12
NRGS 15-1 - USA - Installation & Operating Manual -
850690-00
Technical data
Service pressure
363 psi at 435 °F (25 bar at 224 °C)
Mechanical connection
Thread 1" - 11.5 NPT
Materials
Screw-in body:
1.4404 / F316L
Electrode rods:
1.4571, CrNiMoTi17-12-2
Electrode rod insulation: PTFE
Spacer:
PTFE
Terminal box:
Polycarbonate
Electrode rods
Length supplied:
39.37 in (1000 mm)
Diameter:
0.2 in (5 mm)
Supply voltage
NRGS 15-1 / 240 VAC: 240 V +10/–15 %, 50/60 Hz
NRGS 15-1 / 120 VAC: 120 V +10/–15 %, 50/60 Hz
Power consumption
3 VA
Fuse
External 63 mA, slow blow, at 240 V
External 125 mA, slow blow, at 120 V
Response sensitivity
[electrical conductivity of water at 77 °F (25 °C)]
> 5 ... < 5000 ppm (> 10 ... < 10000 µS/cm) (switch-selectable)
Electrode voltage
20 V
ss
Output
4 volt-free relay contacts,
8 A 250 V AC / 30 V DC cos
ϕ
= 1 (IEC 61810)
Ensure interference suppression (RC combination) for contactor.
Energizing/de-energizing delay
Relays 1 and 2:
1s, fixed
Relay 3:
0-30s, set via potentiometer
Relay 4:
3s, fixed
Indicators and controls
3 red LEDs to indicate “Low level alarm 1 + 2 / High level”.
1 yellow LED to indicate “Pump on”.
1 green LED to indicate “Mains supply on”.
1 10-pole code switch to select the sensitivity and define the functions.
1 potentiometer for setting the time delay (0 to 30 s)
