Installation, operating and maintenance manual SKIT/S-DEB
3rd print version
page 25
3 – Design and function
RWO GmbH
●
Marine Water Technology
●
Bremen
●
Germany
Issue 2014-04-10
Note
A special function allows for an oil simulation with
the -/+ buttons. Press both buttons simultaneously
for at least 2 seconds to run an oil simulation. The
evaluation electronics receives a fake interruption
signal at both electrodes.
·
Enter button
The Enter button serves as "Continue" or "Confirm"
button. In the menu structure, pressing the Enter
buttons switches to the next menu item or confirms
a selection done right before with the –/+ buttons.
LCD display
3.15.4
The twenty-digit,
two-line LCD can
display operating
states and menu
guidance either in German or in English. The start
message shows: RWO Water Technology and a software
version number.
The display motherboard contains a potentiometer to
adjust the contrast of the LCD to the lighting conditions.
Fig. 5 Potentiometer
3.16
Control functions
Oil detection and oil discharge
3.16.1
In the upper calming zone of the oil separator the
separated oil is collected. The RWO level automatic
measures the accumulated oil level with a three-rod
sensor electrode (pos. 9). During the oil collection phase,
the status LED is green.
As soon as a specified amount of oil has been collected,
the RWO automatic level system (pos. 3) opens the oil
drain valve (pos. 4) and the flushing water inlet valve
(pos. 15) so that the oil is discharged to the oil collector
tank by means of the flushing water pressure. During this
time, the status LED is red.
This stage is followed by the backflush process. The
high-performance coalescer is flushed with clean water
by opening both the flushing water inlet valve (pos. 15)
and the flushing water outlet valve (pos. 5). During this
time, the status LED is orange.
If the RWO automatic level system detects an illogical
signal input, e. g. the short rod electrode detects a
conductive medium (water) while the long rod electrode
detects a non-conductive medium (oil), the system
