Quick Summary
HTW-WF06-FC-4 is a standalone thermostat designed for 4-pipe fan coil units. It controls multi-speed fan operation and two motorized valves, allowing independent heating and cooling control at room level.
It supports programmable schedules for hotels, apartments, offices, and commercial buildings. The thermostat works with 110–230VAC and fits standard wall boxes. This page explains control logic, wiring reference, technical parameters, project limits, and OEM/ODM options.
Key Features
(This section explains the core control functions and their practical value.)
(01) 4-Pipe Heating and Cooling Logic
This standalone thermostat separates heating and cooling valve outputs, allowing independent control of both water circuits. It suits projects requiring seasonal flexibility without central switching.(2 Pipe System click here)
(02) Fan and Dual Valve Relay Control
The device manages fan relay and two motorized valves. Clear relay logic simplifies wiring checks and improves commissioning stability during installation.
(03) Programmable Operation Schedule
Programmable time settings reduce unnecessary runtime in office or hotel environments. This improves operational efficiency without external control systems.
(04) Negative Black Backlight Display
The negative black backlight improves readability under indoor lighting. It provides clear temperature feedback and system status during operation.
Product Design and Display
(Product’s dimensions and the interface layout for reference.)
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 |
| Display Range | 5–99°C |
| Installation | EU or Standard Electric Box |
| Protection Class | IP20 |
| Storage Temperature | -5–45°C |
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
| 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 = 4, it means 4-pipe system with standalone control. |
Project Fit & Customization
(This section explains where the product can be used, its limits, and OEM/ODM options.)
This standalone thermostat is designed for indoor 4-pipe fan coil systems with decentralized control. It is not suitable for projects requiring BMS communication such as Modbus or BACnet. It is also not intended for outdoor or high humidity environments.
ODM customization can be discussed. Adjustments may include scheduling logic, display behavior, or control timing according to project needs.
OEM customization is supported, including logo printing, panel color, and packaging changes for branding requirements.
Certifications and Compliance
Exhibition Moments
Frequently Asked Questions
Is this thermostat suitable for 4 pipe FCU systems?
Yes. It independently controls heating and cooling valves and manages fan operation for stable room temperature.
Can it control both fan and valves?
Yes. It provides relay outputs for fan speed and two motorized valves.
Does it require a central controller?
No. It operates independently without BMS or external communication.
What is the MOQ and are samples available?
Samples are available. Standard MOQ is 300 units. 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 is shipment arranged?
Courier delivery takes about 7 days. Air freight is similar. Sea shipping usually takes over one month.
Need Support?
If you need help selecting a thermostat for your project, please contact us. Our team can assist with wiring and system matching.
