Furnace draft control with remote control feature

Details Furnace draft control with remote control feature Furnace draft control with remote control feature

G - Physics

05

B

341/19, 341/38.1

G05B 5/00 (2006.01) F23N 5/18 (2006.01) G05D 23/20 (2006.01)

Patent

CA 1253594

-14- ABSTRACT OF THE DISCLOSURE An apparatus for controlling the speed of a combustion blower motor includes first means for generating an output signal representative of a differential pressure. A second means provides a second signal representative of a desired airflow output of the blower and a summation circuit receives the first signal and the second signal and generates a command signal in response thereto. A power output circuit receives the command signal and responsively provides a regulated level of power to the motor for controlling the speed thereof. The first means may be embodied as a diaphragm-type differential pressure transmitter while the second means may be embodied as an adjustable voltage source or as a source which provides an output signal representative of a temperature.

512796

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