HVACP

WIN 2017/18

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for redundancy and peak efficiency operation assurance of the entire system by modulating down the fans' speeds. By allowing the controls to lower set-points based on outside conditions, the mechanical equipment operates more energy efficiently. Also, tower fan speeds are programmed to ensure limited and equal wear. Reduced rpm means less wear on motors, belts and bearings. "Now we know that our ultimate mandate — no downtime — is as close to a full guarantee as we can make it," concluded Lehigh. CHECK OR CIRCLE #152 cooling towers/ case study Download the award-winning Toolbox Technician ® app, which features the effi ciency calculator, conversion tools, motor interchange module and retrofi t audit sheet. your equipment were reliable while effi ciently moving more air? Regal, Browning, Century, Fasco, Genteq, Marathon, Morrill Motors, Sealmaster and Toolbox Technician are trademarks of Regal Beloit Corporation or one of its affi liated companies. © 2017 Regal Beloit Corporation, All Rights Reserved. MCAD17078E • MB0049E www.RegalBeloit.com Creating a better tomorrow™... Well, it will be when you use the innovative brands of Regal... Providing you with exclusive products with a smaller footprint, drop-in effi ciency and payback in as little as two weeks. Along with our digital tools, you will receive unmatched expertise offered by our HVAC-R professionals. VISIT US AT AHR BOOTH# 4945 CIRCLE ID #25 ON READER SERVICE CARD OR GO TO HVACPPRODUCTS.COM/MARKET manufacturer — Evapco. According to Kurt Juergensen, senior mechanical engineer at Leach Wallace, the existing cooling towers were connected to three, 300 ton centrifugal chillers. "Clearly, the new coolers would need to meet their need for evaporative cooling and also have the additional capacity for a new, 300 ton chiller needed for the hospital's anticipated expansion." EVAPORATIVE SOLUTION Specified for the hospital were two Evapco AT induced-draft, counterf low cooling towers. With the smallest footprint in the industry for coolers of their size, the towers are rated for 2,063 max gpm, each with two modular, 300 ton (six million Btu) cells, for a total of 1,200 tons or 14.4 million Btu of evaporative cooling capacity. Each AT cooling tower provides external access to fully enclosed motors and belts. Attached to the motors is the company's heavy- duty Power-Band drive system with aluminum alloy sheaves and pillow block bearings that provide a minimum guaranteed life of 75,000 hours and an aluminum alloy, statically balanced, VFD-controlled, 25 horsepower fan. The Gettysburg cooling towers also have galvanized steel access ladders and platforms, ideal for service and maintenance work and easy access to fan motors and water distribution components. "With Evapco, the ease of service and maintenance is a big improvement over our previous system. Before, we had to crawl into our old units to maintain them. Now, everything's available from the exterior," Lehigh said. Installation day efficiency can be credited to the forward-thinking design team and installers that made sure the piping to the roof was already in place for a further expansion of the facility, including an additional tower cell, adding 300 tons of cooling capacity. Each tower is paired with a VFD, dialed-in for optimal, N+1 operation. On a given day, the facility may need only 900 tons, but they have a full cell HVACPproducts.com Winter 2017/2018 \ HVAC & Plumbing Product News 31

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