Quick Summary
HTW-FT03-2W is a Tuya WiFi Thermostat designed for 2-pipe fan coil systems in heating and cooling applications. It controls a 3-speed fan and two on/off motorised valves. The unit operates on 95–240Vac and supports WiFi communication for remote control. It is intended for standard FCU installations in residential or light commercial indoor spaces.
This page explains the control logic, wiring reference, key parameters and model code meaning. It also outlines installation considerations, project fit judgement and typical deployment questions.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) Stable 2-Pipe Heating and Cooling Control
The Tuya WiFi Thermostat manages a 2-pipe FCU system with clear heating and cooling switching logic. It ensures proper coordination between fan output and valve actuation, reducing misoperation and improving room stability during seasonal changeover.
(02) 3-Speed Fan Relay Output
Three fan speed relays allow precise airflow adjustment according to load demand. This improves comfort control in variable occupancy rooms and reduces unnecessary fan operation, supporting energy management in daily building use.
(03) Dual Valve On/Off Control
Two wired valve outputs allow separate heat and cool motorised valve management. This ensures correct water flow control and prevents simultaneous actuation, improving long-term reliability of the hydraulic system.
(04) Integrated WiFi Communication (Tuya Platform)
As a Tuya WiFi Thermostat, this model enables remote monitoring and temperature adjustment through the Tuya ecosystem. It is suitable for small projects where simple cloud-based management is preferred over BMS integration.
Display
(This section shows the product’s dimensions and the interface layout.)
The front panel presents a clear digital temperature display with simple operating icons. The housing fits EU or standard electrical wall boxes. The structure is compact and suitable for indoor dry areas.
Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 95–240Vac |
| Frequency | 50/60Hz |
| Fan Relay Load | 5A (3A inductive) |
| Valve Relay Load | 3A (1A inductive) |
| Accuracy | ±0.5°C or ±1°F |
| Setpoint Range | 5–35°C |
| Installation | EU or standard electric box |
| Protection Class | IP20 |
Wiring
(This section provides the wiring reference diagram for correct installation.)
The wiring layout includes terminals for power input, three fan outputs and two valve outputs. Correct separation of fan and valve circuits must be ensured during 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 = 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 & Customisation
(This section explains where the product can be used, its limits, and OEM/ODM options.)
This Tuya WiFi Thermostat is designed for standard 2-pipe FCU systems with on/off valves. It is not suitable for modulating valve control or 0–10V EC fan output. It is also not intended for direct BMS integration through Modbus or BACnet. Projects requiring central protocol supervision should select a communication-ready model instead.
Despite these limits mentioned above, ODM functional adjustments can be discussed according to project demand. Control logic, firmware behaviour or sensor configuration may be evaluated subject to technical feasibility and quantity.
OEM support is available for logo printing, colour customisation (white or black), packaging and product labelling. Artwork confirmation is required before production.
Certifications
Exhibition Moments
Frequently Asked Questions
Q1. Is this thermostat suitable for 4-pipe FCU systems?
No. HTW-FT03-2W is designed only for 2-pipe systems with on/off valve control. For 4-pipe projects, you could refer to 4-pipe model HTW-FT03-4W.
Q2. Can it be connected to a BMS system?
This is a Tuya WiFi Thermostat and does not support Modbus or BACnet. It is intended for cloud-based WiFi control instead of direct BMS integration.
Q3. What should be checked before installation?
Confirm power supply range, relay load compatibility and valve type. Ensure installation is indoor and wiring follows the provided diagram.
Q4. What is the MOQ and are samples available?
For this Tuya WiFi Thermostat, samples are supported. Standard MOQ is 300 units. Smaller trial quantities can be discussed based on project conditions.
Q5. How can we place an order?
Please contact us with your requirement. After confirmation, we issue a proforma invoice. Payment supports TT, PayPal, Visa. Terms include EXW, FOB, DAP and more.
Q6. How is the product shipped?
Courier door-to-door is normally recommended and takes about 7 days. Air freight is similar. Sea freight takes over one month, depending on destination.
Need Project Support?
If you are selecting a Tuya WiFi Thermostat for a 2-pipe FCU project, please contact us for technical confirmation and model selection support.
