Heating and cooling temperature control for a plurality of zones

Claim 1

IN A TEMPERATURE CONTROL SYSTEM SELECTIVELY OPERABLE IN HEATING OR COOLING CONDITION FOR CONDITIONING FIRST AND SECOND ZONES, FIRST ZONE AND SECOND ZONE DAMPERS POSITIONABLE TO OPEN AND PRESET PARTIALLY CLOSED POSITIONS TO CONTROL FLOW OF HEATING AND COOLING MEDIUM TO SAID RESPECTIVE ZONES; FIRST AND SECOND ELECTRICAL ACTUATORS FOR DRIVING RESPECTIVELY SAID FIRST AND SECOND DAMPERS, EACH SAID ACTUATOR CHARACTERIZED BY HAVING FIRST ELECTRICAL MEANS FOR CAUSING ITS RESPECTIVE DAMPER TO OCCUPY A FIRST PRESET PARTIALLY CLOSED POSITION FOR REGULATING FLOW OF HEATING MEDIUM DURING HEATING OPERATION AND SECOND ELECTRICAL MEANS FOR CAUSING ITS RESPECTIVE DAMPER TO OCCUPY A SECOND PRESET PARTIALLY CLOSED POSITION FOR REGULATING FLOW OF COOLING MEDIUM DURING COOLING CONDITION INDEPENDENT OF SAID FIRST POSITION, AND EACH OF SAID ACTUATORS HAVING OTHER MEANS OPERATIVE WHEN SAID ELECTRICAL MEANS ARE DEENERGIZED TO CAUSE SAID DAMPER TO BE HELD IN SAID OPEN POSITION; FIRST AND SECOND ZONE TEMPERATURE RESPONSIVE SWITCHES; EACH HAVING A DEMAND AND A SATISFIED CONDITION;