Flowserve NRGS15-1 - Manual (Page 9)

9
Explanatory Notes
Scope of supply
NRGS 15-1
■ 1 Level electrode with four tips
■ 1 Terminal box with integrated level switch
■ 1 Joint ring Ø 33x 39 to DIN 7603, made of 1.4301 E8P
■ 1 Installation manual
or
NRGS 15-1
■ 1 Level electrode with four tips
■ 1 Terminal box with integrated level switch and built-in Test and Reset pushbutton
■ 1 Joint ring Ø 33x 39 to DIN 7603, made of 1.4301 E8P
■ 1 Installation manual
Function
The level switch NRGS 15-1 is a compact-type system consisting of a level electrode
with four tips and an integrated level switch. For the correct functioning of the equipment
the water must have a minimum conductivity of > 0.5µS/cm at 25°C.
In the integrated level switch a time-delayed switching channel, an output relay and a
signal LED are assigned to each one of the four electrode tips.
The functions of the switching channels 1 and 4 are fixed, the switchting channels 2 and
3 can be adjusted 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:
■ Electrode rod 1 exposed / switching channel 1 energizes relay 1 = low level 1 with
optional performance test and lock-out function
■ Electrode rod 2 exposed / switching channel 2 energizes relay 2 = low level 2
■ Electrode rod 3 exposed or submerged / switching channel 3 energizes relay 3 as a
function of time = timed pump control (fill/discharge control)
■ Electrode rod 3 exposed or submerged / switching channel 3 energizes relay 3
= on/off pump control (fill/discharge control)
■ Electrode rod 4 submerged / switching channel 4 energizes relay 4 = high level