The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2002
Filed:
Feb. 06, 2001
Ronald R. Rayburn, Norman, OK (US);
Neil A. Hughes, Norman, OK (US);
York International Corporation, York, PA (US);
Abstract
A control system for a heating, ventilating, and air conditioning unit having a heating stage, a cooling stage, and an economizer is provided. The system includes a memory configured to store a first predetermined temperature range and a second predetermined temperature range. The system also includes a control having an input device configured to receive an indoor air temperature representative of the air in one or more zones and a supply air temperature representative of the air entering the one or more zones. The control selectively activates at least one of the heating stage, the cooling stage, and the economizer when the indoor air temperature is outside of the first predetermined temperature range. The control also selectively activates at least one of the heating stage, the cooling stage, and the economizer when the indoor air temperature is within the first predetermined temperature range and the sensed temperature of the supply air is outside of the second predetermined temperature range.