ICS iC 215 - Dynamic Setpoint Function

OPERATING AND MAINTENANCE MANUAL
Chapter 7 - Electronic controller
iC 215 ÷ iC 780
34
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
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7.7 Dynamic setpoint function (with anti-freeze heater
only)
The regulator allows the operating setpoint to be modified by adding or subtracting a coefficient proportional to the external
air temperature.
For industrial applications, the purpose of this function is to prevent condensate from forming on the surface of the
component cooled by the unit.
The operating setpoint increases proportionally as the ambient temperature rises; the difference between the ambient
temperature and the operating setpoint is a value which can be set by means of parameter Sd03, with values from -5 to +5°C.
To activate the function, set the following parameters:
Chiller setpoint ST01= 0°C
Max. increase in dynamic setpoint Sd01= 30°C
Temperature differential between external air and dynamic setpoint Sd05= 30°C
External air temperature - dynamic setpoint delta Sd03= -5 to +5°C
The graphs below illustrate operation of the dynamic setpoint (SEtr) with Sd03 set at 4°C and -4°C.
For example, with ambient T of 24°C the operating setpoint SEtr= 20°C in case 1 and SEtr= 28°C in case 2.
Case 1 - Sd03= 4
Case 2 - Sd03= -4
SEtr
0
4
10
20
24
30
40
50
40
30
20
10
0
Sd
5
Sd1
S
T
1
S
d
3
Ambient air T.
SEtr
-
4
0
10
20
24
30 40
50
40
30
28
20
10
0
Sd5
Sd1
ST1
Sd3
Ambient air T.