New CITY MULTI® Water-Source Units

Wednesday, January 02, 2008


Units tie into buildings' existing closed water loop systems


SUWANEE, Ga., January 2, 2008 - Mitsubishi Electric HVAC Advanced Products Division, Suwanee, Ga., has introduced a new series of CITY MULTI water-source Variable Refrigerant Flow Zoning (VRFZ) units, available in either a heat-recovery unit or heat pump unit.

"The new WR2-Series heat recovery units and WY-Series heat pumps are designed for buildings with existing closed water loop systems," says Meredith Emmerich, manager of application support, Mitsubishi Electric HVAC. "The new W-Series can be installed inside, rather than outside a building. This series uses the efficiency of water as a heat exchange medium combined with Mitsubishi Electric HVAC's proprietary INVERTER-driven compressor, which effectively uses energy to provide optimum comfort in all connected zones."

The WR2-Series offers heat recovery and can simultaneously cool and heat connected zones, while the WY-Series is a heat pump model designed to work in either the cooling or heating mode.
Zone cooling and heating is controlled by refrigerant piped between the water source unit, a BC controller (WR2-Series) or header (WY-Series) and the indoor units. The highly responsive INVERTER-driven compressor by Mitsubishi Electric HVAC reacts to the detection of subtle fluctuations in room and outdoor temperatures and adjusts the system performance automatically to maintain precise system capacity. By varying the refrigerant flow to various indoor units, the capacity of the system matches the indoor space load requirements while the INVERTER technology ensures that only the minimal amount of capacity is distributed overall for extremely effective energy usage. A variety of indoor units and local controllers also are available to provide facility occupants with precise control over indoor comfort.

WR2- and WY-Series systems can be operated and managed with the CITY MULTI Controls Network (CMCN), which offers a variety of tools and software applications to provide local and centralized control over a building's HVAC systems.

The WY-Series and WR2-Series units must be installed in a closed water loop system. Typical closed loop installations include a dry cooler, a closed cooling tower or an open cooling tower with a heat exchanger.

The W-Series units can be installed floor by floor inside a building, easily complementing existing closed water loop systems and offering a solution for building managers who need to install equipment indoors. Refrigerant, water and electrical connections on the top or left sides of the units allow side-by-side installations or stacking with the proper structural support.

The W-Series is available for order now. For more information about the entire line of CITY MULTI systems, please visit

About Mitsubishi Electric HVAC Advanced Products Division
For more than 27 years, Mitsubishi Electric HVAC Advanced Products Division, headquartered in Suwanee, Ga., has been a leading marketer of intelligent air-conditioning and heating technology, manufactured by its parent corporation, Mitsubishi Electric. The Division's market distribution includes North America, Latin America, the Caribbean and Bermuda.
Mitsubishi Electric HVAC, an Official Sponsor of the PGA TOUR and Champions Tour, continues to build brand loyalty, increase its market position and deliver exceptional customer service through the Mitsubishi Diamond Alliance™ program. This program is a strategic platform of training-based achievement programs designed to synergize the efforts of Mitsubishi Electric HVAC distributors, contractors and design engineering firms. For more information on the Mitsubishi Diamond Alliance, Mr. Slim® split-ductless cooling and heating systems, CITY MULTI® Variable Refrigerant Flow Zoning (VRFZ) technology, compressors, PlasmaPure™ room air purification systems, a full line of accessories for the Mr. Slim product line, including Line-Hide™ line-set covers and the Mitsubishi Electric HVAC Advanced Products Division, call 800/687-1966 or visit

CITY MULTI installations received Honorable Mention and Runner Up awards in the New Construction category of the 2007 Design/Build Awards Competition sponsored by Contracting Business. Additionally, a 2007 Contracting Business survey named Mitsubishi Electric HVAC as contractors' top preferred brand. A 2006 survey by ACH&R News listed Mitsubishi Electric HVAC as contractors' most preferred ductless manufacturer and the number one brand in price/value, availability, reliability and performance specifications. In 2005, CITY MULTI products were named as one of the top 100 smart products for buildings by Buildings Magazine and received a Bronze Award in the HVAC product category for Consulting Specifying Engineer's Product of the Year contest. In 2004, Mr. Slim products received a Bronze Award in ACH&R News' Dealer Design Awards contest.

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