SuitePRO 3-speed fan coil thermostat, 24-volt (AC), 2- or 4-pipe with manual/auto heat or cool changeover. TB6575A, TB6575B, and TB8575A family of digital fan-coil thermostats provide line/low voltage on/off control for various fan-coil units in residential and commercial applications. Great for use in hotels, condos, and classrooms. Simple, intuitive user interface and ease of installation. Attractive modern styling ideal for hotels and condos. Digital display of ambient temperature, set point, mode icons show when cooling or heating relays operate, when energy savings mode is active, and fan status. Four buttons allow manual control of system operation, fan speed, and temperature set point adjustment. VersaSpeed fan ramp algorithm automatically adjusts low, medium, high fan speed. Optional freeze protection feature that turns on heat if necessary. Activity sensing algorithm sets back thermostat to economy mode. Auto fan rest option sets back fan to auto mode. Energy savings mode -- external energy savings input from dry contact such as time switch, occupancy sensor, or hotel keycard overrides comfort set point with selectable setback heating or cooling set points. Energy savings input configurable as a normally open or normally closed dry contact. Proportional plus integral (P+I) control algorithm for precision temperature regulation. Selectable Celsius (C) or Fahrenheit (F). Adjustable deadband, in auto changeover mode, for heat and cool control. Adjustable maximum heating and minimum cooling set point limits. Installer setup mode allows changes of operating parameters. EEPROM permanently retains user settings, including set points, during power loss (no batteries required). Capability to display temperature sensor failure for easier troubleshooting. Optional remote temperature sensor and remote pipe sensor.