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Grundfos DDA 7.5-16 User Manual

Grundfos DDA 7.5-16
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English (GB)
26
6.4.5 Dosing timer cycle
In this operation mode, the pump doses the
set batch volume in regular cycles.
Dosing starts when the pump is started after a
singular start delay. The setting range for the batch
volume corresponds to the values in section
6.4.4 Batch (pulse-based).
Fig. 25 Dosing timer cycle diagram
In the event of an interruption (e.g. interruption of the
mains voltage, External stop), the dosing will be
stopped while the time continues running.
After suspending the interruption, the pump will
continue to dose according to the actual timeline
position.
The following settings are required in the "Setup >
Dosing timer cycle" menu:
Fig. 26 Dosing timer cycle
The batch volume to be dosed (e.g. 125 ml) is set in
the "Setup > Dosing timer cycle" menu. The dosing
time required for this (e.g. 1:54) is displayed and can
be changed.
The total batch volume (e.g. 125 ml) and the
remaining batch volume still to be dosed are
displayed in the "Operation" menu. During breaks in
dosing, the time until the next dosing process
(e.g. 1:21) is displayed.
Fig. 27 Dosing timer cycle
6.4.6 Dosing timer week
In this operation mode, up to 16 dosing
procedures are defined for a week.
These dosing procedures may take place regularly
on one or several week days. The setting range for
the batch volume corresponds to the values in
section 6.4.4 Batch (pulse-based).
Fig. 28 Example for Dosing timer week function
In the event of an interruption (e.g. disconnection of
the mains voltage, External stop), the dosing is
stopped while the time continues running.
After suspending the interruption, the pump
continues to dose according to the actual timeline
position.
Warning
When time or date is changed in
"
Time+date
" menu, timer dosing and
timer relay output functions (Relay 2)
are stopped!
Timer dosing and timer relay output
functions must be restarted manually!
Changing time or date can cause
increase or decrease in concentration!
TM04 1107 1109
t
1
Dosing time
t
2
Start delay
t
3
Cycle time
TM04 1137 1110
t
1
t
1
t
2
t
3
Batch volume
Timer
125ml
1:54
3:00
2:00
Batch volume
Dosing time[mm:ss]
Cycle time[mm:ss]
Start delay[mm:ss]
TM04 1136 2011
Warning
When time or date is changed in
"
Time+date
" menu, timer dosing and
timer relay output functions (Relay 2)
are stopped!
Timer dosing and timer relay output
functions must be restarted manually!
Changing time or date can cause
increase or decrease in concentration!
TM04 1108 1109
Note
If several procedures overlap, the
process with the higher dosing flow has
priority!
Operation
125
ml
Timer
1:21
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Grundfos DDA 7.5-16 Specifications

General IconGeneral
Max Flow Rate7.5 l/h
Max Pressure16 bar
Protection ClassIP65
Operating Temperature0°C to +45°C
Analogue Control4-20 mA
Pulse ControlYes
Level ControlYes
Power Supply100-240 V, 50/60 Hz
MaterialStainless Steel

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