McKenney’s dramatically improved energy efficiency at a corporate campus in Atlanta, following an

HVAC system and controls retrocommissioning.

The ChallengeThe system and older pneumatic controls were not functioning properly, and as a result, occupants were uncomfortable and they were consuming too much energy. Air compressors ran constantly due to leaks, several chilled

water valves were not calibrated correctly and a variable frequency drive (VFD) on one air handling unit was running in bypass. In addition, the building owner did not have a clear understanding of occupancy schedules.

The SoluTionThe team repaired and replaced major leaks throughout the compressed air system, cutting run time in half and raising the air pressure to an acceptable level. Leaking

chilled water valves were fixed, faulty VFD wiring was repaired and pneumatic controls, stats and sensors were recalibrated. The team also set controls to shut down areas of the building that did not need 24/7 conditioning.

The ReSulTSThe building is consuming 20 percent less energy—saving the company $120,000 annually—and attaining a projected two year payback in just twelve months.

Retrocommissioning Gets ResultsPRojeCT name

� International Communications Company Corporate Campus Retrocommissioning

PRojeCT loCaTion

� Atlanta, Georgia

PRojeCT Team

� Owner: Communications Company

� Contractor: McKenney’s, Inc.

SPeCializaTionS

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Energy Management

maRkeTS

� Corporate Campuses

The content of this document is not intended as an endorsement.

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