Function - ProMinent Dulcodes M Operating Instructions Manual

Function

Commissioning
Normal operation
Controlled operation
Wiper
Temperature monitoring
Switching off
Cooling off
Page 6
3 Function
The water to be disinfected flows through the stainless steel radiation chamber alongside the UV
lamp.
The Powerline UV lamp is a highly efficient generator of UVC radiation, which is particularly
effective at disinfecting water. It is housed in a protection tube made of high-grade quartz
through which a high level of UV radiation is able to pass.
The compact design of the radiation chamber and the ideal flow within it enable the water to be
radiated evenly.
The control system and UVC sensor monitor the UV disinfection system.
The UV lamp ignites after the UV disinfection system has been switched on. After ignition, the
lamp requires approximately 1 minute to reach its operating temperature and full UVC capacity.
The UVC sensor monitors the output of the UVC lamp. About 10 seconds after the safety
threshold has been exceeded, the rinsing valve opens and the start rinsing period commences.
If the safety threshold is not exceeded within the maximum warm-up period, two wiper cycles
are triggered and the rinsing valve is opened. If the safety threshold is not exceeded within the
maximum free rinsing period either, the control system switches off the UV disinfection system
and reports a fault.
After the start rinsing period, the stop valve opens and the UV disinfection system commences
normal operation.
During normal operation the UVC sensor continues to monitor UVC output:
If UVC output falls below the warning threshold, a warning signal is given. If UVC output falls
below the safety threshold, the stop valve closes, two wiper cycles are triggered and the rinsing
valve opens. If the safety threshold is not exceeded again within the maximum free rinsing
period, the control system switches off the UV disinfection system and reports a fault.
The lamp is monitored to ensure that it is burning correctly. If the lamp fails, the stop valve
closes and the control system switches off the UV disinfection system and reports a fault.
Using controlled operation, automatic regulation of the radiation output maintains the UV probe
signal at a predetermined value. The reference value is either entered directly into control drive
(operating mode: manual control) or is preset by a variable output signal 0/4-20 mA (operating
mode: external mode)
An automatic motor-driven wiper removes any impurities that settle on the lamp's protective
tube during operation. While the system is running, the wiper moves along the tube at intervals
set by the operator.
If output falls below the safety threshold, two wiper cycles are triggered.
If the UV sensor signal does not exceed the safety threshold during the warm-up period, two
wiper cycles are triggered at the end of the warm-up period.
The temperature of the water in the radiation chamber is monitored continuously while the lamp
is in operation.
As soon as the temperature of the water exceeds the maximum operating temperature, the
rinsing valve opens. If the temperature has not dropped within a preset time, i.e. it still exceeds
the maximum operating temperature the system will report a fault.
If the UV system is switched off, the stop valve closes and the lamp is switched off. If post
burning is required, the lamp will not be switched off until the post burning period is complete.
After the system has been switched off, the Powerline UV lamp cannot be re-ignited until it has
cooled sufficiently. Therefore, the system moves into cooling mode.
If the START/STOP key is pressed during the cooling period, the system will restart
automatically when the remainder of the cooling period has elapsed. Even if the pause status is
cancelled during the cooling period, the system will not start until the cooling period is
complete. (Only for maintenance: An attempt to ignite the lamp can be made during the cooling
period by pressing the enter key).
NOTE
The radiation chamber cannot be emptied in order to carry out maintenance until the
cooling period has elapsed.
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