8926RHKLD Tuya WiFi FCU Floor Heating Thermostat
Key Specifications
· Integrated AC & floor heating thermostat for fan coil unit (FCU) and hydronic floor heating (water system)
· WiFi Tuya App (optional) · RS485 connecting interface (optional)
· Built-in two-pipe & four-pipe systems with integrated AC/UFH control program
· 86×86×44mm · 170g
The 8926RHKLD is an integrated FCU and floor heating thermostat designed for fan coil units and hydronic floor heating systems. It supports optional Tuya WiFi for remote control and scheduling, with optional RS485 Modbus for building automation integration. Built-in 2-pipe and 4-pipe control logic makes it suitable for both chilled and hot water systems.
This thermostat supports Modbus RTU communication. For official protocol details, visit the Modbus Organization website.
Why Choose 8826RHKLD Tuya WiFi FCU floor heating thermostat
· WiFi Tuya App – Optional remote control via Tuya App for smart scheduling and operation
· RS485 Modbus – Optional RS485 interface for building automation and central control
· 2-Pipe / 4-Pipe Ready – Built-in support for two-pipe and four-pipe fan coil systems with integrated AC and floor heating control logic
· FCU + Floor Heating Combo – One thermostat controls both fan coil (chilled/hot water) and water floor heating terminals
· Compact Size – 86×86×44mm fits standard wall boxes
· Lightweight – 170g for easy installation
8926RHKLD Tuya WiFi FCU floor heating thermostat Operation Functions
1. Basic Operation Modes
– Power On/Off: One-key control to turn the thermostat on or off.
– Cooling Mode: Provides cooling and controls the cooling valve.
– Heating Mode: Provides heating and controls the heating valve.
– Fan Mode: Runs fan only without cooling or heating.
– Fan Speed: Adjustable to Low, Medium, High, and Auto.
2. Temperature Adjustment
– Manually set desired temperature between 5°C and 35°C.
– High precision temperature control with ±1°C accuracy.
3. Child Lock & Timer Function
– Child Lock: Prevents misoperation by children.
– Timer: Supports 3-period cycle timer for auto on/off control.
4. Sleep Mode
– Automatically adjusts temperature for comfortable sleeping.
– Runs for 8 hours then exits automatically, saving energy.
5. Time Setting
– Allows manual time adjustment.
– WiFi version syncs time automatically from the internet.
6. Temperature Calibration
– Calibrates temperature display for accurate reading.
7. Power Failure Memory
– Restores previous settings automatically after power recovery.
8. Anti-Freezing Protection (Optional)
– Activates output automatically at low temperature to prevent freezing.
9. Fault Alarm
– Shows E1 code and stops output when sensor error occurs.
10. Factory Reset
– Restores all parameters to default settings.
11. Advanced Settings
– System type, temperature limits, fan control, backlight, and more customizable parameters.