Daikin RWEYQ30PY1 [18/342] The first stage between indoor units the second stage between vrv wiii units

Daikin RWEYQ30PY1 [18/342] The first stage between indoor units the second stage between vrv wiii units
Si30-813 Features
General Information 7
1.3 Energy Saving
Heat recovery
In mainly cooling, partly heating mode, the system recycles
heat exhausted from the cooling operation to use for heating.
In mainly heating, partly cooling mode, the system uses cooled
post-heating operation refrigerant for cooling. Efficiency
improves the more simultaneous operation is performed.
Note: • Above system configurations are for illustration purposes only.
Heat rejected
to loop
Heat rejected
to loop
Simultaneous heating and cooling operation
within the refrigerant system.
Heat recovery operation is also available between
systems connected to the same water loop, with systems
exchanging heat via water. This increases energy
efficiency.
Heat recovery operation between
the VRV-WIII units.
Cooling tower (Closed type), boiler
coolingcoolingcooling
coolingcoolingcooling
The first stage: Between indoor units
The second stage: Between VRV-WIII units
Heat absorption
from loop
Heat absorption
from loop
A
B
C
D
E
Heat radiation operation
(all cooling operation)
Heat radiation tendency
heat recovery operation
(mainly cooling,
part heating operation)
Heat recovery operation
(cooling and heating operation)
Heat absorption tendency
heat recovery operation
(mainly heating,
part cooling operation)
Heat absorption operation
(all heating operation)
Heat rejected
to loop
Heat absorption
Heat
rejected
cooling coolingcoolingcooling
cooling heatingcoolingcooling
heating heatingcoolingcooling
heating heatingheatingcooling
heating heatingheatingheating
heatingheatingheating
heatingheatingheating
Daikin offers 2-stage heat recovery operation.
The first stage of heat recovery operation is within the
refrigerant system. By controlling the BS unit that
switches cooling and heating, simultaneous cooling
and heating operation is made possible, with heat
recovery performed between indoor units.
The second stage of heat recovery operation is within
the water loop, where heat recovery is performed
between the VRV-WIII units.
This 2-stage heat recovery operation substantially
improves energy efficiency and makes the system the
ideal solution to the requirements of modern office
buildings, where some areas may require cooling
even in winter, depending on the amount of sunshine
received and the number of people in the room.
Stage 1 Stage 2
1000 mm
780 mm
550 mm
VRV-WIII
VRV-WIII
VRV-WIII
VRV-WIII
VRV-WIII
VRV-WIII
VRV-WIII
VRV-WIII
VRV-WIII
Heat transfer

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