The Climatemaster ATP32U04 Thermostat provides 3 stages of heating, 2 stages of cooling, and programmable temperature/humidity control of 24V water-source heat pump equipment. Other features include: Four periods per day, ºF or ºC temperature display, 12 or 24-hour clock, Individual heat, and cool setpoints, Zero temperature droop performance, Automatic (program mode) or manual (HOLD) operation, 7-day programming, Convenient overrides allow temporary setpoint changes, Setpoints are permanently held in memory (no batteries used) and retained during power outages, Room temperature offset adjustment, Progressive Recovery anticipates the time required to bring the space temperature to the next programmed event, and brings on the heat pump accordingly, Large backlit dot matrix display is activated whenever a key is pressed and remains on for 25 seconds, Menu-driven programming with five navigation buttons, (UP/DOWN/LEFT/RIGHT/SELECT) for ease of use, Fault indication with red backlight display, Configurable service interval messages and servicing contractor contact information, Keypad lockout, Back-plate wiring connections for easy installation, Exclusive fault identification (When used with CXM, DXM, or DXM2) displays fault from board (e.g. condensate overflow) and suggests possible causes, Compatible with optional AST008C sensor for use as remote and/or outdoor sensor, or for indoor wall mounted sensor use ASW06. Electrical Rating: Input Power: 18 to 30 VAC, 50/60 Hz. Operating Conditions: 32ºF to 104ºF [0ºC to 40ºC], 10% to 95% non-condensing. Temperature Settings: Setpoint range: 55ºF to 95ºF [12ºC to 35ºC], +/- 2ºF [1ºC] Note: User must maintain thermostat setting within proper unit operating temperature range (See specific unit(s) IOM for details), Dehumidification setpoint range: 15% to 95% RH, Humidification setpoint range: 10% to 45% RH. Output Ratings: Maximum current for each output is 1.0 Amp (2.0 max. output total).