Quick Summary
HTW-WF11-ECNW is an EC fan coil remote thermostat designed for FCU HVAC systems in hotels. It supports EC fan control, heating and cooling via 2/4 pipe valve logic. It is suitable for projects requiring both BMS communication (RS485 Modbus) and WiFi-based smart control.
This page explains its control logic, wiring, parameters, and project adaptability in a clear engineering structure for real installation use.
Key Functional Highlights
(These functions explain the main control behaviours and engineering value of HTW-WF11-ECNW in EC fan coil systems, especially when WiFi is used for flexible HVAC management.)
(1) EC Fan Control Stability
It provides stable EC fan speed control for FCU systems. Airflow adjustment follows room temperature demand for consistent comfort. This reduces sudden temperature changes during operation. WiFi access allows optional remote adjustment in smart building setups.
(2) 2/4 Pipe On/Off Valve Control
The system supports configurable 2-pipe and 4-pipe valve operation. It ensures correct switching between heating and cooling modes. This improves installation flexibility across different HVAC designs. Control behaviour remains stable under variable load conditions.
(3) Hotel Keycard and External Sensor Input
It supports hotel energy-saving logic via keycard input and external sensor. Room occupancy detection helps reduce unnecessary HVAC operation. This is widely used in hotel room management systems. Combined logic improves energy efficiency in daily use.
(4) RS485 Modbus Communication
Modbus communication allows integration with building management systems. It supports central monitoring and parameter adjustment. This improves coordination between multiple FCU units.
(5) WiFi App Control and Programming
WiFi enables mobile app control and scheduling functions. Users can adjust temperature and timing remotely. This improves flexibility in multi-room environments.
If one is also interested in a humidity display feature, one may refer to this model instead (please click → HTW-FC08-ECNW).
Product Design and Display
(This section shows appearance, interface, and installation dimensions of this HTW-WF11-ECNW model, including WiFi-enabled interface indicators and FCU wall installation design.)
Technical Specifications
(This section lists key electrical and control parameters of HTW-WF11-ECNW relevant to EC fan coil systems and WiFi-enabled HVAC applications.)
| Power Supply | 100~240Vac, 50/60Hz |
| Current Load | Valve Relay 5A |
| Built-in Sensor | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Protection Class | IP20 |
| Warranty | 2 Year |
Wiring Diagram
(This section provides the wiring diagram for EC fan coil, valve control, Modbus communication, and WiFi-enabled installation in HVAC systems.)
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 | WiFi |
| N/B | N for Modbus; B for BACnet |
| K/E | K for Keycard; E for External sensor |
| 24 | 24V power or 24V output support |
| 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 system suitability, limitations, and customization options for EC fan coil control solutions with WiFi and Modbus functions.)
This model is not suitable for systems without FCU wiring or direct EC fan coil structure. It may not fit fully cloud-dependent automation systems without local control logic. Weak network environments may limit WiFi performance. High industrial environments with extreme electrical noise are also not recommended.
Despite these limitations, we can support ODM customization based on project needs. Control logic, Modbus settings, and WiFi behaviour can be adjusted. External sensor response and fan control strategy can also be discussed. Customisation is project-based and not unlimited.
We also provide OEM services such as logo printing, casing colour, and label design. Packaging and interface language adjustments are available for different markets. This helps align the product with branding and project requirements.
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 system work with all EC fan coil units?
It supports most standard EC fan coil systems with compatible control signals. Wiring confirmation is recommended before installation. WiFi performance depends on network conditions.
Q2: Does WiFi require internet connection?
Local app control can work within the same network. Cloud access depends on project setup. Stable WiFi improves performance.
Q3: Can it connect to BMS systems?
Yes, via RS485 Modbus communication. It supports central monitoring and basic control functions. Integration depends on system design.
Q4: Is an external sensor required?
It is optional depending on project accuracy requirements. It helps improve temperature detection in some installations. The system can also operate without it.
Q5: What is the MOQ and sample availability?
We support samples for testing. MOQ is usually around 300 units. Smaller trial orders such as 100 units can be discussed.
Q6: How do we place an order?
Please feel free to get in touch with us. We will issue a PI after confirmation. Payment options include TT, PayPal, and Visa.
Q7: What is the production time?
Standard samples ship within 7 days. Custom functions require 3–5 weeks. Bulk orders around 300 units take about one month.
Q8: What shipping methods are available?
DHL, FedEx, and UPS are recommended for fast delivery. Air and sea freight are also available. Delivery time depends on method.
Need Help Choosing the Right Model?
If you need help selecting configuration, please feel free to get in touch with us. We can support project-based selection and system matching.
Related Thermostat Models
For more details, please click here directly: Wi-Fi Thermostats | Modbus Thermostats | BACnet Thermostats
Final Note
Modern FCU systems require stable local control and flexible communication. This unit manages EC fan coil operation with reliable switching and system coordination. It supports both wired and WiFi-based control for daily HVAC use. It helps improve comfort stability, system coordination, and overall building operation efficiency.
