FCU Thermostat with WiFi & Modbus | 2-Pipe / 4-Pipe Fan Coil Controller

The BT02 FCU thermostat is designed for fan coil unit (FCU) systems in commercial HVAC projects such as hotels, offices, and residential buildings.

It supports both 2-pipe and 4-pipe configurations, offering flexible control for fan speed, motorized valves (ON/OFF or 0-10V), and optional communication via WiFi or Modbus for building automation systems.

>> Product Video                                          

>> Technical Parameter                             

>> Model Table Selection Guide                           

Product Photo	Model NO.	Power Supply	Communication	Pipe System	Valve control	Fan Control
	BT02-WF-FCU-2	24VAC / 230VAC	Wi-Fi	2-pipe	on/off	3-speed fan
	BT02-WF-FCU-4	24VAC / 230VAC	Wi-Fi	4-pipe	on/off	3-speed fan
	BT02-WF-FCU-2M	24VAC / 230VAC	Wi-Fi	2-pipe	0-10V Modulating	3-speed fan
	BT02-FCU-2N	24VAC / 230VAC	Modbus	2-pipe	on/off	3-speed fan
	BT02-FCU-4N	24VAC / 230VAC	Modbus	4-pipe	on/off	3-speed fan
	BT02-FCU-BAC-4	24VAC / 230VAC	BACnet	4-pipe	on/off	3-speed fan
	BT02-FCU-BAC-4M	24VAC / 230VAC	BACnet	4-pipe	0-10V for cooling, on/off for heating	3-speed fan
	BT02-WF-FCU-EC-2	24VAC / 230VAC	Wi-Fi	2-pipe	on/off	0-10V
	BT02-FCU-EC-2M	24VAC / 230VAC	NO	2-pipe	0-10V	0-10V

>> Detailed Image                                     

>> Wiring Diagram                                    

>> Key Features                                       

• Supports 2-pipe and 4-pipe fan coil unit (FCU) systems, compatible with most HVAC projects
• Flexible control options with 3-speed fan or 0–10V output, suitable for different system designs
• Works with ON/OFF or modulating valves, adapting to various project requirements
• Optional WiFi or Modbus RS485 communication for smart control and BMS integration
• Modern touchscreen interface with clear display, improving user experience in hotels and apartments
• Designed for standard EU 86mm wall box, ensuring easy installation and replacement
• Stable and reliable performance for long-term commercial HVAC operation
• Supports OEM customization (logo, interface, functions) for brand distributors
• Suitable for multiple applications including hotels, offices, apartments, and building automation systems
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>> Applications                                             

•   ● Hotel room HVAC control (with keycard energy saving)
•   ● Office FCU system control
•   ● Apartment climate control
•   ● Building automation (BMS integration via Modbus)

>> Project Reference                                                  

• 349 units installed in UAE apartment project
• Customized 4-Pipe FCU Thermostat with Heating-Mode Run-Down Fan Timer

>> FAQ                                                                      

Q1: Can this thermostat work with 4-pipe FCU?

Yes, it supports both 2-pipe and 4-pipe systems.

Q2: Does it support Modbus?

Yes, Modbus is optional.

Q3: Can it control 0-10V valve?

Yes, optional configuration is available.