Engineered Systems - December 2008 - (Page 43)

www.dedietrichboilers.com Before (And After) The Flood Remember, water t t can get into fuel oil tanks. Bacteria ends up i d p growing rapidly in an oily water environment. In some cases, oil i d t can be pumped out and reconditioned with mobile equipment. If you don’t clean the oil and treat it with biocides, you will dp l end up fouling all of i ti t your oil distribution, pumping systems, and burners. tory, bricks, and mineral wool in ovens is crucial. When water goes from being a liquid to a gas (steam), it expands 1,600 times. If you don’t slowly and carefully release the water, your refractory can literally explode into pieces. This will keep you down a long time for repairs. Proper dryout may not be possible with the unit’s existing burner or burners. You might need to bring in rental burners or heaters and let them run for days. This is something you want to start as soon as possible after water damage. Pay special attention to control panels and components. Floodwaters usually contain contamination that is corrosive and may be conductive. Do not power panels that have been wet. You can end up shorting out equipment that was not previously damaged. Make sure that panels have first been properly cleaned with contact cleaners and thoroughly dried out including all electronic components. Replace all relays and critical components like burner management systems that have been submerged. The cost is not worth someone’s life. Fuel oil tanks need water removed, biocides, and cleaning. Remember, water can get into fuel oil tanks. When it does, the water makes for biological fouling since bacteria ends up growing rapidly in an oily water environment. In some cases, oil can be pumped out and reconditioned with mobile equipment. If you don’t clean the oil and treat it with biocides, you will end up fouling all of your oil distribution, pumping systems, and burners. Test all safety interlocks. You will need someone experienced to test all the safety interlocks including flame detectors, lowwater cut offs, high-temperature limits, and about a dozen other systems. As an example, our firm has proprietary checklists that contain over 100 items to check to validate safety. This is an annual code requirement that many people ignore. Check all valves for leakage. All manual and automatic fuel train valves need to be tightness tested annually. This especially needs to be done after a water contamination incident. Some valve designs are more susceptible to water damage than others. If seeking a third party to help with these, seek one with ongoing experience at conducting manufacturer and code-required bubble testing on these valves. Remove burners and check for corrosion. Some burner styles with small gas holes are susceptible to water damage and corrosion. Corrosion can occur quickly within days of an incident. These need to be cleaned and checked prior to any firing. Reset and check fuel air ratios. Fuel/ air ratio control systems come in many types and styles. In some cases, sensitive valves and controls could have been compromised. You will need to have burner flue gasses checked with a flue gas ana- As the Boiler Should Be!!! NEAR CONDENSING BOILER GT SERIES c True Eutectic Cast Iron = flexibility in the casting c Absolutely thermal shock proof!!! GUARANTEED! c +88% Thermal and Combustion Efficiency c Low NOx burners 15 to 30 ppm c T’s up to 80ºF c No minimum flow requirements c Large waterways = lower pressure drops c State of the Art Control packages c 90 PSI working pressures c Models up to 6,200 MBH c Best warranty in the industry WHEN YOU TH!NK BOILERS TH!NK Input 219 at www.esmagazine.com/instantproductinfo w w w. esmag a zin e. c o m 43 http://www.dedietrichboilers.com http://renewforfree.com http://renewforfree.com http://www.dedietrichboilers.com http://www.esmagazine.com/instantproductinfo http://www.esmagazine.com

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

Engineered Systems - December 2008 Contents Editor's Note HVAC Challenge Back2Basics Case In Point Commissioning Building Automation HVACR Designer Tips Applications Checklist Lakefront Library: Radiant Systems Meet Natural Ventilation Before (And After) The Flood Basics For Refrigerant Chillers Wire-To-Shaft Efficiency For HVAC Pumps Products Glossary Classifieds Advertiser Index Tomorrow’s Environment

Engineered Systems - December 2008

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