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RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
4P329765-1 – 2012.09
Installation and operation manual
58
Procedure: stop all indoor units (VRV DX RA DX indoor
units).
When the system is not operating (all indoor units thermo OFF), you
can define the master RA DX indoor unit by addressing that unit with
infrared user interface (instruct thermo ON in desired mode).
The only way to change the master unit is by repeating the previous
procedure. A cool/heat switchover (or opposite) is only possible by
changing the operation mode of the defined master indoor unit.
In case you want to keep the VRV DX indoor unit user interface as
master, contact your installer.
6.5.
Precautions for group control system or two user
interface control system
This system provides two other control systems beside 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.
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.
Three main operation methods are available:
Basic
The refrigerant temperature is fixed independent from the situation. It
corresponds to the standard operation which is known and can be
expected from/under previous VRV systems.
Automatic
The refrigerant temperature is set depending on the outdoor ambient
conditions. As such adjusting the refrigerant temperature 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.
Hi-sensible
The refrigerant temperature is set higher/lower (cooling/heating)
compared to basic operation. The focus under high sensible mode is
comfort feeling for the customer.
The selection method of indoor units is important and has to be
considered as the available capacity is not the same as under basic
operation. For details concerning to Hi-sensible applications, please
contact your installer.
Available comfort settings
For each of above modes a comfort level can be selected. It is related
to the timing and the effort (energy consumption) which is put in
achieving a certain room temperature by temporarily changing the
refrigerant temperature to different values:
Powerful
Quick
Mild
Eco
NOTICE
Contact your dealer in case of changing the combination or
setting of group control and two user interface control
systems.
INFORMATION
Combinations of Automatic mode together with Hydrobox
applications should be considered. The effect of the energy
saving function can be very small when low/high
(cooling/heating) leaving water temperatures are
requested.
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