Engineered Systems - April 2008 - (Page 18)

CaseInPoint For the first time since 1969, the Dominican Sisters living at this facility have access to cold rather than lukewarm water, as well as nearly instantaneous hot water in all of their dorm rooms and the kitchen, thanks to new boilers and a hot water heater. Welcome to the greener side of the fence. It’s obvious that Carlyle compressors are green, but did you know Carlyle can help you be green in more ways than one? Carlyle compressors have an average life span of 9.9 years, nearly double that of the competition’s life span of 5.2 years. That reliability translates to a $15,000 savings per store in critical downtime, repair and replacement costs for you. Also, a more reliable compressor means less scrap waste going into the environment. And for low temperature applications Carlyle offers our Compound Cooling compressor, the most energy efficient compressor in the industry. So why not consider the option that allows you to save time, money and the environment? There’s never been a better time to go green. For more information regarding Carlyle’s reliability data and the cost savings per store, visit www.CarlyleCompressor.com. The direct venting was accomplished by running the PVC piping up through the ceiling of the basement to the main ﬂoor, into the attic, and then out above the architectural roof. The Standard team took advantage of the KNIGHT’s built-in cascading sequencer by simply wiring the two new boilers with a two wire pair and then completing the quick and easy set up of the controls and burners. Piping for the ARMOR domestic water heater and tank was simple and straightforward. The new piping was run to the existing hot and cold water pipes located in the building’s basement. Since the water softener had been piped to the heating system in the old boiler room 150 ft away, it had to be relocated and piped in next to the ARMOR. The cold water line coming into the building remained the same, but the hot water line had to be cut and isolated from the old boiler room. The lead installer for the project, Dan Sem, then converted the old hot water line, which had been cut in the tunnel leaving the center, to a hot water recirculation line for the new system by coupling the newly cut end to a three-quarter-in. PEX line and running it all the way back to the ARMOR water heater with a mini pump. A LONG WAIT FOR COLD WATER Once this isolation and recirculation line was complete, the ARMOR was ﬁred up and the new domestic hot water system was running beautifully. The Smart System control on both the KNIGHT and ARMOR made the set up of the cascade, outdoor reset, night setback, and heating and domestic water setpoints and controls a quick and painless endeavor. For the ﬁrst time since 1969, the Dominican Sisters have access to cold rather than lukewarm water, as well as nearly instantaneous hot water in all of their dorm rooms and the kitchen. The 100 gal of stored domestic hot water is now maintained at 140°, and the building’s water heating setpoint is controlled solely on the cascade modulation of the boilers and the outdoor temperature. The new system is dramatically more stable and efﬁcient than the previous system. With an investment of $65,500, the center can expect a minimum of 35% fuel savings; and with the local utility company’s 30% reimbursement, a three- to four-year payback will easily be achieved. FREE INFO: 131 18 En gi neer ed S y stem s April 2008 http://www.CarlyleCompressor.com http://www.CarlyleCompressor.com

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

Engineered Systems - April 2008 Contents Editor’s Note Back2Basics HVAC Challenge Case In Point Commissioning Building Automation Energy Wiz HVACR Designer Tips This Time, Water Cooled Was All Wet Cleanroom Design In 10 Easy Steps It's Not The Heat, It's The Humidity Issues & Events Computers and Software Products Glossary Classifieds Advertiser Index Tomorrow’s Engineer

Engineered Systems - April 2008

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