Introduction
The thermostat acquires the room temperature with its built-in NTC sensor
The heating contact will close when the room temperature falls below the selected setpoint in heating mode
The cooling contact will close when the room temperature exceeds the selected setpoint in cooling mode

Application
In conjunction with fans and valves, RTC89… is designed to control the valve in heating or cooling systems to maintain the desired setpoint temperature in Commercial buildings, Residential buildings, Light industrial buildings…

Features
Luxury Touch-Screen operation interface
On/off control output for valve actuators
Manual changeover of heating/cooling
Timing function for thermostat switch-on/ switch-off
Symbol for valve indication
“Key-lock” function for setted parameters protection
“fan-valve dependent control” or “fan-valve independent control” mode selectable

Technical data

Voltage: AC230V (AC110V / AC24V available) Load: 3A Power consumption: 3.5W Setting range: 5℃～35℃ Switching differential: ±0.5K Ambient temperature: -5～50℃ Protective housing: IP20 Housing material: Self-extinguishing PC

Selection table:

Model No. Fan control System control Backlight Application TKB89.3 Auto, Low, Mid, Hi Heating/Cooling Yes 2-pipe FCU system TKB89.42 Auto, Low, Mid, Hi Heating/Cooling Yes 2-pipe FCU system