Using chilled water to cool a building or process is efficient and flexible. A two-inch Schedule 40 pipe of chilled water can supply as much comfort cooling as 42" diameter round air duct. The use of chillers allows the design engineer to produce chilled water in a central building location or even on the roof and distribute the water economically and without the use of large duct shafts. | Application Guide AG 31-003-1 Chiller Plant Design Elevation Difference Column Height When Pump Is Off Ul 1 2002 McQuay International Table of Contents Using This Basic Chiller Piping Pumping Cooling Tower Load Control Valve Loop Control Piping Water Temperatures and Supply Air Chilled Water Temperature Condenser Water Temperature Temperature Range Air and Evaporatively Cooled Air-Cooled Evaporatively Cooled Dual Compressor and VFD Dual Compressor VFD System Design Mechanical Room Standard Standard Single Chiller Basic Basic Single Chiller Sequence of Parallel Chiller Basic Basic Parallel Chiller Sequence of Series Basic Basic Series Chillers Sequence of Series Counterflow Using VFD Chillers in Series System Primary Secondary 2 Application Guide AG 31-003-1 Basic Basic Very Large Chiller Primary Secondary Sequence of Water-Side Free Direct Waterside Free Parallel Waterside Free Series Waterside Free Waterside Free Cooling Design Cooling Tower Waterside Free Cooling Sequence of Economizers and Energy Hybrid Heat Recovery and Templifiers .67 Load Heat Recovery Templifiers .71 ASHRAE Standard Variable Primary Flow Basic Basic Variable Primary Flow Sequence of Training and Low Delta T Low Delta T Low Delta T Syndrome .