FT-09 Touch screen thermostat is the best seller among our FCU thermostat series for its modem SIMENS style design and intuitive operation. This Modbus communication HVAC thermostat is widely used in Fan Coil Unit system to control fans and motorized zone valves of heating/cooling central air-conditioning, similar as other digital room thermostats, Such 230VAC flush mounted capacitive touch screen HVAC thermostat is workable both for 2 pipe system and 4 pipe system applications.   Function list: • Room temperature control via built-in temperature sensor or external room temperature sensor. • Selection of operating mode via touch screen. • 2 pipe ( ON-OFF or EC motor modulating output)  or 4 pipe system (ON/OFF output)  • 3 fan speed and auto fan speed control ( ON/OFF output or 0-10V EC Fan output) • Display of current room temperature or setpoint in °C and/or °F. • Minimum and maximum limitation of room temperature setpoint. • Key lock function: unlock, total lock and setpoint ( customized accordingly to project need) • 2 multifunctional inputs, freely selectable for:  − Window contact  − External room temperature or return air temperature sensor • RS485/Modbus communication •White & Black color available   If you are interested in such fan coil modbus touch screen thermostat, pls. contact us for more detail information .