ACCO designed and built two 600-ton central plants connected by an underground chilled water distribution system. The first phase consisted of a central plant with four evaporative cooled screw chillers. This served stages 4, 5, 9, 10, and various support buildings.

Stages 9 and 10 were converted from DX package units to chilled water air handlers. Design build cooling systems allows operation below the NC20 level. A four-story office/support building was connected to the cooling loop.

Phase II included a second 600-ton central plant consisting of a centrifugal chiller/cooling tower and variable speed drive pumping was connected to the distribution loop. This cross connecting adds significant diversity to the system. Sound stages 3 and 4 were converted to "silent-air", including an innovative retrofit of DX packages to chilled water. Performance below NC20 was confirmed.

ACCO designed, installed, and commissioned an extensive Automated Logic Controls DDC control system. CBS electricians worked on the installation. This gives CBS a valuable tool for centralized monitoring and control of critical HVAC systems.

Project Team

• Owner - CBS
• Architect - Bastien & Associates
• Mechanical Contractor - ACCO Engineered Systems