Flowserve NRS 1-50 For ONE Electrode Manuel d'utilisateur

1NRS 1-50 For ONE ElectrodeInstallation Instructions 818987-00Level Switch NRS 1-50GESTRA Steam SystemsGESTRA ENEnglish

10Name plate / markingFig. 5Type designationMains voltage/ ProtectionSerial numberManufac-turerWiring diagramSafety noteDisposal noteTechnical Data

111 2 3 4 5 6 7 8 9 10 11 12 13 14 15122716 17 18 19 20 21 22 23 24 25 26 28 29 30Fig. 6Dimensions and Functional ElementsNRS 1-50123451 Upper termin

12Safety noteThis device is an item of equipment with safety function (PED) and must only be installed, wired and commissioned by qualified and compete

13Electrical ConnectionConnection of level electrodeTo connect the level electrode use screened multi-core control cable with a min. conductor size 0

14Electrical Connection - continued -Toolsn Screwdriver for slotted screws, size 3.5 x 100 mm, completely insulated according to VDE 0680-1.Dangern

1527161 2 3 4 5 6 7 817 18 19 20 21 22 23 24925102611 12281329143015NRG 1...-50NRG 16-36LM 0,5A(+)+(-)-NN NL L1212433Electrical Connection - continue

16defFig. 8defFig. 9Electrical Connection - continued -Schematic representations of arrangementsddgeffFig. 10 Fig. 11eed Level electrode NRG 1...-50

17Electrical Connection - continued -Explanatory notes to schematic respresentationsSteam boiler plants and (pressurized) hot-water installations ac

18Commissioning ProcedureDangerThe terminal strips of the equipment are live during operation.This presents the danger of electric shock!Always cut of

19Commissioning - continued - Checking switchpoint and functionStartActivity Indication FunctionApply mains voltage. All LEDs are illuminated.System

2ContentsUsage for the intended purpose ...

20OperationActivity Indication FunctionLevel electrode submerged.Green LED for level electrode 1 is illuminatedOutput contacts are closed. Signal ou

21Troubleshooting - continued -Diagnosis Display 1 and activity Display 2 Fault Remedy LED alarm 1 and diagnosis LED 1 illuminated. Press and hold d

22Measure the electrode voltage in order to check whether the level electrode is immersed or if there is a malfunction. Please observe Fig. 15. ≈ 0.7

23Action against high frequency interferenceShould sporadic failures occur in installations susceptible to faults (e. g. malfunctions due to out-of-ph

24818987-00/12-2009cm (808835-00) · GESTRA AG · Bremen · Printed in GermanyAgencies all over the world:www.gestra.deGESTRA AGP. O. Box 10 54 60, D-28

3Contents - continued -Checking switchpoint and function ...

4ApplicationUsage for the intended purposeThe level switch NRS 1-50 is used in conjunction with level electrode NRG 1...-.. to limit the water level i

5Directives and StandardsPressure Equipment Directive (PED) 97/23/ECWater level limiters are safety accessories as defined in the Pressure Equipment Di

6Functional Safety acc. to IEC 61508Safety characteristics of the subsystem NRG 1...-50 / NRS 1-50The level switch NRS 1-50 is certified acc. to IEC 61

7Functional safety acc. to IEC 61508 - continued -Determination of the Safety Integrity Level (SIL) for safety-related systemsLevel electrode, level

8NRS 1-50Supply:Mains voltage 24 VDC +/– 20 %, 0.3 A or 100 – 240 VAC +10/–15 %, 47 – 63 Hz, 0.2 AExternal fuse 0.5 A (semi-delay)Power consumption 7

9NRS 1-50 - continued -Further conditions: Ambient temperature when system is switched on: 0 ° ... 55 °C during operation: -10 ... 55 °CTransport te