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NRG 16-42
User Manual
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Flowserve NRG 16-42 User Manual

GESTRA
GESTRA Steam Systems
NRG 16-42
Installation Instructions 810295-03
Level electrode NRG 16-42
1
Contents
Page
Important Notes
Explanatory Notes
Scope of supply ...................................................................................................................................... 5
Description .............................................................................................................................................5
Function .................................................................................................................................................5
System components ...............................................................................................................................5
Design .................................................................................................................................................... 5
Technical data
NRG 16-42 .............................................................................................................................................
Dimensions NRG 16-42 ..........................................................................................................................
Design
Functional Elements
NRG 16-42 ...........................................................................................................................................10
Installation
NRG 16-42 ...........................................................................................................................................12
Attention ...............................................................................................................................................12
Note .....................................................................................................................................................12
Tools .....................................................................................................................................................12
Examples of installation NRG 16-42 ..................................................................................................... 13
Key .......................................................................................................................................................14
6
8
2
Contents continued
Page
Wiring
NRG 16-42 ...........................................................................................................................................15
Aligning terminal box ............................................................................................................................ 15
Note .....................................................................................................................................................15
Wiring diagram ..................................................................................................................................... 16
Attention ...............................................................................................................................................17
Tools .....................................................................................................................................................17
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
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
Annex
Declaration of conformity ......................................................................................................................23
3
Important Notes
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.
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.
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.
4
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 1 Installation manual
Description
Ω
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.
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.
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
5
Technical data
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
= 85°C
max
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 1 red LED “b
an bus CommuniCation”
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
6
Technical Data continued
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.:
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
Designation of the equipment
Fig. 1
7
4
3
GESTRAS teamSystems
GESTRA NRG 16-42
4
3
1
2
Technical Data continued
Dimensions NRG 16-42
175
140
337.5 Depth: 70mm
500, 1000, 1500
Fig. 2
8
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