7 Configuration
Installer and user reference guide
36
RXYSQ8~12TMY1B
VRV IV-S system air conditioner
4P404225-1B – 2016.03
7.2.9
To connect the PC configurator to the
outdoor unit
2
3
4
5
H J
ST
a
b
X27A
A1P
a
PC
b
Cable (EKPCCAB)
X27A
Connector
A1P
Outdoor unit main PCB
7.3
Energy saving and optimum
operation
This heat pump 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 the particular application.
Several patterns are available and explained below. Modify the
parameters to the needs of your building and to realize the best
balance between energy consumption and comfort.
No matter which control is selected, variations on the behaviour of
the system are still possible due to protection controls to keep the
unit operating under reliable conditions. The intentional target,
however, is fixed and will be used to obtain the best balance
between energy consumption and comfort, depending on the
application type.
7.3.1
Available main operation methods
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.
In case of RXYSQ8:
To activate this in…
Change…
Cooling operation
[2‑8]=2
Heating operation
[2‑9]=2
In case of 12:
To activate this in…
Change…
Cooling operation
[2‑8]=2
Heating operation
[2‑9]=6
Automatic
The refrigerant temperature is set depending on the outdoor ambient
conditions. As such adjusting the refrigerant temperature to match
the required load (which is also related to the outdoor ambient
conditions).
E.g., when your system is operating in cooling, you do not need as
much cooling under low outdoor ambient temperatures (e.g., 25°C)
as under high outdoor ambient 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.
E.g., when your system is operating in heating, you do not need as
much heating under high outdoor ambient temperatures (e.g., 15°C)
as under low outdoor ambient temperatures (e.g., –5°C). Using this
idea, the system automatically starts decreasing its refrigerant
temperature, automatically reducing the delivered capacity and
increasing the system's efficiency.
In case of RXYSQ8:
To activate this in…
Change…
Cooling operation
[2‑8]=3 (default)
Heating operation
[2‑9]=1 (default)
In case of 12:
To activate this in…
Change…
Cooling operation
[2‑8]=0 (default)
Heating operation
[2‑9]=0 (default)
Hi-sensible/economic (cooling/heating)
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 dealer.
To activate this in…
Change…
Cooling operation
[2‑8] to the appropriate value,
matching the requirements of the
pre-designed system containing
a high sensible solution.
Heating operation
[2‑9] to the appropriate value,
matching the requirements of the
pre-designed system containing
a high sensible solution.
In case of RXYSQ8:
[2‑8]
T
e
target (°C)
4
8
5
9
6
10
7
11
In case of RXYSQ8:
[2‑9]
T
c
target (°C)
4
43
In case of 12:
[2‑8]
T
e
target (°C)
4
8
5
9
6
10
7
11
In case of 12:
[2‑9]
T
c
target (°C)
3
43
