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troller has decreased the speed of the pump to the smallest level and the ∆T between the reference sensors is still only Toff, the
pump will be turned off.
Mode M2: The controller changes to the set min. speed after the Speed. If the temperature difference ∆T between the reference
sensors is above the set switch on temperature difference ∆T R1, the speed will be increased. If the temperature difference ∆T
between the reference sensors is below the set switch on temperature difference ∆T R1, the speed will be reduced. If the con-
troller has decreased the speed of the pump to the smallest level and the ∆T between the reference sensors is still only Toff, the
pump will be turned off.
Mode M3: The controller changes to the set min. speed after the Speed. If the temperature on the reference sensors is above the
set value to be set in the following, the speed will be increased. If the temperature on the reference sensors is below the set value
to be set in the following, the speed will be reduced.
Purging time
For this time, the pump runs with its full speed (100%) in order to guarantee a secure start-up. Only after expiration of this purging
time will the pump have a controlled speed and will switch, depending on the set variant, to the max. or min. speed. Speed.
Sweep time
With the control time, the inertia of the speed control is determined in order to prevent strong temperature deviations as much as
possible. The timespan is entered here, which is needed for a complete cycle from minimum speed to maximum speed.
Max. Speed
The maximum speed of the pump is determined here. During the setting, the pump runs in the respective speed and the flow can
be determined.
The specified percentages are variables, which may deviate more or less strongly depending on the system, pump
and pump level. 100% is the maximum possible power of the controller.
Min. Speed
The minimum speed of the pump is determined here. During the setting, the pump runs in the respective speed and the flow can
be determined.
The specified percentages are variables, which may deviate more or less strongly depending on the system, pump
and pump level. 100% is the maximum possible power of the controller.
Heat quantity
Constant flow
If “Constant flow is activated as the type of heat quantity metering, the approximate heat from the manually entered values for
antifreeze, its concentration and the flow from the system and the measured sensor values from the collector and storage are cal-
culated. Additional information about antifreeze, its concentration and the flow of the system is required. Additionally through the
setting offset ∆T, a correction factor can be set for the heat quantity collection. Since the collector temperature and the storage tem-
perature can be used for the heat quantity metering, depending on the system, there may be deviations from the displayed col-
lected temperature to the actual previous temperature or the displayed storage temperature to the actual return temperature.
Through the setting Offset ∆T, this deviation can be corrected.
Example: displayed collector temperature 40°C, read previous temperature 39°C, displayed storage temperature 30°C, read
return temperature 31° means a setting of -20% (displayed ∆T 10K, actual ∆T 8K => -20% correction value)
The heat quantity data in the “Constant flow mode only consists of calculated values for the functional inspection of
the system.
Sensor Calibration
Deviations in the temperature values displayed, for example. due to cables which are too long or sensors which are not posi-
tioned optimally can be compensated for manually here. The settings can be made for each individual sensor in steps of 0.5 °C.
Settings are only necessary in special cases at the time of initial commissioning by the specialist. Incorrect meas-
urement values can lead to unpredictable errors.
Commissioning
Starting commissioning help guides you in the correct order through the basic settings necessary for commissioning, and
provides brief descriptions of each parameter in the display. Pressing the esc‘ key takes you back to the previous value so you
can look at the selected setting again or adjust it if desired. Pressing esc‘ more than once takes you back to the selection mode,
thus cancelling the commissioning help see " Commissioning help " on page 11
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