Cardinal Health

• Converted three-way valves to two-way values and added variable speed pumping to the chilled water and hot
water systems
• Programmed the new chilled and hot water controls to allow the main system loop to modulate down to the
minimum speed needed to maintain the water system load requirements.
• Integrated the proprietary, ill-performing controls managing the building’s HVAC system, giving United Automa-
tion access to troubleshoot and monitor it and Cardinal more flexibility in the future.
• Stabilized Clean Room temperatures to within 1° and humidity to within ±1%. Previous attempt at dehumidifica-
tion was causing additional heat in the Room and compounding occupant discomfort.
• Removed excess humidity in the Breakroom and Auditorium by replacing the controls for the air handling units
responsible for those rooms and improving the programming.
• Saved energy in the Breakroom and Auditorium by adding CO2 sensors to detect room occupancy, adding
VFDs to the supply fans serving these rooms, and designing a controls sequence that modulates the speed of
the fans to match the room requirements.