The Underfloor Heating & Fan Coil Modbus Thermostat is a versatile and user-friendly device designed to control air to water heat pump systems. With modbus protocal, users can easily control both heat pump and home heating system at the same time. This air to water heat pump thermostat with two outputs for fan coil valve and underfloor water valve, it also workable for 3 fan speed fan coil or EC fan coil.
This Air to Water Heat Pump Modbus Smart Thermostat is a cutting-edge device that brings convenience and control to your underfloor heating and fan coil heating at air to water heat pump system. Designed with 4.3inch color touch interface, this heating & cooling modbus heat pump thermostat allows easy temperature adjustments and offers remote control capabilities.
Equipped with WiFi connectivity, this intelligent touch modbus thermostat enables users to remotely manage and control their underfloor heating system and ceiling fan coil system from anywhere using a smartphone, tablet, or other connected devices. Whether you're at home or away, you can effortlessly adjust the temperature settings to ensure optimal comfort and energy efficiency.
Designed with RS485/Modbus connectivity, E-top RS485/Modbus thermostat can work with heat pump main controller. As different brand air to water heat pump use differnet modbus protocal, E-top controls can customized thermostat accordingly to provided modbus protocal.
Our FT-CS03(2-in-1 Integrated Controller) controller is engineered to meet the highest international standards for safety, reliability, and environmental responsibility:
Safety & EMC: Fully compliant with CE (RED/LVD/EMC), UKCA, FCC, and ETL Listed standards.
Environmental: Certified by RoHS and REACH, ensuring lead-free and eco-friendly manufacturing.
Quality Management: Produced in an ISO 9001:2015 and ISO 14001:2015 certified facility.
We offer a variety of stylish and functional designs to match your specific HVAC project requirements. From professional LCD interfaces to elegant high-definition color touchscreens, we provide the perfect climate control solution for modern buildings.
| Display | Smart Underfloor Heatiang & Cooling Thermostat |
| WiFi Application | TuyaSmart, Smart Life, Ecohome Life ( Tuya cloud) |
| WIFI | 2.4G( Don't support 5G) |
| Power Supply | 230Vac |
| Current | 3A for fan coil unit control |
| 3A NO, NC for thermal actuator control | |
| 3A for heat valve, cool valve control | |
| Set Temp. Range | 5~35 ℃ |
| Ambient Temp. | 0~50 ℃ |
| Frost Protection Temp. | 5 ℃ ~15℃ |
| Floor Protection Temp. | N/A |
| Sensor Select | Internal sensor |
| Sensor Type | NTC β=3950 R25℃=10KΩ |
| Relative Humidity | 85% |
| Accurancy | ±0.5 ℃ |
| Modes | MAN/Holiday/PRG Mode |
| Programmability | 7 days 4 periods ( Customizable) |
| Window Open Detection | Yes |
| Child Lock | Yes |
| Protection Class | IP20 |
| Thermostat Dimension | 127X86X19mm |
| Materils | ABS+PC (Rohs certificated) |
| Certificate | CE (RED/EMC/LVD), UKCA, FCC, ETL Listed, RoHS, REACH, ISO9001:2015, ISO14001:2015 |
| OEM | 1. Customized logo and package |
| 2. Customzied software ( change to customer's user interface and control logic | |
| 3. Customized hardware ( change the PCB and schematic based on the request) |
Advanced Control & Application Scenarios
A1: The FT-CS03 uses intelligent sequential control logic. In heating mode, it prioritizes the underfloor heating for radiant comfort. If the temperature gap exceeds 2°C (adjustable via Param 51), it automatically activates the Fan Coil for rapid heating boost. This ensures the perfect balance between comfort and speed.
A2: Yes, absolutely. It is specifically designed as a terminal controller for Heat Pump systems. It supports both 2-pipe and 4-pipe configurations and can manage "Cooling Only" or "Heating Only" modes for both the fan and the floor independently (Params 50 & 53).
A3: Yes. The FT-CS03 supports an optional Floor Cooling mode (Param 53). You can set a startup dead zone (Param 55) to ensure the system operates efficiently without reaching the dew point, making it ideal for modern hydronic cooling setups.
Smart Integration & Connectivity
A4: The Wi-Fi version is fully compatible with the Tuya Smart / Smart Life App, supporting both Android and iOS. It also supports voice control via Amazon Alexa and Google Assistant for seamless smart home integration.
Q5: Do you offer integration options for Building Management Systems (BMS)?
A5: Yes. We provide RS485/Modbus RTU communication as an ODM service. This allows professional installers to integrate the thermostat into larger hotel or commercial building automation systems.
Manufacturing & Customization (OEM/ODM)
A6: E-TOP has been a professional OEM/ODM thermostat manufacturer since 2003. We offer:
Custom Branding: Free logo printing on thermostats with an MOQ of 500 units.
Customized Packaging: Personalized box designs with an MOQ of 1,000 units.
Firmware Customization: Adjusting engineering parameters (like Params 1-57) to meet specific project requirements.
A7: Samples are typically ready in 3 working days, while mass production orders take approximately 25 days. All products come with a 12-month warranty and carry CE, ROHS, and RED certifications for international markets.
A: Yes, as a professional manufacturer, we provide complete Modbus RTU register maps for the FT-CS03(2-in-1 Integrated Controller) , allowing system integrators to easily configure baud rates and slave IDs for smart building automation.
The Underfloor Heating & Fan Coil Modbus Thermostat is a versatile and user-friendly device designed to control air to water heat pump systems. With modbus protocal, users can easily control both heat pump and home heating system at the same time. This air to water heat pump thermostat with two outputs for fan coil valve and underfloor water valve, it also workable for 3 fan speed fan coil or EC fan coil. Item No.: FT-CS03 (2-in-1 Integrated Controller) Visual Interface: Attractive and Big HD Color LCD Display for intuitive operation. Operation Modes: Multiple modes control including Manual, Economy, and PRG (Programmable) Mode. System Compatibility: Supports Water Underfloor Heating or Cooling systems (3A relay). Dual-Season Support: Integrated Heat Mode & Cold Mode for year-round comfort. Ventilation Control: 3-speed fan control or advanced EC fan control compatible. Smart Scheduling: 7 days Fully Programmable (4 periods per day) to maximize energy efficiency. Building Automation: RS485/Modbus RTU protocol supported (Custom ODM service available). Wireless Connectivity: Tuya WiFi Remote Control via Smartphone App. User Convenience: Real-time Clock display and user-friendly interface. Safety & Protection: Built-in Frost protection (Param 56) and Child Lock functions. Certified Quality: Fully compliant with CE, ROHS, and RED international standards.
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The Underfloor Heating & Fan Coil Modbus Thermostat is a versatile and user-friendly device designed to control air to water heat pump systems. With modbus protocal, users can easily control both heat pump and home heating system at the same time. This air to water heat pump thermostat with two outputs for fan coil valve and underfloor water valve, it also workable for 3 fan speed fan coil or EC fan coil. Item No.: FT-CS03 (2-in-1 Integrated Controller) Visual Interface: Attractive and Big HD Color LCD Display for intuitive operation. Operation Modes: Multiple modes control including Manual, Economy, and PRG (Programmable) Mode. System Compatibility: Supports Water Underfloor Heating or Cooling systems (3A relay). Dual-Season Support: Integrated Heat Mode & Cold Mode for year-round comfort. Ventilation Control: 3-speed fan control or advanced EC fan control compatible. Smart Scheduling: 7 days Fully Programmable (4 periods per day) to maximize energy efficiency. Building Automation: RS485/Modbus RTU protocol supported (Custom ODM service available). Wireless Connectivity: Tuya WiFi Remote Control via Smartphone App. User Convenience: Real-time Clock display and user-friendly interface. Safety & Protection: Built-in Frost protection (Param 56) and Child Lock functions. Certified Quality: Fully compliant with CE, ROHS, and RED international standards.
Learn More
The Underfloor Heating & Fan Coil Modbus Thermostat is a versatile and user-friendly device designed to control air to water heat pump systems. With modbus protocal, users can easily control both heat pump and home heating system at the same time. This air to water heat pump thermostat with two outputs for fan coil valve and underfloor water valve, it also workable for 3 fan speed fan coil or EC fan coil. Item No.: FT-CS03 (2-in-1 Integrated Controller) Visual Interface: Attractive and Big HD Color LCD Display for intuitive operation. Operation Modes: Multiple modes control including Manual, Economy, and PRG (Programmable) Mode. System Compatibility: Supports Water Underfloor Heating or Cooling systems (3A relay). Dual-Season Support: Integrated Heat Mode & Cold Mode for year-round comfort. Ventilation Control: 3-speed fan control or advanced EC fan control compatible. Smart Scheduling: 7 days Fully Programmable (4 periods per day) to maximize energy efficiency. Building Automation: RS485/Modbus RTU protocol supported (Custom ODM service available). Wireless Connectivity: Tuya WiFi Remote Control via Smartphone App. User Convenience: Real-time Clock display and user-friendly interface. Safety & Protection: Built-in Frost protection (Param 56) and Child Lock functions. Certified Quality: Fully compliant with CE, ROHS, and RED international standards.
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Address:No.6 of Tong'an Industrial Park, Meixi Rd,Tong'an District, Xiamen China 361100
Phone:+86 0592 6155792
Email:info@etopcontrols.com
