Liquid heaters and vaporizers – Automatic control of fluid fuel and water – Having fuel or feed bypass
Reexamination Certificate
2005-06-14
2005-06-14
Wilson, Gregory A. (Department: 3749)
Liquid heaters and vaporizers
Automatic control of fluid fuel and water
Having fuel or feed bypass
C122S447000
Reexamination Certificate
active
06904874
ABSTRACT:
Devices and methods for controlling a boiler system. One illustrative method includes controlling the bypass temperature by increasing the firing rate of the boiler. Further methods include bypass temperature control methods wherein both regular and fast control methods are used, where the regular method operates to control bypass temperature by using, first, a bypass valve, and second, possible increases in firing rate. The fast control method responds to particular situations suggesting potential condensation in a primary heat exchanger to increase firing rate without waiting for a bypass valve to fully open. Further embodiments include controllers programmed for or containing programming for performing steps of the method embodiments, as well as systems incorporating such controllers.
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Hammer Jeffrey M.
Pouchak Michael A.
Honeywell International , Inc.
Wilson Gregory A.
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