4
Important notes
Usage for the intended purpose
The level switch NRGS 15-1 is designed for detecting and signalling four different liquid levels and
works for instance in condensate and feedwater tanks, steam boilers and (pressurised) hot-water in-
stallations as water level and switching controller with MIN and MAX alarm.
Function
The level switch NRGS 15-1 is a complete package consisting of a four-tipped level electrode and an
integrated level switching controller. The equipment works only with water having a min. electrical con-
ductivity of > 0.5 μS/cm at 25°C.
A switching channel with time delay, an output relay and a signal LED are assigned to each electrode
tip.
The functions of the switching channels 1 and 4 are fixed, the switchting channels 2 and 3 can be ad-
justed via code switch to suit individual requirements. The tips of the electrode are cut to length on site
in order to establish the desired switchpoints of the associated switching channels.
The following functions are possible:
n
Electrode rod 1 exposed / switching channel 1 energizes relay 1 = low level 1 with optional perfor-
mance test and lock-out function
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Electrode rod 2 exposed / switching channel 2 energizes relay 2 = low level 2
n
Electrode rod 3 exposed or submerged / switching channel 3 energizes relay 3 in a time-controlled
way =timed pump control (fill/discharge control)
n
Electrode rods 2 and 3 exposed or submerged / switching channel 3 energizes relay 3 = on/off pump
control (fill/discharge control)
n
Electrode rod 4 submerged / switching channel 4 energizes relay 4 = high level
