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Contents

Page

continued

Changing factory settings

Changing the function and input of the level electrode/transmitter.........................................................14

Operating the level controller

Meaning of codes on the 7-segment display .........................................................................................16

Setting the measuring range .................................................................................................................17

Additional information on control parameters ........................................................................................17

Commissioning

Setting parameters................................................................................................................................18

Setting the measuring range .................................................................................................................19

Operation, alarm and testing

Setting switchpoints and control parameters .........................................................................................20

Level controller NRR 2-50 Displays ....................................................................................................21

Level controller NRR 2-51 Displays ....................................................................................................21

Check function of MIN/MAX output contacts ........................................................................................22

Fault indications and troubleshooting

Display, diagnosis and troubleshooting ..................................................................................................23

Further information

Action against high-frequency interference ...........................................................................................24

Replacing/taking the equipment out of service ......................................................................................24

Disposal ................................................................................................................................................24

Содержание NRR 2-50

Страница 1: ...1 E N English Level Controller NRR 2 50 NRR 2 51 Original Installation Instructions 819180 03 ...

Страница 2: ...l controller Dimensions of the NRR 2 50 NRR 2 51 8 Key 8 Installation in control cabinet 8 Name plate identification 9 In the control cabinet Electrically connecting the level controller Wiring diagram for level controller NRR 2 50 10 Key 10 Wiring diagram for level controller NRR 2 51 11 Key 11 Supply voltage connection 12 Connection of output contacts 12 Connecting the level electrode level tran...

Страница 3: ...s 17 Commissioning Setting parameters 18 Setting the measuring range 19 Operation alarm and testing Setting switchpoints and control parameters 20 Level controller NRR 2 50 Displays 21 Level controller NRR 2 51 Displays 21 Check function of MIN MAX output contacts 22 Fault indications and troubleshooting Display diagnosis and troubleshooting 23 Further information Action against high frequency int...

Страница 4: ...is opening or closing The controller can be configured for fill or discharge control A further output contact indicates when a MIN or MAX water level is reached the desired function can be selected by a switch After the de energizing time has elapsed the output contact switches over and the MIN or MAX LED lights up Level controller NRR 2 51 The level controller works with an electro pneumatically ...

Страница 5: ...ectrode and the NRGT 26 1 level transmitter is type approved to the VdTÜV Bulletin Water Level 100 The VdTÜV Wasserstand Water Level 100 describes the requirements for water level control and limiting equipment for boilers ATEX Atmosphère Explosible The equipment must not be used in potentially explosive atmospheres in accordance with European Directive 2014 34 EU LV Low Voltage Directive and EMC ...

Страница 6: ...ession RC combination as per the manufacturer s specification NRR 2 50 1 analogue output 4 20 mA max load 500 ohms e g for an actual value display optional Displays and controls 1 rotary knob with integrated push button for MIN MAX alarm test and parameter setting 1 4 digit 7 segment LED display green 2 red LEDs for MIN MAX alarm 2 amber LEDs for control valve opening closing NRR2 50 only 1 4 pole...

Страница 7: ...ing period of 24 hours Relative humidity max 95 no moisture condensation Approvals TÜV Certificate VdTÜV Bulletin Wasserstand 100 Water Level 100 Requirements for water level control and limiting equipment Type approval no TÜV WR XX 425 see name plate Technical data Contents of package NRR 2 50 1 level controller NRR 2 50 1 installation operating manual NRR 2 51 1 level controller NRR 2 51 1 insta...

Страница 8: ... 50 NRR 2 51 1 Upper terminal strip 2 Lower terminal strip Key Installation in control cabinet The NRR 2 50 NRR 2 51 level controller is clipped onto a type TH 35 EN 60715 support rail in the control cabinet Fig 1 4 3 Housing 4 Support rail TH 35 EN 60715 Fig 1 4 3 1 2 46 74 120 15 ...

Страница 9: ...xx 425 Name plate identification Name plate bottom Type designation Supply volt age Fuse provided on site Power consumption Disposal information Approvals Fig 2 Degree of protection Safety information Output contacts Ambient temperature In the control cabinet Installing the level controller Connection of level electrode level transmitter Manipulated variable Y Name plate NRR 2 50 top Name plate NR...

Страница 10: ... Max 3 NRS NRR 2 5 devices can be connected connection in parallel 7 Level transmitter NRGT 26 1 4 20 mA with earthing point Max 3 NRS NRR 2 5 devices can be connected series connection 8 Central earthing point CEP in control cabinet 9 Output contact for control valve actuation 0 MIN MAX output contact de energizing delay 3 seconds a Actual value output 4 20 mA optional Key 5 7 8 0 9 6 NRR 2 50 Fi...

Страница 11: ...ces can be connected connection in parallel 7 Level transmitter NRGT 26 1 4 20 mA with earthing point Max 3 NRS NRR 2 5 devices can be connected series connection 8 Central earthing point CEP in control cabinet 9 MIN output contact de energizing delay 3 seconds 0 MAX output contact de energizing delay 3 seconds a Output 4 20 mA manipulated variable Y Key 5 7 6 NRR 2 51 Fig 4 0 5 A semi delay a MIN...

Страница 12: ...se for the output contacts When inductive loads are switched off voltage spikes are produced that may have a major adverse effect on the operation of control and measuring systems Connected inductive loads must therefore have interference suppression RC combination as per the manufacturer s specifications Tools n Screwdriver size 3 5 x 100 mm fully insulated to VDE 0680 1 Important n Do not use un...

Страница 13: ...connected to its own dedicated power supply Factory settings Level controller NRR 2 50 n De energizing delay 3 sec factory set n Voltage input for the connection of an NRG 21 or NRG 26 21 level electrode n MAX switchpoint AL Hi 80 n MIN switchpoint AL Lo 20 n Setpoint SP 50 n Proportional band Pb 20 of setpoint n Integral action time ti 0 n Dead band 5 of setpoint n Valve travel time tt 40 s n Cal...

Страница 14: ...g of code switch c To make changes you can access the code switch as follows s Switch off the supply voltage n Remove the lower terminal strip Fig 5 n Insert a screwdriver between the terminal strip and the front frame to the right and left of the ar row markings n Release the terminal strip on the right and left sides by turning the screwdriver in the direction of the arrow n Remove the terminal ...

Страница 15: ...MIN alarm ON Level controller NRR 2 50 NRR 2 51 Input for connection of level electrode NRG 21 or NRG 26 21 OFF Input for connection of level transmitter NRGT 26 1 ON Fill control OFF Discharge control ON grey factory setting Important When connecting the NRGT 26 1 level transmitter please set the upper and lower ends of the measuring range only in the transmitter Here please pay attention to the ...

Страница 16: ... electrode NRG 21 or NRG 26 21 is connected Sets lower end of measuring range CAL P Calibrate adjustable between 25 and 100 CAL H Calibrate High Sets upper end of measuring range Indicated in parameterization mode quit Confirm Input is not confirmed done Done Input is confirmed Indicated if malfunctions occur E 005 Error Faulty level electrode transmitter measuring voltage current too low E 006 Er...

Страница 17: ...mm If the measuring range is 100 200 mm and the setpoint is 80 160 mm the proportional range will be 16 32 mm or in the range of 128 to 192 mm Integral action time ti Larger Slow correction of deviations Responds slowly Smaller Fast correction of deviations control loop may tend to overshoot Responds quickly Additional information on control parameters A Lower end of measuring range adjustable B U...

Страница 18: ...nged using the rotary knob Turning clockwise increases the value turning anti clockwise reduces the value When your entries are complete press and hold the push button within 3 sec done is displayed Next the display toggles between the parameter and the new value Input is confirmed System switches back to the parameter If you do not confirm your entry within 3 sec or you do not make any further en...

Страница 19: ...on the display After a short time 0100 appears Input is confirmed actual value output 20 mA Level electrode NRG 2 only Setting the measuring range option 2 Action Display Function Reduce water level until start of measuring range A Select parameter CAL L After a short time a hexadecimal number flashes Calibrate start of measuring range Press push button The current hexadecimal number flashes Press...

Страница 20: ...entage MIN switchpoint setting between 0 100 Select parameter AL Hi enter and save the desired percentage MAX switchpoint setting between 0 100 Setting the setpoint Select parameter SP enter and save the desired percentage Setpoint setting between 0 100 Please take the settings for MIN MAX switchpoints into consideration Setting the proportional band Select parameter Pb enter and save the desired ...

Страница 21: ...on Actual value setpoint Valve and MIN MAX LEDs do not light up Valve output contact 16 17 19 open MIN output contacts 16 18 open 17 18 closed MAX output contacts 21 23 open 22 23 closed Value above or below setpoint Value above or below setpoint Valve OPEN LED flashes amber Control valve opens valve output contact 16 19 closed or Valve OPEN CLOSED flashes amber Control valve opens valve output co...

Страница 22: ...utput contact 16 18 open 17 18 open MAX output contact 21 23 open 22 23 closed MIN LED flashes red De energizing delay in progress MIN LED lights up red for 3 seconds MIN output contact 16 18 closed 17 18 open Test complete release push button Device switches to operating mode Note If you continue holding the push button the test sequence will start again You can interrupt the test sequence at any...

Страница 23: ... indicated by the 7 segment display Fault code Fault Remedy E 005 Faulty level electrode measuring voltage 0 5 VDC Check level electrode and replace if necessary Check electrical connection Faulty level transmitter measuring current 4 mA Check level transmitter and replace if necessary Check electrical connection E 006 Faulty level electrode measuring voltage 7 VDC Check level electrode and replac...

Страница 24: ...Suppress HF interference using hinged shell ferrite rings Replacing taking the equipment out of service Disposal The equipment must be disposed of in accordance with statutory waste disposal provisions In the event of faults that cannot be remedied with the aid of this manual please contact our Technical Customer Service n Switch off the power supply and cut off power to the equipment n Remove the...

Страница 25: ...25 For your notes ...

Страница 26: ...26 For your notes ...

Страница 27: ...27 For your notes ...

Страница 28: ...863 03 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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