Engineered Systems - December 2008 - (Page 41)

www.dedietrichboilers.com Before (And After) The Flood In many cases, existing equipment does not meet current codes. In some cases, state laws require that when substantial repairs are made, the entire pieces of equipment must become p code-compliant. This could add ud considerably to the complexity and k f works scope of trying to get your service restored. other cases, you might want to consider fuel connections for propane or propane air mix systems to simulate natural gas. Consider the availability of components used in the fuel train and control systems. Try and use common readily available components. Specialty items that are from obscure manufacturers should be avoided. If you’re not in this business, you might not know who the popular players are. We recommend getting informed advice about this for your particular situation ahead of time. Have all documentation in order, including control and electrical drawings, lists of components, and setpoints for controls. There will be people trying to scramble and get you back into service. They do not want to be burdened by trying to figure out wiring. Setpoints of control components will be needed to readjust new components. Please also keep in mind that you may be forced into full code compliance on old systems when replacing critical components. In many cases, existing equipment does not meet current codes. In some cases, state laws require that when substantial repairs are made, the entire pieces of equipment must become code-compliant. This could add considerably to the complexity and works scope of trying to get your service restored. DRY OUT AND INSPECTION, TESTING, AND RECOMMISSIONING And here are the ten tasks for getting back up to speed safely in the wake of an event. • Check vent lines and regulators for water incursion. • Remember that refractory dry out is critical. • Pay special attention to control panels and components. • Fuel oil tanks need water removal, biocides, and cleaning. • Test all safety interlocks. • Check all valves for leakage. • Remove burners and check for corrosion. • Reset and check fuel air ratios. • Check and clean combustion air fans. • Have procedures in place for emergency response when an event may be imminent. Check vent lines and regulators for water incursion. Regulators and pressure switches have vent openings. These are supposed to be routed outside. Having a vent line usually means water will be kept out. If there is no vent line, then water can easily enter the regulator diaphragm and/or the pressure switch. Water and the contamination it brings can render this equipment unsafe. Even vent lines that run outside could have been contaminated from outside and inside. Unscrew these and check them for water. Remember that refractory dry out is critical. All fired equipment has some type of refractory. Drying out castable refrac- As the Boiler Should Be!!! CONDENSING BOILER GAS 310 ECO c Cast Aluminum Heat Exchanger c 99% Thermal and Combustion Efficiency c High turn down c Low NOx 15 to 30 ppm c T’s up to 81ºF c No minimum return temperature c Large waterways = lower pressure drops c Extreme low operating noise <60dBa c Plug and Play installation c 100 PSI working pressure c Models up to 2,000 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 zine . c o m 41 http://www.dedietrichboilers.com http://subscribeforfree.com http://subscribeforfree.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

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.