Flowserve NRGS 16-2 - Manual (Page 10)

10
1. Determine required measuring lengths of electrode rods and enter data in table 1
Fig. 2.
2. Cut electrode rods 1 , 2 , 3 and 4 accordingly.
The electrode rods 1 and 2 (low level limiter) must have the same length.
3. Deburr faces of electrode tips.
4. Strip off 50 mm of PTFE insulation from the ends of electrode tips.
5. Check seating surfaces of threads or flange provided on vessel or boiler standpipe.
Fig. 3
6. Place joint ring onto seating surface of electrode Fig. 2. Use only joint ring
(of stainless steel 1.4301) D 33 x 39 to DIN 7603 supplied with electrode.
7. Apply a light smear of silicone grease (e. g. DOW Corning 111 Compound)
to electrode thread .
8. Screw level electrode into threads or flange provided on vessel or boiler standpipe
and tighten with a 41 mm open-end spanner. The torque required is 140 Nm when
cold.
Technical Data -
continued
Installation
NRGS 16-2
Indicators and adjustors
2 red LEDs for signalling “Low water”,
1 green LED for signalling “Pump ON”,
1 four-pole DIP switch for changing sensitivity,
1 button “TEST” for functional checking of low level alarm
Cable entry
Cable gland with integral cable clamp
1 x PG
1 9
1 x PG 16
Protection
IP 65 to DIN 40050
Max. admissible ambient temperature
70 °C (158 °F)
Weight
approx. 1.8 kg
C C C C C B B B B B
A A A A A