Engineered Systems - June 2008 - (Page 14)

Back 2 Basics Based on Cx-3 ATC/FPT software BY HOWARD MCKEW, P.E., C.P.E. Engi Eng neering n the Engineering in the Warranty Ph n Phase • The design engineer shou d continue to monitor the project during The h engineer should ee houl o project duri ect ec during i by contractor the warranty phase by requesting the HVAC service contractor (who ntr t is providing remote monitoring of space temperature, safeties, and alarms) to e-mail system trending data to confirm basis of design compliance and report back to the client. • The design engineer should make a point of calling the HVAC service contractor on a design day (heating season and cooling season) to confirm system performance. • Enhance the standard office specifications to reflect today’s business tools when addressing energy management capabilities in the design phase. The design engineer needs to work closely with the client to determine what metering and control components are required for the HVAC service contractor to efficiently and effectively do his job. • The design engineer should also be copied on monthly utility bills to monitor energy consumption especially if the LEED® Measurement & Verification Plan credit is to be successfully achieved. If energy simulation software is used for determining the optimum system selection and/or for life-cycle analysis, forward this monthby-month energy consumption data to the HVAC service contractor to be used to benchmark trending data during the warranty phase of the project. This simulation exercise can be used to confirm and obtain two to eight LEED credit points based on computer output. • Like any quality process, data collection and data analysis are the foundation of peak facility management as it relates to energy consumption, operating cost, and maximizing useful equipment service life. Using graphical presentations to illustrate BAS trending can be invaluable to the building owner seeking an efficient HVAC system. A picture is worth a 1,000 words, and a BAS computer graph can be worth even more. • The design engineer should monitor the collection of O&M documents per the contract specification to ensure there will be a PM workorder system in place, and for workorders completed during the warranty phase. contractor can avoid this problem. contractor can avoid this pr ntract t ctor void his m. m. B2B discussi abou • Refer to th Ma 2008 B2B discussion about operator handbooks. Refer to the May e 2B discussion about is o or r Once system dem nstration is completed each syste should have system system demo tratio i completed, m demonstration tratio t mp d yste tem a copy of the associated handbook posted at the equipment and/or located within equipment room. • The TAB engineer will include all actual-to-design flow and pressure, pressure drop, and temperature in the TAB documentation when testing, adjusting, and balancing an air-handling system. Once completed and this flow diagram and TAB documentation is accepted by the design engineer, it should be laminated and placed within the operator’s handbook. • Whether the project is to be LEED-certified or not, a 10-month meeting should be held between the commissioning engineer, the TAB engineers, building owner, and the HVAC service contractor to review the commissioning process, corrective action log, owner’s project requirements, OPR, BofD, warranty issues, trending data, and PM workorders. In addition, there should be a lessons-learned discussion for everyone’s benefit in preparation for future construction projects. Log on to www.buildingsmartsoftware.com for the complete Commissioning 1-2-3 process and also refer to “HVACR Designer Tips” for the equipment startup checklist and the “Application Checklist” for the system selection scorecard. “Back2Basics” is now available electronically and in CD-ROM format! To order an individual series or the entire collection of “Back2Basics,” go to www.esmagazine.com. Back 2 Basics The Back2Basics library has grown. grown Series 28 — 37 are now available. Or if you are missing a few series of “Back2Basics,” copies are available by contacting Jill DeVries at BNP Media, 248-244-1726 or by e-mail at devriesj@ bnpmedia.com. You can also order “Back2Basics” at www.esmagazine.com. Series 031-037 (Tests 182-202): . . $69.95 Series 001-008 (Tests 001-048): . . $59.95 Series 001-014 (Tests 001-084): . $104.95 Series 001-018 (Tests 001-108):. . $129.95 Series 001-030 (Tests 001-181):. . $209.95 Series 001-037 (Tests 001-202): . $269.95 Third-Party Cx and TAB Engineering in the Warranty Phase • The commissioning team during the warranty phase is the same team who participated in the construction phase. In the warranty phase, there will be a requirement for observing the deferred seasonal FPT demonstration (e.g., heating system demonstrated in the heating season). Pertinent trending data will be invaluable leading up to this deferred test demonstration. Trending can document that the system is functional as designed before the commissioning team arrives. If the trends show routine problems resulting in a corrective action log, the commissioning team should not waste time observing a system FPT demonstration, especially if the system will require re-testing. • Re-testing should be avoided at all costs, due to the issue that will arise as to who will reimburse the commissioning teams for this additional service. Inserting, in the Division 18000 commissioning specification, the requirement that the contractor complete a dry-run FPT demonstration using the commissioning engineerfurnished FPT checklist and subsequent signoff of the results by the 14 En gi neer ed S y stem s June 2008 http://www.buildingsmartsoftware.com http://www.esmagazine.com http://www.esmagazine.com

Table of Contents Feed for the Digital Edition of Engineered Systems - June 2008

Engineered Systems - June 2008 Contents Editor’s Note Letters To The Editor Back2Basics HVAC Challenge Case In Point Commissioning Efficiency Incentives HydroTech Building Automation Energy Wiz HVACR Designer Tips Notre Dame Tackles the Heat State Of The Arts Time For A Transplant? Project Delivery: What Can IPD Do For You? Issues & Events Computers & Software Products Application Checklist Glossary Classifieds Advertiser Index Tomorrow’s Engineer

Engineered Systems - June 2008

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