Quick Summary
The HTW-WF11-FC-4ENS1 is a thermostat designed for 2/4-pipe FCU systems with 3-speed fan and on/off valve control. It supports Modbus communication and dual sensor operation for precise temperature management.
This page provides an overview of control logic, practical functions, wiring diagrams, key parameters, model code guide, possible customisation, and typical project questions.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) 3-speed fan and 2/4-pipe on/off valve control
This model controls a 3-speed fan together with on/off valves in the FCU system. It supports both 2-pipe and 4-pipe heating and cooling setups. The thermostat adjusts fan speed and valve operation to keep room temperature stable and comfortable.
If BACnet is preferred instead of Modbus, please refer to the model (HTW-WF11-EB), which also supports on/off valve control and an external sensor.
(02) External sensor function
Using an external sensor improves measurement accuracy across the room. It allows flexible placement, helping the system respond quickly to environmental changes and maintaining consistent comfort.
(03) RS485 Modbus group control
Modbus integration enables multiple thermostats to be managed centrally. This simplifies installation, reduces wiring complexity, and improves monitoring and maintenance in large-scale projects.
(04) Cooling/Heating Auto Change
Automatically switches between heating and cooling based on the room temperature compared with the setpoint. This prevents manual errors, saves energy, and ensures year-round comfort.
(05) Time Display
The built-in clock displays current time clearly. It supports scheduling, improves operational convenience, and provides reference for timing-dependent settings.
Display
(This section shows the product’s dimensions and the interface layout.)
Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| 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 |
| Warranty | 2 Year |
| Installation Box | EU round box or Standard 86x86mm Box |
Wiring
(This section provides the wiring reference diagram for correct installation.)
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 = 4ENS, it stands for a 3-speed fan, 4-pipe system with on/off valve control, external sensor function, and Modbus 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.)
This model supports Modbus communication and can be integrated into centralised BMS systems. It is not suitable for projects requiring only Wi-Fi cloud control or non-Modbus protocols without proper converters.
Despite these limits, the thermostat supports ODM customisation. Functional settings, firmware options, and interface features can be tailored to meet project-specific needs, ensuring smooth integration and reliable operation.
OEM customisation is also available. Logo printing, colour changes, and labelling can be applied to match project branding, regional requirements, or design preferences.
Certifications
Exhibition Moments
Frequently Asked Questions
Q1: Is this thermostat compatible with all 4-pipe FCU systems?
It supports standard 4-pipe on/off systems; ensure fan and valve ratings match the specifications for safe operation.
Q2: Can I use both built-in and external sensors simultaneously?
Yes, dual sensor operation improves temperature accuracy and allows faster response to room changes.
Q3: How does Modbus integration work in large installations?
RS485 Modbus enables centralised control and monitoring of multiple thermostats, simplifying management for larger buildings.
Q4: What is the minimum order quantity and sample availability?
Samples are available; standard MOQ is 300. Smaller quantities can be discussed depending on project needs.
Q5: How do I place an order?
Contact us to confirm requirements. A proforma invoice will be issued. Payment supports TT, Paypal, Visa, etc; terms include EXW, FOB, DAP and more.
Q6: How is shipping handled?
Courier delivery is recommended, taking about 7 days. Air shipping also takes 7 days; sea shipping typically requires over 30 days.
Need Support?
For project guidance or application assistance, please contact us. We can advise on integration, deployment, and any customisation requirements.
