"The built-in hydronic package option is truly what sets Aquasnap chillers apart," said Dave Smith, Carrier's product manager for air-cooled chillers. "Included in the hydronic package is the pump, triple-duty-valve, flow switch, strainer, pressure/temperature taps, and required piping. Factory designed, tested, and installed, the prepackaged system costs less and installs more quickly and easily than buying and installing the components individually."

With 22 models ranging from 60 to 390 tons, the new chiller combines "easy system design and installation with efficient operation saving owners, consulting engineers, and contractors time and expense," it said.

"Today's owners demand high efficiency from their chilled-water plants," said Bruce Burdon, director of product management and marketing for Carrier's North America Commercial Division.

"Per ARI 550/590-98, chillers operate at design conditions less than 1 percent of the time. As a result, superior part-load efficiency is the most important attribute to lowering equipment operating cost."

Carrier's Evergreen centrifugal chillers equipped with the new Liquiflo-II "enables chiller plants to achieve industry-leading part-load efficiencies, significantly reducing operating cost without compromising the environment," said Burdon.

With efficiency ratings up to 14.3 SEER and EER ratings up to 12.7, Carrier said its new line of Centurion rooftop air conditioning units exceed Energy Star and ASHRAE 90.1 standards.

"As the industry's premier zoning system, Carrier's 3V control system integrates advanced state-of–the-art control components that deliver unparalleled comfort and unmatched energy efficiency for constant- volume, VVT, or packaged variable air volume systems," said Burdon.

"This new system intelligently interprets building conditions and optimizes equipment operation."

The System Pilot is the main component of the 3V control system and serves as the user-interface and navigation tool for each system. Supported by an easy-to-read, 8-line LCD display, the System Pilot is designed to provide quick and easy system commissioning and unit diagnostics.

"In fact, when combined with Carrier's ComfortLinkâ„¢ rooftop controller, refrigerant circuit pressures can be monitored at the system pilot from inside the building, all but eliminating the need for pressure gauges and multiple trips to the roof," said Debra Drapas, product manager for packaged controls. "Another main component of the 3V system is the Universal Controller. With eight inputs and outputs and 29 pre-programmed algorithms, control of auxiliary components - such as lighting, fans, boilers, and other HVAC equipment - has never been simpler."

Carrier said its 3V system is "the only zoning system that satisfies ventilation requirements on a zone level and does so based on actual building occupancy." This demand control ventilation algorithm results in significant savings in energy costs, it added.

Centurion rooftops also offer ComfortLinkâ„¢ controls, designed to monitor and adjust unit operation. They are available in 14 sizes, ranging from 2 to 25 tons in both gas and electric heating.

Publication date: 11/08/2004