Leslie M Fry

US Patent:

20090243535, Oct 1, 2009

Filed:

Mar 31, 2008

Appl. No.:

12/059565

Inventors:

William A. Erdmann - Largo FL, US
Cornelius Hamilton - Wesley Chapel FL, US
Donna Borgman - Seminole FL, US
Leslie A. Fry - Largo FL, US

Assignee:

Johnson Controls Technology Company - Holland MI

International Classification:

H02P 3/18

US Classification:

318813

Abstract:

Fan relay boards are provided that include terminals configured to receive line power of approximately 115 volts, 208 volts, 230 volts, and 277 volts. The boards are configured to convert the line power to an approximately 24 volt output that is applied to a distribution circuit to select a high, medium, or low fan speed using relays. The boards may be coupled to a control device that designates the fan speed selected by the relays. The boards also may provide an approximately 24 volt power supply to external devices such as electric heaters, valves, and switches.