Chiller Plant Retrofit
The chiller plant retrofit project included the retrofit of four industrial electric chillers (one low zone unit, two mid zone units, and one high zone unit) in addition to upgrades to controls, variable speed drives, and primary loop bypasses.
All existing pumps and steam chillers remain. For the low zone chiller, the retrofit involved the installation of: a new chiller mounted variable speed drive, a new VSD-rated compressor motor, a new IEEE Filter in VFD to reduce harmonic distortion, and a new Optiview Graphic Control Panel with latest software revision. For all other chillers, the retrofit involved the installation of: new drivelines, new evaporator and condenser water tubes, new Optiview Graphic Control Panels with the latest software revision, chiller water bypasses with two-way disk type valves, new piping in place of backwash reversing valves, new automatic isolation valves on the CHW supplies to each electric chillers, and temperature and pressure gauges on all supply and return lines. In addition, R-500 refrigerant were removed (per EPA guidelines) and replaced with R134A refrigerant. The existing steam chillers remained. All electric chillers, CW and CHW pumps, pump VFDs, and zone by-pass valves are controlled by the Metasys control system.