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Notes on safety / Function / Control
•
If solid particles or clouding agents are present in the water to be disinfected, a
suitable filter is to be installed upstream of the disinfection system!
•
Make sure that the maximum permissible operating pressure stated in the enclosed
datasheet is not exceeded!
•
Disconnect from mains supply before mounting and connecting the UV lamps!
•
Switch on the system only after having filled the radiation chamber with water!
NOTE
Please observe the datasheet enclosed with the Dulcodes UV disinfection system!
3
Function
The water to be disinfected flows through the stainless steel radiation chamber along the UV
lamps. The UV radiation safely kills the germs.
The low pressure UV lamps generate a high-yield UV C radiation with a wavelength of 254nm
which is especially effective for disinfection. The lamps are housed in lamp protection tubes
made of high-quality quartz with a high level of UV transparency.
The compact design of the radiation chamber, the optimised flow as well as the in-built
turbulators guarantee an uniform radiation of the entire water flow.
Together with the UV C sensor, the control monitors the UV disinfection system.
The UV lamp is ignited after activating the UV disinfection system. After ignition, it may take
several minutes until the lamp has reached its operating temperature and provides the full UV C
output.
The UV C sensor monitors the lamps. As soon as the sensor signal exceeds the safety
threshold, the shut-off valve (optional) opens.
If the sensor signal does not exceed the safety threshold within 5 minutes, the lamp is
deactivated. The system goes into error mode.
If the system is running, it continues to monitor the UV C output. If the sensor signal drops
below the alarm threshold, an alarm message appears on the display. In case of a drop below
the safety threshold, the shut-off valve (optional) closes. If the sensor signal does not exceed
the safety threshold again within 1 minute, the lamp is deactivated. The system goes into error
mode.
For certain applications, an oxidant has to be added intermittently to the water to be
disinfected. If the added oxidant is highly UV-absorbent (e.g. hydrogen peroxide), the sensor
signal may drop below the safety threshold. In order to prevent that the UV disinfection system
then goes into error mode, the error message can be suppressed. In case of a suppressed error
message, the lamp continues to operate even if the safety threshold is undershot.
4
Control
Version
Because the electronics and software are continuously improved, the version number was
introduced as an identification means. This number is to be stated for inquiries and complaints.
The version number is shown on the display for 2 seconds after having activated the system.
4.1
Display
This system uses a graphical display.
The version number, the operating hours of the control as well as the total number of lamp
activations are shown on the display for 2 seconds after having activated the system.
The standard display shows the UV C output of the UV lamp in Wm
2
, the alarm threshold, the
safety threshold as well as the lamp operating hours and the number of lamp activations.
BA_DS_011_02_07_GB.p65
12.02.2007, 12:03 Uhr
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