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Level Switch

NRS 1-52

Original Installation Instructions

819176-02

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Содержание NRS 1-52

Страница 1: ...E N English Level Switch NRS 1 52 Original Installation Instructions 819176 02 ...

Страница 2: ...stallation in control cabinet 8 Example name plate marking 9 In control cabinet Wiring level switch Wiring diagram for level switch NRS 1 52 10 Key 10 Connecting supply voltage 11 Connecting MIN MAX output contact 11 Connecting level electrode 11 Tools 11 In the plant Wiring level electrode Connecting several level electrodes 12 Key 12 Connection of level electrode 13 Factory settings Commissionin...

Страница 3: ...2 Contents continued Page Operation Alarm and Test Indicators and adjustors 17 Further Notes Action against high frequency interference 18 Decommissioning replacing the equipment 18 Disposal 18 Declaration of Conformity Directives and Standards 19 ...

Страница 4: ...es The length of the associated electrode rod determines the MIN and MAX water level switchpoints The level switch detects that the MIN or MAX water level is reached when the corresponding electrode rod is exposed or submerged After the de energizing delay has elapsed the MIN or MAX output con tact is switched over At the same time the MIN or MAX LED changes from green to red A MIN or MAX alarm ca...

Страница 5: ...plosive areas Note The level electrodes NRG 10 52 NRG 16 52 NRG 16 36 NRG 16 4 and ER 5 1 are simple items of electrical equipment as specified in EN 60079 11 section 5 7 The equipment must be equipped with approved Zener barriers if used in potentially explo sive areas Applicable in Ex zones 1 2 1999 92 EC The equipment does not bear an Ex marking ...

Страница 6: ...nterference suppression Indicators and adjustors 1 pushbutton Test for simulating MIN MAX alarm 2 red green LEDs for indicating operating mode and MIN MAX alarm 1 green LED indicating Power ON 1 code switch with 4 poles for changing the sensivity Housing Housing material base polycarbonate black front polycarbonate grey Conductor size 1 x 4 0 mm solid per wire or 1 x 2 5 mm2 per stranded wire with...

Страница 7: ... 80 C 100 hours defrosting time of the de energized equipment before it can be put into operation 24 hours Storage temperature 20 70 C defrosting time of the de energized equipment before it can be put into operation 24 hours Relative humidity max 95 no moisture condensation Technical Data continued Scope of supply NRS 1 52 1 Level switch NRS 1 52 1 Installation manual ...

Страница 8: ...tch Dimensions NRS 1 5 Fig 1 1 Upper terminal strip 2 Lower terminal strip Key Installation in control cabinet The level switch NRS 1 52 is clipped onto the support rail 4 type TH 35 EN 60715 in the control cabinet Fig 1 3 Housing 4 Supporting rail type TH 35 EN 60715 2 74 1 4 3 46 120 ...

Страница 9: ...Wiring diagram terminals 16 23 3 Function 4 Type designation 5 Protection 6 Protection class 7 Operating data max ambient temperature 8 Relay protection 9 Safety note 0 Manufacturer a Material number serial number b Conformity mark c Disposal note d Type approval e Supply voltage f Power consumption g External fuse for voltage supply h Wiring diagram terminals 1 8 i Terminals 1 8 1 1 7ÞXMROXO OWOX...

Страница 10: ...ion of supply voltage 24 V DC with fuse 0 5 A semi delay provided on site 6 Reference electrode or vessel used as functional earth 7 MIN electrode rod 8 MAX electrode rod 9 Central earthing point CEP in control cabinet 0 MAX output contact a MIN output contact Key 16 17 18 19 20 21 22 23 1 2 3 4 5 6 7 8 MIN MAX 8 a 0 M 0 5 A semi delay 6 Fig 3 ...

Страница 11: ...3 x 0 5 mm2 max length 100 m Wire terminal strip in accordance with the wiring diagram Fig 3 Connect the screen only once to the central earthing point CEP in the control cabinet Make sure that connecting cables leading to the level electrodes are segregated and run separately from power cables Tools n For all functions Screwdriver 0 8 x 4 0 or 0 8 x 4 5 Connecting MIN MAX output contact Wire the ...

Страница 12: ...ectrode Connecting several level electrodes b Level electrode NRG 10 52 NRG 16 52 five pole connector c Level electrode NRG 16 36 d Level electrode ER 5 4 pole connector Key e Level electrode ER 5 6 pole connector f Level electrode NRG 16 4 g Central earthing point CEP in control cabinet b d 1 2 3 4 5 6 7 8 NRG16 4 NRG16 4 3 3 f MAX MIN MAX MAX MAX MIN MAX MIN g g g g g NRG 1 52 NRS 1 52 NRS 1 52 ...

Страница 13: ...ontrol cable with a min conductor size 0 5 mm2 e g LiYCY 3 x 0 5 mm2 max length 100 m Wire terminal strip in accordance with the examples Fig 4 to 8 Check the connection of the screen to the central earthing point CEP in the control cabinet Attention n Please observe the instructions given in the installation operating manual for the NRG 10 52 NRG 16 52 NRG 16 36 NRG 16 4 and ER 5 1 n Make sure th...

Страница 14: ...µS cm as follows n Cut off supply voltage n Remove lower terminal strip Fig 9 n Insert a screwdriver to the right and left between the terminal strip and the front frame n Unlock terminal strip on the left and right side For this purpose move screwdriver in direction of the arrow n Remove the terminal strip n Set switch S4 of code switch h to ON response sensitivity 0 5 µS cm n Re attach lower ter...

Страница 15: ...Error Remedy Water level below MIN switchpoint MIN LED illuminated green MIN electrode rod is too long Cut electrode rod according to MIN switchpoint If installed inside the boiler Upper vent hole in protec tion tube does not exist or is obstructed Check installation of level electrode Make sure that the level in the protection tube corresponds to the actual water level Water level between MIN and...

Страница 16: ... Upper vent hole in protec tion tube does not exist or is obstructed Check installation of level electrode Make sure that the level in the protection tube corresponds to the actual water level Water level between MIN and MAX MAX LED illuminated red MAX electrode rod is too long Cut electrode rod according to MAX switch point Upper vent hole flooded Check installation of level electrode Make sure t...

Страница 17: ...osed 22 23 open Operation Alarm and Test Indicators and adjustors Testing MIN alarm and MAX alarm During operation Water level between MIN and MAX Press and hold down button Test MAX LED flashes red De energizing delay is running MAX LED is illuminated red for 3 sec MAX output contact 21 23 closed 22 23 open MIN and MAX LEDs illuminated green for 1 sec MAX output contact 21 23 open 22 23 closed MI...

Страница 18: ...the control cabinet n HF interference suppression by means of hinged shell ferrite rings n Make sure that connecting cables leading to the level electrodes are segregated and run separately from power cables Further Notes n Switch off supply voltage and cut off power supply to the equipment n Remove the lower and upper terminal strips Fig 9 n Release the white fixing slide at the bottom of the equ...

Страница 19: ...laration of Conformity can be found online at www gestra com and associated certificates can be requested from GESTRA AG Münchener Straße 77 28215 Bremen Germany Telefon 49 421 3503 0 Telefax 49 421 3503 393 E mail info de gestra com Web www gestra com Note that Declarations of Conformity and associated certificates lose their validity if equipment is modified without prior consultation with us De...

Страница 20: ...Straße 77 28215 Bremen Germany Telefon 49 421 3503 0 Telefax 49 421 3503 393 E mail info de gestra com Web www gestra com Agencies all over the world www gestra com UK Importer GESTRA UK Ltd Unit 1 Sopwith Park Royce Close West Portway Business Park Andover Hampshire SP10 3TS United Kingdom ...

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