GESTRA
GESTRA Steam Systems
NRG 16-40
NRG 17-40
NRG 19-40
NRG 111-40
Installation Instructions 810590-03
Level Electrode NRG 16-40
Level Electrode NRG 17-40
Level Electrode NRG 19-40
Level Electrode NRG 111-40
1
2
Contents
Page
Important Notes
Usage for the intended purpose ..............................................................................................................4
Safety note .............................................................................................................................................
Danger ...................................................................................................................................................4
Attention .................................................................................................................................................4
PED (Pressure Equipment Directive) ........................................................................................................
ATEX (Atmosphère Explosible) .................................................................................................................
Explanatory Notes
4
4
4
Scope of supply ......................................................................................................................................
Description .............................................................................................................................................5
Function .................................................................................................................................................6
System components ...............................................................................................................................
Design .................................................................................................................................................... 6
Technical Data
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40 ..................................................................................
Corrosion resistance ...............................................................................................................................
Sizing .....................................................................................................................................................8
Name plate / marking .............................................................................................................................
Dimensions 16-40, NRG 17-40, NRG 19-40 ............................................................................................9
Dimensions NRG 111-40 ......................................................................................................................10
Design
NRG 16-40, NRG 17-40, NRG 19-40 ..................................................................................................... 11
NRG 111-40 .........................................................................................................................................
Key .......................................................................................................................................................14
Functional Elements
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40 ................................................................................13
Key .......................................................................................................................................................14
Installation
12
5
6
7
8
8
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40, step 1 ..................................................................... 15
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40, step 2 ..................................................................... 15
Attention ...............................................................................................................................................15
Note .....................................................................................................................................................15
Tools ..................................................................................................................................................... 15
Examples of installation NRG 16-40, NRG 17-40, NRG 19-40 ...............................................................16
Examples of installation NRG 111-40 .................................................................................................. 17
Key .......................................................................................................................................................18
Contents continued
Page
Wiring
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40 ................................................................................19
Aligning terminal box ............................................................................................................................ 19
Note .....................................................................................................................................................19
Wiring diagram ..................................................................................................................................... 20
Attention ...............................................................................................................................................21
Tools ..................................................................................................................................................... 21
Basic Settings
CAN Bus ...............................................................................................................................................
Node ID ................................................................................................................................................
Attention ...............................................................................................................................................22
Factory set default values .....................................................................................................................
Water-level limiting system ...................................................................................................................23
Factory set default node IDs ..................................................................................................................23
Assigning / changing node ID ................................................................................................................23
Attention ...............................................................................................................................................23
Setting code switch ..............................................................................................................................24
Commissioning
Wiring check .........................................................................................................................................25
Apply mains voltage
Operation
Low-level limiter water-level limiting system ........................................................................................25
Note .....................................................................................................................................................25
Emergency Operation
Emergency operation of water-level limiting system..............................................................................25
Attention ...............................................................................................................................................25
Malfunctions
Fault finding list for troubleshooting ...................................................................................................... 26
..............................................................................................................................25
22
22
22
Decommissioning
Danger .................................................................................................................................................27
Disposal................................................................................................................................................27
Annex
Declaration of conformity ......................................................................................................................27
3
4
Important Notes
Usage for the intended purpose
Use level electrodes type NRG 16-40, NRG 17-40, NRG 19-40 and NRG 111-40 in conjunction with level
switch NRS 1-40 or NRS 1-40.1 only as low-water level limiters (low-level alarms).
Safety note
The equipment must only be installed and commissioned by qualified staff.
Maintenance and service work must only be performed by adequately trained persons who have
a recognized level of competence.
Danger
When loosening the electrode steam or hot water might escape.
This presents the danger of severe scalding. It is therefore essential not to remove
the electrode unless the boiler pressure is verified to be zero.
The electrode is hot during operation. This presents the danger 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 of the equipment.
Do not commission or operate equipment without a name plate.
PED (Pressure Equipment Directive)
The equipment fulfills the requirements of the Pressure Equipment Directive (PED) 97/23/EC.
Applicable in fluids of group 1 and 2. With CE marking (apart from equipment according to section 3.3).
ATEX (Atmosphère Explosible)
According to the European Directive 94/9/EC the equipment must
not be used in explosion-risk areas.
Explanatory Notes
Scope of supply
NRG 16-40
1 Level electrode type NRG 16-40
1 S. S. joint ring D 27 x 32 mm to DIN 7603 (made of 1.4301), bright annealed
1 Terminating resistor 120
1 Installation manual
NRG 17-40
1 Level electrode type NRG 17-40
1 S. S. joint ring D 27 x 32 mm to DIN 7603 (made of 1.4301), bright annealed
1 Terminating resistor 120
1 Installation manual
NRG 19-40
1 Level electrode type NRG 19-40
1 S. S. joint ring D 27 x 32 mm to DIN 7603 (made of 1.4301), bright annealed
1 Terminating resistor 120
1 Installation manual
NRG 111-40
1 Level electrode type NRG 111-40
1 S. S. joint ring D 33 x 39 mm to DIN 7603 (made of 1.4301), bright annealed
1 Terminating resistor 120
1 Installation manual
Ω
Ω
Ω
Ω
Description
The level electrode NRG 1...-40 works according to the conductivity measurement principle.
The NRG 1...-40 is designed for use in conductive liquids to detect the minimum liquid level:
■ One level with one switchpoint.
The NRG 1...-40 is used in combination with switching controller NRS 1-40 or NRS 1-40.1 or further
system components. NRG 1...-40 in conjunction with the associated control equipment constitutes a
water level limiter with periodic self-testing routine (SMART function) in accordance with TRD 604,
sheet 1 and 2 and EN regulations. The level data are transferred from the electrode NRG 1...-40 to the
control unit via a CAN bus using the CANopen protocol.
5
6
Explanatory continued
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 the monitored 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. cut-out of the burner circuit or
interruption of the burner-protection circuit.
The system incorporates an additional electrode that provides automatic monitoring of the electrical
resistance path between the measuring electrode and the earth. When the measured value falls below
the admissible resistance value the burner shutdown is endorsed by interruption of the burner
protection circuit.
At regular intervals, the level electrode NRG 1...-40 sends a data telegram to the switching controller
NRS 1-40. The data transfer is effected by means of a CAN bus according to DIN ISO 11898 using the
CANopen protocol.
One switching controller type NRS 1-40 or NRS 1-40.1 can be used for two level electrodes
NRG 1...-40 (low-level limiting system
).
System components
NRS 1-40
Digital switching controller for low-level limiter NRG 1...-40
Functions: Low-level alarm (
min)
Data exchange: CAN bus to DIN ISO 11898 using CANopen protocol.
NRS 1-40.1
Digital control equipment for level electrodes NRG 1...-40 (low water), one level electrode
NRG 1...-41 (high level) and a safety temperature limiter TRG 5-6... / TRV 5-40.
Functions:
min alarm, max alarm, max temperature (freely configurable combinatons)
Data exchange: CAN bus to DIN ISO 11898 using CANopen protocol.
URB 1, URB 2
Control terminal and display unit
Functions: Parameterization and visual display (LCD)
Data exchange: CAN bus to DIN ISO 11898 using CANopen protocol
Design
NRG 16-40, NRG 17-40, NRG 19-40:
Screwed ¾", EN ISO 228-1. Fig. 2
NRG 111-40:
Screwed 1", EN ISO 228-1. Fig. 3
Technical Data
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40
Type Approval Nº
TÜV · SWB / SHWS · 02-403
EG BAF-MUC 02 02 103881 002
Service pressure
NRG 16-40, PN 40 NRG 17-40, PN 63 NRG 19-40, PN 160 NRG 111-40, PN 320
32 bar g (464 psig) 60 bar g (870 psig) 100 barg (1450 psig) 183 bar g (2652 psig)
at 238°C at 275°C at 311 °C at 357°C
Connection
Screwed ¾" BSP, EN ISO 228-1 (NRG 16-40, NRG 17-40, NRG 19-40)
Screwed 1" BSP, EN ISO 228-1 (NRG 111-40)
Materials
Terminal box: Die cast aluminium 3.2161 (G AlSi8Cu3)
Stem: S. S. 1.4571 (X6CrNiMoTi17 12 2)
Measuring electrode: S. S. 1.4401 (X5CrNiMo17 12 2)
Electrode insulation: Gylon
®
(NRG 16-40, NRG 17-40, NRG 19-40)
Electrode insulation: PEEK (NRG 111-40)
Lengths supplied
500 mm, 1000 mm, 1500 mm, 2000 mm, 2500 mm, 3000 mm
Sensitivity of response
> 0.5
µS/cm at 25°C.
Supply voltage
18 – 36 V DC (coming from NRS 1-40 / NRS 1-40.1)
Current consumption
35 mA
Fuse
Electronic thermal fuse T
= 85 °C, hysteresis 2K
max
Hysteresis
-2 K
Electrode voltage
2 V
ss
Data exchange
CAN bus to DIN ISO 11898, CANopen protocol
Indicators and adjustors
One 10-pole code switch for node ID and baud rate settings
One wire link (for switching between electrode 1 and electrode 2)
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
7
8
Technical Data continued
TÜV . SWB / SHWS.
02 - 403
0525
GESTRA AG
Münchener Str. 77
D-28215 Bremen
18-36 V DC0,5 µS/cm>
Betriebsanleitung beachten
See installation instructions
Voir instructions de montage
Tmax = 70 °C (158 °F)
IN/OUT: CAN-Bus
PN 63
PN 160
PN 40
PmaPmax
TmaTmax
NRG 17 - 40
NRG 19 - 40
NRG 16 - 40
G 3 /4 1.4571 IP65
60 bar (876 psi)
275 °C (527 °F)
32 bar (464 psi)
238 °C (460 °F)
100 bar (1450 psi)
311 °C (592 °F)
Node ID: _ _ _ _ __
VS-Nr.: 08 Mat-Nr.: 392084
0525
GB Reg. Design 2 053 113
US Pat. 5 719 342, 5805 052,
Design 383 403
18-36 V DC0,5 µS/cm>
Tmax = 70 °C (133 °F )
IN/OUT: CAN-Bus
PmaxPmax
TmaxTmax
NRG 111 - 40
G 1 1.4529 IP65
180 bar (2611 psi)
357 °C (675 °F)
Node ID: __ __ __
Münchener Str. 77, D-28215 Bremen
SER Nr.:
GESTRA AG
TÜV .
SWB / SHWS . 02 - 403
Betriebsanleitung beachten
See installation instructions
Voir instructions de montage
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
PROD UCT
DESI GNA WARD
MIN
Technical Data continued
Dimensions NRG 16-40, NRG 17-40, NRG 19-40
175
140
b = 70
mm
A.F.
¾" BSP, EN ISO 228-1
337.5
85
≥ 185
500, 1000, 1500,
2000, 2500, 3000
Fig. 2
9
10
PRODU CT
DESIG NA WARD
MIN
Technical Data continued
Bei Defekt ist hier Dampfaustritt möglich!
If defective steam might escape here!
En cas de d éfaut, de la vapeur peut s’échapper ici!
Dimensions NRG 111-40
140
175
b = 70
400136
mm
A.F.
1" BSP, EN ISO 228-1
≥ 185
Fig. 3
500, 1000, 1500,
30
2000, 2500, 3000
Design
NRG 16-40, NRG 17-40, NRG 19-40
P
Fig. 4
A.F.
A
F
G
B
C
E
D
Fig. 5
∅ 33
¾" BSP,
EN ISO 228-1
N 8
N 10
0.5
Fig. 6
Fig. 7
11
12
Design continued
NRG 111-40
P
Fig. 8
F
A.F.
A
G
B
E
C
D
Fig. 9
30
110
14
∅ 40
1" BSP,
EN ISO 228-1
N 8
N 10
0.5
∅ 58
Fig. 10 Fig. 12
Fig. 11
KK
1
2
H
11
22
3
3
1
2 3 56 74
8
9
10
ON
1
2
3
4
5
GESTRA Steam Systems
GESTRA
NRG 1...-40
MAX
MAX 70°C
MAX 95%
%
IP 65
Functional Elements
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40
MAX 70 °C
MAX 95 %
Fig. 13
Fig. 14
I
HIJ
K
L
O
NM
13
14
Design / Functional Elements continued
Key
A Electrode rod
B Bore
C Spring
D Electrode tip
E S. S. joint ring D 27 x 32 mm to DIN 7603 (made of 1.4301), bright annealed (NRG 1...-40)
E S. S. joint ring D 33 x 39 mm to DIN 7603 (made of 1.4301), bright annealed (NRG 111-40)
F Seating surface
G Electrode thread
H Screws M 4
I M 12 sensor connector, 5 poles, A-coded, M 12 sensor jack, 5 poles, A-coded
J Cover
K Wire link (for selecting “Electrode 1” or “Electrode 2”)
L 10-pole code switch for setting node ID and baud rate
M Terminal strip
N PE connection
O Plug
P Thermal insulation (provided on site), d = 20 mm (outside of thermal insulation of steam
generating unit)
Installation
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40, step 1
1. Screw electrode tip
D into measuring electrode A , Fig. 4, Fig. 8.
2. Carefully determine required measuring length of electrode. Observe min. length, Fig. 2, Fig. 3.
3. Mark length of electrode tip
4. Unscrew electrode tip
5. After visual inspection screw electrode tip
electrode tip
D, so that its bent end completely enters into small bore B.
D.
D from measuring electrode A and cut tip.
D into measuring electrode A. Slide spring C along
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40, step 2
1. Check seating surfaces, Fig. 7, Fig. 12
2. Place ring joint E onto seating surface F of electrode, Fig. 5, Fig. 9
®
3. Apply a light smear of silicone grease (e.g. Molykote
4. Screw level electrode into threads of flange provided on vessel and tighten with
111) to electrode thread G.
a 41 mm open-end spanner. The torque required is 160 Nm when cold, for NRG 111-40 475 Nm.
5. When installing two electrodes together in one flange install the first electrode as described in 4.
Before mounting the second electrode undo plug
from the board. Screw in electrode. Slightly tighten plug
O, remove PE connection N and strip cable lugs
O. Install PE connection N and insert
cable lugs.
Attention
■ The seating surfaces of the standpipe or the flange provided on the vessel must be
accurately machined, see Fig. 7, Fig. 12.
■ Do not bend electrode tip when mounting.
■ Use only ring joint (of stainless steel 1.4301) D 27 x 32 (D 33 x 39 for NRG 111-40)
to DIN 7603 supplied with the electrode.
■ Do not lag electrode body above the hexagonal section, Fig. 5, Fig. 9.
■ Do not insulate electrode thread with hemp or PTFE tape.
■ Do not screw electrode directly into a screwed socket, Fig. 6, Fig. 11.
■ Observe min. spacing when installing the electrode, Fig. 10, Fig. 15, Fig. 19.
Note
■ For the approval of the boiler standpipe the relevant regulations must be considered.
■ Refer to pages 16 and 17 for typical installation examples.
Tools
■ Open-end spanner A. F. 17 mm
■ Open-end spanner A. F. 41 mm
Molykote® 111 is a registered trademark of DOW Corning Corp., Midland Michigan, USA
■ Hacksaw
■ Flat file, medium cut
15
16
Installation continued
Examples of installation NRG 16-40, NRG 17-40, NRG 19-40
¾" BSP
1
DN 50
4
2
∅ 20
3
20
"
5
6
8
≥10
≤ 90°
Fig. 15 Fig. 16
∅ 20
¾" BSP
¾" BSP
9
0
1
≥ DN 20
2
≤ 3000
5
7
8
≥10
9
!
≥ DN 20
3
20
DN 100
24.5 24.5
∅ 20
4
≤ 90°
∅ 20
Centre distance
3
¾" BSP
"
1
≥ 20
4
5
≥ 10
9
Fig. 17
Fig. 18
≥ DN 20
Installation continued
Examples of installation NRG 111-40
G ¾
1" BSP
1
DN 50
4
2
∅ 20
3
20
5
6
8
≥10
≤ 90°
∅ 20
Fig. 19
9
0
≥ DN 20
45°
20
max. 1000
Fig. 20
1" BSP
2
≥ DN 20
Fig. 21
Centre distance
≥ DN 20
17
18
Installation continued
Key
1 Flange PN 40 , DN 50, DIN 2527
Flange PN 40, DN 100, DIN 2527
2 For the approval of the boiler standpipe with connecting flange the relevant regulations
must be considered.
3 Vent hole (Provide vent hole as close to the boiler wall as possible)
4 High water (HW)
5 Electrode rod d = 8 mm
6 Protection tube DN 80
7 Protection tube DN 100
8 Electrode distance ≥ 14 mm
9 Low water (LW)
0 Reducer DIN 2616-2, K-88.9 x 3.2 - 42.4 x 2.6 W!
! Reducer DIN 2616-2, K-114.3 x 3.6 - 48.3 x 2.9 W
" Solenoid valve
Wiring
NRG 16-40, NRG 17-40, NRG 19-40, NRG 111-40
Important Note
Note that screened multi-core twisted-pair control cable is required for the BUS line, e. g. UNITRONIC
BUS CAN 2 x 2 x ... mm
2
or RE-2YCYV-fl 2 x 2 x ... mm2.
®
Prefabricated control cables (with connector and coupler) for connecting the equipment are available as
accessories.
The baud rate (data transfer rate) dictates the cable length between the bus nodes and the total power
consumption of the sensor dictates the conductor size.
S 8 S 9 S 10 Baud rate Cable length
OFF ON OFF 250 kBit/s 125 m
Factory setting
ON ON OFF 125 kBit/s 250 m 2 x 2 x 0.5
OFF OFF ON 100 kBit/s 335 m 2 x 2 x 0.75
ON OFF ON 50 kBit/s 500 m
OFF ON ON 20 kBit/s 1000 m
ON ON ON 10 kBit/s 1000 m
Number of pairs
and conductor size [mm2]
2 x 2 x 0.34
on request, dependent on
bus configuration
The baud rate is set via a code switch. Reduce baud if cable is longer than specified in the table. Make
sure that all bus nodes have the same settings.
To protect the switching contacts fuse circuit with 2.5 A (anti-surge fuse) or according to TRD
regulations (1.0 A for 72 hrs operation).
If a max. cable length of more than 125 m (up to 1000 m) is desired, make sure to modify the
baud rate settings accordingly. Please refer to Fig. 26 on page 24 for more details.
Aligning terminal box
1. Undo screws H and remove housing cover J. Fig. 13
2. Slacken plug O with 17 mm open-end spanner but do not remove. Fig. 14
The electrode terminal box can now be turned through +/– 180°.
3. Turn electrode terminal box into desired position (+/–180°).
4. Tighten plug
O with 25 Nm.
5. Set node ID (see sections “Basic Settings” and “Factory set default node IDs”).
6. Re-attach housing cover J and fix it by using screws H.
Note
■ Wire the control cable according to the wiring diagram with connector and coupling.
UNITRONIC® is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart
19
20
NRG 1...-40
_
1
2
3
4
5
C
L
S
C
H
+
C
L
H
C
Ω
24V DC
CAN - Bus
S
11
22
3
3
1
2 3 5 6 74
8
9
10
ON
Wiring continued
5 5 5 555
+
-
LCH
C
S
Wiring diagram
Compensating electrode
Compensating electrode
Electrode rod
Terminating resistor 120 Ω,
twisted pair cable.
3
2 1 5 46 3 4 1 5 2
Wire link Code switch
e. g. UNITRONIC® BUS CAN 2 x 2 x...
e. g. UNITRONIC® BUS CAN 2 x 2 x...
1 Screen
2 Voltage supply 24V DC+
3 Voltage supply 24V DC-
4 CAN Data line C
5 CAN Data line C
H
L
6 Terminating resistor 120 Ω
2
2
Controller
NRS ...
LRR ...
TRS ...
Operating
device URB 2
Coupler with terminating
resistor 120
Fig. 22
UNITRONIC® is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart
Ω
CEP
Central
earthing
point
Level electrode
Conductivity electrode
NRG ...
LRG ...
Temperature transmitter
TRV ...
Connector with terminating
resistor 120
Ω
Wiring continued
Attention
■ Wire equipment in series. Star-type wiring is not permitted!
■ Interlink screens of control cables such that electrical continuity is ensured and
connect them
■ In a CAN bus network the first and last equipment must be provided with a
terminating resistor of 120
■ The CAN bus network must not be interrupted while operating.
An interruption will result in high/low level alarm!
Tools
■ Screwdriver for cross head screws, size 1
■ Screwdriver for slotted screws, size 2.5, completely insulated according to VDE 0680
■ Open-end spanner 17 mm A. F.
once to the central earthing point (CEP).
Ω. Fig. 22.
21
22
Basic Settings
CAN bus
All level and conductivity controllers and associated electrodes are interconnected by means of a CAN
bus adopting the CANopen protocol. Every item of equipment features an electronic address (Node ID).
The four-core bus cable serves as power supply and data highway for high-speed data exchange.
The CAN address (Node ID) can be set between
The equipment is configured at our works and ready for service with other GESTRA system
components without having to set the node ID.
If several systems of the same kind are to communicate in one CAN bus network, be sure to
assign one node ID for each individual system component (e. g. controller). Refer to the
following pages for more details.
Node-ID
NRS 1-40 NRG 16-40(1) NRG 16-40(2) Reserved Reserved
X X + 1 X + 2 X + 3 X + 4
1 2 3* Factory setting
Reserved area
1 and 123.
NRS 1-40.1 NRG 16-40(1) NRG 16-40(2) 3
X X + 1 X + 2 X + 3 X + 4
1 2 3* Factory setting
Reserved area
rd
Limiter 4th Limiter
Attention
The node IDs of the respective devices must be set manually.
Refer to the installation & operating manual of the equipment in question.
Factory set default values
The level electrode features the following factory set default values:
■ Baud rate: 250 kB/s
■ Sensitivity: 0.5 µS/cm
■Node ID: 002
■Configuration: Level electrode 1, wire link K set left.
Basic Settings continued
1
2
H
11
22
3
3
1
2 3 5 6 74
8
9
10
ON
1
2
3
4
5
NRS 1-40 ID: 001
NRS 1-40.1 ID: 001
NRS 1-41 ID: 006
NRS 1-42 ID: 020
NRS 2-40 ID: 039
NRR 2-40 ID: 040
LRR 1-40 ID: 050
NRG 16-40 ID: 002
NRG 16-40 ID: 003
NRG 16-41.1 ID: 004
TRV 5-40 ID: 005
NRG 16-41 ID: 007
NRG 16-42 ID: 021
NRG 26-40 ID: 041
LRG 16-40 ID: 051
Water-level limiting system
The water-level limiting system consists of one switching controller type NRS 1-40 and
electrodes type NRG 1...-40. Before starting the system make sure to configure
electrodes as level electrode 2
.
two level
one of the two level
■ Set wire link K on circuit board to the right (electrode 2), Fig. 14
■ Set code switch L according to the table "Node ID"
(example:
003*). For more information see Fig. 24 and 25 on page 24.
Factory set default node IDs
Switching Controller Level Electrode
Assigning / changing node ID
If several systems of the same kind are to communicate in one CAN bus network, be sure to assign
one node ID for each individual system component (e. g. controller).
1. Undo screws
2. Change code switch
3. Re-attach housing cover
H and remove housing cover J.
L settings as required. For more information refer to page 24.
J and fix it with screws H.
Fig. 23
Attention
■ Do not assign the same node ID twice within the CAN bus network.
K
L
23
24
1
2 3 5 6 74
8
9
10
ON
1
2 3 5 6 74
8
9
10
ON
Basic Settings continued
Setting code switch
L L
▲
S1
OFF
OFFS3
OFFS4
OFFS5
OFFS6
OFFS7
Fig. 24 (Factory setting)
S8
OFF
ON
OFF
ON
OFF
OFF
Node ID
ONS2
S9 S0
OFFON
OFF
ON
ON
ON
1
2
4
8
16
32
64
Baud rate
250 kBit/s
125 kBit/s
100 kBit/s
50 kBit/s
ON 20 kBit/sONOFF 1000 m
ON 50 kBit/sONON 1000 m
Fig. 26 (Factory setting 250 kBit/s)
2
▲
S1
OFFS3
OFFS4
OFFS5
OFFS6
OFFS7
Fig. 25 (Level electrode 2)
ON
ONS2
Node ID
1
2
4
8
16
32
64
3
Cable length
125 m
250 m
335 m
500 m
Commissioning
Wiring check
Make sure that the level electrode NRG 1..-40 is properly connected to the switching controller NRS
1-40 or NRS 1-40.1 according to the wiring diagram, Fig. 22
Apply mains voltage
Apply power to switching controller NRS 1-40 or NRS 1-40.1.
Operation
Water-level limiter, water-level limiting system
Use in combination with switching controller NRS 1-40 or NRS 1-40.1 in pressurized hot-water plants
and steam boilers working in accordance with TRD 401, TRD 602, TRD 604, EN 12952, EN 12953 or
other national regulations.
Note
■
To analyse and eliminate malfunctions use “Fault finding list for troubleshooting” on
page 26!
Emergency Operation
Emergency operation of water-level limiting system
If one level electrode fails to operate the installation can continue to operate in emergency mode under
constant supervision according to TRD 401 with
1. Undo screws H and remove housing cover J, Fig. 13
2. Set wire link K of the working electrode to the left (electrode 1), Fig. 14
3. Set node ID of the working electrode to “002”, Fig. 14, Fig. 24
4. Attach housing cover J and tighten screws H.
Attention
■
Enter beginning of emergency operation in the boiler log.
■
An installation operating in emergency mode has to be constantly supervised.
■
Immediately replace faulty level electrode.
■
Enter end of emergency operation in the boiler log.
one level electrode.
25
26
Malfunctions
Fault finding list for troubleshooting
Equipment fails to work – Indication of a malfunction
Fault: In spite of correct wiring and commissioning of the equipment an interference signal is
Remedy: The interference signal is caused by H. F. interferences coming from the installation.
Level electrode submerged – Low-level alarm
Fault: Mains voltage not applied.
Remedy: Apply mains voltage. Connect electrode according to wiring diagram.
Fault: Thermal fuse has been triggered.
Remedy: The ambient temperature must not exceed 70°C.
Fault: The electrode housing does not have earth connection to the boiler.
Remedy: Clean seating surfaces and insert metal joint ring
(of stainless steel 1.4301) D 27 x 32 to DIN 7603.
Do
Fault: No data exchange with CAN bus.
Remedy: Check switching controller NRS 1-40. Connect level electrode according to
wiring diagram.
Fault: The internal insulation of the electrode rod is damaged.
Remedy: Replace level electrode.
indicated.
For interference suppression of the voltage supply we supply ferrite rings, stock code
147253. The 230 V supply lines should be looped through the ferrite ring five to ten
times. If several controllers are used in the system, they can be fed from the interference
suppressed supply lines. For the interference suppression of the bus line we supply
hinged-shell ferrite rings, stock code 147254. The hinged-shell ferrite rings are clamped
onto the bus line close to the terminal strip of the controller.
not insulate level electrode with hemp or PTFE tape.
Level below “Low water level” – no function
Fault: The electrode rods have earth contact.
Remedy: Change installation position.
Fault: The vent hole in the protection tube does not exist, is obstructed or flooded.
Remedy: Check protection tube and, if necessary, provide vent hole.
Fault:
Remedy: Open isolating valves.
If faults occur that are not listed above or cannot be corrected, please contact our service centre or
authorized agency in your country.
The isolating valves of the external measuring pot (optional item) are closed.
Decommissioning
Danger
Risk of severe burns and scalds to the whole body!
Before removing the level electrode make sure that the vessel and the measuring pot are
depressurised (O bar) and cooled down to room temperature (20 °C).
Disposal
Remove the level electrode and separate the waste materials in accordance with the material
specification.
Electronic components (boards) must be disposed of separately.
For the disposal of the level electrode observe the pertinent legal regulations concerning waste
disposal.
Annex
Declaration of conformity
We hereby declare that the equipment NRG 16-40, NRG 17-40, NRG 19-40 and NRG 111-40
conform to the following European guidelines:
■
LV guideline 73/23/eec version 93/68/eec
■
EMC guideline 89/336/eec version 93/68/eec
■ ATEX Directive 94/9/EC of 23 March 1994
■ Pressure Equipment Directive PED 97/23/EC of 29
excluded from the scope of this directive according to section 3.3)
Applied conformity assessment procedure: Annex III, Module B and D, verified by the notified body
0525
.
This declaration is no longer valid if modifications are made to the equipment without consultation
with us.
Bremen, 3rd January 2005
th
May 1997 (provided that the equipment is not
GESTRA AG
Dipl.-Ing. Uwe Bledschun
(Academically qualified engineer)
Head of the Design Dept.
Dipl.-Ing. Lars Bohl
(Academically qualified engineer)
Quality Assurance Manager
27
Agencies all over the world:
www.gestra.de
GESTRA
España
GESTRA ESPAÑOLA S.A.
Luis Cabrera, 86-88
E-28002 Madrid
Tel. 00 34 91 / 5 15 20 32
Fax 00 34 91 / 4 13 67 47; 5 15 20 36
E-mail: aromero@flowserve.com
Great Britain
Flowserve Flow Control (UK) Ltd.
Burrel Road, Haywards Heath
West Sussex RH 16 1TL
Tel. 00 44 14 44 / 31 44 00
Fax 00 44 14 44 / 31 45 57
E-mail: gestraukinfo@flowserve.com
Italia
Flowserve S.p.A.
Flow Control Division
Via Prealpi, 30
l-20032 Cormano (MI)
Tel. 00 39 02 / 66 32 51
Fax 00 39 02 / 66 32 55 60
E-mail: infoitaly@flowserve.com
Polska
GESTRA POLONIA Spolka z.o.o.
Ul. Schuberta 104
PL - 80-172 Gdansk
Tel. 00 48 58 / 3 06 10 -02 od 10
Fax 00 48 58 / 3 06 33 00
E-mail: gestra@gestra.pl
Portugal
Flowserve Portuguesa, Lda.
Av. Dr. Antunes Guimarães, 1159
Porto 4100-082
Tel. 0 03 51 22 / 6 19 87 70
Fax 0 03 51 22 / 6 10 75 75
E-mail: jtavares@flowserve.com
USA
Flowserve GESTRA U.S.
2341 Ampere Drive
Louisville, KY 40299
Tel.: 00 15 02 / 502 267 2205
Fax: 00 15 02 / 502 266 5397
E-mail: dgoodwin@flowserve.com
GESTRA AG
P. O. Box 10 54 60, D-28054 Bremen
Münchener Str. 77, D-28215 Bremen
Telephone +49 (0) 421 35 03- 0
Fax +49 (0) 421 35 03 -393
E-Mail gestra.ag@flowserve.com
Internet www.gestra.de
810590-03/206cm · © 2000 GESTRA AG · Bremen · Printed in Germany
28
Loading...