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GESTRA NRG 26-21 - User Manual

GESTRA NRG 26-21
20 pages
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Installation & Operating Instructions
818774-05
Level Electrode
NRG 26-21
GESTRA Steam Systems
NRG 26-21
EN
English

Table of Contents

Questions and Answers

  • A
    Amanda HughesAug 2, 2025
    What to do if GESTRA Measuring Instruments do not work accurately?
    • D
      davidchavezAug 2, 2025
      If GESTRA Measuring Instruments aren't working accurately, several factors could be the cause. It might be due to the level electrode being installed without a protection tube, which is necessary as a reference electrode; in this case, install a protection tube. Alternatively, the vent hole in the protection tube may be obstructed or flooded; inspect the protection tube and clear the vent hole if needed. If you're using an external level pot, make sure the isolating valves are open. Also, ensure the level electrode is sufficiently long for the desired measuring range. Check and correct the code switch settings and clean the electrode tip if it's covered with dirt. Finally, if the level electrode is submerged and the voltage is not correct, consider replacing it.
  • L
    lewistravisAug 14, 2025
    What to do if GESTRA NRG 26-21 Measuring Instruments fails to work?
    • E
      Erika RayAug 15, 2025
      If GESTRA Measuring Instruments fail to work, first check the power supply and electrical connections to ensure they are properly connected. If there is a power failure, switch on the supply voltage. Another possible cause is an interrupted earth connection to the vessel. To resolve this, clean the seating surfaces and screw in the level electrode together with the joint ring 27 x 32, form D, DIN 7603 (made from 2.4068), bright annealed. Ensure that you do not insulate the electrode with hemp or PTFE tape.

Summary

Important Notes

Critical Safety Precautions

Highlights critical safety precautions for installation, wiring, and maintenance, including dangers.

Technical Data Overview

NRG 26-21 Specifications

Lists technical specifications for the NRG 26-21 level electrode, including pressure, connection, materials, and dimensions.

Electronic Module NRV 2-29 Specs

Installation Guide

Dimensions of NRG 26-21

Installation Continued

NRG 26-21 Installation Notes

Electrical Connection

NRV 2-29 Module Connection

Electrical Connection Continued

Level Electrode Wiring Procedure

Explains how to connect the level electrode using a multi-core cable, specifying cable type and connections.

Terminal Strip Connection Steps

Wiring Diagrams for Controllers

Basic Settings

Factory Setting Configuration

Describes the default factory settings for the code switch controlling the measuring range for water.

Setting Active Measuring Range

Explains how to use the code switch to set the active measuring range based on fluid type and conductivity.

Basic Settings Continued

Active Measuring Range Setup Details

Details the procedure for setting the active measuring range using code switch and diagrams for water with different conductivities.

Active Measuring Range Charts

Continues the explanation of setting the active measuring range with diagrams for water and fuel oil EL, showing output voltage vs. measuring range.

Commissioning Procedure

Applying Supply Voltage

Checking Measuring Range

Checking Measuring Voltages

Explains how to measure supply and level-proportional voltages and compare them with expected values.

Troubleshooting Guide

Malfunction Diagnosis and Remedy

Provides a table to help diagnose and remedy malfunctions related to equipment accuracy and failure.

Maintenance Operations

Maintenance Safety Note

Reiterates safety requirements for qualified personnel during retrofitting and maintenance.

Cleaning the Electrode Rod

Removing and Disposing of Electrode

GESTRA NRG 26-21 Specifications

General IconGeneral
BrandGESTRA
ModelNRG 26-21
CategoryMeasuring Instruments
LanguageEnglish

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