Boiler integrated control with non-linear outdoor reset methodology
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United States of America Patent
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Dec 29, 2020
Grant Date -
Mar 8, 2018
app pub date -
Sep 8, 2016
filing date -
Sep 8, 2016
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Abstract
A hydronic water heating system heats water for various types of heat emitters. A boiler assembly includes a user interface which receives user-defined water temperature set point corresponding to a minimum outdoor temperature, and an integrated controller generates a nonlinear outdoor reset curve between the user-defined set point and a second set point corresponding to maximum outdoor temperature for which heating is required, and regulates the boiler to heat water to a temperature corresponding to a set point along the nonlinear output reset curve and based on a detected outdoor temperature. The nonlinear outdoor reset curve may be generated based on aggregated heat output functions for various types of heat emitters. A linear outdoor reset curve may be generated between a maximum water temperature set point and the user-defined set point, having a slope equal to an instantaneous slope of the nonlinear outdoor reset curve at the user-defined set point.
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