systems where remote control and flexible operation are required. It is not suitable for projects requiring Modbus or BACnet integration.
Despite these limits mentioned above, ODM customisation can be discussed. Communication protocols or interface adjustments may be evaluated based on project requirements.
OEM customisation is also supported. Options include logo printing, colour changes, and label design. This helps align the thermostat with project branding and system standards.
Certificates and Compliance
Frequently Asked Questions
Q1. Is this thermostat suitable for 4-pipe FCU systems?
Yes, it is designed for 4-pipe systems with separate heating and cooling control.
Q2. Can it be controlled remotely?
Yes, the WiFi Thermostat supports remote control through mobile application connection.
Q3. Does it support BMS integration?
No, this model is standalone 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 provide 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 other versions, you can contact us for project support and selection. Or you can refer to below links:
The WiFi Thermostat supports 4-pipe FCU systems with remote control. It improves flexibility. It helps maintain stable temperature and reliable system performance. 【More models: fan coil thermostat】
