ClearFox®Control Unit CU-M
13
Aeration 2 (4min ON / 6min OFF) – via valve on Out 4 – optional aeration of another part of
the reactor or the sludge tank.
after one ON/OFF cycle jump to Aeration 1
If Aeration 2 shall not be used, it can be deactivated via the web pages:
Figure 6: One-Tank SBR program individualization via internal web pages
Sludge return
Time taken from the settling time – example: Settling = 2h, sludge = 2min => settling will be
1:58h in reality and sludge 2min – sludge return before settling can be deactivate via a
parameter via the Patch file (please ask PPU in case you want to deactivate it). All sludge
returns have the same step times.
Max. step duration that can be entered is 30min., default step duration is 0min (!)
Settling (1.5h)
OPTIONAL Sludge return
This sludge return can be activated via a parameter via the Patch file (please ask PPU in
case you want to activate it)
Time taken from the settling time – example: Settling = 2h, sludge = 2min => settling will be
1:58h in reality and sludge 2min – sludge return after settling can be deactivate via a
parameter via the Patch file. All sludge returns have the same step times.
Max. step duration that can be entered is 30min., default step duration is 0min (!)
Clearwater removal
Max. step duration that can be entered is 1h., default duration is 15min
OPTIONAL Sludge return
This sludge return can be activated via a parameter via the Patch file (please ask PPU in
case you want to activate it)
Time taken from the settling time – example: Settling = 2h, sludge = 2min => settling will be
1:58h in reality and sludge 2min – sludge return after clearwater can be deactivate via a
parameter via the Patch file. All sludge returns have the same step times.
Max. step duration that can be entered is 30min., default step duration is 0min (!)
Water level measurement
Via CW (only if calibrated!) – must be below “calibrated value + offset”. Else overfill alarm.
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