User`s manual

Design flexibility Easy installation
VRV III-S systems offer broad design flexibility with long refrigerant piping lengths and
multiple indoor unit combinations, which provides generous freedom for office and shop
design both inside and out.
A variety of functions are provided that make installation easier, such as simple wiring
and piping and automatic test operation.
MAIN FEATURES
A printed circuit board has been
adopted that is much easier to see
and wire during installation.
Easy wiring
Simply press the test operation button after refrigerant charging is completed, and the unit
performs an automatic system check, including wiring, shutoff valves, and sensors. The results
are returned automatically after the check finishes.
Automatic test operation
For a 6 class (15.5 kW) installation
Multiple indoor unit combinations are possible. * As many as 9 indoor units can be connected
to a 6 class (15.5 kW) unit, making the VRV III-S a versatile system.
* Total capacity index of connectable indoor units must be 50%–130% of the capacity index of the outdoor units.
Up to 9 indoor units can be
connected to a single outdoor unit
The VRV III-S provides the long piping
length possibility of 150 m, with a total piping
length of 300 m. If the outdoor unit is
installed above indoor units the level
difference can be up to a maximum of 50 m.
These generous allowances facilitate an
extensive variety of system designs.
Long piping design possible
Actual piping length
Max. 150 m
Total piping length
Max. 300 m
1
2
3
4
5
6
7
8
9
units
Max.
9
>> Max. 8 indoor units for a 5 class
(14 kW)
installation
>> Max. 6 indoor units for a 4 class
(11.2 kW)
installation
*1. 40 m when the outdoor unit is installed below indoor units.
*2. Maximum piping length between the indoor unit and the first branch is 40 m.
Note:
The operation range of the VRV III-S system works to
reduce limitations on installation locations. The
operation temperature range for heating goes all the
way down to -20°C, while cooling can be performed
with outdoor temperatures as high as 46°C. Both these
achievements are due to the adoption of a high-
pressure dome-type compressor.
Certified operation temperature range
Wide operation temperature range
Previous model
VRV II-S
87
-10
0
10
20
30
40
50
-20
-10
0
10
20
15.5°CWB
Heating
46°CDB
Cooling
-5°CDB
-20°CWB
Outdoor temperature (°CDB)
Outdoor temperature (°CWB)
Max. 50 m*
1
*
2
Max. 15 m
Level
difference
Level difference
between indoor
units
Unique piping and wiring systems make it possible to install a VRV III-S system quickly and easily.
Simple wiring and piping connection
Daikin’s advanced REFNET piping system makes installation
easy. Only two main refrigerant lines are required in any one
system. REFNET greatly reduces the imbalances in refrigerant
flow between units, while using small-diameter piping.
>> REFNET piping system
A super wiring system is used to enable shared use of the wiring
between indoor and outdoor units and the central control wiring, with
a relatively simple wiring operation. The DIII-NET communication
system is employed to enable the use of advanced control systems.
>> Super wiring system
Outdoor unit
Central
remote
controller
Indoor unit