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6. Special Functions
Used to set basic items and expanded functions.
The settings in this menu should only be changed by a specialist.
Program selection
Here the hydraulic variation fitting to the respective use case is selected and set.
The program selection normally occurs only once during the first entry into service by a specialist. An incorrect pro-
gram selection may lead to unpredictable errors.
Pump settings V1/ Signal V1
In this menu, the settings for the speed controlled output V1 are executed.
Type of pump/ Type of signal
The type of speed controlled pump used can be set here.
0-10V: Control of special pumps (e.g. high efficiency pumps) through a 0-10V signal.
PWM: Control of special pumps (e.g. high efficiency pumps) through a PWM signal.
Pump/ Profile
In this menu, the preset profiles for the pump can be selected or under “manual all settings can be done personally. The settings
can still be changed after a profile has been selected.
Output Signal
In this menu, the type of pump is set: heating pumps have the greatest output with a small input signal, solar pumps in contrast
have very little output with a small input signal. Solar = normal, heating = inverted.
PWM / 0-10V off
This signal / this voltage is emitted if the pump is turned off (pumps with cable break detection require a minimal voltage / a min-
imum signal).
PWM / 0-10V on
This voltage / this signal requires the pump in order to turn on and to run at a minimum speed.
PWM / 0-10V max.
With this value, the maximum voltage level / maximum frequency can be specified for the highest speed of the energy saving
pump, which is used, for example, during the flushing or manual operation.
Show signal
Represents the set pump signal in a graphic and text overview.
Speed control
If the speed control is activated, itLTDC-E offers the possibility through a special internal electronic system to change the speed of
pumps depending on the process. The relay R1, R2 and the Pwm and 0-10V outputs can work with the speed controlled.
This function should only be activated by a technician. Depending on the pump being used and the pump level, the
minimum speed may not be set too small, because the pump or the system may be damaged. The specifications from
the affected manufacturer must be observed for this! When in doubt, the min. speed and the pump level should be set
too high instead of too low.
Variant
The following speed variants are available here:
Off: There is no speed regulation. The connected pump is only turned on or off with full speed.
Mode M1: The controller changes to the set max. speed after the purging time. If the temperature difference ∆T between the ref-
erence sensors is below the set switch on temperature difference ∆T R1, the speed will be reduced. If the temperature difference
between the reference sensors is above the set switch on temperature difference ∆T R1, the speed will be increased. If the con-
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