Flowserve NRS 1-7 Manuel d'utilisateur Page 1

1NRS 1-7Installation Instructions 818546-00Level Switch NRS 1-7GESTRA Steam SystemsGESTRA

10Functional ElementsNRS 1-7Fig. 74123

11ACover screwsBBaseCCoverDMounting clipECable entry (flexible)FCable entry (housing)GHole d = 4.3 mm1Button “TEST 2 / INSPECTION” for internal self-c

12Tools Screwdriver (5.5/100)Attention To provide sufficient ventilation, ensure a minimum spacing of 20 mm betweenadjacent units.InstallationNRS 1

13DBEHFFCAInstallation – continued –Fig. 9Fig. 8Examples of InstallationGG

14WiringNRS 1-7Cable required for wiring to the electrode: four-core screened cable, e. g. I-Y(St)Y 2 x 2 x 0.8 orLIYCY 4 x 0.5².Max. cable length 100

15Wiring – continued –Wiring diagramFig. 10Fig. 11This wiring diagram is only applicable for France!

16Apply mains voltage to level switch NRS 1-7.CommissioningCheck that the NRS 1-7 and the associated level electrode are wired in accordance with the

17Operational MalfunctionsFault-finding list for troubleshootingElectrode submerged – low-level alarmFault: The level switch indicates a low-level ala

18DisposalDecommissioningRemove the level switch and separate the waste materials in accordance with the materialspecification.Electronic components (

19Declaration of conformity AnnexWe hereby declare that the equipment NRS 1-7 conforms to the following European guidelines: LV guideline 73/23/eec

2ContentsUsage for the intended purpose ...

20Great BritainFlowserve Flow Control (UK) Ltd.Burrel Road, Haywards HeathWest Sussex RH 16 1TLTel. 00 44 14 44 / 31 44 00Fax 00 44 14 44 / 31 45 57E-

3Check wiring...

4Important NotesDangerThe terminal strip of the NRS 1-7 is live during operation. This presents the danger ofelectric shock!Cut off power supply befor

5Explanatory Notes – continued –FunctionThe level switch NRS 1-7 is a two-channel unit provided with an automatic self-checking circuitryin accordanc

6NRS 1-7Technical DataType approval no.TÜV · WB · 01-354EG 01202931-B-01-0077EG 01202931-B-01-0075InputFour terminals for the connection of one level

7Corrosion resistanceIf the equipment is used for its intended purpose, its safety is not impaired by corrosion.Technical Data – continued –Name plat

8Technical Data – continued –DimensionsFig. 210673251Fig. 311285

9DesignFig. 6GBCFEDFig. 4 Fig. 5AANRS 1-7