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    • Bureaucratic Affairs Building HHW System Logic Exercise
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    • 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
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      • Logic Diagram Example - Discharge Air
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      • Logic Diagram Example - VAV AHU
    • 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
    • CW Pump Deadheaded by Tower Lift
    • 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
      • 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
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        • EBCx Workshop Series 18
      • Portland General Electric
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        • U of W Archive
    • On Demand Training >
      • Benchmarking UCA and Scoping
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      • Induction Motor Principles
      • Introduction to Functional Testing
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Pacific Energy Center

Maria System Diagram Follow-up Information
Light Control Logic
Davis Hall Logic Exercise Files
Yassen Web Meeting Videos
Austin Web Meeting Video
 

Follow-up Materials for Maria

pec_system_diagrams.zip
File Size: 5140 kb
File Type: zip
Download File

The various versions of the PEC Chilled Glycol System Diagram that I have done are in this zip file.  I also included the other PEC systems I have done a system diagram for just so you have them.
davis_hall_system_diagrams.zip
File Size: 966 kb
File Type: zip
Download File

This zip file contains the Davis Hall CW and CHW system diagrams.  The CW "Teaching Version" diagram is the diagram with the temperature sensor in the wrong place and before the recommended valve replacements were made
intro_to_control_cx_v3.pptx
File Size: 34155 kb
File Type: pptx
Download File

This is the presentation with the slides that show how a number of issues with the Davis Hall CW system became apparent just by drawing the system diagram.
back_flow_preventer.dwg
File Size: 19 kb
File Type: dwg
Download File

This is the AutoCAD RPBFP symbol that I mentioned.
s01_-_pipe_valves_fittings_v5.pptx
File Size: 29707 kb
File Type: pptx
Download File

2-way_butterfly_valve_on_pallet_02_with_tag.jpg
File Size: 1852 kb
File Type: jpg
Download File

This PowerPoint has a number of pictures of check valves (slides 27-30) and also of a butterfly valve with the disc exposed (slide 20).  The image file is a picture of a pallet with a NO and NC butterfly control valve where you can see the butterfly valve discs in both extreme positions.
cw_pump_coupling_-_guard_on.png
File Size: 1960 kb
File Type: png
Download File

cw_pump_coupling_-_guard_off.png
File Size: 2637 kb
File Type: png
Download File

pump_coupling.jpg
File Size: 1913 kb
File Type: jpg
Download File

flyer.pdf
File Size: 426 kb
File Type: pdf
Download File

These files should give you a pretty good sense of what a pump coupling is like.
 

Davis Hall Logic Exercise Materials

davis_hall_cw_mains_v4_suv8.zip
File Size: 9405 kb
File Type: zip
Download File

This is the current version of the model behind the exercise.
system_diagrams.zip
File Size: 3272 kb
File Type: zip
Download File

This zip file contains my system diagram, the contract document system diagram, and the contract document mechanical plan.  One of the things I do in the exercise is contrast those three documents, which (hopefully) reveals some of the benefits of the system diagram approach we teach. 

​Note that my system diagram shows the controlling sensor on the wrong side of the tee.   That is actually how it was being put in and one of the points I make is that developing and field verifying the system diagram helped us find that issue and correct it in a timely fashion.  
davis_hall_cw_system_v4.xlsm
File Size: 3341 kb
File Type: xlsm
Download File

cooling_tower_with_two_spd_fan_and_bypass_valve_v6a.xlsm
File Size: 1711 kb
File Type: xlsm
Download File

These Excel files are versions of the logic diagram tool with cooling tower fan control logic in them.  The davis_hall_cw_system_v4.xlsm file is specific to the exercise and shows the solution with a single control loop (which has the lag problem) and the solution to that, involving two loops with coordinated set points and the requirement for relative calibration.

The other file is what the logic looks like for a cooling tower fan with a two speed motor, which captures a lot of the savings you can achieve with a VFD but introduces some safety interlock requirements to prevent tearing up the drive system when you change from high to low speed. 

The relevancy is that in existing buildings, you will find this approach in place because that is how we did it before VFDs were as affordable as they are today.  You may not be able to justify adding a VFD because the two speed approach captures much of the savings.   But if the control tech providing a control system upgrade to DDC tried to control the two speed starter like a VFD, they could get in trouble.
 

Light Control Logic Exercise Materials

controlling_a_light_v2.xlsm
File Size: 1990 kb
File Type: xlsm
Download File

This is the logic diagram tool with lighting control logic including a couple of ways to show a simple on-off light switch, a couple of ways to show a three-way switch, and a couple of ways to show a dimmer.
three-way_switch.pptx
File Size: 264 kb
File Type: pptx
Download File

dimming_lumens_vs._power_v2.xlsx
File Size: 124 kb
File Type: xlsx
Download File

These are files that I use to support the light switch dimming exercise.  The PowerPoint is the physical wiring for different lighting circuits in ladder diagram format.  The spreadsheet is the data behind the charts embedded in the logic diagrams that do a curve fit to create a linear lighting level increase. 
 
 

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