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.
Mode M4 (2 storage system):
When the primary storage is loaded, speed control works as in M3. When the secondary storage is loaded, speed control works
as in M1.
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.
Setpoint
This value is the control setpoint for mode 3 see " Variant " on page 20, only version 2.3, and 4.. If this value is below at the
sensor, the speed is reduced. When it is exceeded, the speed is increased.
Relay functions
Free, i.e. in the specific hydraulic variant unused relays, can be assigned to various additional functions. Every additional function
can only be assigned once.
R1 to R2: mechanical relay 230V
R3: Alternating contact 230 V
V1 and V2: PWM and 0-10 V outputs see " External relay at signal output V(X) (0-10V / PWM) " on page 32
Please pay special attention to the relay’s technical information (see "Specifications“).
The symbols shown here are displayed on the main overview screen when the special function is activated.
The sequence in this list does not correspond to the menu numbering in the controller.
Solar bypass
Use a relay to switch a bypass valve or a bypass pump. With this function, the flow can be guided past the storage if the flow tem-
perature at the bypass sensor is less than in the storage to be filled.
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