C
on
tr
ol & o
ver
vie
w
s
C
on
tr
ol & o
ver
vie
w
s
Xp
1
1
1
ON
2
8
4
8
3
ON
8
8
2
0
1
2
ON
Actual Xp
Xp
2
4 Proportional band, Xp
Circuit
Setting range
Factory setting
III
1 ... 250 K
88 K / 102 K
Set the proportional band.
A higher value will result in a stable but slow
control of the flow temperature.
If you want to adjust Xp
1
and Xp
2
, push the shift
button once or twice.
65
90
Xp
Xp
Xp
C
o
2
1
Xp is a function of the supply temperature sensor
S7. If the sensor S7 is not connected, the Xp value
will equal Xp
1
.
5 Integration time constant, Tn
Circuit
Setting range
Factory setting
III
5 ... 999 sec.
16 sec.
Set a high integration time constant to obtain a
slow but stable reaction to deviations.
A small integration constant will make the
controller react fast but with less stability
6 Running time of the motorized control valve
Circuit
Setting range
Factory setting
III
5 ... 250 sec.
15 sec.
Set the running time of the motorized control
valve. This is the time it takes the controlled unit to
move from fully closed to fully open position.
Control parameters -
lines 4-7, circuit III
27a
7 Neutral zone, Nz
Circuit
Setting range
Factory setting
III
0 ... 9 K
3 K
Set the neutral zone to a high value if you can
accept a high variation in flow temperature.
When the actual flow temperature is within the
neutral zone, the controller does not activate the
motorized valve.
The neutral zone is symmetrical around the desired flow
temperature value, i.e. half the value is above and half the value is
below this temperature.
27b
