Combustion blower control for modulating furnace

Details Combustion blower control for modulating furnace Combustion blower control for modulating furnace

2011-07-26

2011-07-26

Rinehart, Kenneth B (Department: 3743)

Combustion

Timer, programmer, retarder or condition responsive control

Responsive to combustion chamber pressure

C431S012000, C431S018000, C431S020000, C126S11600A

Reexamination Certificate

active

07985066

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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