Room temperature control unit responsive to occupancy

Claim 1

A room temperature control system for automatically adjusting the room temperature control setpoint in accordance with the occupied or unoccupied room status and with the heating or cooling mode status of a room heating/cooling apparatus, comprising: a plurality of first switches each corresponding to a respective predetermined temperature value, respective first switches being activated when the room temperature reaches said respective predetermined temperature value; a temperature selection device for selecting a desired room temperature value, said selection device having first, second and third common contacts, each said contact being selectively operably connected to respective ones of said first switches, said second common contact corresponding to said desired room temperature and said first and third contacts corresponding respectively to predetermined lower and upper temperature limit setpoints defining a range of room temperatures for said control system to operate within; a thermostatic switch alternately activated and deactivated in accordance with the operating mode of said heating/cooling apparatus; and a keysensor switch alternately activated and deactivated in accordance with the occupancy status of the room, said temperature control system operable to selectively adjust said desired room temperature value in accordance with the room occupancy status as indicated by said keysensor switch, and said temperature control system being further operable to selectively adjust said desired room temperature value to one of said predetermined upper and lower temperature limit setpoints in accordance with the operating mode of said heating/cooling apparatus as indicated by said thermostatic switch.