5
Function
The NRGS 11-2, NRGS 16-2 is a compact-type system consisting of a level electrode with four tips and
an integrated level switching controller. For the correct functioning of the equipment the water must
have a minimum conductivity of >0.5 µS/cm at 25 °C.
The length of the individual electrode tips determines the switchpoints for the respective water levels.
The equipment monitors the water level by sensing whether the electrode tips are exposed or im-
mersed and - by energizing or de-energizing the controller output contact - switches the feedwater
pump on or off. The LED for pump is illuminated when the equipment switches the feedwater pump on.
When the water level falls below the low level, the two MIN electrode tips are exposed and after the
de-energizing delay the equipment switches the MIN output contacts. The safety circuit for the heating
will be opened after the de-energizing delay and the two MIN LED are illuminated.
A MIN alarm can be simulated by pressing the test button.
The heating will be switched off and interlocked. To reset the interlock the MIN electrode tips must
enter the water again and the button “Reset” must be pushed.
Explanatory Notes
Scope of supply
NRGS 11-2
1 Compact system NRGS 11-2
1 Joint ring D 33 x 39 DIN 7603-1.4301,
bright annealed
1 Installation manual
NRGS 16-2
1 Compact system NRGS 16-2
1 Joint ring D 33 x 39 DIN 7603-1.4301,
bright annealed
1 Installation manual
NRGS 11-2, NRGS 16-2
Technical data
Type approval no.
TÜV · WR/WB · xx-392
Service pressure
NRGS 11-2: 6 bar at 159 °C, NRGS 16-2: 32 barg at 238 °C
Mechanical connection
Screwed G 1,
EN ISO 228-1
Materials
Terminal box
3.2161 G AlSi8Cu3
Sheath
1.4301 X5 CrNi18-10
Screw-in body
1.4571 X6 CrNiMoTi17-12-2
Electrode tips
1.4571 X6 CrNiMoTi17-12-2
Insulation
PTFE
Spacer disc
PTFE
Electrode tips
Lengths available: 500, 1000, 1500 mm
