Flowserve NRGS 11-1 - Manual (Page 10)

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5. Check seating surfaces of threads or flange provided on vessel or boiler
standpipe. Fig. 5
6. Place joint ring onto seating surface of electrode Fig. 3. 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. Molykote ® 111 ) 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.
Explanatory Notes
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Installation
NRGS 11-1, NRGS 16-1, NRGS 16-1 S
NRGS 11-1, NRGS 16 -1
Energizing/deenergizing delay
3 sec., factory set
Indicators and adjustors
4 red LEDs for signalling “electrode submerged”, “output relay energized”
1 four-pole code switch for changing sensitivity
Cable entry
Cable gland with integral cable clamp
2 x PG 9 (M 16)
1 x PG 16 (M20)
Protection
IP 65 to DIN EN 60529
Max. admissible ambient temperature
70 °C
Weight
NRGS 11-1: approx. 1.4 kg
NRGS 16-1: approx. 1.8 kg
NRGS 16-1 S: approx. 2.5 kg
1. Determine required measuring lengths of electrode tips and enter data in table Fig. 3.
2. Cut electrode tips 1 , 2 , 3 and 4 accordingly.
3. Deburr faces of electrode tips.
4. Strip off 50 mm of PTFE insulation from the ends of electrode tips.
Molykote ® 111 is a registered trademark of DOW Corning Corp., Midland Michigan, USA
Technical Data
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C
A
B