Method of field conversion of a heating system to a multiple stage modulating gas fired heat exchanger
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United States of America Patent
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Jul 14, 2020
Grant Date -
Jun 22, 2017
app pub date -
Dec 21, 2015
filing date -
Dec 21, 2015
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Abstract
A heating system retrofitted to be operable through multiple heat stages at a constant fuel-air mixture includes a tube heat exchanger having a plurality of burners, a combustion air blower (CAB) having an exhaust vent connected with the plurality of burners, the CAB operable at a first speed and a second speed, a first valve connecting a fuel source to a first subset of the plurality of burners, and a second valve connecting a fuel source to a second subset of the plurality of burners.
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