CLIVET TALK User Manual

Data creazione 10/09/03 DS03I009GB--00 Pagina 56 di 59
DEMAND LIMIT
Enabling the DEMAND LIMIT function limits the capacity delivered so as to contain the power consumed by
the unit.
Configuration parameters:
Description Limits UO
M
Default Pass Add.
Enable demand limit DemandLimitEn NO - YES Flag NO 1
D.L. reaction time TReation 0 - 999 Sec 5 1
Control logic:
The number of compressors available to the unit to satisfy the heating or cooling requirements is determined
based on a 0-10Vdc / 4-20mA signal connected to the Demand Limit analogue input. The higher the value
of the signal, the less capacity will be available to the system, as highlighted in the graphs below.
EXAMPLES
UNIT WITH 6 COMPRESSORS
Capacity delivered
Segale 0-10Vcc
C1
C4
C3
C2
1.6 3.2 4.8 6.4
3 Com
p
.
available
4 Com
p
.
available
5 Com
p
.
available
6 Com
p
.
available
2 Comp.
available
1 Com
p
.
available
8.2
C6
C5
NOTE
As the 0-10Vdc/4..20mA signal changes, to avoid
unwanted and continuous changes in the number of
resources available to the temperature controller, a
time = “Treation” is considered, in which the signal
must remain stable above the step activation or
deactivation threshold before modifying the
percentage of capacity available to the system.
UNIT WITH 4 COMPRESSORS
Capacity delivered
Segale 0-10Vcc
C1
C4
C3
C2
2.5 5.0 7.5 10.0
1 Comp
available
2 Comp
available
3 Comp.
available
4 Comp.
available
NOTE
As the 0-10Vdc/4..20mA signal changes, to avoid
unwanted and continuous changes in the number of
resources available to the temperature controller, a
time = “Treation” is considered, in which the signal
must remain stable above the step activation or
deactivation threshold before modifying the
percentage of capacity available to the system.
0-10Vdc signal
0-10Vdc signal

CLIVET TALK Specifications

General

Brand	CLIVET
Model	TALK
Category	Controller
Language	English