The Envision™ NXW Series of reversible chillers are now available in 8- to 20-ton sizes. These water-to-water heat pumps provide water heating and cooling for a wide range of applications, including pools, commercial aquariums, radiant floor heating, ice melt, and chilled-water. They also provide precisely heated or cooled water for fan coils and can replace low-efficiency water-cooled chillers and electric boilers. The chillers feature quiet dual-scroll compressors with phase guard protection to prevent reverse rotation of the compressors. The sophisticated microprocessor control, with robust safety controls and advanced freeze detection, sequences all components and functions to achieve maximum performance. The control also enables easy connection to a building automation system with N2 Open, BACnet, or LonWorks protocols. The compact footprint of the reversible chiller makes it easy to fit through most doors. All unit frames are constructed of heavy-gauge steel channel, and the unit’s brazed plate heat exchangers are constructed with 316 stainless steel for longevity. According to the manufacturer, the unit’s fast response lessens system changeover time on two-pipe fan coil systems.

WaterFurnace International Inc., 9000 Conservation Way, Fort Wayne, IN 46809;

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