RHOSS TCAEBY 269 Mode D'emploi page 52

EN
ACM Autotuning compressor management
AdaptiveFunction Plus enables the EasyPACK units to adapt to the system they are serving, so as to always identify the best compressor operating
parameters in the different load conditions. During the initial operating phases, the special "Autotuning" function enables the EasyPACK units with Adapti-
veFunction Plus to learn the thermal inertia characteristics that regulate the system dynamics. The function, which is automatically activated when the unit
It is then possible to estimate the physical characteristics of the system and thereby identify the optimal value of the control parameters to be used.
At the end of this initial estimate phase, the "Autotuning" function remains active, thereby allowing the control parameters to be promptly adapted to every
change in the water circuit and therefore, in the water content of the system.
Set-point Compensation
The Economy function allows the chiller to run on energy-saving programmes while still providing the required level of comfort.
This function controls the maximum delivery temperature with sliding set-points, changing the set-point according to the system's actual heat load; when the
summer load decreases, the set-point increases, and when the winter load decreases, the set-point decreases.
This function is intended for cooling applications, and is designed to control energy consumption while always respecting the actual demands on the system's
capacity. Within the Economy function it is possible to select one of three different set-point adaptation curves depending on the type of system.
"Economy" function in Winter mode
y
S
L
M
H
x Load percentage (%)
y Set-point (°C)
S Set-point entered by user
L Buildings with very unbalanced loads
M Intermediate situation between L and H (default)
H Buildings with well-distributed loads. High
only on the temperature of the outdoor air.
cycle) or subtracting (summer cycle) an offset value to the set-point used (see examples below).
This function is active both in winter mode and summer mode.
Winter cycle
SC
OS
SI
OS
RT
ST
The user can decide whether to activate the function in both operating modes or in one only. If set-point compensation to outdoor temperature is ena-
bled, the Economy function will be automatically disabled.
Additionally, set-point compensation can be enabled in one cycle and the Economy function in the other.
Precision
100%
RT
T
ST
15°C
25°C
20°C
T (°C) Outdoor air temperature
SC (°C) Calculated set-point temperature
OS (°C) Offset set-point (calculated value)
SI (°C) Entered set-point
RT (°C) Outdoor air temperature set-point compensation
ST (°C) Outdoor temperature set-point
Section I :: User
"Economy" function in Summer mode
y
H
M
L
Precision
S
x
x
y
S
L
M
H
SC
SI
OS
52
Load percentage (%)
Set-point (°C)
Set-point entered by user
Buildings with very unbalanced loads
Intermediate situation between L and H (default)
Buildings with well-distributed loads. High
Summer cycle
RT
ST
OS 8°C
RT 15°C
ST 15°C
100%
x
T