GREEN SYSTEMS e Continued from p 28
temperature and sequential modulation of each multi-stage burner. A single LCI (local control interface) controls all the units from one on-site location. A key interest of Kelliher’s was the
ability to link, control and monitor all of the new system components. After researching several options, he settled on a plan to install an iWorx, web- based controls system in the two
A single LCI (local control interface) controls all the units from one on-site location. 30
buildings Boremco still inhabits. The iWorx system, by Taco, is a web- based building management, monitoring and control system specifically designed for the light commercial market. “What makes iWorx different from
other systems,” explained Tom Polansky, technical service engineer at Taco, “is that you don’t need special tools, software or computers to do the installation or commissioning.” Once wired, programs are resident in the controller. By manipulating control parameters for the specific HVAC equipment from a single, central location through the LCI, engineering time is eliminated, and installation costs drop significantly. “Once a controller is wired into the
system, you just push a button, and it identifies itself on the network,” continued Polansky. “No control sequences to write, no website to build.” Boremco maintenance crews were
shown how to use the iWorx system, and Thermo-Mechanical remotely monitors it. “Management at Boremco wanted a hands-off approach to system monitoring,” said Kelliher. “We remotely monitor the system for Boremco. An iWorx system can be set up to email a message if there is equipment failure or a problem. If the temperature, run time, on/off cycles or anything else of the sort extends beyond set parameters, we’re immediately notified. “This past winter, Boremco’s
e Circle 19 on reader reply form on page 84
heating energy costs were less than a quarter of what they were in years before. Of course, some of that is attributed to the decreased heat load as a result of not heating the two buildings, but the energy saved is still staggering.”
Smooth sailing in choppy waters “The project had its fair share of
challenges,” said Dean Haskins, project manager at Thermo- Mechanical. “We laid 5,000 feet of gas line in a 200-year-old facility.” Throughout the trenching process, numerous old utility and pipe lines were crossed, some still in use, others long since abandoned. During the design phase, they also learned that many old roof trusses would need to be repaired before the new, packaged rooftop furnace systems could go up.” “There’s no doubt that installing
the controls system was the easiest part of the job,” said Haskins. “We were all very impressed with how quickly it was installed and brought up for online use. Of all the controls I’ve encountered, iWorx is by far the simplest to install. Commissioning was a piece of cake; just push one little button on the side of the control module, and it’s up and running.” “We usually plan for three – five
days for commissioning of the controls system. By lunchtime on the first day, my tech called,” continued Haskins. “I was under the impression they’d have a problem, given the first installation of the iWorx controls. He asked me what to do for the next three days, because commissioning was finished!” The installation was used as a
proving ground for the iWorx controls system. Boremco hopes to put up additional buildings in the near future, to lease out to other tenants. “There’s no question about it,” said Kelliher. “The new buildings will be controlled by iWorx.” l
phc october 2011
www.phcnews.com
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