Flowserve GESTRA NRG 16-42 Installation Instructions Manual
1
NRG 16-42
Installation Instructions 810295-03
Level electrode NRG 16-42
GESTRA Steam Systems
GESTRA
2
Contents
Usage for the intended purpose ..............................................................................................................4
Safety note .............................................................................................................................................4
Danger ...................................................................................................................................................4
Attention .................................................................................................................................................4
ATEX (Atmosphère Explosible) .................................................................................................................4
Important Notes
Page
Explanatory Notes
Scope of supply ......................................................................................................................................5
Description .............................................................................................................................................5
Function .................................................................................................................................................5
System components ...............................................................................................................................5
Design .................................................................................................................................................... 5
NRG 16-42 ...........................................................................................................................................12
Attention ...............................................................................................................................................12
Note .....................................................................................................................................................12
Tools .....................................................................................................................................................12
Examples of installation NRG 16-42 ..................................................................................................... 13
Key .......................................................................................................................................................14
Installation
NRG 16-42 .............................................................................................................................................
6
Corrosion resistance ...............................................................................................................................7
Sizing .....................................................................................................................................................7
Name plate / marking .............................................................................................................................7
Dimensions NRG 16-42 ..........................................................................................................................
8
Technical data
NRG 16-42 .............................................................................................................................................9
Key .......................................................................................................................................................11
Design
NRG 16-42 ...........................................................................................................................................10
Key .......................................................................................................................................................11
Functional Elements
3
Wiring
NRG 16-42 ...........................................................................................................................................15
Aligning terminal box ............................................................................................................................15
Note .....................................................................................................................................................15
Wiring diagram .....................................................................................................................................16
Attention ...............................................................................................................................................17
Tools .....................................................................................................................................................17
Contents continued
Page
Basic Settings
CAN Bus ...............................................................................................................................................18
Node ID ................................................................................................................................................18
Attention ...............................................................................................................................................18
Factory setting ......................................................................................................................................18
Factory set default node IDs ..................................................................................................................19
Assigning / changing node ID ................................................................................................................19
Attention ...............................................................................................................................................19
Code switch settings for node ID / baud rate .........................................................................................20
Commissioning
Check wiring ........................................................................................................................................21
Apply mains voltage..............................................................................................................................21
Operation
Level electrode with CAN bus................................................................................................................21
Note .....................................................................................................................................................21
Malfunctions
Fault finding list for troubleshooting ................................................................................................ 21-22
Decommissioning
Danger .................................................................................................................................................23
Disposal................................................................................................................................................23
Annex
Declaration of conformity ......................................................................................................................23
4
Important Notes
Danger
When loosening the electrode live steam or hot water might escape.
This presents the danger of severe scalding. It is therefore essential not to dismantle
the electrode unless the boiler pressure is verified to be zero.
The electrode is hot during operation. This presents the risk of severe burns to hands
and arms. Installation and maintenance work should only be carried out when the
system is cold.
If the internal ceramic insulation breaks, hot steam can escape through the lateral vent
hole on the electrode body. This presents the risk of severe scalding. Do not stay near
the electrode during operation.
Usage for the intended purpose
Use level electrode NRG 16-42 only in conjunction with level switch NRS 1-42.
Safety note
The equipment must only be installed and commissioned by qualified and adequately trained
personnel.
Maintenance and retrofitting must only by performed by entrusted personnel who – through adequate
training – have achieved a recognised level of competence.
Attention
The name plate indicates the technical specification on the equipment.
Do not commission or operate equipment without a name plate.
ATEX (Atmosphère Explosible)
According to the European Directive 94/9/EC the equipment must not be used in explosion-risk areas.
5
Explanatory Notes
Scope of supply
NRG 16-42
1 Level electrode type NRG 16-42
1 Joint ring (of stainless steel 1.4301) D 33 x 39 to DIN 7603, bright annealed
1 Terminating resistor 120
Ω
1 Installation manual
Description
The level electrode NRG 16-42 works according to the conductivity measurement principle.
With the NRG 16-42 a maximum of 4 levels can be signalled in conductive liquids:
■4 levels with one switchpoint each.
■ High level (MAX) alarm, Low level (MIN) alarm, pump ON, pump OFF with one switchpoint each.
Use level electrode NRG 16-42 in combination with level switch type NRS 1-42 or further system
components. The level data are transferred to the level switch or another system component via
CAN data bus, using the CANopen protocol.
System components
NRS 1-42
Data exchange: CAN bus to DIN ISO 11898, using CANopen protocol.
URB 1, URB 2
Control terminal & display unit.
Functions: Parameterization and visual display (LCD).
Data exchange: CAN bus to DIN ISO 11898, using CANopen protocol.
Design
NRG 16-42:
Screwed design 1" BSP, EN ISO 228-1. Fig. 2
Function
The conductivity of the liquid is used to signal the liquid level. Some liquids are conductive, which
means that they allow an electric current to flow through them.
For the safe functioning of this device a minimum conductivity of the liquid to be measured is required.
The conductivity measurement method can detect two conditions: electrode rod submerged or
exposed, meaning switchpoint reached (or exceeded) or not yet reached. Before installation, the
length of the electrode rod must be cut to the required switching levels, e. g. for max./min. alarm,
controlling of a valve or pump.
At regular intervals the level electrode NRG 16-42 sends a data telegram to the level switch NRS 1-42.
The data are transferred via a CAN bus to DIN ISO 11898 using the CANopen protocol.
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NRG 16-42
Type Approval Nº
TÜV · WR · 04-399
Max. service pressure
32 bar g at 238°C
Connections
Screwed 1" BSP, DIN ISO 228-1
Flanged DN 50, PN 40, DIN 2635
Materials
Case: Die cast aluminium 3.2161 (G AlSi8Cu3)
Stem: S. S. 1.4571 (X6CrNiMoTi17-12-2)
Measuring electrodes: S. S. 1.4401 (X5CrNiMo17-12-2)
Electrode insulation: PEEK
Spacer disc: PTFE
Lengths supplied
500 mm
1000 mm
1500 mm
Supply voltage
18 – 36 V DC
Current consumption
65 mA
Fuse
Thermal fuse T
max
= 85°C
Hysteresis
-2 K
Electrode voltage
10 V
ss
Data exchange
CAN bus to DIN ISO 11898, CANopen protocol
Indicators and adjustors
1 green LED “C
an bus CommuniCation”
1 red LED “b
us fault”
1 10-pole code switch for node ID and baud rate settings
Electric connection
M 12 sensor connector, 5 poles, A-coded,
M 12 sensor jack, 5 poles, A-coded
Protection
IP 65 to DIN EN 60529
Max. admissible ambient temperature
70 °C
Weight
approx. 2.5 kg
Technical data
7
Technical Data continued
Corrosion resistance
When used for its intended purpose the safe functioning of the electrode will not be impaired by
corrosion.
Sizing
The electrode body must not be subjected to sharp increases in pressure. Welds and flanges of the
electrode are designed to withstand dynamic loading (bending and alternating stress). The dimensional
allowances for corrosion reflect the latest state of technology.
Name plate / marking
NRG 16-42
PN 40 G1 1.4571 IP 65
0,5 / 10µS/cm
Betriebsanleitung
beachten
See installation instructions
Voir instructions de
montage
32 bar ( 464 psi)
238 °C ( 453 °F)
Tmax = 70°C (133 °F)
Pmax
Tmax
IN/OUT: CAN-Bus
Münchener Str. 77, D-28215 Bremen
GB Reg. Design 2 053 113
US Pat. 5 719 342, 5 805 052,
Design 383 403
18-36 V DC
Node ID:__ __ __
TÜV.WR.99-399
GESTRA AG
SER Nr.:
Designation of
the equipment
Fig. 1
8
4
3
GESTRA SteamSys tems
GESTRA
NRG 16-42
4
3
1
2
Fig. 2
Technical Data continued
Dimensions NRG 16-42
175
Depth: 70mm
140
337.5
500, 1000, 1500
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