Quick Summary
The HTW-WF01-FC-2NE is a Digital Thermostat designed for two-pipe fan coil unit systems with heating and cooling operation. It controls multi-speed fans and two wired motorized valves for both heating and cooling using temperature sensing and programmed Modbus communication, providing precise local climate management.
This thermostat also supports an external sensor for flexible room temperature feedback and system monitoring. This page includes details on control logic, key functional highlights, technical specifications, project suitability, and customization options for engineering applications using Digital Thermostats.
Key Functional Highlights
(01) Coordinated fan and valve operation
The thermostat synchronizes fan speed with heating and cooling valve switching based on sensed temperature and user-defined setpoints. This coordination ensures stable room temperature and reduces wear on the system components in two-pipe fan coil applications.
(02) Modbus integration for monitoring
Built-in Modbus protocol allows the Digital Thermostat to communicate system status and receive commands for monitoring and control purposes. This is ideal for projects requiring remote data collection or integration with energy management systems.(Standalone version click here)
(03) External temperature sensor support
An external sensor can be connected to measure temperature at different points within a room or zone. This flexibility ensures precise control in larger spaces or where wall-mounted measurements alone may not be sufficient.
(04) Electrical ratings designed for FCU
Fan and valve relays are rated to handle standard electrical loads of fan coil units. This reduces the need for additional interface components and ensures stable, continuous operation in residential and light commercial projects.
(05) Key Functional Highlights
Details
Specifications
| Power Supply | 110 VAC (+/-10%) or 220 VAC (+10%, -15%) |
| Frequency | 50 / 60 Hz |
| System Type | Two-pipe fan coil unit |
| Operation Mode | Heating and cooling |
| Accuracy | ±1°C at 21°C |
| Fan Relay Load | 5A (3A inductive) |
| Valve Relay Load | 3A (1A inductive) |
| Setpoint Range | 5–35°C |
| Display Range | 5–99°C |
| Installation | 86×86 mm junction box or US 2×4 in box |
| Protection Class | IP20 |
| Storage Temperature | -5–45°C |
Display
Wiring
Project Fit & Customization
This Digital Thermostat is intended for standalone two-pipe fan coil units with wired fan and valve control. It is not suitable for projects requiring four-pipe systems, variable air volume control, or direct BMS integration without protocol adaptation. Engineering assessment is recommended for complex or non-standard installations.
OEM and ODM options are available to meet specific project requirements. Supported customizations may include OEM logo printing, housing color adjustments, and function modifications after technical discussion. All custom options are carefully evaluated to ensure reliability and maintain proper operation in systems using Digital Thermostats.
Certifications 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
Can this thermostat be used for four-pipe fan coil systems?
No. It is designed for two-pipe systems with separate heating and cooling valves. Four-pipe applications require different control logic.
Does it require an external temperature sensor?
No. It includes a built-in sensor, but an external sensor can be connected for improved temperature measurement flexibility.
Can it integrate with building management systems?
This model operates as a standalone Digital Thermostat with Modbus support but does not natively integrate with all BMS systems without additional protocol adaptation.
Are samples available and what is the minimum order quantity?
Samples are available for evaluation. The standard minimum order quantity is 300 units, but smaller quantities can be discussed for pilot projects.
Need Support
If you are selecting a model or planning a project, please contact us. We can help choose the right thermostat.
Related Thermostat Models
More product details, please click directly:
For two-pipe fan coil projects, a Digital Thermostat should be selected by system type, fan relay load, valve output, sensor position, and Modbus communication needs. The HTW-WF01-FC-2NE is suitable for projects that need heating and cooling operation, multi-speed fan control, wired motorized valve output, external sensor support, and project-based monitoring. For OEM buyers, contractors, and distributors, confirming wiring, power supply, sensor use, communication requirements, and order quantity before production will help reduce installation and commissioning risks.
If you are considering Digital Thermostats for two-pipe fan coil projects, contact us to discuss application suitability, technical details, and project support options.
