Vent proving system
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United States of America Patent
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Aug 20, 2019
Grant Date -
Aug 30, 2018
app pub date -
Apr 27, 2018
filing date -
Nov 16, 2009
priority date (Note) -
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Abstract
A vent proving system is described for use with a gas fired appliance. The gas fired appliance includes a gas burner, a vent damper for selectively opening or closing an exhaust vent from the gas fired appliance and a relay control for operatively controlling the vent damper and the gas burner to open the damper if the gas burner is on. The vent proving system comprises a sensor for sensing a variable in the vent representing air flow direction in the vent. An electrical switch is connected in series between the relay control and the vent damper. A controller is operatively connected to the sensor, the electrical switch and to the relay control.
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