Diagnostic annunciator

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

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Details

340 52F, 340213R, 340223, G08B 1900

Patent

active

039672816

ABSTRACT:
An annunciator is adapted for use with a boiler having a flame safeguard programmer providing a first signal and a second signal representative of respective first and second occurring faults in the boiler. The programmer also provides an alarm signal when the flame of the boiler is out. The annunciator includes means responsive to the first signal for providing a fist indication representative of the first fault. Similarly, means is responsive to the second signal to provide a second indication representative of the second fault. Means is provided for inhibiting the second indication until the fault associated with the first indication has been corrected so that the second indication begins with the correction of the first occurring of the faults and terminates with the correction of the second occurring of the faults. Means is provided for resetting the annunciator when nuisance shutdowns are self-corrected. Memory means is provided for maintaining the indication of serious malfunctions they may have self-corrected. "No pilot" and "main fuel" indications are provided from a single alarm contact in the flame safeguard programmer. A time delay is provided to inhibit the indication of certain faults during an initial startup period.

REFERENCES:
patent: 3264613 (1966-08-01), Stolle
patent: 3729734 (1973-04-01), Kipling

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