Method of and system for flame sensing and diagnostic

A method of determining presence of a flame in a furnace of a heating, ventilation, and air conditioning (HVAC) system. The method comprises determining, using a controller, whether a processor signal (G) is active, responsive to a determination that the processor signal (G) is active, determining,...

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Bibliographische Detailangaben
1. Verfasser:	Engler, Michael
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS BLASTING COMBUSTION APPARATUS COMBUSTION PROCESSES FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL HEATING LIGHTING MECHANICAL ENGINEERING ORDER TELEGRAPHS PHYSICS RANGES REGULATING OR CONTROLLING COMBUSTION SIGNALLING SIGNALLING OR CALLING SYSTEMS VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	A method of determining presence of a flame in a furnace of a heating, ventilation, and air conditioning (HVAC) system. The method comprises determining, using a controller, whether a processor signal (G) is active, responsive to a determination that the processor signal (G) is active, determining, using the controller prior to assertion of a flame-test input control signal, an output state of a first comparator, responsive to a determination that the output state of the first comparator is high, determining, using the controller prior to assertion of the flame-test input control signal, an output state of a second comparator, and responsive to a determination that the output state of the second comparator is low, transmitting, using the controller, a notification that a flame is present.