A complete conversion of the existing 1984 installed system including the removal of (2) 1200 ton centrifugal chillers and replaced with (2) York 1200 ton state of the art chillers whereby the machines had to be split, rigged and re-assembled 3 stories underground. This along with a new 1 meg generator, storm proof fuel oil system and new BMS system, brought the building additional mechanical re-assurance.