6.4.6 Functions of keys in
[Free rinse] mode
Free rinsing takes place when operating the UV system if the level
has fallen below the minimum radiation intensity (= safety
threshold) for instance due to turbidity in the water flow. Should the
level fall below the minimum radiation intensity, the shut-off valve
(1) closes, see Fig. 3 and the rinse valve (2) opens for the set time.
The water flow is diverted to the sewage system. If during the free
rinsing time, the minimum radiation intensity is exceeded by ≥ 2%,
the UV system switches to normal mode again (Warning status).
The rinse valve closes and the shut-off valve opens.
A wiping cycle is performed at the start of the
[Free rinse]. The free
rinse time only starts at the end of the wiping cycle. If there is a
wiper fault, the wiping cycle is omitted and the free rinse time starts
immediately. If during the
[Free rinse] a further wiping cycle is trig‐
gered, then the free rinsing period does not continue during the
wiping cycle.
A1188
STOP
Fault
Menu
Wiper cycle
Control
INT
Time 00:02
Lamp power 1x979 W
Lamp ON
UV intensity
UV intensity
Rinsing valve open
450 W/m
2
500 W/m
2
Fig. 16: The UV system is displayed in [Free rinse] status until the
wiping cycle has been completed.
A1186
24.12.2019
10:06:53
STOP
Fault
Menu
UV dose
600 J/m
2
498 W/m
2
Control
500 W/m
2
INT
Time 02:12
Lamp power 1x979 W
Lamp ON
UV intensity
UV intensity
Trend
Wiper
Rinse valve open
Fig. 17: The UV system display in [Free rinse] status. The mes‐
sage [Rinse valve open] appears in the display.
Tab. 8: The following functions can be selected:
Key
Function
When the function is selected and Enter is pressed:
[F1]
[STOP]
Switches off the UV system.
[F4]
[Fault]
Warnings and errors are displayed.
Control
29
