AERMEC Multichiller-Evo, User Manual

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INSTALLER - Thresholds and timing - Fixed threshold logic settings
A
B
D
Go back to the submenu selecting page;
Index Meaning
1
Indicates the power threshold that the currently active chiller (or the average of the same, if there is
more than one active chiller) must reach, and maintain for a certain time, for the Multichiller-Evo to
decide to switch-on an additional chiller to provide for the system’s power demand;
2
Indicates the power threshold that the currently active chiller (or the average of the same, if there is
more than one active chiller) must reach, and maintain for a certain time, for the Multichiller-Evo to
decide to switch-off a chiller as the power demand is met;
3
Indicates the time for which the system’s power demand should remain above the value expressed
on “Partialisation ON %” to enable the ignition command of an additional chiller;
4
Indicates the time for which the system’s power demand should remain below the value expressed
on “Partialisation OFF %” to enable the switch-off command of an additional chiller;
5
If all chillers are forced to Off by the direct command on the Multichiller-Evo (page 14), the switch-
offs will be delayed from one another of the time specified in this parameter;
ACTIONS
AVAILABLE:
1
A
C D
2
3
4
Go back to previous page;
Go to alarms menu;
E
F
G
H
Set the power percentage beyond which to ena-
ble the ignition of an additional chiller;
E
F
Set the power percentage above which the chil-
lers that remain on after switching off one of the
active chillers, will work;
5
I
B
C
Go to next page;
G
Set the duration of the power demand, maintai-
ning it above the threshold defined in parameter
(E), to enable the ignition of an additional chiller;
H
Set the duration of the power demand, maintai-
ning it below the threshold defined in parameter
(F), to enable the switch-off of a chiller;
INSTALLER - Thresholds and timing - Optimisation logic settings
A
B
D
Go back to the submenu selecting page;
Index Meaning
1
Indicates the functioning time after which to sample the average of the current power required from
the chillers (calculated in percentage); in order to initiate the optimisation algorithm, this value must
be maintained (possibly deviate of a percentage value of “stable system power %”) for a minimum
time called “Stable power demand interval”;
2
Indicates the minimum duration of the system’s power demand to be considered stable and run the
optimisation algorithm;
3
Indicates the percentage to be added or subtracted from the value sampled at the beginning of the
control to establish the power demand;
4
Indicates the minimum energy gain percentage in order to make effective the chiller configuration
change possibly proposed by the optimisation algorithm
ACTIONS
AVAILABLE:
1
A
C D
2
3
4
Go back to previous page;
Go to alarms menu;
E
F
G
H
Set the interval between sampling to run the op-
timisation algorithm;
E
F
Set the time interval necessary to consider the
power demand stable;
B
C
Go to next page;
G
Set the maximum and minimum percentage va-
riation with respect to the sampled power de-
mand to be able to consider it stable;
H
Set the minimum energy saving percentage du-
ring the possible chiller configuration change to
make the same change effective;
I
Set the interval between switch-offs with the di-
rect command from Multichiller-Evo;