Burner control system

F - Mech Eng,Light,Heat,Weapons – 23 – N

Patent

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Details

341/19, 158/57

F23N 5/18 (2006.01) F23N 5/20 (2006.01) F23N 5/24 (2006.01) F23N 5/08 (2006.01)

Patent

CA 1142246

ABSTRACT A burner control apparatus for use with a fuel installation that has an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is pre- sent in the monitored combustion chamber, and one or more devices for control of ignition and/or fuel flow. The burner control apparatus comprises lockout apparatus for de-energizing the con- trol apparatus; a control device for actuating the ignition and/ or fuel control devices, and a timing circuit that provides four successive and partially overlapping timing intervals of precise relation, including a purge timing interval, a pilot ignition interval, and a main fuel ignition interval. The present inven- tion further includes a burner control system which verifies the proper operation of certain sensors in a burner or furnace includ- ing particularly the air flow sensor. Additionally, the present system also prevents an attempt to ignite a burner if a condition is detected which indicates that the air flow sensor has been bypassed or wedged in the actuated position.

345071

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