National Conference on Building Commissioning: May 3-5, 2000 Pratt et al: Field Results from Application of the Outdoor-Air/Economizer Diagnostician… 1 Field Results from Application of the Outdoor- Air/Economizer Diagnostician for Commissioning and O&M Rob Pratt Pacific Northwest National Laboratory 1 Srinivas Katipamula ENRON Corp. Michael R. Brambley Pacific Northwest National Laboratory Steven L. Blanc Pacific Gas & Electric Synopsis This paper presents results of field testing an automated diagnostician for outdoor-air-supply and economizer systems that can be used for commissioning purposes. The fundamental capabilities of the tool are described and key results of its application on six air handlers in a large hotel building are discussed. Ancillary issues pertinent to the development and application of such tools are also presented. About the Authors Rob Pratt is a Staff Scientist at Pacific Northwest National Laboratory (PNNL). Mr. Pratt served as the engineering lead for the team that developed the Whole-Building Energy-Performance Diagnostician (WBD). He has many years of experience in collection and analysis of metered energy-consumption data for commercial buildings. Srinivas Katipamula, Ph.D., was a Senior Research Scientist at PNNL before joining Enron Energy Services as the Manager of the Performance Management Center in April 2000. He was a key member of the team that developed and tested automated diagnostic tools for buildings. Before coming to PNNL, he competed a Ph.D. at Texas A&M, while working with the Texas LoanSTAR Program. Michael Brambley, Ph.D., is a Staff Scientist at PNNL in Richland, Washington, where he leads an initiative in Intelligent Building Systems. He is an active member of the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) and has served on numerous professional and project advisory committees. 1 Pacific Northwest National Laboratory is operated for the U.S. Department of Energy by Battelle Memorial Institute.