GESTRA LRR 1-60 User manual

Original Installation &
Operating Manual
EN
English
Conductivity Controller
LRR 1-60
819692-00

2LRR 1-60 - Installation & Operating Manual - 819692-00
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..................................................................................................................... 9
Applicable directives and standards.........................................................................................................10
Improper use ................................................................................................................................................ 10
Basic safety notes ........................................................................................................................................ 11
Required personnel qualifications............................................................................................................... 11
Notes on product liability............................................................................................................................. 11
Function ........................................................................................................................................................ 12
Possible combinations of functions and equipment.................................................................................. 12
Technical data .............................................................................................................................................. 13
Name plate/Identification LRR 1-60 ............................................................................................................ 15
Factory settings............................................................................................................................................ 16
Functional elements and dimensions.......................................................................................................... 17
Installing the LRR 1-60 conductivity controller .......................................................................................... 18
Electrical connection safety notes............................................................................................................... 18
Wiring diagram of LRR 1-60 conductivity controller .................................................................................. 19
Electrical connection.................................................................................................................................... 20
Bus line, cable length and cross-section ..................................................................................................20
Connecting the 24V DC power supply ...................................................................................................... 20
Connecting the MIN/MAX/CLOSED/OPEN output contacts.........................................................................20
Notes on connecting inductive loads........................................................................................................ 20
Connecting the actual value output (4 - 20 mA)........................................................................................20
Connecting the standby input (24 V DC) ...................................................................................................20
Connecting the potentiometer (0 - 1000 W).............................................................................................20
Wiring diagram of CAN bus system............................................................................................................. 21
Example ..................................................................................................................................................21
Important notes on connecting the CAN bus system................................................................................. 21

3LRR 1-60 - Installation & Operating Manual - 819692-00
Contents
Changing the equipment settings................................................................................................................ 22
Configuring the controller group and baud rate ........................................................................................ 23
Bringing into service – start, operation and alarm..................................................................................... 24
The MIN relay is configured as the MIN alarm on the URB 60................................................................... 24
The MIN relay is configured for automatic intermittent blowdown on the URB 60..................................... 25
Behaviour in the event of a malfunction ................................................................................................... 25
System malfunctions.................................................................................................................................... 26
Causes ....................................................................................................................................................26
Check the installation and configuration before systematic troubleshooting ............................................. 26
Indication of system malfunctions............................................................................................................27
What to do in the event of system malfunctions......................................................................................... 28
Taking out of service.................................................................................................................................... 28
Disposal ........................................................................................................................................................ 28
Returning decontaminated equipment........................................................................................................ 28
EU Declaration of Conformity....................................................................................................................... 29

4LRR 1-60 - Installation & Operating Manual - 819692-00
Content of this Manual
Product:
Conductivity Controller LRR 1-60
First edition:
BAN 819692-00/08-2019cm
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 Conductivity Controller LRR 1-60
 1 x Installation & Operating Manual

5LRR 1-60 - Installation & Operating Manual - 819692-00
How to use this Manual
This Installation & Operating Manual describes the correct use of the LRR 1-60 conductivity 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

6LRR 1-60 - Installation & Operating Manual - 819692-00
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.

7LRR 1-60 - Installation & Operating Manual - 819692-00
Specialist terms/Abbreviations
Here, we explain some abbreviations, specialist terms, etc., which are used in this Manual.
Blowdown controller
A blowdown controller is a conductivity controller with special features for actuating continuous blow-
down valves on pressurised steam plants. It can also be used as a conductivity controller in other types of
system.
Continuous blowdown
Continuous or periodic removal of a certain (defined) quantity of boiler water via a continuous blowdown
valve, e.g. BAE46 or BAE47.
To determine the total dissolved solids in the boiler water, its electrical conductivity is measured in μS/cm,
although some countries also use ppm (parts per million) as the unit of measurement.
Conversion: 1 μS/cm = 0.5 ppm.
Intermittent blowdown
Intermittent blowdown is achieved by the abrupt opening of the intermittent blowdown valve. The opening
time should be around 3 seconds.
Time-based pulse/interval actuation of the intermittent blowdown valve optimises the removal of sludge
from the boiler. The interval between the intermittent blowdown pulses can be set between 1 and 200 h
(intermittent blowdown interval). The duration of intermittent blowdown can be set between 1 and 10 s.
For large boilers, repeated intermittent blowdown pulses may be required. Repetition can be set between
1 and 10 with an interval from 1 – 10 seconds (pulse interval).
Flushing the continuous blowdown valve
The continuous blowdown valve can be flushed automatically to prevent it from sticking. In this case, the
continuous blowdown valve is actuated at intervals (flushing interval) and opened for a certain time (flushing
time). After the flushing time, the valve moves to the position set by the control.
Standby mode (conductivity control)
To prevent loss of water, continuous blowdown control and automated intermittent blowdown (if enabled)
can be disabled in standby mode or when the burner is switched off.The continuous blowdown valve moves
to CLOSED position, triggered by an external control command. In standby mode, the MIN/MAX limits and
monitoring function remain active.
When the equipment is back in normal mode, the continuous blowdown valve returns to the control position.
An intermittent blowdown pulse is also triggered (if automated intermittent blowdown is enabled and a
blowdown interval and blowdown time have been set).

8LRR 1-60 - Installation & Operating Manual - 819692-00
Specialist terms/Abbreviations
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 9.
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

9LRR 1-60 - Installation & Operating Manual - 819692-00
Usage for the intended purpose
The LRR 1-60 conductivity controller can be used in conjunction with LRG 16-60, LRG 16-61 and LRG 17-
60 conductivity electrodes as a conductivity controller in pressurised steam and hot-water plants and in
condensate and feedwater tanks. The conductivity controller indicates when MAX or MIN conductivity has
been reached, opens or closes a continuous blowdown valve and can actuate an intermittent blowdown
valve.
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
Conductivity controller Conductivity electrode Visual display and operating unit
LRR 1-60
LRG 16-60
LRG 16-61
LRG 17-60
URB 60
Fig. 1
Key to Fig. 1:
LRR = conductivity controller
LRG = conductivity electrode
URB = visual display and operating unit
To ensure the proper use of equipment during all types of use, you must also read the Installa-
tion & 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

10 LRR 1-60 - Installation & Operating Manual - 819692-00
Usage for the intended purpose
Applicable directives and standards
The LRR 1-60 conductivity controller has been tested and approved for use in the scope governed by the
following 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 WÜ 0100-RL
Requirements for the testing of monitoring 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.