GESTRA NRR 2-61 User manual

Original Installation &
Operating Manual
EN
English
Level Controller
NRR 2-61
819694-00

2NRR 2-61 - Installation & Operating Manual - 819694-00
Contents
Content of this Manual................................................................................................................................... 4
Scope of delivery/Product package............................................................................................................... 4
How to use this Manual.................................................................................................................................. 5
Illustrations and symbols used...................................................................................................................... 5
Hazard symbols in this Manual...................................................................................................................... 5
Types of warning ............................................................................................................................................ 6
Specialist terms/Abbreviations...................................................................................................................... 7
Usage for the intended purpose..................................................................................................................... 8
Applicable directives and standards...........................................................................................................9
Improper use .................................................................................................................................................. 9
Basic safety notes ........................................................................................................................................ 10
Required personnel qualifications............................................................................................................... 10
Notes on product liability............................................................................................................................. 10
Function ........................................................................................................................................................ 11
Possible combinations of functions and equipment.................................................................................. 11
Technical data .............................................................................................................................................. 12
Name plate/Identification NRR 2-61............................................................................................................ 14
Factory settings............................................................................................................................................ 15
Functional elements and dimensions.......................................................................................................... 16
Installing the NRR 2-61 level controller....................................................................................................... 17
Electrical connection safety notes............................................................................................................... 17
Wiring diagram for NRR 2-61 level controller ............................................................................................. 18
Wiring diagram for NRR 2-61 level controller as 3-component regulator ................................................. 19
Electrical connection.................................................................................................................................... 20
Bus line, cable length and cross-section .................................................................................................. 20
Connecting the 24V DC power supply ......................................................................................................20
Connecting output contacts .....................................................................................................................20
Notes on connecting inductive loads........................................................................................................ 20
Connecting the actual value output OUT1 and analogue output OUT2 (4 - 20 mA) ....................................20
Wiring diagram of CAN bus system............................................................................................................. 21
Example ..................................................................................................................................................21
Important notes on connecting the CAN bus system................................................................................. 21

3NRR 2-61 - Installation & Operating Manual - 819694-00
Contents
Changing the equipment settings................................................................................................................ 22
Configuring the controller group and baud rate ........................................................................................ 23
Setting the measuring range ....................................................................................................................... 24
Bringing into service – start, operation and alarm..................................................................................... 25
The MIN2/MAX2 relays are configured as the MIN/MAX alarm on the URB 60 ..........................................25
The MIN2/MAX2 relays are configured as the pump 1/2 enable (ON/OFF) on the URB 60..........................26
Behaviour in the event of a malfunction ................................................................................................... 26
System malfunctions.................................................................................................................................... 27
Causes ....................................................................................................................................................27
Check the installation and configuration before systematic troubleshooting ............................................. 27
Indication of system malfunctions............................................................................................................28
What to do in the event of system malfunctions......................................................................................... 29
Taking out of service.................................................................................................................................... 29
Disposal ........................................................................................................................................................ 29
Returning decontaminated devices............................................................................................................. 29
EU Declaration of Conformity....................................................................................................................... 30

4NRR 2-61 - Installation & Operating Manual - 819694-00
Content of this Manual
Product:
Level controller NRR 2-61
First edition:
BAN 819694-00/08-2019cm
Applicable documents:
Installation & Operating Manual BAN 819699-xx for URB 60 Visual Display and Operating Unit
You can find the latest Installation & Operating Manuals on our website:
http://www.gestra.com/documents/brochures.html
© 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 Level controller NRR 2-61
 1 x Installation & Operating Manual

5NRR 2-61 - Installation & Operating Manual - 819694-00
How to use this Manual
This Installation & Operating Manual describes the correct use of the NRR 2-61 level controller. 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 & Operating Manual and understood its contents.
 Read this Manual in full and follow all instructions.
 Please also read the instructions for use of any accessories.
 The Installation & Operating Manual is part of the equipment package. Keep it in an easily accessible
location.
Availability of this Installation & Operating Manual
 Make sure this Installation & Operating Manual is always available to the operator.
 If you pass on or sell the equipment to a third party, please also hand over the Installation & Operating
Manual.
Hazard symbols in this Manual
Danger zone/Dangerous situation
Danger of death from electric shock
Illustrations and symbols used
1. Action to be taken
2.
 Lists
 Bullet points in lists
A Keys to illustrations
Additional
information
Read the relevant Installation & Operating Manual

6NRR 2-61 - Installation & Operating Manual - 819694-00
Types of warning
DANGER
Warning of a dangerous situation that results in death or serious injury.
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.

7NRR 2-61 - Installation & Operating Manual - 819694-00
Specialist terms/Abbreviations
Here, we explain some abbreviations, specialist terms, etc., which are used in this Manual.
CAN (Controller Area Network) bus
Data transmission standard and interface for connecting electronic equipment,sensors and control systems.
Data can be sent and received.
TRV .. / NRG .. / LRG ... / SRL ...
GESTRA equipment and type designations, see page 8.
PhotoMOS output
PhotoMOS are a special kind of semiconductor relay, which use a light-emitting diode on the input side that
is optically coupled to an output transistor. This type of electrically non-conductive connection makes sure
the input and output circuits are electrically isolated from each other.
PI controller
Controller with proportional (P) and integral (I) control.
SELV
Safety Extra Low Voltage

8NRR 2-61 - Installation & Operating Manual - 819694-00
Usage for the intended purpose
The NRR 2-61 level controller can be used in conjunction with NRG 26-60 and NRG 26-61 level electrodes
as a water level controller and limit switch in steam and water boilers and in condensate and feedwater
tanks.
Combinations with a URW 60 universal converter*
The NRR 2-61 level controller can also be used for the above applications in combination with a URW 60
universal converter * and an external level electrode (with a current output of 4-20 mA).
* The URW 60 universal converter converts the analogue 4-20 mA signals from the level electrodes
into CAN bus signals.
Configuration, operation and visual display
The equipment is configured and operated and information is viewed via the URB 60 visual display and
operating unit.
Overview of possible unit combinations
Level controller Level electrode Universal converter
(analogue to CAN bus) Visual display and operating unit
NRR 2-61
NRG 26-60
NRG 26-61 - URB 60
Ext. 4 - 20 mA URW 60 URB 60
Fig. 1
Key to Fig. 1:
NRR = level controller
NRG = level electrode
URW = universal converter
URB = visual display and operating unit
To ensure the proper use of equipment during all types of use, you must also read the
Installation & Operating Manuals for the system components used.
 You can find the latest Installation & Operating Manuals for the system components named
in Fig. 1 on our website:
http://www.gestra.com/documents/brochures.html

9NRR 2-61 - Installation & Operating Manual - 819694-00
Usage for the intended purpose
Applicable directives and standards
The NRR 2-61 level controller has been tested and approved for use in the scope governed by the follow-
ing directives and standards:
Directives:
 Directive 2014/35/EU Low Voltage Directive
 Directive 2014/30/EU EMC Directive
 Directive 2011/65/EU RoHS Directive
Standards:
 DIN EN 60730-1 Automatic electrical controls – Part 1:
General requirements
 EN 61326-1 Electrical equipment for measurement, control and laboratory use –
EMC requirements
Standards documents:
 VdTÜV Bulletin BP WASS 0100-RL
Requirements for water level control and limiting equipment
Improper use
There is a danger of death due to explosion if the equipment is used in potentially explo-
sive atmospheres.
Do not use the equipment in potentially explosive atmospheres.

10 NRR 2-61 - Installation & Operating Manual - 819694-00
Basic safety notes
There is a risk of electric shock during work on electrical systems.
 Always switch off the voltage to the equipment before performing work on the terminal
strips.
 Check that the system is not carrying live voltage before commencing work.
Faulty equipment jeopardises system safety.
 If the NRR 2-61 level controller does not behave as described on pages 25 to 26, it
may be faulty.
 Perform failure analysis.
 Only replace faulty equipment with identical equipment from GESTRA AG.
Required personnel qualifications
Activity Personnel
Integration in control system Specialist staff Plant designer
Installation/electrical
connection/bringing into service Specialist staff Electrician/installer
Operation Boiler service technician Staff trained by the plant operator
Maintenance work Specialist staff Electrician
Setup work Specialist staff Plant construction
Fig. 2
Notes on product liability
We the manufacturer cannot accept any liability for damages resulting from improper use of the equip-
ment.