GESTRA LRG 16-4 Manuel de service
1
LRG 16-4
Installation Instructions 818854-01
Conductivity Electrode LRG 16-4
GESTRA Steam Systems
EN
English
2
Contents
Page
Important notes
Usage for the intended purpose...............................................................................................................4
Function..................................................................................................................................................4
Safety note..............................................................................................................................................5
Directives and standards
EC Pressure Equipment Directive 97/23/EC.............................................................................................6
VdTÜV Bulletin "Water Monitoring 100"...................................................................................................6
ATEX (Atmosphère Explosible) .................................................................................................................6
Note on the Declaration of Conformity / Declaration by the Manufacturer ..........................................6
Technical data
LRG 16-4 ................................................................................................................................................7
Scope of supply ......................................................................................................................................7
Name plate / marking .............................................................................................................................7
Installation
Dimensions LRG 16-4 .............................................................................................................................8
Mounting conductivity electrode..............................................................................................................9
Key .........................................................................................................................................................9
Tools.......................................................................................................................................................9
Examples of installation
LRG 16-4 ..............................................................................................................................................10
Key .......................................................................................................................................................11
Electrical connection
LRG 16-4 with four-pole connector .......................................................................................................12
Key .......................................................................................................................................................12
Tools.....................................................................................................................................................12
Connecting the conductivity electrode...................................................................................................13
LRG 16-4, connecting the four-pole connector .....................................................................................13
Troubleshooting
Indication, diagnosis and remedy ..........................................................................................................14
3
Contents
Page
- continued -
Maintenance
Safety note............................................................................................................................................15
Cleaning measuring electrode...............................................................................................................15
Removing and disposing of the conductivity electrode
Remove and discard conductivity electrode LRG 16-4. ..........................................................................15
4
Important notes
Usage for the intended purpose
The conductivity electrode LRG 16-4 together with the conductivity switch LRS 1-.. or conductivity
controller LRR 1-.. is designed for measuring and monitoring electrical conductivity in conductive
fluids.
If used as conductivity limiter or continuous blowdown controller in steam boilers, the conductivity
electrode LRG 16-4 can be used with the following equipment:
Conductivity switch LRS 1-50
Conductivity controller LRR 1-50
Conductivity controller LRR 1-52
To guarantee a trouble-free operation observe the requirements made on water as specified in the
pertinent TRD and EN regulations.
The equipment must only be used within the admissible pressure and temperature ratings.
Function
The conductivity electrode LRG 16-4 is used in combination with the following equipment as conductivity
limiter and continuous blowdown controller in steam boilers:
Conductivity switch LRS 1-50
Conductivity controller LRR 1-50
Conductivity controller LRR 1-52
In addition the equipment can monitor conductivity in condensate and feedwater systems and in cooling
and cleaning water.
The conductivity electrode works according to the conductivity measurement principle and, in conjunc-
tion with conductivity switches or controllers, monitors the conductivity in conductive fluids.
A short circuit or wire breakage in the conductivity electrode will trigger an error message in the con-
ductivity switch or controller.
5
Important notes
Attention
The name plate specifies the technical features of the equipment. Do not commission or
operate any item of equipment that does not bear its specific name plate.
Safety note
Danger
When loosening the conductivity electrode steam or hot water might escape!
This presents the risk of severe scalding all over the body!
It is therefore essential not to dismantle the conductivity electrode unless the boiler
pressure is verified to be 0 bar.
The conductivity electrode becomes hot during operation.
Risk of severe burns to hands and arms.
Before carrying out installation and maintenance work make sure that the equipment is
cold.
The equipment must only be installed, wired and commissioned by qualified and competent staff.
Retrofitting and maintenance work must only be performed by qualified staff who - through adequate
training - have achieved a recognised level of competence.
- continued -
6
Directives and standards
VdTÜV Bulletin "Water Monitoring 100"
The conductivity electrode LRG 16-4 in conjunction with the following conductivity switches and
controllers is type approved according to VdTÜV Bulletin "Water Level 100": LRS 1-50, LRR 1-50 and
LRR 1-52.
The VdTÜV Bulletin "Water Monitoring 100" states the requirements made on water monitoring
equipment.
ATEX (Atmosphère Explosible)
The conductivity electrode LRG 16-4 is a simple item of electrical equipment as specified in
EN 60079-11 section 5.7. According to the European Directive 94/9/EC the equipment must be
equipped with approved Zener barriers if used in potentially explosive areas. Applicable in Ex zones 1,
2 (1999/92/EC). The equipment is not Ex marked.
The suitability of the Zener barriers is certified in a separate wiring diagram provided by the
manufacturer.
Note on the Declaration of Conformity / Declaration by the Manufacturer
For details on the conformity of our equipment according to the European Directives see our Declaration
of Conformity or our Declaration of Manufacturer.
The current Declaration of Conformity and Declaration of Manufacturer are available in the Internet under
www.gestra.com documents
or can be requested from us.
EC Pressure Equipment Directive 97/23/EC
The conductivity control and monitoring equipment LRG 1.-.., LRS 1-.., LRR 1-5. meet the safety re-
quirements of the Pressure Equipment Directive (PED). The conductivity control & monitoring equipment
is EC type approved according to EN 12952/EN 12953. These Directives state, among other things, the
requirements made on limiting systems and equipment for steam boiler plants and (pressurised) hot-
water installations.
7
LRG 16-4
Service pressure
PN 40, 32 bar at 238°C
Mechanical connection
Screwed G 3/8A, ISO 228
Materials
Screw-in body: 1.4571, X6CrNiMoTi17-12-2
Measuring electrode: 1.4571, X6CrNiMoTi17-12-2
Insulation PTFE
Four-pole connector: polyamide (PA)
Length of measurement & installation
100, 300, 400, 500, 600, 800, 1000 and 1200 mm
Cell constant
1 cm-1
Electrical connection
Four-pole connector, cable gland M 16
Protection
IP 65 to DIN EN 60529
Admissible ambient temperature
Max. 70°C
Weight
Approx. 0.5 kg
Approvals:
TÜV certificate VdTÜV Bulletin "Wasserüberwachung 100" (= Water Monitoring 100):
Requirements made on water level monitoring equipment
Type approval no. TÜV . WÜL . 12-017, 12-018 (see name plate)
Technical data
Name plate / marking
Fig. 1
LRG 16-4
1 Conductivity electrode LRG 16-4
1 Joint ring 17 x 21, form D, DIN 7603, 1.4301, bright annealed
1 Installation manual
Scope of supply
Mat-Nr.:
DN NL=
TÜV . WÜL . 12 - 017 / 12 - 018
32 bar (464psi)
238°C (460°F)
T amb = 60°C (140 °F)
LRG 16-4
GESTRA AG Münchener Straße 77 D-28215 Bremen
Pmax
Tmax
µS
ppm
Betriebsanleitung beachten
See installation instructions
Voir instructions de montage
PN 40 G 3/8 1.4571 IP 65
Equipment designation Safety note
Disposal note
CE Marking
Type approval no.
Manufacturer Pressure rating, thread type,
material number, protection
Application
range
DN of T-type connector
NL = Measuring length and length of
installation
8
Installation
Dimensions LRG 16-4
Ra 3.2
0.5
∅ 23
G
3/8
A, ISO 228
Ra 12.5
Fig. 3
Fig. 4 LRG 16-4 with T-type connector
170
DN ABC
15 118 95 16
20 129 105 18
25 137 115 18
40 180 150 18
B
A
C
B
C
Fig. 2
LRG 16-4 with four-pole connector
1
2
3
4
Screwed G 3/8A,
ISO 228
190
70
22
9
Note
For the approval of the boiler standpipe the relevant regulations must be considered.
Refer to pages 10 and 11 for typical installation examples.
If installed outdoors the level electrode must be equipped with a GESTRA weather
protection cover.
Installation
Attention
Install conductivity electrode horizontally or with a vertical inclination. The measuring
surface must be permanently submerged.
The seating surfaces of the standpipe or the flange provided on the vessel must be
accurately machined, see Fig. 3 .
Do not subject measuring electrode to physical shocks.
Use only the supplied ring joint 17 x 21, form D, DIN 7603, made from 1.4301, bright
annealed!
Do not lag electrode body above the hexagonal section.
Do not insulate electrode thread with hemp or PTFE tape!
Do not apply conductive paste or grease to the electrode thread!
Provide a spacing of approx. 40 mm between the lower end of the measuring elec-
trodes and the boiler wall, the smoke tubes and any other metallic fittings and the low
water level (LW).
Observe the specified tightening torque.
Key
1Measuring length and length of installation
2Thermal insulation, provided on site, d = 20 mm,
(outside of thermal insulation of steam boiler)
Mounting conductivity electrode
1. Check seating surfaces. Fig. 3
2. Place the supplied ring joint 4onto the seating surface of the threaded standpipe or flange.
3. Apply a light smear of heat resistant silicone grease (e. g. WINIX® 2150) to the electrode thread 3.
4. Screw conductivity electrode into threaded standpipe and tighten with an open-end spanner
A. F. 22 mm. The torque required when cold is 63 Nm.
Tools
Open-end spanner 22 mm A. F.
3Electrode thread G 3/8A, ISO 228
4Joint ring 17 x 21,
form D, DIN 7603, 1.4301, bright annealed
- continued -
10
M
NW
LW
NB
R*
Examples of installation
LRG 16-4
Conductivity monitoring and continuous boiler blowdown, direct installation of conductivity
electrode via T-type connector and connection of a continuous blowdown valve
Fig. 5
LRG 16-4
8
6
7
G 3/8A, ISO 228
4
R*: 40 mm
A
~ 250
170
8
5
M
Fig. 6 9
6
Conductivity monitoring, direct installation of conductivity electrode via flanged standpipe on the side of
the boiler or installation of electrode in an external level pot
≥ 40
≥ 100
≥ 40 ≥ 40
7
LW
8
LRG 16-4
Autres manuels pour LRG 16-4
2
Table des matières
Autres manuels GESTRA Émetteur
GESTRA
GESTRA LRGT 16-2 Manuel utilisateur
GESTRA
GESTRA NRGT 26-2n Manuel utilisateur
GESTRA
GESTRA NRGT 26-1S Manuel utilisateur
GESTRA
GESTRA NRGT 26-2 Manuel utilisateur
GESTRA
GESTRA NRGT 26-2 Manuel utilisateur
GESTRA
GESTRA LRGT 16-3 Instructions d'installation
GESTRA
GESTRA LRGT 16-3 Manuel utilisateur
GESTRA
GESTRA NRS 2-1 Guide rapide
GESTRA
GESTRA LRGT 16-3n Manuel utilisateur
GESTRA
GESTRA NRGT 26-2 Manuel utilisateur
Manuels Émetteur populaires d'autres marques
Dejero
Dejero EnGo 3x Manuel utilisateur
Rosemount
Rosemount 4600 Manuel utilisateur
Speaka Professional
Speaka Professional 2342740 Manuel utilisateur
trubomat
trubomat GAB 1000 Manuel utilisateur
Teledyne Analytical Instruments
Teledyne Analytical Instruments LXT-380 Manuel utilisateur
Rondish
Rondish UT-11 Manuel utilisateur
