EBOM-v4 EAc3: Ongoing commissioning

  • A perfect fit for continuous improvement

    Ongoing commissioningThe process of verifying and documenting that a building and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the owner's project requirements. is a great option for baking continuous improvement for system and energy performance into your building operations. The credit is achieved by essentially repeating the process steps undertaken for retro-commissioning over a cycling two-year period. 

    To be successful, your ongoing commissioning program needs to go beyond preventive maintenance and system trending. Performance verification of energy efficiency measures implemented under EAc2 is also not sufficient on its own to meet the credit requirements. Instead, the ongoing commissioning work must include device checks, sensor checks, functional testing of equipment, alarm testing, point trending, and metering.

    What’s New in LEED v4

    • Nothing new!

    Readiness Review Questions

    • Do you have a complex building that warrants ongoing monitoring and proactive testing of energy systems performance? 

    • When was the building last commissioned or audited? Have any major systems been upgraded or altered since that process was completed? 

    • Is a BAS with direct digital controls (DDC) available to assist with some of the data collection and monitoring activities?

    FAQs 

    We have over 500 VAV boxes in our building. Do we have complete testing for each one every two years?

    The LEED Reference Guide states that sampling is permitted for substantially similar systems, but the minimum rate should be 10 or 10%, whichever is greater. Additionally, a different sample of units or equipment should be tested every two years when sampling is applied.

  • EA Credit 3: Ongoing commissioning

    Intent

    To use the existing building commissioningThe process of verifying and documenting that a building and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the owner's project requirements. process to improve building operations, energy, and resource efficiency.

    Requirements

    Establishment

    Meet the requirements of EA Credit Existing Building Commissioning–Analysis and EA Credit Existing Building Commissioning–Implementation.

    Establish an ongoing commissioning process that includes planning, point monitoring, system testing, performance verification, corrective action response, ongoing measurement, and documentation to proactively address operating problems in the systems being commissioned.

    Develop an on-going commissioning plan that defines the following:

    • roles and responsibilities;
    • measurement requirements (meters, points, metering systems, data access);
    • the points to be tracked, with frequency and duration for trend monitoring;
    • the limits of acceptable values for tracked points and metered values;
    • the review process that will be used to evaluate performance;
    • an action plan for identifying and correcting operational errors and deficiencies
    • planning for repairs needed to maintain performance;
    • the frequency of analyses in the first year (at least quarterly); and
    • the subsequent analysis cycle (at least every 24 months).

    Performance

    Apply the requirements below to all direct energy-consuming or energy-producing systems, including lighting, process loads, HVAC&R, domestic water heating, and renewable energy.

    • Update the systems manual with any modifications or new settings, and give the reason for any modifications from the original design. Define methods for improving operations and maintenance.
    • Include quarterly reports during the first year of implementation and annual reports on the performance of building systems.

    Continue to update the facility’s operating and maintenance plan and current facilities requirementsThe implementation of the owner's project requirements, developed to confirm the owner's current operational needs and requirements. to reflect actual conditions and issue annual revisions of these documents.

    Only activities associated with ongoing commissioning completed within two years of the LEED application may be included to show progress.

LEED v4 O+M:EB Platinum Office

Complete documentation for achievement of EAc - Ongoing commissioningThe process of verifying and documenting that a building and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the owner's project requirements. on the LEED v4 O+M:EB Platinum StopWaste.org headquarters office building at 1537 Webster Street, Oakland, CA. Project documentation was shared with LEEDuser through cooperation with that organization, and the LEED consultant, BuildingWise LLC

2 Comments

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Walker Johnson
Feb 27 2017
LEEDuser Member

Frequency of Analysis

This credit states that the frequency of analysis should be at least quarterly in the first year. It doesn't state what specific analysis should be done though. Does anyone have guidance on this? I'm assuming functional performance tests only need to happen every 2 years.

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Paul Swierc Commissioning Engineer, YR&G Jun 07 2017 LEEDuser Expert 73 Thumbs Up

Walker,

Presuming you're referencing Step 5 of the Step-by-Step Guidance section for this credit in the Reference Guide, the language there is a little more specific. The first point states that Cx1. Commissioning (Cx) is the process of verifying and documenting that a building and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the owner's project requirements. 2. The process of checking the performance of a building against the owner's goals during design, construction, and occupancy. At a minimum, mechanical and electrical equipment are tested, although much more extensive testing may also be included. activities must occur at least quarterly, regardless of the year since operations began. Point two specifies that reports should be filed on a quarterly basis during the first year and on an annual basis thereafter. Additionally, the Ongoing CommissioningThe process of verifying and documenting that a building and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the owner's project requirements. Schedule Example in the Further Explanation section shows commissioning activities scheduled quarterly, ensuring that all CxCommissioning: the process of verifying and documenting that a building and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the owner's project requirements. tasks be completed within a two-year cycle.

My interpretation here is that to achieve this credit, commissioning activities need to be completed quarterly throughout occupancy. In the first year of operations, the team completing these activities should file quarterly reports of their findings. Afterward, reporting frequency may be reduced to once per year.

The exact activities and analyses to perform each quarter will vary upon the systems and requirements of the facility. Testing functional performance is obviously a major component, but the analyses can also include calibrating sensors and devices, trending metered points and ensuring they fall within acceptable parameters, and analyzing utility consumption data. Creating a detailed Ongoing Commissioning Plan that specifies roles and responsibilities, activities and tasks, and frequency is vital to the success of implementing this process.

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Aug 22 2017
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