ODD55F is suitable to control 3-speed fan coils. It has three relay for controlling the fan and 2 relays for controlling the valves and the bypass thermostat. It has an input for connecting a 10K NTC to control a low-temperature thermostat, an input for detecting thewindow status for the automatic shutdown of the fan coil when the window is open, 2 inputs for technicalalarms (such as bathroom alarm) and 1 input for presence sensors to allow the maximum energy savings. Electric featuresPower supply by BUS 24Vcc – 200mA