Connection Of Additional Protections: High Pressure, Low Pressure And Motor Thermal Protection; Connection Of The Alarm Outputs; Figure 8: Inputs And Outputs; Figure 9: Thermal Protection Inputs Kk - DAB E.Box Plus Installations- Und Wartungsanleitungen

5.3

Connection of additional protections: high pressure, low pressure and motor thermal protection

It is possible, but not necessary, to use the alarm inputs to the E.box so that the pumps stop in the case of pressure that is too high, too low, or
too high motor temperature. In the case of an alarm, the pumps stop, the alarm leds blink, the corresponding alarm outputs are activated. If the
display is present, the type of alarm is indicated. When the alarm conditions no longer exist, the E.box resumes normal operation.
Alarm, Pressure in system too high: the pressure switch must be installed in the delivery of the set. The normally closed contact of
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the pressure switch must be connected to terminal R of the E.box. The pressure switch must be set at the maximum pressure that can
be reached by the system. If it is not used, the contact is jumpered.
Alarm, Pressure in system too low: the pressure switch can be installed either on suction or on delivery depending on the type of
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system. The pressure switch must be connected to terminal N of the E.box, it must be set at the minimum pressure necessary for the
system to work correctly. The contact must open if the pressure falls below the minimum value. This contact may be used either to
prevent blocks for lack of water or to discover burst pipes. A level probe or float can also be connected to this alarm to check the state
of a tank or well. If it is not used, the contact is jumpered.
Motor thermal protection: the device has an input for the thermal protection of each motor. If the motor used is provided with thermal
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protection, this protection can be connected to the terminals KK shown in Figure 9. If there is no protection in the motor, the terminals
must be jumpered.
If the alarms are not used, the corresponding inputs must be jumpered. So jumpers must be fitted on the inputs of the contacts N, R, KK1 and
KK2. These jumpers are provided with the E-box.
5.4

Connection of the alarm outputs

If alarms occur, this is indicated by the E.box in three ways:
With the leds on the front panel, which give a number of blinks depending on the error.
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With the outputs Q1, Q2, Q3 which short circuit as specified in Table 17. The operating logic of the alarms is as follows: Q1
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closes following malfunctions of pump 1, Q2 of pump 2 and Q3 for general errors.
With the indications on the display (if present). In this case it is also possible to see the alarm log.
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If the panel is not fed, Q1, Q2 and Q3 are closed, so they give an alarm signal.
ENGLISH

Figure 8: Inputs and outputs

Figure 9: Thermal protection inputs KK

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