Overfill Protection Switch (Ops) For The Raw Water Tank; Run-Dry Protection Switch (Rps) - WaterBackpack PAUL Manual

PAUL station manual page 16
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In standard operation, fix the end of the hose higher than PAUL is, so no water will flow out
of the hose. As the hose is transparent, you can exactly see and observe the water level in-
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side PAUL . This is the "simple and no energy" version which in most cases makes the op-
tional LWS unnecessary.
If flushing must be performed, lower the outlet of the hose so water and slurry can flush out of
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PAUL .
Of course any other solution offering the same functionality is also possible.

4.5 Overfill Protection Switch (OPS) for the Raw Water Tank

The Overfill Protection Switch (OPS) is to be installed in the RWT. This switch determines the
maximum water level at which the feed pump must be switched off. By this, overfilling of the
RWT will be prevented.
Concerning the necessary connections, please refer to the instructions provided with the
OPS. The black wire is the zero connector. We recommend to test whether the blue or the
brown wire is to be used besides the black wire.

4.6 Run-Dry Protection Switch (RPS)

It is highly recommended to prevent the feed pump that is used for raw water pumping from
running dry. This can be done by using a Run-dry Protection Switch (RPS) and realize the
wiring according to this task, which means that the black wire is used and the second wire to
be used is the opposite one compared with the wiring needed for overfill prevention at the
OPS. We recommend to test whether the blue or the brown wire is to be used besides the
black wire.
PAUL Station Manual 2019-05-25 25.05.2019