8902F Modbus Thermostat

Key Specifications

· Linkage control via transceiver (optional) · Continuous fan operation (optional)
· 4-pipe fan convector design (optional) · AC + floor heating dual-function (optional)
· 86×86×40mm · 135g
· Smart FCU thermostat

Why choose 8902F

Smart FCU thermostat with optional linkage control, continuous fan operation, 4-pipe design, and dual-function AC + floor heating. Compact 86-type size, lightweight 135g.

· Linkage Control – Optional transceiver-based device-to-device automation
· Flexible Fan Operation – Optional continuous fan operation
· 4-Pipe Ready – Optional fan convector design
· Dual-Function – Optional AC + floor heating combination

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Operation Functions

1. Basic Operation Modes
– Heating Mode: Adjusts indoor temperature for warmth.  
– Cooling Mode: Provides cooling for hot conditions.  
– Fan Mode: Circulates air without heating or cooling.  
– Clock Mode: Allows scheduling and time-based operations.  


2. Button Locking & Timer Function
– Button Lock: Prevents accidental adjustments.  
– Timer: Enables scheduled on/off operations for energy efficiency.  


3. Sleep Mode 
– Automatically adjusts temperature gradually for Comfortable sleep conditions.  
– Energy savings.  


4. Advanced Options 
– Customizable settings for specialized use cases.  


5. Linkage Function (Optional)
· Optional transceiver-based linkage control
· Enables automated actions between AC, fresh air, floor heating, etc.
· Point-to-point RF communication, no central controller needed


6. Temperature Calibration  
– Ensures accurate temperature readings and adjustments.  


7. Power Failure Memory Function 
– Restores previous settings after a power outage.  


8. Anti-Freeze Protection (Optional)
– Prevents freezing in cold conditions for system longevity.  

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