Quick Summary
HTW-WF01-FC-DX is a DX thermostat made for direct expansion systems. It controls a 3-speed fan and one compressor output. It works in cooling-only projects with 24Vac or 220Vac power. It also supports programmable temperature control for daily room management.
This page explains how the controller works in real projects. It covers function value, control logic, and key technical points. We also answer common project questions and selection concerns. Custom project discussion is available when standard functions are not enough.
Key Functional Highlights
(This section introduces the main control functions and engineering value of this DX thermostat in direct expansion FCU cooling systems.)
(01) 24V or 220Vac power supply
This DX thermostat is available with a 24V or 220V power supply, giving more flexibility for project planning and replacement. It helps installers match different site power conditions and reduces selection mistakes.
(02) 3-speed fan and compressor control
This control layout supports stable room cooling in daily FCU use. The hvac thermostat manages fan speed and compressor action in one device. This helps simplify wall control and supports cleaner field wiring.
(03) Compressor delay output
The delay function helps protect the compressor during repeated start and stop cycles. It lowers the risk of short cycling in unstable room conditions. This can improve system reliability and support longer service life.
(04) Cooling-only control
This HVAC thermostat is suitable for projects that only need cooling operation. It avoids extra heating logic that may not be needed on site. This makes setup clearer for many direct cooling room applications.
(05) Programmable function
Programmable control helps adjust the room temperature by time period. This DX thermostat can support better energy use during working and non-working hours. It is useful where comfort and simple scheduling are both important.
Product Design and Display
(This section shows the appearance, screen interface, and installation size of this hvac thermostat for wall-mounted FCU use.)
Technical Specifications
(This section lists the key technical parameters relevant to this DX thermostat model for cooling control projects.)
| Parameter | Value |
|---|---|
| Power Supply | 24Vac or 220Vac, 50/60Hz |
| Current Load | Fan Relay 5A; Compressor Relay 5A |
| Built-in Sensor | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Protection Class | IP20 |
| Warranty | 2 Year |
| Installation Box | EU round box or Standard 86x86mm Box |
Wiring Diagram
(This section provides the wiring diagram for this HVAC thermostat in a direct expansion FCU cooling control system.)
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 |
| 24 | Powered by 24V, or with 24V output for 0-10V valve |
| Example HTW-WF11-FC-xx: if xx = 2EN, it stands for a 3-speed fan, 2-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 describes project suitability, system limitations, and available customization options for this DX thermostat.)
This model is not suitable for heating and cooling changeover projects. It is also not made for valve control or BMS communication. It does not support app control, remote cloud access, or complex central supervision.
Despite these limits, we can discuss ODM changes based on project needs. For example, some interface, logic, or control details may be adjusted after evaluation. The hvac thermostat platform may also be reviewed for communication or function expansion.
OEM support is also available for branding work. We can discuss logo printing, label changes, and colour customisation. Some packaging and front panel details may also be adjusted for project orders.
Certificates and Compliance
(This thermostat complies with European market requirements and is supported by certifications such as CE, RoHS, LVD test reports, EMC test reports, etc)
Exhibition Moments
(Our team regularly participates in international HVAC exhibitions such as Febrava in Brazil, The Big 5 in Dubai, and ISK-SODEX in Turkey, etc.)
Frequently Asked Questions
Q1. Is HTW-WF01-FC-DX suitable for all fan coil projects?
No. It is mainly for direct expansion cooling systems. It does not suit water valve control or heat pump applications.
Q2. Does this model support external communication with a BMS?
No, this standard model is for local room control. If a project needs communication, please feel free to get in touch with us. We can discuss possible custom options.
Q3. How does the temperature sensor work in daily use?
The built-in sensor reads room temperature for control action. It helps the DX thermostat keep the cooling response stable. Good installation position is important for better sensing.
Q4. Why is compressor delay important in a cooling project?
It helps prevent frequent compressor restarts. This supports safer operation and reduces stress on the system. It is useful in rooms with changing load conditions.
Q5. Do you support samples and what is the MOQ?
Yes, we support samples for testing. Our usual MOQ is 300 units. Smaller trial orders, such as 100 units, can also be discussed.
Q6. How do we place an order and arrange shipment?
Please share your requirements with us first. We will then provide a PI for confirmation. We support TT, PayPal, Visa, and terms such as EXW, FOB, and DAP.
Q7. How long does it take to prepare the products?
Standard samples are usually sent within 7 days. Custom projects need evaluation and program adjustment first. This usually takes 3 to 5 weeks. A batch order of 300 units often needs around one month.
Q8. How are the products usually shipped?
Courier delivery is often the most practical choice. FedEx, DHL, and UPS usually take about 7 days door to door. Air freight is also about 7 days, while sea freight usually takes one month or more.
Need Help Choosing the Right Model?
If you are comparing room controllers for a cooling project, please feel free to get in touch with us. We are glad to discuss your application and help with model selection.
Related Thermostat Models
For more details, please click here directly: Wi-Fi Thermostats | Modbus Thermostats | BACnet Thermostats
Final Note
FCU cooling projects often need stable room control and simple daily operation. This model manages fan coil cooling through local fan and compressor control. It helps support steady performance, easier maintenance, and more practical facility management.
