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Dulcodes UV-Desinfektionsanlage
4.3.14
Setting Maximum Clear Flushing Time
Clear flushing is mainly used for drinking water disinfection where maximum clear flushing times
of more than 10 hours are often implemented. The shut-off valve will close and the flushing valve
open if in bodies of water that have only weak natural filtering properties, the UV transmission in
ground water or spring water deteriorates after heavy rainfall to such an extent that the UV-C
sensor signal drops below the safety threshold. Normal operation of the UV disinfection system
will be restored as soon as the water quality has improved. The UV disinfection system will
switch to flow mode if the UV-C sensor signal does not rise above the safety threshold again
within the maximum clear flushing time.
Default
1 min
4.3.15
Setting Lamp Afterglow
In large UV disinfection systems for drinking water disinfection it is possible that a longer period
of time may elapse until the shut-off valve closes or the water flow is otherwise interrupted. In
this case, the lamp afterglow function prevents water that has not been properly disinfected from
reaching the consumer while the UV disinfection system is switched off.
A lamp afterglow period of 1 minute is sufficient in the majority of cases.
Default
OFF
4.3.16
Setting Standstill and Intermittent Flushing Time
Standstill flushing is used particularly for the own supply of drinking water. Long periods of
time without tapping off water can be assumed in connection with UV disinfection systems in
self-supply applications. In such cases, standstill flushing is recommended in order to avoid
impermissible overheating and radiation of the water.
If a flow control instrument whose contact closes on exceeding a minimum flow rate is
connected to the FLOW switched input of the control, the flushing valve will be opened for the
intermittent flushing period if no water is tapped off within the maximum standstill period.
If no flow control instrument is connected to the FLOW switched input of the control, i.e. the
input is open, the flushing valve will open for the set intermittent flushing time after the maximum
standstill period (periodic flushing).
A maximum standstill flushing period of 5 hours is set in most cases. An intermittent flushing time
of 1 minute is normally sufficient.
No intermittent flushing occurs if the maximum standstill period is set to 00:00.
Default
00:00 h:min
1 min
Lamp
afterglow
OFF
Intermittent
flushing time
0 min
Maximum
standstill time
00:00 h:min
Control
Maximum clear
flushing time
00:01 h:min
BA_DS_009_10_06_GB.p65
20.10.2006, 7:31 Uhr
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