Patent ID: 6453993
Filing Date: 2002-09-24
Classification: F24F,G05D

Abstract:
A control system for controlling a heating source capable of heating water to be delivered to a plurality of heat exchangers and for controlling a cooling source capable of cooling water to be delivered to the plurality of heat exchangers, said control system comprising:a plurality of zone controllers, each zone controller connected to a respective heat exchanger so as to control delivery of water from the heating or cooling sources to the respective heat exchanger, each zone controller being operative to generate information concerning either a demand for heating or a demand for cooling as well as information concerning any next to occur future demand for heating or cooling; a system controller in communication with each of said zone controllers, said system controller being operative to periodically receive information concerning each zone controller's current demand for heating or cooling as well as information concerning each zone controller's next-to-occur future demand for heating or cooling, said system controller being furthermore operative to periodically determine whether there is a sufficient predominance of current heating demands being received from said zone controllers so as to timely activate the heating source or whether there is a sufficient predominance of current cooling demands from said zone controllers so as to timely activate the cooling source, said system controller being furthermore operative to determine whether there is a sufficient predominance of current and future heating demands so as to timely activate the heating source or whether there is a sufficient predominance of current and future cooling demands so as to timely activate said cooling source in the event that there is not a sufficient predominance of current heating or cooling demands from said zone controllers.