KKT chillers nBoxX 1.5, Operating Instruction

Page: 23 / 48

23 / 48 83000902.Ka
7.4 7.4 7.4 7.4 Meaning of the control parameters Meaning of the control parameters Meaning of the control parameters Meaning of the control parameters
No. No. No. No. Parameter Parameter Parameter Parameter Min. value Min. value Min. value Min. value Max. value Max. value Max. value Max. value Factory Factory Factory Factory setting setting setting setting Setting Setting Setting Setting Explanation Explanation Explanation Explanation
Fixed value control
Fixed value control Fixed value control
Fixed value control
1
Set point temperature
with fixed value control
10.0°C 30.0°C 20.0°C
If fixed value control is set for parame-
ter 13, the set point temperature can
be selected here.
2
Switching hysteresis
with fixed value control
2 K 5 K 2 K
If fixed value control is set for parame-
ter 13, the switching hysteresis can be
determined here.
Combined control Combined control Combined control Combined control
3
Difference from room tem-
perature
-10.0°C 10.0°C 5.0°C
If combined control is set for parame-
ter 13, the set point temperature can
be set with this parameter as the
difference compared to room tempera-
ture. Negative values result in a set
point above the ambient temperature.
4 Minimum set point 7.0°C P5 10.0°C
If combined control is set for parame-
ter 13, the lower set point can be
limited with this value.
5 Maximum set point P4 35.0°C 28.0°C
If combined control is set for parame-
ter 13, the upper set point can be
limited with this value.
6
Switching hysteresis,
combined control
2 K 5 K 2 K
If combined control is set for parame-
ter 13, the switching hysteresis can be
determined here.
7
Tolerance for error message
"F.01"
3.0°C 15.0°C 5.0°C
If the cooling medium temperature
exceeds the activation temperature of
the compressor by the value set here,
error message F.01 and an alarm are
generated.
8
Heater control
(Medium)
1.0°C
5.0°C
(+ OFF)
OFF
Optional: Optional: Optional: Optional: If a tank heater is installed.
The heater will cut in if the tank tem-
perature drops below the value set
here.
If OFF is set, the heater will never cut
in.
9 Internal real-time clock - - -
One after another, the hour (0 .. 24),
minute (0 .. 59), year (00 .. 99), month
(1 .. 12), day (1 .. 31), summertime
(OFF, EU; USA, S1 .. S12, E1 .. E12)
are displayed.
10
Switching times
Compressor
OFF ON OFF
Select the day of the week (1Mo ..
7Su, ESC), start time (hh, mm), end
time (hh, mm)
11
Switching times
Heater
OFF ON OFF
Only if P8 not OFF.
Select the day of the week (1Mo ..
7Su, ESC), start time (hh, mm), end
time (hh, mm)
12 Lock "1" 1 999 123
To call up parameters P13 .. P19, key