Limited modulation furnace and method for controlling the same

Details Limited modulation furnace and method for controlling the same Limited modulation furnace and method for controlling the same

F - Mech Eng,Light,Heat,Weapons

27

D

F27D 19/00 (2006.01)

Patent

CA 2538455

A limited modulation furnace and a method for controlling the limited modulation furnace using a floating control algorithm are disclosed. The method includes providing a furnace comprising a modulating furnace stage and at least one fixed heat output furnace stage, each fixed heat output furnace stage having an operational status of either on or off, passing a heating fluid through the furnace, measuring a temperature of the heating fluid exiting the furnace, determining an error based on a difference between the measured temperature and a set-point temperature, the set-point temperature being associated with a thermostat setting, determining whether the error is within a deadband range for the set-point temperature, and modifying at least one of the heat output of the modulating furnace stage or the operational status of at least one of the fixed heat output furnace stages in response to the error being outside the deadband range.

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