Electronic thermostat having high and low voltage control capability

Claim 1

A thermostat for controlling heating and cooling equipment of the type which includes a fan and at least one end device consisting of at least one heating and cooling fluid control valve, at least one electric heating apparatus and at least one air damper, said thermostat comprising: a base portion adapted to be mounted to a mounting surface; a cover portion adapted to be attached to said base portion; switch means for controlling the operation of the thermostat, said switch means being associated with said cover portion and being accessible for operation; temperature setting means associated with said cover portion for setting a nominal temperature set point; processing means being connected to one of said base and cover portions for receiving operating status signals and temperature indicating signals and for selectively generating output signals for controlling the heating and cooling equipment; a first means for sensing the temperature of the air of a space in which the thermostat is to control; a plurality of first connection means for connecting high voltage circuits associated with selected end devices; a plurality of second connection means for connecting low voltage circuits associated with selected end devices; said first connection means and said second connection means being separated from one another, said base portion being adapted to be attached to a conventional electrical box having a partition separating approximately one half of the interior from the other side thereof, each side being adapted to receive one of high voltage circuits and low voltage circuits, said partition separating said high voltage circuits from said low voltage circuits.