The TM-2100 series of Room Command Modules are designed for use with the FCC series of DDC terminal unit controllers. It’s also suitable for use with Facility Explorer series of field controllers. The set point dial enables the room occupant to adjust the working set point of the controller within the range of 12 to 28 °C or +/- according to the model number. The occupancy button enables the occupant to request a “temporary occupied“ (bypass) mode during “unoccupied” (night/weekend) operation. The “occupied” (comfort) mode is shown by an LED indicator.