Flowserve NRS1-8 Bedienungsanleitung PDF herunterladen (Seite 16)

Apply mains voltage to level switch NRS 1-8.

Commissioning

Check that the NRS 1-8 and the associated level electrode are wired in accordance with the wiring

diagram, Fig. 10, Fig. 11.

Checking wiring

Apply mains voltage

Performance test

1. Check length of electrode rod (see installation manual of the level electrode).

2. When switching on the mains voltage the green LED

4 should be permanently illuminated, Fig. 7.

3. Completely open valves of water-level gauge glass on steam boiler.

4. Fill boiler with feedwater (2 cm above low level).

5. Fill up with feedwater until the max. water level (high level) is exceeded.The two red LEDs of the

level switch

2 must light up after the response delay.

If the automatic self-testing routing is activitated at this point in time an alarm will only be raised

after twice the response delay has elapsed.

6. You can simulate a high level alarm by pressing the button “TEST I” 3, with the electrode tip

submerged. Press and hold down the button until the response delay has elapsed. Both red LEDs

2 must then light up.

7. You can also test the self-checking circuitry of the level switch. With the electrode tip submerged,

operate test switch “TEST II/INSPECTION”

1 in the direction of the arrow. After max. two minutes

the two red LEDs

2 should signal high-level alarm. The button “TEST I” 3 must not be operated

during this test and the level must

not fall below the low level mark.

After the test return switch

1 to its original position. After the response delay the two red LEDs 2

must extinguish.

High-level limiter

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Flowserve NRS1-8 Bedienungsanleitung Seite 16