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4.3.12 Activating Pump Control
The pump control must be activated in order to drive a delivery pump with the pump relay.
The pump relay is in dropped-out state when the system is switched off and remains in
dropped-out state with the pump control “OFF” even when the system is running.
When the system is switched on with the pump control ON, the system will exit the warm-up
phase on exceeding the warning threshold. The pump relay picks up.
The pump relay drops out when the system is switched off or when the system assumes pause
state.
If the safety threshold is undershot during operation or if a UV lamp fails, the pump relay will drop
out and the system assumes flow mode.
Presetting
OFF
ATTENTION!
The UV system may be operated only with the radiation chamber completely filled with
water. With the radiation chamber empty or only partially filled there is the risk of damaging
the UV lamps and radiation chamber. Particular care must therefore be taken to ensure that
the radiation chamber cannot run empty while the pump is switched off.
IMPORTANT!
Start-up, clear and intermittent flushing are not possible with the pump control “ON”.
The corresponding programming windows are therefore blanked out.
IMPORTANT!
Since, in most cases, the delivery pump has a certain afterrunning period, the lamp
afterglow time should be set to at least 1 minute in applications requiring a high degree of
disinfection reliability.
4.3.13 Setting Start-Up Flushing Time
The aim of start-up flushing is to ensure that only perfectly treated water flows to the consumer.
The automatic flushing valve (if fitted) for start-up flushing opens as soon as the UV lamps have
reached operating temperature after ignition and the sensor signal is above the safety threshold.
Only then does the shut-off valve open.
IMPORTANT!
A start-up flushing period of 1 minute is sufficient in the majority of cases.
The start-up flushing period can be set to 0 min if no flushing valve is installed.
Presetting
1 min
Start-Up
Flushing time
1 min
Control
Pump control
OFF
