ENSIM SENSORS ISS 04 Operating Manual page 8

F3.Fill Control + 2 pcs Low Level Alarm
The electrod tips 1..4 act as Low Level1, Low Level2, Pump-ON, Pump-OFF respectively.
The lengths of two low level electrodes are equal or very near as a convention. This is not an obligation on the other hand.
Recommended minimal distance between Pump-ON..Pump-OFF electrodes is 50-80mm(Dead band)
related to the tonnage of the boiler (bigger the boiler – shorter the distance). Make it bigger if you
want less frequent pump action.
F4.Descharge Control + 1 pcs Empty Alarm + 1 pcs Full Alarm
This configuration is likely “inverse of ConfigurationII”.
Electrodes 4..1 act as FULL(H-level), Pump-ON, Pump-OFF and EMPTY(Low Level) respectively.
The comments are valid about the dead band of pump-control at the preceding page.
There is no High Level Alarm at this configuration,
you can use pump-OFF relay to catch the levels over
this level though.
(Relay-4 remains activated at levels higher than P.off).
Figure 10
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Figure 11