Mitsubishi Electric City Multi R2 Series, Manual

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What is Water-Cooled?
Water cooled systems
can be used even in
buildings that are taller
than 50 m by running a
main water pipe through
each floor.
Pump
Heat source
unit
Cooling tower
• Buildings that require year-round cooling
For example,
• Tenant buildings in which kitchens and offices exist together
• Buildings in which equipment rooms and offices exist together
• Buildings in which there are large room temperature differences between sunny and unsunny rooms
• Hotels in which there are a lot of individual operation needs
Any heat source system
that can supply heat
source water between
10°C~45°C can be
used.
Benefits of the WY/WR2-Series
• Installation image
It is possible now to combine the features of VRF with a water circuit using CITY MULTI
WR2/WY. In this case, the heat is discharged to a water source rather than to the outside
air.
The advantages of a water cooled system are that the water can be delivered at optimized
temperatures and volumes, which allows even greater flexibility and increased COP.
Water cooled systems are ideal for use in temperate and cooler climates, since it
does not involve heat exchange with the outside air.
A unique system from Mitsubishi Electric
Simultaneous heating and cooling operation is possible. (WR2-Series)
Water cooled systems are recommended for use in buildings that have the following heating and cooling needs.
Mitsubishi Electric now offers double heat recovery operation.
The first heat recovery is within the refrigerant system. Heat is recovered between the indoor units to allow simultaneous
cooling and heating operation.
The second heat recovery is within the water loop, where heat is recovered between the PQRY units.
This double heat recovery operation substantially improves energy efficiency and delivers an ideal solution to the
requirements of modern office buildings, where some areas require cooling even in winter.
Heating
Cooling
Indoor units
Indoor units
Heat source unit
BC controller
Water circuit
Heat recovery Second
Heat recovery
First
Heat recovery
First
Cooling tower
Expansion tank
Pump Water piping
Heating Heating Heating Cooling
Heating Heating Heating Cooling
Cooling Cooling Cooling Heating
Cooling Cooling Cooling
BC controller
Heat source unit
Heat
exchanger
GL
Pump
Thermal
storage tank
Heating
* The water
circuit is closed.
Heat taken from water
Heat radiated to water
Auxiliary heat
source
• WR2 system diagram
• Double heat recovery (WR2)
Heat recovery First
between indoor units
Heat recovery
between heat source units
Second
Double heat recovery (WR2-Series)
Benefits of the WR2-Series
Refrigerant circuit
71
VRF
Lineup
VRF
R2-Series
VRF
Zubadan
VRF
WY-Series
VRF
WR2-Series
VRF
S-Series
VRF
Indoor Units
Ventilation
Systems
Technologies and Functions
Remote Controller
Hot Water Solution
VRF
BC Controllers
VRF
S-Series
VRF
Y-Series