Control of staged heating and cooling apparatus by a...

Details Control of staged heating and cooling apparatus by a... Control of staged heating and cooling apparatus by a...

G - Physics

05

D

341/27

G05D 23/19 (2006.01) F24F 7/06 (2006.01) F24F 11/00 (2006.01) G05D 23/24 (2006.01)

Patent

CA 2032874

ABSTRACT OF THE DISCLOSURE A heating and cooling apparatus wherein either or both the heating apparatus and cooling apparatus are two-stage is controlled by a thermostat through four connecting wires. A signal on one of the wires enables the functions of controlling operation of the circulator fan and controlling second-stage operation of whichever apparatus is two-stage.

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