ProMinent
®
Page 18
Controller
4.3.17 Activating Lamp Post-Burn
In large UV disinfection systems used for the disinfection of drinking water, it can take some
time to stop the flow, either by closing the stop valve or by an alternative method. In this case,
allowing the lamp to stay on prevents water that has not been disinfected properly from reaching
the consumer while the UV disinfection system is being switched off. A post-burn phase of
1 minute is usually adequate.
Default setting Off
4.3.18 Setting the Minimum Line Voltage
Line voltage monitoring prevents a drop in the line voltage from causing uncontrolled failure of
the UV system and lamps. If the line voltage falls to the minimum value, the control system goes
into undervoltage mode and the system is switched off. If the line voltage rises above the
minimum value again, the system recommences operation automatically.
NOTE
For systems that are supplied with 3 x 400 V, only one phase is monitored. If the voltage
drops during one of the two phases that are not monitored, the lamp may fail without the
control system reporting the undervoltage.
IMPORTANT
The appropriate customer service department must be consulted before the minimum
supply voltage can be changed.
Default setting 180 V
4.3.19 Pause Function
The UV system can be switched on and off by opening and closing an external contact that is
connected to the pause input of the control system.
The operator has a choice of whether the UV system should commence operation when the
pause contact is open or closed.
Default setting Pause when pause contact closed. The UV system will commence operation when the pause
contact is open.
4.3.20 Displaying/Resetting the Counters
The OPERATING HOURS and TURN-ONS counters cannot be reset.
The LAMP HOURS and LAMP TURN-ONS counters can be reset.
Lamp post-burning
Off
Minimum
Line voltage
180 V
Pause on
Pause contact
closed
Operating hours
400 h
Turn-ons
25
Lamp hours
400 h
Lamp turn-ons
25
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