Quick Summary
The HTW-FT03-FC-4 OEM 4 pipe Room thermostat is designed for 4-pipe fan coil systems. It controls the fan coil unit and two wired motorized valves, supporting heating and cooling modes. Power supply is 100–250VAC, 50/60Hz. The device ensures accurate temperature control with ±0.5°C precision, using a reliable NTC3950 sensor.
This page provides explanations of the product’s purpose, wiring diagrams, technical specifications, project customisation options, and answers to common questions. Readers can navigate installation and operation guidance efficiently.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) Fan and Valve Control
This OEM 4 pipe Room thermostat precisely manages the fan coil speed and two motorized valves. Stable temperature control is achieved in 4-pipe systems, reducing energy waste. We have another model HTW-FT03-FC-2 which can support 2 pipe system.
(02) Heating and Cooling Modes
Supports both heating and cooling independently. The control logic ensures smooth switching, avoiding abrupt room temperature changes.
(03) Temperature Accuracy
With ±0.5°C or ±1°F accuracy, the thermostat maintains desired room conditions reliably, supporting sensitive environments like offices or hotel rooms.
(04) External Sensor Option
Supports external NTC sensors for flexible placement. Useful for large rooms where wall-mounted sensors alone may not accurately reflect ambient temperature.
Display
(This section shows the product’s dimensions and the interface layout.)
Front, side, and rear views display a clean interface. Screen shows current temperature and system mode. Buttons allow simple fan speed and setpoint adjustment.
Dimensions: EU standard electric box installation. Housing material PC + ABS, fireproof. IP20 protection class.
[Product Front/Side/Back]
[Dimensions and Screen Display]
Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 95–240 VAC |
| Frequency | 50/60 Hz |
| Current Load | Fan Relay 5A (3A inductive), Valve Relay 3A (1A inductive) |
| Accuracy | ±0.5°C / ±1°F |
| Sensor | NTC3950, 10K |
| Storage Temp. | -5~45°C |
| Setpoint Range | 5~35°C |
| Display Range | 5~99°C |
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 |
| 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 = 2EN, it stands for a 3-speed fan, 2-pipe system with on/off valve, external sensor, and Modbus. Contact us for availability. |
Project Fit & Customization
(This section explains where the product can be used, its limits, and OEM/ODM options.)
The HTW-FT03-FC-4 OEM 4 pipe Room thermostat is not suitable for systems requiring full BMS integration in standalone configuration. It cannot directly interface with complex building automation protocols without Modbus or BACnet support.
Despite these limits, this OEM 4 pipe Room thermostat can support ODM functions customisation. Adjustments for system logic, sensor calibration, or communication protocols can be discussed case by case.
OEM options are available, including logo printing, colour selection, and custom labelling. This ensures the OEM 4 pipe Room thermostat fits project requirements without compromising safety or performance.
Certifications
Exhibition Moments
Frequently Asked Questions
Q1: Which FCU systems are compatible?
It works with 4-pipe fan coil units controlling two motorized valves, heating and cooling.
Q2: Can I install it with an external sensor?
Yes. External NTC sensor improves temperature accuracy in larger rooms.
Q3: Is it suitable for BMS integration?
Only models with Modbus/BACnet support can integrate with BMS. Standalone units cannot connect.
Q4: What is the minimum order quantity and sample availability?
Samples are supported. Standard MOQ is 300 units, smaller quantities can be discussed.
Q5: How can I place an order?
Please contact us. We issue a proforma invoice; payment via TT, Paypal, Visa. Terms EXW, FOB, DAP.
Q6: How is shipping handled?
We recommend courier to door (~7 days). Air freight also ~7 days, sea freight ~1 month+, depending on location.
Need Project Support?
For assistance with applications or project integration, please contact us. Our team can provide technical guidance and advice for your system setup.
