Safety apparatus for combustion device
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United States of America Patent
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Jan 27, 1987
Grant Date -
N/A
app pub date -
Feb 8, 1985
filing date -
Jan 16, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A CO sensor is mounted on the heat exchanger of a gas water heater (or other combustion unit) and is connected in circuit with a detecting unit mounted separately from the heater. The detecting unit generates a control voltage in opposition to a reference voltage on a solenoid. The solenoid controls a valve in a fuel supply passage to a burner (or burners) in the heater, thereby shutting off the burners when the CO concentration reaches a predetermined value. A timing circuit may be added to cut off the burners whenever a lesser CO concentration continues for a predetermined time period.
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