American Standard Inc.

Alan G Metcalfe

David Marshall Foye

Joe M Baldwin

Tedd P Johnson

Merle A Renaud

A method of determining and controlling a load by a controller. The method comprises the steps of transmitting a signal for a first predetermined time period on an electrical line having a load in parallel with a capacitor; monitoring the electrical line for electrical activity within a second predetermined time period following the first time period; and controlling the load in response to the presence or absence of the electrical activity.

Method and apparatus for configuring and controlling a load

An interface for use between a thermostat and a controller for an HVAC system comprising: means for receiving a plurality of parallel commands from a thermostat where each command represents one of two possible states; means for coverting each of the plurality of parallel commands into a plurality of predetermined values; means for combining the predetermined values in a predetermined manner; and means for transmitting the combined predetermined values to the controller.

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Onalaska, WI, United States of America

Alan G Metcalfe