SAS922XMTW Hotel Keycard DX Thermostat

Detects room occupancy status via keycard switch, automatically shifting to energy-saving setpoints when unoccupied, cutting HVAC runtime without compromising guest comfort upon return.

Precisely tailored PID and staging algorithms for direct-expansion units ensure stable discharge air temperature, prevent system hunting, and maximize overall coefficient of performance (COP).

Enforces a mandatory minimum off-cycle to prevent short-cycling, shielding the compressor from liquid slugging, thermal overload, and premature mechanical wear.

Supports both normally-open and normally-closed contact configurations. Automatically shuts down or sets back HVAC operation when windows or doors are opened for ventilation, avoiding energy waste.

High-contrast LCD screen paired with tactile push buttons enables effortless parameter viewing and adjustments, even under dim lighting conditions typical of hotel corridors and rooms.

All user-defined setpoints and configurations are retained in EEPROM. Upon power restoration, the thermostat resumes full operation automatically without requiring manual re-entry or reprogramming.