Patent ID: 9201431
Filing Date: 2015-12-01
Classification: F24F,G05D

Abstract:
1. A thermostat comprising: a display a controller including a printed circuit board that controls operation of an associated HVAC system; a wireless communication device; user controls that provide instructions to the controller through which a user sets a program temperature and selects between a heating function and a cooling function; said display, controller, wireless communication device, and user controls being accommodated in a thermostat housing; wherein the printed circuit board includes a predetermined, permanently fixed schedule, said schedule including a plurality of time segments, each time segment is associated with a respective, predetermined, and permanently fixed maximum heating temperature; each time segment is also associated with a respective, predetermined, and permanently fixed minimum cooling temperature; wherein when the heating function is selected the controller operates the HVAC system to heat to the lesser of the program temperature and the maximum heating temperature, wherein when the cooling function is selected, the controller operates the HVAC system to cool to the greater of the programmed temperature and the minimum cooling temperature, and wherein the maximum heating temperature is a lower temperature than the minimum cooling temperature; said controller including an internal clock, said internal clock being configured to periodically synchronize with a dedicated time signal broadcast received via the wireless communication device; the thermostat further comprising at least one of the following two configurations: