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Johnson Controls Central Plant Optimization 10Application NoteCode No. LIT-12011575Software Release 10.1Issued October 2, 2015Refer to the QuickLIT website for the most up-to-date version of this document.Introduction.5Key Concepts.5Operation Overview.5Chiller Selector Overview.5Waterside Economizer Overview.5Chilled Water Pressure Control Loop Overview.6Temperature Control Loop Overview.6Sequencing Methods Overview.7Building Load Overview.7Chiller Load Overview.7Decouple Loop Flow (Flow Differential) Overview.7Temperature Differential Overview.7Chiller Coefficient of Performance (COP) Overview.7Design.8Supported Plant Configurations.8Primary Headered Chilled Water System.8Primary Dedicated Chilled Water System.9Primary with Secondary Chilled Water System.10Condenser Water Pump Systems.11Cooling Towers.13Alternate Supported Plant Configurations.15Waterside Economizer.15Sequencing Methods.24Building Load.24Chiller Load.24Decouple Loop Flow (Flow Differential).25Temperature Differential.25Application Distribution.25Determining the Application Size.26Performance Considerations.26Subsystem Data Sharing Requirements.26Degraded Mode of Operation.42Setup and Commissioning.43Chiller Coefficient of Performance (COP).43Determining Chiller COP.43Configuring the Chiller Selector.45Device Information Table (Chiller Selector).45Sequence Table and Device Combinations.46Chiller Timers.48Sequence Table Parameters (Chiller).51Key Inputs and Parameters (Chiller).51Operational Data for Simulation and Commissioning (Chiller).54Configuring the Pump Selector.55Johnson Controls Central Plant Optimization 10 Application Note1
Pump Selector Module Timers.55Plant Pump Capacity.56Pump Selector Details.58Sequence Table Parameters (Pump Selector).59Key Inputs and Parameters (Pump).59Operational Data for Simulation and Commissioning (Pump).59Configuring the Cooling Tower Selector.60Sequence Table Parameters (Tower).61Key Inputs and Parameters (Tower).61Cooling Tower Timers.61Operational Data for Simulation and Commissioning (Tower).62Configuring the Waterside Economizer Suitability.63Waterside Economizer Sequencer.63Waterside Economizer Suitability.63Configuring the Heat Exchanger.65Sequence Table Parameters (Hx).67Key Inputs and Parameters (Hx).67Heat Exchanger Timers.68Operational Data for Simulation and Commissioning (Hx).69Pressure and Temperature Control.70Variable Speed Primary Chilled Water Minimum Flow Control.70Chilled Water Pump Differential Pressure Control.70Condenser Water Temperature Control.72Condenser Water Pressure Control.74Alarms and Interlocks.75Maintenance and Lockout Switches.75Setup, Delay, and Maintenance Switch Inputs.81Operational Data for Simulation and Commissioning (Equipment Interlock).82Sequence of Operation for Staging Chillers.82Transition from Actual to the Desired Combination.83Transition Timing.83Waterside Economizer States.92Waterside Economizer State Timing Diagram.93Transitions in Dedicated Case.93Transitions in Headered Case.94Operation and Troubleshooting.98Searching for More Efficient Combinations.98Stage Down Decision.99Stage Up Decision.99Chiller Lift Sensitivity.100Upper and Lower Optimal Percent Load Reset.102Derating a Chiller.103Troubleshooting.105Appendix: Application Inputs and Parameters.106Appendix: Creating Distributed Applications.109Creating a Distributed Application Using the Master Application.109Creating Subsystems From the Master Application.111Creating the Chiller Subsystem.111Creating the Condenser Water (Tower) Subsystem.112Creating the Primary Chill Water (PCHW) Pump Subsystem.113Creating the Condenser Water Pump Subsystem.114Application Note2
Creating a Distributed Application Using Master Preferences.116Creating Subsystems from the Master Preferences.116Setting up Communication between Controllers.121Appendix: Central Plant Optimization 30 Integration.122CPO30 Enable Control System.122CPO 30 Inputs and Outputs.122CPO30 Control Systems.124Heartbeat Control System.124Introduction.125Example: Creating an Application with a Combination of Dedicated and HeaderedPiping.
JohnsonControlsCentralPlantOptimization 10 ApplicationNote CodeNo.LIT-12011575 SoftwareRelease10.1 IssuedOctober2,2015 RefertotheQuickLITwebsiteforthemostup-to .
