19
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Configuration
Installer and user reference guide
112
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
19.3.1 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.
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.
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.
[2‑8]
T
e
target (°C)
3
7
4
8
5
9
