Flowserve NRGS 11-1 User Manual download pdf (Page 10)

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 x39 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 – continued –

Installation

NRGS 11-1, NRGS 16-1, NRGS 16-1S

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 – continued –

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 19 20

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Flowserve NRGS 11-1 User Manual Page 10