English (GB)
18
The status LEDs indicate the following operating
statuses and faults:
* only DDE-PR/P control variant
6.2 Operation modes
Following operation modes are available:
• Manual, see section 6.2.1
• Pulse *, see section 6.2.2
* Applies to DDE-PR/P control variant.
6.2.1 Manual
In this operation mode, the pump doses constantly
the dosing quantity set by the adjustment knob.
The setting range depends on the pump type:
6.2.2 Pulse
Applies to DDE-PR/P control variant.
In this operation mode, the pump doses the set
dosing volume for each incoming (potential-free)
pulse, e.g. from a water meter. The pump
automatically calculates the optimum stroke
frequency for dosing the set volume per pulse.
The calculation is based on:
• the frequency of external pulses
• the set stroke volume in percent.
The dosing quantity per pulse is set to a value
between 0.1 % and 100 % of the stroke volume using
the adjustment knob.
The setting range depends on the pump type:
The frequency of incoming pulses is multiplied by the
set dosing volume. If the pump receives more pulses
than it can process at the maximum dosing flow, it
runs at the maximum stroke frequency in continuous
operation. Excess pulses will be ignored.
6.2.3 Change operation modes
Applies to DDE-PR/P control variant.
1. Set adjustment knob to 0 %.
2. Connect mains supply
(see section 4.3 Electrical connection).
3. Hold down the [Operation mode] key for at least
5 seconds.
The new operation mode is saved.
6.3 Inputs/outputs
Applies to DDE-PR/P control variant.
6.3.1 External stop
The pump can be stopped via an external pulse, e.g.
from a control room. When activating the external
stop pulse, the pump switches from the operating
state "Running" into the operating state "Standby".
According to the selected operation mode, the
respective LED flashes red-green.
6.3.2 Empty and low-level signals
In order to monitor the filling level in the tank, a
dual-level sensor can be connected to the pump.
The pump responds to the signals as follows:
LED colour Pump status/fault
Green (flashing) stop
Green running
Red-green
(flashing)
standby (external stopped) *
Yellow low-level signal *
Red empty signal, pump stops *
Red (flashing) motor blocked, pump stops
Type Setting range [l/h]
DDE 6-10 0.0060 - 6
DDE 15-4 0.0150 - 15
Type Setting range [ml/pulse]
DDE 6-10 0.0008 - 0.81
DDE 15-4 0.0016 - 1.58
Sensor signal Pump status
Low level
• LED lights up in yellow
• Pump continues running
Empty
• LED lights up in red
• Pump stops
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