Specifications

24
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 simul-
taneous 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.
W-SERIES OVERVIEW
PQRY
PQRY
Water-source VRFZ unit
Double Heat Recovery with WR2-Series
Typical closed-loop
installations
49 ft
164 ft
Piping length 360 ft
Heat
storage
tank
Indoor units
Cooling tower
water
CITY MULTI VRFZ
-source unit
BC controller
49 ft
Water circuit
Total piping
length for
WR2-Series is
984 - 1,312 ft
depending on
location of
BC controller
Furthest
indoor unit from
water-source
unit = 492 ft
Piping length 131 ft
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.
Closed cooling tower
Dry cooler
Open cooling tower
W-Series
W-Series
W-Series
Heat
exchanger
Closed cooling tower
Dry cooler
Open cooling tower
W-Series
W-Series
W-Series
Heat
exchanger
Closed-loop cooling towers recommended
CITY MULTI
®
W-Series:
Water-Source Systems that
Simultaneously Cool and Heat
or provides Heat Pump Operation