Quick Summary
HTW-WF06-FC-4MN is a 24V Modbus thermostat designed for 4-pipe fan coil systems. It controls multi-speed fan operation and modulating heating and cooling valves. The device supports programmable scheduling, Modbus communication, and energy saving logic for stable HVAC control.
This page explains how this 24V Modbus thermostat works in practical projects. It covers control logic, wiring reference, technical parameters, and model code meaning. Project limits and customization options are also included for engineering confirmation.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) Programmable Operation
This 24V Modbus thermostat supports time-based temperature control. It helps reduce unnecessary runtime and improves energy planning in commercial HVAC systems.
(02) Modbus Communication Integration
RS485 Modbus communication enables connection to building management systems. It supports central monitoring and remote adjustment across multiple zones.(If you need 230V version, click here)
(03) Energy Saving Mode
Energy saving mode reduces system activity during low occupancy periods. It helps lower operating costs while maintaining safe indoor temperature limits.
(04) Modulating Valve and Fan Control
The thermostat supports modulating valve control for both heating and cooling. It provides smoother temperature regulation and reduces mechanical stress compared to on/off systems.
Product Design and Display
(This section shows the product’s dimensions and interface layout.)
The thermostat appearance and interface layout to fully grasp the display effect and performance of the thermostat in real-world use
Technical Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 110(+/-10%)VAC or 220(+10%,-15%)VAC |
| Frequency | 50/60Hz |
| Accuracy | ±0.5°C or ±1°F |
| Fan Relay Load | 5A (3A inductive) |
| Valve Relay Load | 3A (1A inductive) |
| Setpoint Range | 5–35°C |
| Installation | EU or Standard Electric Box |
| Protection Class | IP20 |
Wiring Diagram
(This section provides the wiring reference diagram for correct installation.)
Clear wiring references to help you complete the installation quickly and correctly
Model Code Guide
(This section explains what configuration the model code refers to.)
| Fan coil series | xx stands for |
|---|---|
| 2/4 | 2 for 2-pipe; 4 for 4-pipe system |
| M | Modulating valve control |
| W | Wi-Fi |
| N/B | N for Modbus; B for BACnet |
| K/E | Keycard or external sensor |
| Example HTW-WF06-FC-xx | If xx = 4MN, it means 24V, 4-pipe system with modulating valve control and Modbus communication. |
Project Fit & Customization
(This section explains where the product can be used, its limits, and OEM/ODM options.)
This 24V Modbus thermostat is suitable for indoor 4-pipe fan coil systems using modulating valves. It is not suitable for high-current equipment control or outdoor installation. Systems requiring BACnet should select other versions.
Despite these limits mentioned above, ODM customization can be discussed. Communication settings, control logic, or interface behaviour may be adjusted according to project requirements.
OEM customization is also supported. Logo printing, panel colour, packaging, and labels can be modified to meet branding needs.
Certifications and Compliance
Exhibition Moments
Frequently Asked Questions
Can this thermostat be integrated into a BMS system?
Yes. It supports Modbus communication for integration with building management systems.
Is it suitable for 2-pipe systems?
No. This model is designed for 4-pipe systems only.
Does it support modulating valve control?
Yes. It supports modulating heating and cooling valves for stable temperature control.
What is the minimum order quantity?
Standard MOQ is 300 units. Samples are available and smaller quantities may be discussed.
How can I place an order?
Please contact us to confirm requirements. We provide PI. Payment supports TT, PayPal, Visa with EXW, FOB, DAP terms.
How are products shipped?
Courier delivery takes about 7 days. Air freight is similar. Sea shipping usually takes over one month.
Need Support?
If you are selecting a 24V Modbus thermostat for a project, please contact us. We can assist with wiring and system matching.
