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GESTRA NRG 26-60 Original Installation & Operating Manual

Level electrode
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Level Electrode
NRG 26-60
Original Installation &
Operating Manual
819875-00

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Summary of Contents for GESTRA NRG 26-60

  • Page 1 Level Electrode NRG 26-60 Original Installation & Operating Manual 819875-00 E n g l i s h...

  • Page 2: Table Of Contents

    Bus line, cable length and cross-section ....................32 Example ..............................32 Important notes on connecting the CAN bus system ................. 33 Pin assignment of the CAN bus connector and coupling for non pre-wired control cables ............................33 NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 3 Checking installation and function ......................48 Taking out of service ............................ 49 Cleaning the level electrode ......................... 50 Cleaning interval ............................50 Disposal ................................ 50 Returning decontaminated devices ......................50 EU Declaration of Conformity ........................51 NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 4: Content Of This Manual

    BAN 819875-00/08-2019cm © Copyright All rights reserved. Any misuse, particularly reproduction and dissemination to third parties, is not permit- ted. The General Terms & Conditions of GESTRA AG apply. Scope of delivery/Product package 1 x NRG 26-60 level electrode ■ ■...

  • Page 5: How To Use This Manual

    How to use this Manual This Installation & Operating Manual describes the correct use of the NRG 26-60 level electrode. It applies to persons who integrate this equipment in control systems, install, bring into service, operate, maintain and dispose of this equipment. Anyone carrying out the above-mentioned activities must have read this Installation &...

  • Page 6: Types Of Warning

    Warning of a dangerous situation that may possibly result in death or serious injury. CAUTION Warning of a situation that may result in minor or moderate injury. ATTENTION Warning of a situation that results in damage to property or the environment. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 7: Specialist Terms/Abbreviations

    Data transmission standard and interface for connecting electronic equipment, sensors and control systems. Data can be sent and received. NRG .. / URS .. / URB .. / SRL .. / etc. Equipment and type designations of GESTRA AG, see page 9. SELV Safety Extra Low Voltage...

  • Page 8: Usage For The Intended Purpose

    Use as a water level controller The level electrode NRG 26-60 can be used together with a NRR 2-60 / NRR 2-61 level controller to con- tinuously measure the water level in steam and water boilers, or in condensate and feedwater tanks.

  • Page 9: Admissible System Components

    Do not use the equipment in potentially explosive atmospheres. Do not bring any equipment into service that does not have its own specific name plate. The name plate indicates the technical features of the equipment. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 10: Basic Safety Notes

    Check that the system is not carrying live voltage before commencing work. ■ ■ Danger to life from faulty NRG 26-60 level electrode due to the sudden escape of hot steam or hot water. Impacts during transport or installation can lead to damage or leaks on the NRG 26-60 level electrode, causing pressurised hot steam or hot water to escape through the pressure relief hole.

  • Page 11: Required Personnel Qualifications

    Persons trained by the plant operator to work Conversions Specialist staff with pressure and temperature. Fig. 2 Notes on product liability We the manufacturer cannot accept any liability for damages resulting from improper use of the equip- ment. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 12: Function

    ■ Controller functions The NRG 26-60 level electrode can be used together with a NRR 2-60 / NRR 2-61 level controller as a water level controller. The controller is parametrised exclusively using the URB 60 visual display and operating unit.
  • Page 13 Display and signals, see page 41 / 43 * The NRG 26-60 level electrode has a 4-digit green 7-segment display for showing measured values and status information, along with the fault codes. A red and green LED indicate the operating status.
  • Page 14 You can adjust the electrode’s parameters to the on-site system conditions if necessary. You can adjust the parameters or change the factory settings using a rotary knob on the terminal box, see page 34 ff. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 15: Technical Data

    0.1 % ■ ■ Internal processing resolution: 15 bit with sign (16 bit) ■ ■ Supply voltage 24 V DC +/-20 % ■ ■ Power consumption max. 7 VA ■ ■ NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 16 Approx. 2.1 kg ■ ■ Admissible installation positions Vertical ■ ■ Oblique to a maximum inclination of 45°. The length of the electrode rod is limited to 688 mm maximum. ■ ■ NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 17: Name Plate/Identification

    Manufacturer GESTRA AG Protection class Münchener Str. 77 28215 Bremen Disposal information GERMANY Serial number Fig. 3 The date of production is stamped on the screw-in body of every level electrode. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 18: Factory Settings

    Factory settings The NRG 26-60 level electrode is delivered ex-works with the following settings: Parameter values Display in Parameter Unit menu NRG 26-60 Controller group 0001 - - - Baud rate bd.rt 0050 KBit/s Raw value (hex) CAL.L Lower bound calibration variable approx.

  • Page 19: Overall View Of The Nrg 26-60

    M12 CAN bus connector, 5-pole, A-coded Sheath (simplified representation) Seal seat for sealing ring Sealing ring D 27 x 32, form D, DIN 7603-2.4068, bright annealed Electrode thread Electrode PTFE electrode rod insulation Fig. 5 NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 20: Dimensions Of The Nrg 26-60

    238 °C Ø 15 1004 1110 1000 1214 1100 1319 1200 1423 1300 1528 1400 Fig. 6 All lengths and diameters 1636 1500 in mm 2156 2000 NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 21: Preparing For Installation

    Take further measures to protect the equipment from lightning, insects and animals, and ■ ■ salty air. You will need the following tools: Torque wrench (with size 41 open-ended spanner attachment), see page 20: ■ ■ NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 22: Installation

    To prevent current leaks, maintain a minimum distance of 14 mm between the electrode ■ ■ and earth (flange or tank wall). Check the boiler connection and flange during the preliminary boiler inspection. ■ ■ NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 23: Sealing Surface Dimensions For Nrg 26-60

    I. Sealing ring D 27 x 32 ◆ ■ DIN 7603-2.4068, bright annealed Prohibited seal materials: Hemp, PTFE tape ■ ■ Conductive paste or grease ■ ■ Fig. 8 NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 24: Installing Two Level Electrodes In A Flange

    Screw in the second electrode and tighten the nut in the body to a torque of 25 Nm. Reconnect the electrode wiring to the PCB. Close the rear body panel of the second electrode and screw back on. Installation example with dimensions, see Fig. 11, page 27 NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 25: Installation Examples With Dimensions

    Protective tube (provided on site) for internal installation Image not to scale. Key, see page 30 G ¾ DN 50 ≥ 14 ≤ 90° Ø 20 Fig. 9 All lengths and diameters in mm NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 26 Protective tube (provided on site) for internal installation. Image not to scale. Key, see page 30 G ¾ DN 50 ≥ 14 ≤ 90° Ø 20 Fig. 10 All lengths and diameters in mm NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 27 Installation examples with dimensions Protective tube (provided on site) for internal installation, combined with other GESTRA AG devices. Image not to scale. Key, see page 30 G ¾ G ¾ DN 100 24.5-26.0 24.5-26.0 ≥ 14 " ≤ 90° Ø 20 Fig.
  • Page 28 Level pot (≥ DN 80) for external use. Image not to scale. Key, see page 30 G ¾ ≥ DN 20 ≥ 14 § ≥ DN 20 ≥ DN 20 Fig. 12 All lengths and diameters in mm NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 29 The level electrode must not be at an incline of more than 45°, and the length of the electrode rod is limited to 688 mm maximum. Image not to scale. Tube e.g. 33.7 x 3.2 Fig. 13 All lengths and diameters in mm NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 30: Aligning The Terminal Box

    If necessary, you can orientate the display in the desired direction by rotating the terminal box. ATTENTION Rotating the terminal box ≥ 180° will damage the level electrode’s internal wiring. Never rotate the terminal box more than 180 degrees in either direction. ■ ■ NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 31: Functional Element S

    Cover screws M4 x 16 mm Operating panel with 4-digit LED display/alarm and status LEDs and rotary knob, see page 41 M12 CAN bus socket, 5-pole, A-coded M12 CAN bus connector, 5-pole, A-coded Fig. 14 NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 32: Connecting The Can Bus System

    - 0 V 120 Ω + 24 V CH = CAN High 24V DC CL = CAN Low Ω S = Shield – 100 - 240 V AC Terminating Fig. 15 resistor NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 33: Important Notes On Connecting The Can Bus System

    Fig. 16. Connector Coupling Fig. 16 Shield (screen) + 24 V Power supply - 0 V Power supply CAN High data line CAN Low data line NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 34: Bringing Into Service

    During commissioning, the scaling of the measurement 0 – 100 % is set ex-works at a maxi- mum for the corresponding electrode length. After installation, set the measurement range to effective, system-specific values. NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 35 If you do not set a parameter within 10 seconds, the process is aborted (“quit”) and the old parameter value is retained. Save your set value by pressing the rotary knob for approx. 1 second. The response “donE” appears and the display returns to the parameters. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 36: Notes On Changing The Communication Parameter "Grp Or Bd.rt

    (ConP = oFF) Notes on changing the communication parameter “GrP or bd.rt” In general, all GESTRA AG CAN bus devices are delivered ex-works with pre-set communi- cation parameters that make it possible to bring a standard system into service without any changes.

  • Page 37: Changing The Controller Group "Grp

    Press and hold the rotary knob until the current baud rate flashes on the display. Set the desired baud rate (50 kBit/s or 250 kBit/s). Save your set value by pressing the rotary knob for approx. 1 second. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 38: Performing A Calibration To The Lower Bound Of The Active Measurement Range "Cal.l" (0 % Calibration Value)

    Press and hold the rotary knob until the value (e.g. 0025) appears. The last digit flashes. Set the required measured value > 25 % of the set level. Save your set value by pressing the rotary knob for approx. 1 second. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 39: Performing A Calibration To The Upper Bound Of The Active Measurement Range "Cal.h" (100 % Calibration Value)

    Faulty equipment jeopardises system safety. If numbers or decimal points are displayed incorrectly or not at all, you must replace the ■ ■ level electrode with an identical unit from GESTRA AG. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 40: Activating Urb 2 Compatibility "Conp

    Incorrectly installed or bent level electrodes result in a loss of function that can jeopard- ise system safety. Proceed as follows every time you bring the NRG 26-60 level electrode into service or change it: Check the MIN and MAX limit values of the NRR 2-6x level controller by exceeding the upper ■...

  • Page 41: Starting, Operation And Testing

    Priority in fault code display Higher value fault codes overwrite lower value codes in the display! Fault signals according to fault code table, see page 44 ff. NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 42 If the level electrode does not behave as described above, it may be faulty. ■ ■ Perform failure analysis. ■ ■ The NRG 26-60 level electrode may only be repaired by the manufacturer, GESTRA AG. ■ ■ Only replace faulty equipment with identical equipment from GESTRA AG. ■ ■...

  • Page 43: System Malfunctions

    Switch off the voltage to the system and secure so that it cannot be switched back on. ■ ■ Check that the system is not carrying live voltage before commencing work. ■ ■ NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 44: Indication Of System Malfunctions Using Fault Codes

    (1nF || 47pF) Measured value channel 1 with E.010 PWMTSTCh1Err Replace the level electrode deactivated measurement signal Measured value channel 2 with E.011 PWMTSTCh2Err Replace the level electrode deactivated measurement signal NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 45 Virtually all of the aforementioned fault codes can be caused by EMC interference. This is less likely to be the case in the event of permanent faults, but should be considered for sporadic fault messages. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 46: Faults During Use

    The measurement range is set incorrectly ■ ■ Check the electrode and protective tube for contamina- ■ ■ The electrode or protective tube is contaminated. ■ ■ tion and clean if necessary. NRG 26-60 - Installation & Operating Manual - 819875-00...
  • Page 47 If the temperature rises above 75 °C, the fault code be reduced, for example through cooling. E.027 (Overtemp Err) appears and a fault or alarm shutoff occurs at NRR 2-60, NRR 2-61. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 48: Checking Installation And Function

    ■ ■ is replaced. The system faults in the NRG 26-60 level electrode lead to a fault shutoff in the level controller NRR 2-60 / NRR 2-61. The alarm contacts switch without delay. For information on precisely how the alarm contacts function, please read the Installation & Operating Manual of the corresponding NRR 2-60 or NRR 2-61.

  • Page 49: Taking Out Of Service

    Unplug the connections of the CAN bus control lines and plug them into one another. Next, remove the level electrode. An alarm is triggered when the CAN bus cable is interrupted. NRG 26-60 - Installation & Operating Manual - 819875-00...

  • Page 50: Cleaning The Level Electrode

    The term media can refer to solid, liquid or gaseous substances or mixtures, as well as radia- tion. GESTRA AG only accepts returned products with a filled-out and signed return note, along with a filled-out and signed decontamination declaration. The return confirmation and decontamination declaration must be attached to the outside of the return package, as processing will otherwise be impossible and the products will be returned to the sender at their expense.

  • Page 51: Eu Declaration Of Conformity

    EU Declaration of Conformity We hereby declare that the NRG 26-60 level electrode conforms to the following European Directives: Directive 2014/68/EU EU Pressure Equipment Directive ■ ■ Directive 2014/35/EU Low Voltage Directive ■ ■ Directive 2014/30/EU EMC Directive ■ ■...
  • Page 52 You can find our authorised agents around the world at: www.gestra.com GESTRA AG Münchener Straße 77 28215 Bremen Germany Phone +49 421 3503-0 +49 421 3503-393 E-mail info@de.gestra.com www.gestra.com 819875-00/08-2019cm (808949-00) · GESTRA AG · Bremen · Printed in Germany...

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