GESTRA NRG 19-11 User Manual

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Installation Instructions 818578-05

Level Electrode

NRG 16-11, NRG 17-11, NRG 19-11,

NRG 111-11

GESTRA Steam Systems

NRG 16-11

NRG 17-11

NRG 19-11

NRG 111-11

EN

English

Questions and Answers:

E
erin31Aug 8, 2025
What to do if LED alarm 1 or 2 and Diagnosis LED 3 are illuminated on GESTRA Switch?
- A
  Andrew SmithAug 8, 2025
  If the LED alarm 1 or 2 and Diagnosis LED 3 are illuminated on your GESTRA Switch, and pressing and holding down key 1 or 2 doesn't resolve the issue, it could be due to a malfunction in the processor or a stand-by fault. Refer to the operating instructions for the logic unit SRL and consider replacing the level switch. It could also indicate an internal voltage fault, in which case you should replace the level switch.
J
Jennifer HigginsAug 17, 2025
Why is the Diagnosis LED 3 flashing on my GESTRA Switch?
- A
  Amanda WallAug 18, 2025
  If the Diagnosis LED 3 is flashing on your GESTRA Switch, it may be due to interference voltage causing a malfunction, or the boiler earth may be without PE. To resolve this, provide screen and earthing, and connect the boiler with PE.
C
cody14Aug 27, 2025
What to do if LED alarm 1 and diagnosis LED 1 are illuminated on GESTRA Switch?
- T
  Terri WilsonAug 28, 2025
  If LED alarm 1 and diagnosis LED 1 are illuminated on your GESTRA Switch, and pressing and holding down key 1 doesn't resolve the issue, it could indicate a malfunction in the level electrode or level switch, faulty wiring, or a faulty measuring voltage. Check the wiring, measure electrode voltages, clean and, if necessary, exchange the level electrode, and exchange the level switch.

GESTRA NRG 19-11 Specifications

General

Brand	GESTRA
Model	NRG 19-11
Category	Accessories
Language	English

Summary

Important Notes

Usage for the intended purpose

Safety note

Emphasizes that installation and commissioning must be done by qualified staff.

Danger

Warns about risks of burns and scalds from hot water and steam.

Explanatory Notes

Function

Details how the level electrode and switch operate using conductivity for water level.

Technical Data

NRG 16-11, NRG 17-11, NRG 19-11

Provides type approval, service pressure, connection, and materials for specific models.

NRG 111-11

Details type approval, service pressure, connection, and materials for the NRG 111-11 model.

Name plate / marking

Explains the information present on the equipment's designation plate.

Dimensions NRG 16-11, NRG 17-11, NRG 19-11

Dimensions NRG 111-11

Functional Elements

NRG 111-11, optional for NRG 16-11, NRG 17-11, NRG 19-11

Installation

NRG 16-11, NRG 17-11, NRG 19-11, NRG 111-11, step 1

Details the first step of the installation process for all NRG models.

NRG 16-11, NRG 17-11, NRG 19-11, NRG 111-11, step 2

Examples of Installation

NRG 16-11, NRG 17-11, NRG 19-11

NRG 111-11

Electrical Connection

NRG 16-11, NRG 17-11, NRG 19-11

NRG 111-11, optional for NRG 16-11, NRG 17-11, NRG 19-11

Wiring diagram

Provides schematic diagrams for wiring the NRG electrodes with the NRS 1-7 controller.

Voltage table

Operation

Low-level limiter

Fault-finding list for troubleshooting

Provides a guide to identify and resolve common faults and malfunctions.

Decommissioning

Related product manuals

GESTRA NRG 16-11

GESTRA NRG 16-36