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  • Home
    • What's New
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  • SketchUp Models
    • SketchUp Resources
    • Bureaucratic Affairs Building HHW System Logic Exercise
    • Bureaucratic Affairs Building Scavenger Hunt
    • Chilled Water Plant System Diagram Exercise
    • The HIjend Hotel >
      • Chilled Water Plant Scoping Exercise
      • Ballroom AHU Scoping Exercise
      • Cooling Tower Scoping Exercise
  • Tools
    • Altitude Correction Factor
    • Economizer Evaluation Checklist
    • Eikon for Educators and WindLGC
    • Effective Duct Length Tool
    • Excel Third Axis Tool
    • Excel Time Value Conversion
    • Insulation Savings Tools
    • Logic Diagram Tool
    • Mixed Air Calculations
    • Monitoring Plan Spreadsheet
    • Pipe Friction Chart
    • Plot Digitizer >
      • Plot Digitizer Pump Curve Example
    • Square Law Spreadsheet
    • System Diagram Symbols
    • Thermodynamic Diagrams Spreadsheet
    • Universal Translator Data Analysis Tool
    • y = (m * x) + b Spreadsheet
  • Useful Formulas
    • Affinity Laws
    • Circular Equivalent Duct
    • Effective Duct Length
    • FT Guide Appendix C
    • HVAC Equations and Concepts
    • Hydraulic Diameter
    • Pump Power and Energy
    • "Square Law"
  • What's That Thing?
    • Cooling Towers
    • Pumps
    • Valves
  • Resources
    • Bill Coad's Writings
    • Data Logging Resources
    • EBCx Skills Guidebook
    • Energy Design Resources
    • Fisher Controls Valve Cavitation Bulletin
    • Functional Testing Guide
    • Honeywell Gray Manual
    • MCC Powers Bulletins
    • NBCIP Reports
    • PEC Tool Lending Library
    • PID Resources
    • Pneumatic Control Resources
    • Resource List
    • Scoping Resources
    • TAB Resources
    • Vintage Carrier Design Manual
    • VRF Systems
    • Williams' Wisdom
  • Videos
    • Bureaucratic Affairs HHW Logic Answers
    • Cooling Tower Flow Variation
    • Economizer Stratification
    • Functional Testing
    • Induction Principles
    • Monitoring Plans
    • Ripple Effects
    • Testing a Pump
    • The Garden of Low Entropy
    • Variable Flow Systems
  • Training
    • Materials from Classes and Presentations >
      • ACEEE
      • ASHRAE
      • ASHRAE - Engineers Notebook
      • BCxA and NCBC
      • BEST Institute
      • Case Studies
      • ERDC 2020 RCx Academy
      • ELPNW
      • ICEBO
      • Marriott AEP
      • Magazine Articles
      • NAVFAC
      • Pacific Energy Center Design, Performance and Commissioning Issues Classes >
        • PEC Class Materials Archive
      • Pacific Energy Center EBCx Project Review
      • Pacific Energy Center EBCx Workshop Series >
        • EBCx Workshop Series 12
        • EBCx Workshop Series 13
        • EBCx Workshop Series 14
        • EBCx Workshop Series 15 >
          • Student One On One Discussions
        • EBCx Workshop Series 16
        • EBCx Workshop Series 17
      • Portland General Electric
      • U of W >
        • U of W Archive
    • On Demand Training >
      • Benchmarking UCA and Scoping
      • Loads and Psychrometrics
      • Induction Motor Principles
      • Introduction to Functional Testing
      • Scope of Work Documents
      • System Diagraming
    • Training Opportunities
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Bureaucratic Affairs Building Hot Water System Logic Exercise Answers

The videos on this page are intended to supplement the answers provided for the Bureaucratic Affairs Building Heating Hot Water System Logic Exercise.  More specifically, the answers to the exercise in the form of logic diagrams, a narrative sequence, and a point list have been provided previously.  In the informal videos on this page, I walk you through the logic diagrams and explain how the logic works and also point you at resources that you might find useful to support your understanding of the exercise.  
You should be able to download all of the videos if you prefer rather than watching them online.

​In this first video, I provide an overview of the exercise and review where the resources you need to do it are located.  It also includes an initial look at the revised logic that includes the reset schedule and a few other enhancements.

​In the second video, I go over the basic enhancements that can be made to the way the heat exchanger is controlled, including using a reset schedule.   The enhancements save energy, and in the case of the reset schedule improve comfort. And they will be relatively low cost/no cost improvements
The reason they will be low cost/no cost  is that they can be achieved simply by modifying the system programming.  This assumes that there already is an outdoor air temperature sensor or that data can be procured from the system somehow.  But even if that sensor needed to be added, the cost would be modest.

If the operating team (or you as the commissioning provider) were familiar with how to program the system, the cost of the making the change would be insignificant.  But even if you needed to have a control technician make the change, the cost would be modest, especially if the Owner had a service agreement in place that covered making minor modifications to the software in the system.

But key to success would be your ability to communicate what needed to be changed.  And logic diagrams are a powerful tool for accomplishing that.

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