Water-Source Systems that Simultaneously Cool and Heat or provide Heat Pump Operation

W-Series units combine the convenience of water-source systems with VRFZ technology. These units are easily installed indoors, which means that system performance efficiency is independent of outdoor ambient temperatures. The W-Series includes WR2 models for simultaneous cooling and heating, and WY models as powerful heat pumps.

Now you can control temperature in every room, on every floor, in every building with Mitsubishi Electric’s CITY MULTI systems. It’s an innovative concept that is transforming the way the industry approaches building design, construction, and renovation; it’s based on the understanding that every building has its own unique characteristics and challenges. The CITY MULTI VRFZ building comfort solution gives you the freedom to customize a solution that fits your building like a tailored suit fits a person. As usage patterns and building requirements change, the systems can be adapted to fit these new needs.

W-Series systems from CITY MULTI use water as a heat exchange medium and are intended to be installed inside, rather than outside a building. Zone cooling and heating is controlled by refrigerant piped between water-source unit, BC controller (R2-Series) or manifold (Y-series) and indoor units. W-Series systems can be designed with a wide selection of indoor model configurations and controllers. Indoor units can be monitored and operated individually with remote controllers, up to 50 from one central controller, or up to 2,000 using the TG2000 software. And the CITY MULTI Controls Network (CMCN) integrates with LonWorks® and BACnet® for integrated systems control of the entire building.

Applications include multi-story office buildings, government buildings, military buildings, medical facilities, nursing homes, schools and universities, hotels, resorts, casinos and multi-family dwellings.

Double heat recovery
The double-heat recovery feature of the WR2-Series helps control energy that would normally be rejected to the atmosphere. First, within the system, energy is absorbed in units providing cooling. The energy is redirected by refrigerant to units that are in heating mode. Secondly, energy can be recovered between systems through the water loop. For example, a system providing primarily cooling is rejecting heat to the water loop. This energy could then be utilized by systems providing primarily heating.