Installation and operation manual
50
10T8Y1B
VRV-W IV System Air Conditioner
4P399208-1 – 2015.01
When the system is installed as shown in the figure above, it is
necessary to designate one of the user interfaces as the master user
interface depending on the setup
A
,
B
or
C
.
A.
Heat pump system:
All VRV DX indoor units operate in the same operation mode.
The master user interface decides the operation mode.
B.
Heat recovery system (with a separate BS unit for each indoor
unit):
Each VRV DX indoor unit is connected to a dedicated BS unit.
No master user interface needs to be selected; each VRV DX
indoor unit can select his own operation mode.
C.
Heat recovery system (with one BS unit for several indoor units):
Several VRV DX indoor units are connected to 1 BS unit. The
master user interface decides the operation mode for all
VRV DX indoor units connected to the same BS unit.
The displays of slave user interfaces show
(change-over
under centralized control) and slave user interfaces automatically
follow the operation mode directed by the master user interface.
Only the master user interface can select heating or cooling mode.
6.4.1
How to designate the master user interface
1
Press the operation mode selector button of the current master
user interface for 4 seconds. In case this procedure was not yet
performed, the procedure can be executed on the first user
interface operated.
The display showing
(change-over under centralized
control) of all slave user interfaces connected to the same
outdoor unit flashes.
2
Press the operation mode selector button
of the controller that
you wish to designate as the master user interface. Then
designation is completed. This user interface is designated as
the master user interface and the display showing
(change-over under centralized control) vanishes. The displays
of other user interfaces show
(change-over under
centralized control).
6.5.
Precautions for group control system or two user
interface control system
This system provides two more control systems in addition to the
individual control system (one user interface controls one indoor
unit). Confirm the following if your unit is of the following control
system type:
Group control system
One user interface controls up to 16 indoor units. All indoor units
are equally set.
Two user interface control system
Two user interfaces control one indoor unit (in case of group
control system, one group of indoor units). The unit is
individually operated.
7.
Energy saving and optimum operation
Observe the following precautions to ensure the system operates
properly.
Adjust the air outlet properly and avoid direct air flow to room
inhabitants.
Adjust the room temperature properly for a comfortable
environment. Avoid excessive heating or cooling.
Prevent direct sunlight from entering a room during cooling
operation by using curtains or blinds.
Ventilate often.
Extended use requires special attention to ventilation.
Keep doors and windows closed. If the doors and windows
remain open, air will flow out of your room causing a decrease in
the cooling or heating effect.
Be careful not to cool or heat too much. To save energy, keep
the temperature setting at a moderate level.
Never place objects near the air inlet or the air outlet of the unit.
It may cause deterioration in the effect or stop the operation.
Turn off the main power supply switch to the unit when the unit is
not used for longer periods of time. If the switch is on, it
consumes electricity.
Before restarting the unit, turn on the main power supply switch
6 hours before operation to ensure smooth running. (Refer to
"Maintenance" in the indoor unit manual.)
When the display shows
(time to clean the air filter), ask a
qualified service person to clean the filters. (Refer to
"Maintenance" in the indoor unit manual.)
Keep the indoor unit and user interface at least 1 m away from
televisions, radios, stereos, and other similar equipment. Failing
to do so may cause static or distorted pictures.
Do not place items under the indoor unit, they may be damaged
by water.
Condensation may form if the humidity is above 80% or if the
drain outlet gets blocked.
Do not use other heating devices directly beneath the indoor
unit.
Fully use the function of air flow direction adjust. Cold air gathers
on the floor, and warm air gathers close to the ceiling. Set the air
flow direction parallel during cooling or dry operation, and set it
downwards during heating operation.
Make sure that the inlet and outlet of the indoor unit are not
clogged.
Your system is equipped with advanced energy saving functionality.
Depending on the priority emphasises can be put on energy saving or
comfort level. Several parameters can be selected, resulting in the
optimal balance between energy consumption and comfort for your
particular application.
Several patterns are available and roughly explained below. Contact
your installer or dealer for advice or to modify the parameters to the
needs of your building.
Detailed information is given for the installer in the installation
manual. He can help you to realize the best balance between energy
consumption and comfort.
Two main operation methods are available:
Automatic
The refrigerant temperature is set to match the required load.
E.g., when your system is operating in cooling, you do not need as
much cooling under low outdoor temperatures (e.g., 25°C) as under
high outdoor temperatures (e.g., 35°C). Using this idea, the system
automatically starts increasing its refrigerant temperature,
automatically reducing the delivered capacity and increasing the
system's efficiency.
NOTICE
Contact your dealer in case of changing the combination or
setting of group control and two user interface control
systems.
