37
12.9 Speed control
menu 7.9
If the speed control is activated, the TDC5 makes it possible to vary
the speed of standard pumps at relay R1 by means of special internal
electronics.
This function should only be activated by a specialist. Depending
on the pump and pump stage used, the minimum speed should
not be set too low, because otherwise the pump or the system may
Special functions
menu 7
12
12
The following speed variants are available here:
Off
: There is no speed control. The connected pump is only switched on
or off with full speed.
Variant V1: After the purging time the controller switches to the set max.
speed. If the temperature difference
∆
T between the reference sensors
(collector and storage tank) is less than the set value, then the speed is
decreased by one stage after the control time elapses. If the tempera-
ture difference between the reference sensors is greater than the set
value, then the speed is increased by one stage after the control time
elapses. If the controller has adjusted the speed of the pump down to
the smallest stage and the
∆
T between the reference sensors is still
only 1/3 of the set value, then the pump is switched off.
Variant V2
: After the purging time the controller switches to the set min.
speed. If the temperature difference
∆
T between the reference sen-
sors (collector and storage tank) is greater than the set value, then the
speed is increased by one stage after the control time elapses. If the
temperature difference
∆
T between the reference sensors is below the
set value, then the speed is decreased by one stage after the control
time elapses. If the controller has adjusted the speed of the pump down
to the smallest stage and the
∆
T between the reference sensors is still
only 1/3 of the set value, then the pump is switched off.
Variant V3
: After the purging time the controller switches to the set min.
speed. If the temperature at the reference sensor (collector) is greater
than the setpoint to be set subsequently, then the speed is increased by
one stage after the control time expires. If the temperature at the refer-
ence sensor (collector) is less than the setpoint to be set subsequently,
then the speed is decreased by one stage after the control time expires.
Setting range: V1,V2,V3, off/default setting: off
12.9.1 Variant
menu 7.9.1
be damaged. The information provided by the relevant manufacturer must
also be observed! If in doubt, the min. speed and the pump stage should
generally be set to high rather than too low.
Caution
