GESTRA NRS 1-54 Original Installation Instructions Download Page 1 | Manualshive

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Level Switch

NRS 1-54

NRS 1-55

Original Installation Instructions

819178-01

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Summary of Contents for NRS 1-54

Page 1: ...1 E N English Level Switch NRS 1 54 NRS 1 55 Original Installation Instructions 819178 01 ...

Page 2: ...allation in control cabinet 9 Name plate marking 10 In control cabinet Mounting level switch Wiring diagram for level switch NRS 1 54 NRS 1 55 11 Key 11 Connecting supply voltage 12 Connecting output contacts 12 Connecting level electrode 12 Tools 12 In control cabinet Wiring level switch Level switch NRS 1 54 Connecting several level electrodes fill control 13 Key 13 Level switch NRS 1 55 Connect...

Page 3: ...ction 18 19 Level switch NRS 1 55 Checking switchpoint and function 20 21 Commissioning procedure Level switch NRS 1 54 Indications and operation 22 Level switch NRS 1 55 Indications and operation 23 Operation alarm and test Basic settings Factory setting 15 Protection against high frequency interference 24 Decommissioning replacing the equipment 24 Disposal 24 Further notes ...

Page 4: ...ical conduc tivities and for connecting three level electrode rods The level switch works as on off water level controller for fill or discharge control and indicates in addition when the preset MAX or MIN water level MAX NRS 1 54 MIN NRS 1 55 is reached The length of the associated electrode rods determines the switchpoints for water level control and MIN or MAX water level The equipment monitors...

Page 5: ... a recognised level of competence Danger The terminal strips of the equipment are live during operation This presents the danger of electric shock Always cut off power supply to the equipment before mounting removing or connect ing the terminal strips Attention The name plate specifies the technical features of the equipment Note that any piece of equipment without its specific name plate must nei...

Page 6: ...uipment as specified in EN 60079 11 section 5 7 According to the European Directive 2014 34 EU the equipment must be equipped with approved Zener barriers if used in potentially explosive areas Applicable in Ex zones 1 2 1999 92 EC The equipment does not bear an Ex marking LV Low Voltage Directive and EMC Electromagnetic Compatibility The equipment meets the requirements of the Low Voltage Directi...

Page 7: ...and adjustors 1 Test button for MIN MAX alarm 1 red green LED for indicating operating mode and MIN MAX alarm 1 red green LED for indicating operating mode and Pump ON 1 green LED for Power ON 1 code switch with 4 poles for changing the sensitivity and function 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 str...

Page 8: ...frosting time of the de energized equipment before it can be put into operation 24 hours Relative humidity max 95 no moisture condensation Approvals TÜV certificate VdTÜV Bulletin Water Lever 100 Water Level 100 Requirements made on water level limiting control equipment Type approval no TÜV WR WB XX 424 see name plate Technical Data continued Scope of supply NRS 1 54 1 Level switch NRS 1 54 1 Ins...

Page 9: ...1 1 Upper terminal strip 2 Lower terminal strip Key Installation in control cabinet The level switch NRS 1 54 NRS 1 55 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 ...

Page 10: ...e marking Name plate on top Name plate at the bottom Material number Supply voltage Fuse provided on site Power consumption Disposal note Approvals Fig 2 Connection of level electrodes Type designation Protection Manufacturer Ambient temperature External fuse for output contacts Output contacts Serial number Safety note ...

Page 11: ...d on site 6 Reference electrode or vessel used as functional earth 7 MIN electrode rod 8 MAX electrode rod 9 Electrode rods for water level controller 0 Central earthing point CEP in control cabinet a MAX output contact b MIN output contact c Output contact for water level controller Key 8 a c M 0 5 A semi delay 6 Fig 3 NRS 1 54 NRS 1 55 M 0 5 A semi delay 5 6 c b 0 9 9 ...

Page 12: ...ire 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 completely insulated according to VDE 0680 1 Connecting output contacts W...

Page 13: ...electrode NRG 16 36 f Level electrode ER 5 4 pole connector Key g Level electrode ER 5 6 pole connector h Level electrode NRG 16 4 i Central earthing point CEP in control cabinet d h MAX Pump OFF Pump ON f 1 2 3 4 5 6 7 8 NRG16 4 NRG16 4 NRG16 4 3 3 3 Fig 8 MAX Pump OFF Pump ON MAX MAX Pump OFF Pump ON Pump OFF MAX Pump OFF Pump ON Pump ON i i i i i NRG 1 52 NRS 1 54 NRS 1 54 NRS 1 54 NRS 1 54 NRS...

Page 14: ...6 4 NRG16 4 3 3 3 Fig 13 Pump ON Pump OFF MIN Pump ON Pump OFF MIN Pump ON Pump OFF MIN Pump ON Pump OFF MIN d Level electrode NRG 10 52 NRG 16 52 Five pole connector e Level electrode NRG 16 36 f Level electrode ER 5 4 pole connector g Level electrode ER 5 6 pole connector h Level electrode NRG 16 4 i Central earthing point CEP in control cabinet i NRG 1 52 i i i i NRS 1 55 NRS 1 55 NRS 1 55 NRS ...

Page 15: ...ccordance with the examples Fig 4 to 13 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 that connecting cables leading to the level electrodes are segregated and run separately from power cables Fact...

Page 16: ...upply voltage n Remove lower terminal strip Fig 14 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 Commissioning procedure Fig 14 After the new code switch settings have been established as new defaults n Re attach lo...

Page 17: ...F ON ON grey factory setting Fig 15 Toggle switch white The NRS 1 54 is configured at our works as fill controller and the NRS 1 55 as discharge controller To change the function set the switches S1 to S3 of code switch j to the positions indicated in table Fig 15 Commissioning continued Changing function 1 3 ON 2 4 1 3 ON 2 4 1 3 ON 2 4 1 3 ON 2 4 Toggle switch white ...

Page 18: ...pen Checking switchpoint and function discharge control Fill vessel until water level Pump ON is exceeded Electrode rod Pump ON is submerged Pump LED illuminated green Pump output contact 17 18 closed 16 18 open Lower water level until it is below Pump OFF level Electrode rod Pump OFF is exposed Pump LED is not illuminated Pump output contact 16 18 closed 17 18 open Commissioning continued Level s...

Page 19: ...tchpoints The earth connection to the vessel is interrupted Clean seating surfaces and screw in level elec trode with metallic joint ring Do not insulate the electrode with hemp or PTFE tape Electrical conductivity of the boiler water too low Change response sensitivity to 0 5 μS cm Upper vent hole flooded Check installation of level electrode Make sure that the level in the protection tube corres...

Page 20: ...pen Checking switchpoint and function discharge control Fill vessel until water level Pump ON is exceeded Electrode rod Pump ON is submerged Pump LED illuminated green Pump output contact 22 23 closed 21 23 open Lower water level until it is below Pump OFF level Electrode rod Pump OFF is exposed Pump LED is not illuminated Pump output contact 21 23 closed 22 23 open Commissioning continued Level s...

Page 21: ...tchpoints The earth connection to the vessel is interrupted Clean seating surfaces and screw in level elec trode with metallic joint ring Do not insulate the electrode with hemp or PTFE tape Electrical conductivity of the boiler water too low Change response sensitivity to 0 5 μS cm Upper vent hole flooded Check installation of level electrode Make sure that the level in the protection tube corres...

Page 22: ...gizing delay is running MAX LED is illuminated red for 3 sec MAX output contact 21 23 closed 22 23 open The test is finished Release button Test Equipment returns to operating mode Note If you continue to hold down the Test button a new test is started You can abort the test any moment by releasing the Test button Discharge control Switchpoint Water level pump ON exceeded Pump LED illuminated gree...

Page 23: ...N output contact 16 18 closed 17 18 open The test is finished Release button Test Equipment returns to operating mode Note If you continue to hold down the Test button a new test is started You can abort the test any moment by releasing the Test button Discharge control Switchpoint Water level pump ON exceeded Pump LED illuminated green Pump output contact 22 23 closed 21 23 open Level below switc...

Page 24: ...F 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 14 n Release the white fixing slide at the bottom of the equipment and take the eq...

Page 25: ...25 For your Notes ...

Page 26: ...26 For your Notes ...

Page 27: ...27 For your Notes ...

Page 28: ...8849 01 GESTRA AG Bremen Printed in Germany 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 de Agencies all over the world www gestra de ...

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