A Subcommittee of the Advanced Technology Committee of the Western HVAC Performance Alliance ℠ Subcommittee Meeting 9:30am – 12:30pm (PST) April 18, 2011.
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Slide 1
a Subcommittee of the Advanced Technology Committee of the
Western HVAC Performance Alliance Subcommittee Meeting 9:30am
12:30pm (PST) April 18, 2011 Call-in: 712/432-0075 742911# weblink
at: http://uc-d.na4.acrobat.com/wcec/ Onboard/In-Field Fault
Detection and Diagnostics
Slide 2
Committee Members Abdullah Ahmed, Sempra Anthony Hernandez, SCE
Brent Eubanks, Taylor Eng. Chris Scruton, CEC Dale Rossi, FDSI Dale
Gustavson, BBI Derek Johnson, Pacific Controls Dick Lord, Carrier
Jerine Ahmed, SCE Jonathan Douglas, Lennox KC Spivey, PG&E
Kristin Heinemeier, WCEC Mark Cherniack, NBI Matt Tyler, PECI Mike
Brambley, PNNL Nathan Taylor, Sempra Sean Gouw, SCE Sherry Hu,
PG&E Vance Payne, NIST Glenn Hourahan, ACCA Warren Lupson, AHRI
2
Slide 3
3 GapsApproaches to Overcome Tool Availability3 rd Party Tools
licensable or acquirable; OEMs have some capabilities Perception of
CostAnalysis shows it is cost effective Faults May Not be Addressed
Research: Understanding Maintenance Behavior Standards Need to be
National Reach out to ASHRAE 90.1, 189, 32; DOE/CBEA No Method of
TestSCE Method of Test, ASHRAE Std. Method of Test, DOE Method of
Test? Data on IncidenceNeed a research study No Defined Levels for
Detection Develop levels: ASHRAE Std.
Slide 4
>>Agenda 4 9:30Roll call, review of agenda 9:35Update on
Proposal for Title 24 10:15Method of Test Development: Acceptance
Tests 10:45Update on National Efforts ASHRAE, DOE/CBEA 11:15Demo of
FDSI FDD Tool 12:15Next Steps 12:30Adjournment
Slide 5
Proposal for Incorporating FDD in T24 IOUs (via CASE HMG/PECI)
and PIER (via NBI/WCEC) are working together to develop a proposed
new requirement. Informal Workshops held in April and December 2010
Roundtable on FDD held in July 2010 Discussion at AFDD Subcommittee
in December 2010 Discussion at AFDD Subcommittee in January 2011
PIER Report Draft in February 2011 Discussion at AFDD Subcommittee
in March 2011 PIER Critical Project Review March 2011 Workshop
April 8, 2011 Workshop April 27, 2011 Formal 45 day language
workshops in Apr-Jul 2011 Adoption March 1, 2012 Effective January
1, 2014 5
Slide 6
4/8/2011 CA Utilities 2013 Title 24 Stakeholder Meeting for
Proposed Code Changes 6 HVAC Controls & Economizing Code Change
Proposal 5: FDD Currently a compliance credit in the performance
calculation method Not required by Title 24 Credit toward complying
with energy budget Transition to a prescriptive requirement Not
required by Title 24 Sets the basis of performance standard
Slide 7
4/8/2011 CA Utilities 2013 Title 24 Stakeholder Meeting for
Proposed Code Changes 7 HVAC Controls & Economizing Code Change
Proposal 5 SECTION 144 PRESCRIPTIVE REQUIREMENTS FOR SPACE
CONDITIONING SYSTEMS 144 (m) Fault Detection and Diagnostics (FDD)
for Packaged Direct- Expansion Units. All packaged direct-expansion
units with mechanical cooling capacity at ARI conditions greater
than or equal to 72,000 Btu/hr shall include a Fault Detection and
Diagnostics (FDD) system in accordance with NA9 Fault Detection and
Diagnostics.
Slide 8
4/8/2011 CA Utilities 2013 Title 24 Stakeholder Meeting for
Proposed Code Changes 8 HVAC Controls & Economizing Code Change
Proposal 5 Nonresidential Appendix NA9 2013 Appendix NA9 Fault
Detection and Diagnostics NA9.1 System Requirements The following
sensors should be permanently installed to monitor system operation
and the controller should have the capability of displaying the
value of each parameter: Refrigerant Pressure: Suction Line, Liquid
Line Refrigerant Temperature: Suction Line, Liquid Line Air
Relative Humidity: Outside Air, Supply Air Air Temperature: Outside
Air, Supply Air, Return Air
Slide 9
4/8/2011 CA Utilities 2013 Title 24 Stakeholder Meeting for
Proposed Code Changes 9 HVAC Controls & Economizing Code Change
Proposal 5 NA9.1 System Requirements The controller shall provide
system status by indicating the following conditions: Compressor
Enabled Free Cooling Available Economizer Enabled Heating Enabled
Mixed Air Low Limit Cycle Active The unit controller shall manually
initiate each operating mode so that the operation of compressors,
economizers, fans, and heating system can be independently tested
and verified. Faults shall be reported to a fault management
application accessible by day-to-day operating or service
personnel, or annunciated locally on zone thermostats. A
performance indicator shall be provided, which will allow tracking
of efficiency. The FDD System used shall be certified by the CEC
and verified to be installed correctly.
Slide 10
4/8/2011 CA Utilities 2013 Title 24 Stakeholder Meeting for
Proposed Code Changes 10 HVAC Controls & Economizing Code
Change Proposal 5 NA9.2 Faults to be Detected The FDD system shall
detect the following faults: 1. Air Temperature Sensor
Failure/Fault 2. Low Refrigerant Charge 3. Economizing When it
Should/Shouldnt 4. Damper Not Modulating 5. Excess Outdoor Air
Slide 11
4/8/2011 CA Utilities 2013 Title 24 Stakeholder Meeting for
Proposed Code Changes 11 HVAC Controls & Economizing Summary of
FDD Products Currently available fault detection by OEMs (matches
NA9.2 Faults to be Detected) Air temperature sensor failure/fault
Low refrigerant charge Not economizing when it should Damper not
modulating Excess outdoor air Currently available products by third
parties ClimaCheck by ClimaCheck, Inc. FDSI Synergy by Field
Diagnostics, Inc. Sensus MI, developed by Univ. Nebraska
Slide 12
4/8/2011 CA Utilities 2013 Title 24 Stakeholder Meeting for
Proposed Code Changes 12 HVAC Controls & Economizing Summary of
FDD Products Third party products currently in development SMDS by
PNNL Low cost SMDS by PNNL Low cost NILM by MIT Virtjoule by
Virtjoule, Inc.
Slide 13
4/8/2011 CA Utilities 2013 Title 24 Stakeholder Meeting for
Proposed Code Changes 13 HVAC Controls & Economizing Cost
Effectiveness LCCA for 6-ton RTU Installed cost for OEM solution is
much less than $1600 - this is cost of third party solution w/much
longer fault list Maintenance $ at 50% of expected for conservative
estimate 75% probability of detecting faults with FDD
Slide 14
Acceptance Requirements FDD system installed by HVAC system
manufacturer with factory calibration and documented testing Attach
documentation and complete certification statement Verify that
points are mapped correctly within the system No other functional
testing required FDD system field tested Functional testing per
below 14
Slide 15
15 SCE FDD Project Series Develop FDD Test Method Performance
Impacts of Common Faults (Single/Multiple) Choose and assess two
highly ranked FDD Tools Comm. 5 Ton RTU Res. 3 Ton Split Comm. 5
Ton RTU Res. 3 Ton Split Project 1: Development of an FDD Test
Method for Commercial HVAC Packaged Units Project 2: Development of
an FDD Test Method for Residential HVAC Split Systems Project 3:
Laboratory Assessment of Retrofit Fault Detection and Diagnostics
Tools on a Commercial HVAC Packaged Rooftop Unit Project 4:
Laboratory Assessment of Retrofit Fault Detection and Diagnostics
Tools on a Residential HVAC Split System Project 5: Evaluating the
Effects of Common Faults on a Commercial HVAC Packaged Rooftop Unit
Project 6: Evaluating the Effects of Common Faults on a Residential
HVAC Split System
Slide 16
16 SCE FDD Project Series Develop FDD Test Method Performance
Impacts of Common Faults (Single/Multiple) Choose and assess highly
ranked FDD Tools Comm. 5 Ton RTU Res. 3 Ton Split Comm. 5 Ton RTU
Res. 3 Ton Split Near-term Needs Establish technical advisory group
Draft/review working test method
Slide 17
Acceptance Tests/ Certification Tests Air Temperature Sensor
Failure/ Fault Low Refrigerant Charge Economizing When it Should/
Shouldnt Damper Not Modulating Excess Outdoor Air 17
Slide 18
Update on ASHRAE and DOE/CBEA Presentation to ASHRAE SSPC 90.1
Mechanical Subcommittee Presentation to TC 7.5 FDD Subcommittee
Presentation to TC 7.5 Others to Contact: SPC 189, GPC 32 CBEA/DOE
RTU Spec
http://www1.eere.energy.gov/buildings/alliances/rooftop_specification.html
18
Slide 19
Title:METHOD OF TEST FOR FAULT DETECTION AND DIAGNOSTICS IN
UNITARY AIR-CONDITIONING SYSTEMS Purpose:This standard provides a
method of test for the performance of Fault Detection and
Diagnostic (FDD) tools on commercial unitary equipment in the
laboratory. The objective is to provide a method of test to define
an FDD tools function. Scope: 2.1 This standard applies to unitary
air conditioning systems. 2. 2 The test is a physical laboratory
test on a particular combination of diagnostic tool and make and
model of unitary system. 2.3 This standard applies to any on-board,
after-market or hand-held functionality that detects and/or
diagnoses problems that lead to degraded energy efficiency or
capacity, increased maintenance costs, or shortened equipment life.
2.4 This standard provides a method of test to define an FDD tools
function, not to specify how it should be implemented. 19
Slide 20
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Slide 21
Demo of FDSIs FDD Tool 21
Slide 22
>>Next Steps Working Groups? Detailed review of HTSDA and
related Action Items Develop strategy and recommendations for
action and advocacy for Roadmap integration Next meeting: Week of
May 30 (3-hour webinar) 22