Patent ID: 6062485
Filing Date: 2000-05-16
Classification: F24D,G05D

Abstract:
A hydronic heating system including a main boiler and a circulating pump for circulating a supply of heated water between a primary loop and a secondary, radiant loop coupled to the primary loop by a modulating valve, the system comprising:a control unit in communication with the modulating valve to control the amount of heated water to the secondary, radiant loop, wherein the control unit comprises:a maximum radiant loop water temperature dial used to set a maximum radiant loop water temperature;a minimum radiant loop water temperature dial used to set a minimum radiant loop water temperature;a maximum outdoor air temperature dial used to set a maximum outdoor air temperature; anda minimum outdoor air temperature dial used to set a minimum outdoor air temperature;wherein the control unit calculates a linear reset curve based on the maximum radiant loop water temperature, the minimum radiant loop water temperature, the maximum outdoor air temperature, and the minimum outdoor air temperature and operates the modulating valve to control the temperature of the water in the secondary, radiant loop based on the calculated linear reset curve.