Quick Summary
This HTW-WF11-2PNW digital room thermostat is designed for fan coil unit systems. It controls a 3-speed fan and on/off valves. It supports both 2-pipe and 4-pipe configurations. Heating and cooling are managed with stable switching logic. Wi-Fi feature enables remote control and scheduling. RS485 Modbus supports basic integration in building systems.
This page explains how the digital room thermostat works in real projects. It covers control logic, wiring ideas, and parameter confirmation. It also highlights typical use cases and limits. We also outline how tuya functions and Modbus options can be used together. Customisation options are also explained for project matching.
Key Functional Highlights
(This section introduces the main control functions and their engineering value in the HVAC system using a digital room thermostat with tuya.)
(01) 3-Speed Fan Control
This digital room thermostat supports low, medium, and high fan speeds. It allows flexible airflow adjustment in different room conditions. This improves comfort and reduces energy waste. It also helps facility teams manage noise and airflow balance.
If one is looking for EC Fan Control, one may refer to this model instead (please click → HTW-FC08-ECNW).
(02) 2/4 Pipe Valve Control
The thermostat can be configured for 2-pipe or 4-pipe systems. It switches heating and cooling valves based on demand. This avoids incorrect operation during seasonal changes. It improves system reliability in mixed-use buildings.
(03) 2-Stage Cooling Logic
The digital room thermostat activates a second cooling stage when demand increases. Stage two starts after a delay from stage one. This prevents sudden load changes in the system. It helps protect valves and improve cooling stability.
(04) RS485 Modbus Communication
This model supports RS485 Modbus for basic system integration. It allows central monitoring of temperature and status. It is suitable for projects requiring simple BMS connection. This improves visibility for facility management.
(05) Wi-Fi Control via Tuya
The tuya platform enables app-based control and scheduling. Users can adjust temperature remotely and set programs. This improves user convenience and energy control. It is suitable for residential or light commercial projects.
Product Design and Display
(This section shows the thermostat appearance, screen interface, and installation dimensions of this digital room thermostat with tuya.)
Technical Specifications
(This section lists the key technical parameters relevant to this digital room thermostat with tuya.)
| Parameter | Value |
|---|---|
| Power Supply | 100~240Vac, 50/60Hz |
| Current Load | Fan Relay 5A; Valve Relay 5A |
| Sensor | NTC3950, 10K |
| Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Protection | IP20 |
| Warranty | 2 Year |
| Installation | EU round box or 86×86 mm |
Wiring Diagram
(This section provides the wiring diagram for this digital room thermostat with tuya in a fan coil 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 customization options for this digital room thermostat with tuya.)
This digital room thermostat is not suitable for high-level BMS integration projects. It does not support BACnet or complex control logic. It is also not designed for modulating valves. Projects needing advanced sequencing should consider other models.
Despite these limits, we can support function customisation. We can adjust communication options or control logic if needed. Tuya functions can also be adapted for specific applications. Final feasibility depends on project details and quantity.
OEM options are also available for this digital room thermostat. We can support logo printing and label design. Colour changes may also be possible. Please feel free to get in touch with us to discuss.
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: Can this digital room thermostat work with both 2-pipe and 4-pipe systems?
Yes, it can be configured for both systems. The installer selects the mode during setup. This allows flexible use in different projects.
Q2: Does the tuya function replace Modbus communication?
No, they serve different purposes. Tuya is for app control and user interaction. Modbus is for system monitoring and integration.
Q3: How does the 2-stage cooling work in this thermostat?
The second stage activates after a delay. It starts when cooling demand continues. This avoids sudden load changes and improves stability.
Q4: Can I connect an external sensor to this model?
This version does not include external sensor input. For that requirement, another variant should be selected. Please confirm before ordering.
Q5: What is the MOQ and do you support samples?
We support samples for testing. MOQ is usually 300 units. Smaller trial orders like 100 units can be discussed.
Q6: How do we place an order and arrange shipment?
We confirm requirements and issue a PI. Payment supports TT, PayPal, and Visa. Terms include EXW, FOB, and DAP.
Q7: How long does production take?
Standard samples ship within 7 days. Customisation usually takes 3–5 weeks. Bulk orders like 300 units take around one month.
Q8: What shipping methods are available?
Courier delivery takes about 7 days. Air freight is similar in timing. Sea shipping takes about one month or more.
Need Help Choosing the Right Model?
If you are unsure which digital room thermostat fits your project, please feel free to get in touch with us. We are happy to review your application and suggest suitable options.
Related Thermostat Models
For more details, please click here directly: Wi-Fi Thermostats | Modbus Thermostats | BACnet Thermostats
Final Note
In HVAC projects, stable control and easy management are key goals. This digital room thermostat manages fan coil operation and valve switching. With tuya and Modbus, it supports both user control and basic monitoring.
