Combustion – Timer – programmer – retarder or condition responsive control – Sensor of first burner controls second burner – e.g. – pilot...
Patent
1993-04-30
1995-07-25
Dority, Carroll B.
Combustion
Timer, programmer, retarder or condition responsive control
Sensor of first burner controls second burner, e.g., pilot...
431 66, 431 69, 431 74, F23Q 908
Patent
active
054357179
ABSTRACT:
A fuel valve and ignitor control system in which pull-in current for a fuel valve operating on rectified alternating current is supplied through a first normally open relay whose coil is connected in series with normally open contacts of a second relay and an intermittently operating hot surface ignitor. Normally closed contacts of the second relay are connected in series with the ignitor and the fuel valve through a holding resistor, whereby actuation of the second relay provides unrectified alternating current to the ignitor and actuates the first relay to provide pull-in current to the fuel valve, and whereby deactivation of the second relay provides holding current to the fuel valve through the ignitor.
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Honeywell Inc. product information brochure, Form Number 68-0070-1 for S89 and S890 Hot Surface Ignition Modules (Rev. 9-89).
Bohan, Jr. John E.
Perschbacher Vicki L.
Peterson Scott M.
Dority Carroll B.
Honeywell Inc.
Rubow Charles L.
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