Quick Summary
The HTW-WF01-FC-2KN Thermostat With Keycard Modbus is designed for 2-pipe fan coil systems in heating and cooling applications. It controls a 3-speed fan and two on/off motorised valves for heat and cool. The unit supports keycard input for occupancy logic and enables Modbus RS485 communication for central system integration and monitoring.
This page explains the control functions and their practical value in FCU projects. It also covers wiring reference, key parameters, and model selection guidance, together with project fit considerations, customisation options, and common questions with clear answers.
Key Features
(This section explains the core control functions and their practical value.)
(01) 2-pipe heating and cooling control
This Thermostat With Keycard Modbus supports standard 2-pipe FCU systems with heating and cooling changeover. It helps simplify system design and ensures stable control in typical hotel or residential room applications.
(02) 3-speed fan control
Three fan speeds allow flexible airflow adjustment during operation. This improves comfort while keeping noise under control, and supports stable fan operation across different load conditions.
(03) Keycard occupancy input
The Thermostat With Keycard Modbus uses keycard input to detect room occupancy. It helps reduce unnecessary energy use when rooms are empty, which is useful in hotel or serviced apartment projects.
(04) Modbus RS485 communication
The Thermostat With Keycard Modbus supports RS485 Modbus for BMS integration. It enables central monitoring and consistent control across multiple rooms, improving operation efficiency. If you need standalone model, you can refer to this model: HTW-WF02-FC-2.
Product Design and Display
Technical Specifications
(This section lists the key parameters for reference and project confirmation.)
| Power Supply | 100~250Vac |
| Frequency | 50/60Hz |
| Fan Relay Load | 5A (3A inductive) |
| Valve Relay Load | 3A (1A inductive) |
| Accuracy | ±0.5°C or ±1°F |
| Sensor | NTC3950, 10K |
| Setpoint Range | 5~35°C |
| Installation | EU or standard electric box |
Wiring Diagram
(This section provides the wiring reference diagram for correct installation.)
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 |
| Example | HTW-WF01-FC-xx: if xx = 2KN, it stands for a 2-pipe system with on/off valve control, keycard function, and Modbus communication. Most sub-models are ready-made. Kindly contact us to confirm availability. |
Project Fit & Customization
(This section explains where the product can be used, its limits, and OEM/ODM options.)
This Thermostat With Keycard Modbus is suitable for standard 2-pipe fan coil systems with on/off valve control. It is not suitable for 4-pipe systems, modulating valve control, or projects requiring BACnet or WiFi integration.
Despite these limits mentioned above, ODM customisation can be discussed based on project requirements. Communication type or control logic may be adjusted where technically feasible and depending on project scale.
OEM customisation is also supported. Options include logo printing, colour selection, and label design. These help align the product with project branding and installation needs.
Certificates and Compliance
Frequently Asked Questions
Q1. Can this thermostat with Keycard Modbus be used in both heating and cooling systems?
Yes, it supports 2-pipe systems with heating and cooling changeover for standard FCU applications.
Q2. Does it support building management system integration?
Yes, the Thermostat With Keycard Modbus supports RS485 Modbus for central monitoring and control.
Q3. Is the keycard function required for operation?
No, it is optional. It is mainly used for energy saving in hotel or occupancy-based applications.
Q4. Do you support samples and what is the MOQ?
Yes, samples are available. MOQ is usually 300 units, but smaller quantities can be discussed.
Q5. How can we place an order?
Please contact us to confirm requirements. We will issue a PI. Payment supports TT, PayPal, Visa. Terms include EXW, FOB, DAP.
Q6. How will the goods be shipped?
Courier delivery takes about 7 days. Air freight is similar. Sea shipping usually takes over one month depending on destination.
Related Thermostat Models
For similar FCU projects or different communication options, please contact us for model selection and application support. Also you can refer to:
This Thermostat With Keycard Modbus fits typical hotel or residential FCU systems requiring simple control and Modbus integration. It provides stable operation with clear control logic. It supports efficient room management and energy use in multi-room projects. [More models: fan coil thermostat]
