Combustion blower control for modulating furnace
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United States of America Patent
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Dec 6, 2011
Issued Date -
N/A
app pub date -
May 27, 2008
filing date -
May 27, 2008
priority date (Note) -
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Abstract
A furnace includes a combustion blower and one or more pressure switches. In some cases, the one or more pressure switches may be used to calculate one or more operating points for the combustion blower. Additional operating points may be calculated by interpolation and/or extrapolation, as appropriate. The furnace may temporarily alter these operating points as necessary to keep the furnace safely operating in response to minor and/or transient changes in the operating conditions of the furnace.
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