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.
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ENGLISH
EN
7 . 7
D y n a m i c s e t p o i n t f u n c t i o n ( w i t h a n t i - f r e e z e h e a t e r
o n l y )
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
Sd5
Sd1
ST1
Sd3
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.