Quick Summary
HTW-FC08-ECNW is an EC fan thermostat designed for fan coil unit systems. It controls a 0–10V EC fan and on/off valves. The thermostat supports both 2-pipe and 4-pipe FCU systems. It manages heating and cooling operations based on the measured room temperature. It also supports external sensors, hotel keycard input, and RS485 Modbus with Wi-Fi communication.
This page explains the control logic, wiring reference, and technical parameters. It also covers common project questions and possible customisation options.
Key Functional Highlights
(This section explains the core control functions and their practical value.)
(01) 0–10V EC fan control
This Wi-Fi EC fan thermostat controls EC fan speed using a 0–10V signal. It allows smooth airflow adjustment and reduces noise. Stable EC fan control improves comfort and helps reduce energy use in FCU rooms.
(02) 2/4-pipe valve control
The EC fan thermostat supports both 2-pipe and 4-pipe FCU valve control. It switches heating or cooling circuits based on system demand. This allows one controller model to suit different FCU project layouts. It also simplifies model selection during project design and installation planning.
(03) Keycard energy control
Keycard input supports hotel room energy management logic. When the card is removed, the thermostat can limit operation. This helps reduce unnecessary running time and improves energy efficiency in hotel projects. It also helps maintain basic room conditions while reducing energy waste.
(04) External sensor support
An external sensor can measure temperature from another location. This avoids errors caused by wall temperature or airflow. It improves control stability when the EC fan thermostat is installed in complex room layouts.
(05) RS485 Modbus + Wi-Fi communication
The EC fan thermostat supports both RS485 Modbus and Wi-Fi communication. Modbus communication is often used in BMS integration for hotels or office buildings. Wi-Fi allows mobile control and convenient configuration during installation or daily use. It allows easier adjustment without accessing the thermostat directly.
If the Wi-Fi feature is not required, one may refer to this Modbus EC fan thermostat instead (HTW-WF11-ECNS).
(05) Humidity display
The thermostat shows the current room humidity on the screen. This helps users understand indoor air conditions more clearly. Visible humidity information supports better comfort control and helps facility staff monitor room environment stability.
(06) Automatic Heating and Cooling Changeover
The thermostat automatically switches between heating and cooling based on the set-point and room temperature. This function works for both 2-pipe and 4-pipe fan coil systems. It helps maintain stable comfort and reduces manual adjustment.
Display
(This section shows the product’s dimensions and the interface layout.)
Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 95–240 VAC, 50/60Hz |
| Fan Control and Valve Output | EC fan DC 0–10V; Relay output, 5A |
| Built-in Sensor | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C or ±1℉ |
| Set-Point Range | 5–35°C |
| Warranty | 2 years |
| Installation Box | EU round box or 86×86 mm box |
Wiring
(This section provides the wiring reference diagram for correct installation.)
Project Fit & Customisation
(This section explains where the product can be used, its limits, and OEM/ODM options.)
This EC fan thermostat is designed for 0-10V EC fan control rather than 3-speed AC fan motors. It is not suitable for projects that require 0-10V valve control. Projects requiring simple standalone thermostats without communication functions may also find the connectivity features unnecessary.
Despite the limits mentioned above, some functions can still be adjusted for specific projects. Small changes in control logic or interface settings may be possible. For example, other communication protocols such as BACnet may be discussed. Sensor options or wiring logic may also be adapted if required. Final feasibility depends on technical review and project quantity.
OEM options are also available for brand-related requirements. These may include logo printing, panel colour adjustments, packaging design, or product labels. OEM branding normally follows agreed order quantities and production planning.
Certifications
Exhibition Moments
Frequently Asked Questions
1. Can this EC fan thermostat work with both 2-pipe and 4-pipe FCU systems?
Yes. The thermostat supports both system types. The valve wiring and system configuration determine whether the controller runs in 2-pipe or 4-pipe mode.
2. How does the thermostat communicate with a building management system?
This WiFi EC fan thermostat supports RS485 communication using the Modbus protocol. It can exchange status data and control commands with a compatible BMS.
3. When should an external sensor be used with the EC fan thermostat?
An external sensor is helpful when the wall temperature does not represent the room conditions. It improves temperature measurement accuracy in large rooms or areas with uneven airflow.
4. How should I choose the correct model for a project?
Model selection depends on fan type, pipe system, and communication requirements. Sensor options, keycard input, or network functions should also be considered.
5. How should the thermostat be installed?
Embedded wall installation is normally recommended. It fits a standard 86×86 mm wall box or a European round wall box. If the project has no wall box openings, a surface mounting box can be provided for flat installation.
6. What is the minimum order quantity, and are samples available?
Samples are available for testing and evaluation. The typical minimum order quantity is 300 units, though smaller trial quantities like 100 units may be discussed for project evaluation.
7. How can I place an order and arrange shipment terms?
Please contact us to confirm model and configuration requirements. We will provide a proforma invoice after confirmation. Payment methods include TT, PayPal, Visa, and similar options.
8. How long does it take to prepare the products?
Standard samples without customisation are usually sent within 7 days. If custom functions are needed, we will assess the quantity and required features. Program changes and evaluation usually take 3 to 5 weeks. For bulk orders such as 300 units, preparation usually takes about one month.
9. What shipping methods are normally used?
Courier delivery such as DHL, FedEx, or UPS is commonly recommended. Delivery usually takes around seven days to most destinations. Air freight or sea freight may also be arranged depending on project needs.
Need Support?
If you are evaluating this EC fan thermostat for a project, our team can assist. Contact us to discuss system integration, project requirements, or application questions.
