Quick Summary
The HTW-EB-FC-FC-4 Smart Thermostat is designed for 4-pipe fan coil systems where heating and cooling are controlled independently. It manages a 3-speed fan and two motorised valves for separate circuits. The smart Thermostat provides stable temperature control with clear display and reliable operation.
This page explains how the smart Thermostat works in FCU systems and its practical value in daily operation. It includes wiring reference, technical parameters, and model code explanation, followed by project fit guidance, customisation options, and common questions for quick understanding.
Key Features
(This section explains the core control functions and their practical value.)
(01) Independent heating and cooling control
The smart Thermostat supports 4-pipe systems with separate heating and cooling circuits. This improves flexibility and ensures stable indoor comfort in projects with varying thermal demands. If you prefer thermostat for 2-pipe system, you can refer to this link: HTW-EB-FC-2.
(02) Reliable on/off valve control
The smart Thermostat uses standard on/off logic for valve control. This ensures compatibility with common FCU systems and simplifies installation and maintenance.
(03) 3-speed fan management
The smart Thermostat allows selection of three fan speeds. This helps adjust airflow easily and maintains comfort while keeping system operation stable and quiet.
(04) Clear interface with backlight
The smart Thermostat features a negative black backlight display. This improves readability 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 | 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-WF11-FC-xx: if xx = 4, it stands for a 4-pipe system with on/off valve control. 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 smart Thermostat is suitable for 4-pipe FCU systems where separate heating and cooling control is required. It is not suitable for projects needing Modbus or BACnet communication integration.
Despite these limits mentioned above, ODM customisation can be discussed. Functions such as control logic or interface design may be adjusted based on project requirements and technical evaluation.
OEM customisation is also supported. Options include logo printing, housing colour changes, and label design. This helps align the thermostat with project standards and branding needs.
Certificates and Compliance
Frequently Asked Questions
Q1. Is this thermostat suitable for 4-pipe systems?
Yes, it is designed for 4-pipe FCU systems with separate heating and cooling control.
Q2. Can it control both valves at the same time?
It controls heating and cooling valves separately based on system demand and temperature settings.
Q3. Does it support remote or BMS control?
No, this smart Thermostat works as a standalone device without communication protocols.
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 selection support. You can refer to below links as well:
The smart Thermostat is suitable for 4-pipe FCU systems with independent control. It supports stable operation. It helps maintain consistent temperature and system reliability. 【More models: fan coil thermostat】
