User`s manual

Energy efficiency and quiet operation
Outdoor units use Daikin’s unique scroll compressor to realise energy saving
performance and quiet operation.
MAIN FEATURES
High COP during both cooling and
heating operations
Quiet operation provides
luxurious comfort
Quietness is yet another important feature
of Daikin’s VRV III-S system. To reduce
noise and realise comfortable operation,
latest technologies and features are
applied to the outdoor units.
One of the top features of the VRV III-S is
its energy efficiency. It achieves high COP
during cooling and heating operations by
utilising Daikin’s unique scroll compressor.
These two features work to significantly
reduce noise. Guides are added to the bell
mouth intake to reduce turbulence in the
airflow generated by fan suction. The Aero
Spiral Fan features fan blades with the bent
blade edges, further reducing turbulence.
Smooth Air Inlet Bell Mouth and Aero Spiral Fan
A larger sub-cooled area reduces refrigerant flow sound by making it easer to form
a liquid seal in front of the electrical valve.
SC heat exchanger
Super Aero Grille
Refined ventilation mechanism enables further reduction in required fan power.
A collection of cutting-edge technologies
results in efficient and quiet operation.
Improving the high efficiency compressor
to achieve a high COP
2
5
1
Note: Data are based on
studies conducted under
controlled conditions at
a Daikin laboratory.
Above values are based on the following nominal conditions:
• 2 built-in units are connected (4 class (11.2 kW): FXSYQ50M x 2; 5 class
(14 kW): FXSYQ63M x 2; and 6 class (15.5 kW): FXSYQ63M + FXSYQ80M.)
•
Cooling: Indoor temp. of 27°CDB, 19.0°CWB, and outdoor temp. of 35.0°CDB.
• Heating: Indoor temp. of 20°CDB, and outdoor temp. of 7°CDB, 6°CWB.
DC fan motor
Efficiency improved in all areas compared
to conventional AC motors, especially at
low speeds.
4
Sine wave DC inverter
>> Smooth sine wave DC inverter
Use of an optimised sine wave
smoothes motor rotation, further
improving operating efficiency.
Use of neodymium magnets in the motor
enables efficient generation of high torque,
reducing the size of the compressor.
>> Powerful magnets
Changes to the shape of the spiral and volume
ratio result in optimal refrigerant layout.
>> Optimal refrigerant configuration
The strength of the casing has been increased
by boosting the internal dome pressure.
>> Stronger materials
Overheating losses are reduced by pressurising the area
around the motor, boosting energy saving performance in
conjunction with other features.
Reluctance DC Scroll Compressor
Neodymium magnets are well known for their powerfulness
compared to commonly used ferrite magnets.
3
DC motor efficiency
(comparison with a conventional AC motor)
200 300 400 500 600 700 800 900 1000
0
20
40
80
60
100
Efficiency (%)
Motor speed ( rpm )
AC motor
AC motorAC motor
Approx.
40%
increase
Approx.
20%
increase
DC motor
DC motor
DC motor
DC motor
DC motor
DC fan motor structure
VRVII-S
Previous model
RXYMQ-MV4A
VRVII-S
Previous model
RXYMQ-MV4A
Lower operation sound
is achieved!
RXYMQ4PV4A
RXYMQ5PV4A
RXYMQ6PV4A
Reluctance
DC motor
By introducing high pressure oil, the
reactive force from the fixed scroll is added
to the internal force, thereby reducing
thrust losses. This results in improved
efficiency and suppressed sound levels.
High thrust mechanism
3
4
1
5
2
Cooling
Heating
2.94
3.62
2.81
3.45
3.73
3.58
3.03
2.82
Cooling
50
51
53
4 class (11.2 kW)
5 class (14 kW)
6 class (15.5 kW)
5 class (14 kW)
3.15
3.07
4 class (11.2 kW)
6 class (15.5 kW)
5 class (14 kW)
3.37
3.27
4 class (11.2 kW)
6 class (15.5 kW)
Heating
52
53
55
53
54
56
51
52
54
4 class (11.2 kW)
5 class (14 kW)
6 class (15.5 kW)
65
Nighttime quiet operation function
Set on the outdoor PCB. Time of maximum temperature is
memorised. The low operating mode will initiate 8 hours*
1
after
the peak temperature in the daytime, and normal operation will
resume 10 hours*
2
after that. The operation sound level for the
night mode can be selected from 47 dB(A) (Step 1), 44 dB(A)
(Step 2) and 41 dB(A) (Step 3).
Automatic mode
Mode 1.
Automatic mode
Mode 1.
Starting time and ending time can be input. (An external control
adaptor for outdoor unit, DTA104A53/61/62, and a locally
obtained timer are necessary.)
Manual mode
Mode 2.
Combinations of modes 1 and 2 can be used depending on
your needs.
Combined mode
Mode 3.
*1. Initial setting. Can be selected from 6, 8 and 10 hours.
*2. Initial setting. Can be selected from 8, 9 and 10 hours.
Note:
• This function is available in setting at site.
• The relationship of outdoor temperature (load) and time shown in the
graph is just an example.
Peak in outdoor temperature
Capacity %
8 hrs 10 hrs
Operation sound dB(A)
47
8:00 12:00 16:00 20:00 0:00 4:00 8:00
50
100
50
0
Load %
Night mode endsNight mode starts Night mode endsNight mode starts
Night Mode
44
41
(Initial setting)(Initial setting)
Step 1 max. - 3dB(A)
( 4 class/11.2 kW)
Step 2 max. - 6dB(A)
( 4 class/11.2 kW)
Step 3 max. - 9dB(A)
( 4 class/11.2 kW)
Step 1: 47 dB(A)
Step 2: 44 dB(A)
Step 3: 41 dB(A)
Operation sound level selectable
from 3 steps for the night mode
The capacity reduction rate differs depending on the operation sound level
step selected.
-1dB(A)
-1dB(A)
-1dB(A)
-1dB(A)
-1dB(A)
-1dB(A)
1 dB(A) reduced
in
each model!
High COP
achieved
in all ranges!
Escaping eddies are sucked in by
the bent blade edges, reducing
overall turbulence.
With the bent
blade edge
Without the bent
blade edge