User manual

1592022700 User manual iCHILL 200CX Rel. 1.0 22/04/2009
35 DYNAMIC SETPOINT
The dynamic setpoint allows to increase or decrease the setpoint with a proportional value determined by Sd01 (chiller) and Sd02 (Heat
pump) that depends from the 4..20mA analogue input or from the external air temperature probe. This function allows to save energy or
run the unit when the external ambient is not within the normal operative conditions.
The dynamic setpoint activation is signalled by the SET key led on. When working in Chiller or Heat Pump the first pressure on SET key
shows the actual setpoint SetC (chiller) or SetH (Heat Pump) labels while the top display shows the set value.
If the energy saving is active the next pressure on the SET key shows the label “SEtr” (real setpoint), and the top display shows the
real set value active in that moment.
The regulation is enabled if:
• In chiller mode the parameter Sd01 is not equal to 0.
• In heat pump mode the parameter Sd02 is not equal to 0.
• a 4÷20mA analogue input is configured as dynamic setpoint control or a NTC analogue input is configured as external air
temperature for dynamic setpoint control.
With UP or DOWN keys within the circuit measurement read-out is possible to show the external air temperature indicated by the Et
label.
35.1 DYNAMIC SETPOINT GRAPH
4÷20ma probe configured as dynamic setpoint analogue input:
NTC probe with positive differential:
NTC probe with negative differential: