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The existing 3,100-ton primary
loop, chilled water central plant was replaced with a
2,700-ton de-coupled plant with expansion capability to
3,400 tons. Replacement of chillers was carried out in
phases to keep all existing air handlers and chilled water
computer room units in continuous operation.
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New multiple chilled water
risers with cross-connections for redundant, reliable
cooling.
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"Side-car" plate and frame heat
exchanger allows expanded use of water side economizer.
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30,000-gallon condenser water
make-up storage tank with on-site well insure adequate
cooling tower operation when municipal water supply is
interrupted.
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New 1000 kW electric steam
boiler provides economical source of humidification during
winter months. New steam risers installed to replace aging
distribution system.
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Typical projects include
installation of multiple, modular airhandlers in the 25 to
50 ton range, with steam humidification, variable speed
supply fans and digital controls.
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Data center areas are served by
chilled water computer room units with under floor piping
located in containment dikes with leak monitoring.
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Back-up generators are served by
three 25,000-gallon underground diesel storage tanks with
continuous monitoring system.
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The fire pump was replaced with
the new fire pump serving the standpipes and the double
interlocked, preaction dry-pipe sprinkler system.
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DDC panels monitor and control
the central plant and the more than 45 air handlers
throughout the building. The DDC system is powered by the
UPS and provides alarm outputs to the remote monitoring
facility.
