Presentation on theme: "COMMISSIONING HVAC CONTROLS"— Presentation transcript:
1COMMISSIONING HVAC CONTROLS Considerations and Toolsfor Simple and Complex SystemsJim Magee, CxA, EMP, LEED-AP BD+CFacility Commissioning Group
2AIA Continuing Education Course The Associated Air Balance Council (AABC) is a Registered Provider with The American Institute of Architects Continuing Education System (AIA/CES). Credit(s) earned on completion of this program will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.This program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material or construction or any method or manner of handling, using, distributing, or dealing with any material or product.Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
3Course DescriptionThis 1-hour HVAC Commissioning Seminar Presentation will cover the commissioning process as described in the ACG Commissioning Guideline, as well as valuable practical insight on skills, strategies, and communication and documentation protocols essential to applying the process on “real-world” HVAC controls projects.
4Learning Objectives At the end of this program, participants will be able to: Explain the purpose, methodology, and benefits of the commissioning process as it relates to HVAC controls.Identify and distinguish between the five phases of commissioning – (1) Pre-Design, (2) Design, (3) Construction, (4) Acceptance, and (5) Post-Acceptance – and the activities carried out in each of them.Describe the documentation and deliverables that are essential to the delivery of quality HVAC controls commissioning services.Identify the roles and responsibilities of all commissioning team members within the HVAC controls commissioning process, with particular emphasis on the role of the commissioning provider.
6Commissioning Process A process of documentation, adjustment, testing, verification, and training, performed specifically to ensure that the finished facility operates in accordance with the owner’s documented project requirements and the construction documents. It begins in pre-design and continues through design, construction, and the life of the facility. (BCA draft document, 2004.)
7What is Commissioning? (validates the “design”!) Commissioning “retro” ; “re”; or “ongoing”CxCommissioningCommissioningvalidates the design!That the design works and meets the “design intent”DesignIntentDesignConstructionO & MKenigChanging Needs“Inspections” validate constructionThat the construction is installed correctly per the “design”This is not commissioning!
8Commissioning Process Design Intent DocumentDetails functional requirements and Owner’s expectations of how a building will be used and operated - OWNER’S PROJECT REQUIREMENTSBasis for building commissioningBasis of DesignThe concepts, calculations, decisions, and product selections used to meet the OWNER’S PROJECT REQUIREMENTS
9Cx Standards and Guidelines ACG Commissioning Guideline – 2005ASHRAE Standard 202P – Public Review Period: The Commissioning Process for Buildings and SystemsASHRAE Guideline 1.1 – 2007: HVAC&R Technical Requirements for the Commissioning ProcessASHRAE Guideline : The Commissioning ProcessNECA : Recommended Practices for Commissioning Building Electrical SystemsICC Commissioning GuidelineVA Whole Building Commissioning Process Manual
10Commissioning Definitions Commissioning Authority (CxA):A person (or firm) representing the facility ownerLeader of the Commissioning TeamAuthority of Cx Process – not design or means and methodsCxA not in chain of command – preserves objectivity
12Commissioning Definitions EXISTING BUILDING COMMISSIONINGRetro-Commissioning (RetroCx):Commissioning an existing building that has never been commissionedRe-Commissioning (ReCx):Commissioning a building that has been previously commissionedContinuous Commissioning (CCx):Owner continues to collect and compare baseline data on selected building systems to ensure that the building functions optimally throughout its operating life
13HVAC Controls Cx Team Owner / Operator Architect Design Consultants Commissioning AgentConstruction Manager (or General Contractor)Mechanical ContractorElectrical ContractorTemperature Controls ContractorTest and Balance Contractor
14HVAC Controls Cx Team Equipment Vendors Specialty Trades Specialty ConsultantsProgram ManagerService Contract ProvidersBAS SpecialistsIT Support Groups
15Cx Process Deliverables Design Intent Documents (DID or OPR)Design ReviewsSubmittal ReviewsSite Observations and Site MeetingsResolution Tracking Forms (RTF’s)System Verification Checklists (SVC’s)Organized Systems Start-UpsFunctional Performance Tests (FPT's)Operation and Maintenance (O&M) trainingO&M DocumentationCommissioning ReportWarranty Review of Building Operation
16Approaches to Commissioning Comprehensive CommissioningConstruction Phase Commissioning
17Phases of Commissioning Pre-Design PhaseDesign PhaseConstruction PhaseAcceptance PhasePost-Acceptance Phase
19Independent 3rd Party Cx Avoid conflicts of interestReport directly to ownerPeer level with design consultantsUnbiased objectivityNot influenced by contractor/vendor prerogativesNot influenced by design team prerogatives
21HVAC Controls Definition The starting and stopping or modulation of HVAC systems, equipment and component assemblies to regulate the condition being changed by the process.
22Pre-Design Phase Review Owner’s Project Requirements (OPR)Design Narrative Controls DescriptionsScope of Controls SystemsProviders of Controls ProductsInstallers of Controls ProductsQuality Control Provisions of ControlsCommissioning Provisions for ControlsUser Interface RequirementsProcurement Criteria
23Design Phase Review OPR and BOD Progress Reviews Controls Specifications Progress reviewsProvisions for Testing and CommissioningOperation and Maintenance ConsiderationsIncorporate Controls into Commissioning PlanEstablish Controls Elements on Project ScheduleConformity to Owner’s Design StandardsAccess for Controls Equipment and Components
24Design Phase Review Design Sequence of Operation with Narratives Points List with Types of PointsDefine Integration Strategy: BACNET, LON, GatewaysDefine User Interactions: local, work station, campusLevel of User Interfaces: HVAC, Lighting Controls, DHW, Life Safety, Fire Alarm & Suppression, Security SystemsIndividual Space Control vs. Limited or Central ControlCode ComplianceLocal AHJ Requirements
25HVAC Controls Design HVAC Systems Basic Control Supervisory Control Optimizing ControlSources of Supply
27Basic ControlRegulates heating & cooling to maintain conditioned spaces (meet the load)Discharge temperature controllers control the rate of primary conversion (chillers or boilers)Pressure controls determine the delivery rate of flows from pumps or fans for distribution
28Supervisory Control Scheduling and Interaction of Sub-Systems Meet building needs with operator inputBuilding Automation Systems (BAS)Energy Monitoring and Control System (EMCS)Facility Management System (FMS)Energy Management System (EMS)Direct Digital Control (DDC)
29DDCEverything done by a computer or microprocessor (overly broad definition)Closed loop control of local loops by a digital computer or microprocessorEnergy management application programs are different from DDC controls and more specialized
30Optimizing ControlsControl parameters in a manner that minimizes energy and operation costsImprove efficiency of primary supply equipmentReduce loss of energy in end use systemsLoad reset, dynamic load control, warm-up/cool- down, occupied/unoccupied detection, etc.
31Sources of Supply Full-Line Control Companies Control Distributors Full-Line HVAC Equipment CompaniesSpecialized Control Companies
33Construction Phase Submittal Review of Controls Compliant with SpecificationsCompliant with Owner’s Design/Construction StandardsVerify Design Sequence of OperationVerify Means & Methods and NarrativesVerify Points ListsVerify equipment and components
34Construction Phase Submittal Review of Controls Verify Appropriate Option SelectionsConfirm Basis of Design Alternate SubmittalsVerify Compatibility of Controls with EquipmentVerify Controls Integration CapabilitiesVerify Controls Interface Capabilities
46Controls Systems Start-Up Start-Up = Installer ResponsibilityCxA Monitor Controls Start-UpPower/CommunicationsProgrammingPoint-to-Point Verification & DocumentationSafties TestingSOO Verification and Testing
47Controls System Start-Up Devices CalibrationTAB Coordination and Support ServicesControllers Range and Accuracy/ToleranceLocations of Transmitters, Sensors, Pick-UpsSchedulingLocal & Remote Communication Signals StrengthWiring ConditionsGraphics and Integration
57Writing FPT’s for HVAC Controls FPT typically for equipment or system with controls imbedded and/or separate blocksConfirm PrerequisitesOrganize in SectionsBegin with Tests to Confirm ReadinessTest Safeties First
58Writing FPT’s for HVAC Controls Do Positional Checks EarlyStart with Basic ControlsProceed LogicallyConclude with Supervisory ControlsConfirm Graphic InterfacesConfirm Integration
71HVAC Controls O&M Provisions Set Up Trends After FPT’s (while completing)Acquire VPN/Web/Modem Access to BASMonitor BAS Regularly (transient conditions)Review O&M Manuals, As-Built SOO Documents and HVAC Controls Existing Conditions Drawings
72O&M Training CxA Facilitates Installer-Provided Training DVD Record Visual and AudioSign-In SheetsAdvance Notice to Owner PersonnelDivide Training into Appropriate Intervals
73O&M Training Advocate for Owner Interests During Training Collect and Review HandoutsAgendas Required In AdvanceDID Review by DesignerManufacturer Rep per Specifications
75Warranty Period Reviews Maintain Remote Access for Periodic ReviewSpecify Periodic Controls Vendor VisitsNear End Warranty ReviewRTF/Punchlist ResolutionsCommunicate with Owner, Designers and Contractor
76Warranty Period Reviews Analyze Energy UsageReview Equipment/Components ConditionOwner/Operator ConferenceOccupant Comfort VerificationSystems Manual
77Q&A This concludes The American Institute of Architects Continuing Education Systems Course.