Related Manuals for GESTRA NRG 26-40
Summary of Contents for GESTRA NRG 26-40
- Page 1 Level electrode NRG 26-40 Original Installation Instructions 810274-05 E n g l i s h...
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Page 2: Table Of Contents
Note on the Declaration of Conformity / Manufacturer's Declaration ..........6 Technical Data NRG 26-40 ............................7 Technical Data Name plate/marking ..........................8 Scope of supply ............................8 Installation Dimensions NRG 26-40 .........................10 NRG 26-40 ............................11 Key ...............................11 Tools ..............................11 Examples of installation NRG 26-40 ............................12 Key ...............................13... - Page 3 Setting the attenuation of the level signal ....................23 Troubleshooting Indication, diagnosis and remedy ......................24 Further Notes Action against high frequency interference ....................25 Maintenance Safety note ............................26 Cleaning the electrode rod ........................26 Removing and disposing of the level electrode Removing and disposing of level electrode NRG 26-40 ................26...
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Page 4: Important Notes
Important notes Usage for the intended purpose The level electrode NRG 26-40 is used for continuous level monitoring in steam boilers and (pressur- ized) hot-water installations or in condensate and feedwater tanks. In conjunction with the level switch NRS 2-40 and the level controller NRR 2-40 the electrode can be used for instance as water level controller with MIN/MAX alarm. -
Page 5: System Components
System components NRS 2-40 Digital switching controller for level electrode NRG 26-40. Functions: Four liquid levels with one switchpoint each, MAX alarm, MIN alarm, pump ON, pump OFF with one switchpoint each, liquid level continuously within the predefined control band of the electrode. -
Page 6: Directives And Standards
Directives and Standards VdTÜV Bulletin "Wasserüberwachung 100" (= Water Monitoring 100) The level electrode NRG 26-40 in conjunction with the following control equipment is type approved according to VdTÜV Bulletin "Wasserstand 100": NRS 2-40 and NRR 2-40. The VdTÜV Bulletin "Wasserstand (=Water Level) 100" specifies the requirements made on water level control and limiting equipment for boilers. -
Page 7: Technical Data
Technical Data NRG 26-40 Service pressure PN 40, 32 bar at 238°C Mechanical connection NRGT 26-1: Screwed G A, ISO 228 ¾ Materials of construction Screw-in body: 1.4571, X6CrNiMoTi17-12-2 Electrode rod insulation: PTFE Terminal box: 3.2161 G AlSi8Cu3 Length of installation... -
Page 8: Technical Data
TÜV · WR · XX - 399 Disposal note GESTRA AG Manufacturer Münchener Str. 77 D-28215 Bremen Fig. 1 Scope of supply NRG 26-40 1 Level electrode type NRG 26-40 1 Joint ring 27 x 32, form D, DIN 7603, 1.4301, bright annealed 1 Installation manual... -
Page 9: Installation
Installation Note The level electrode NRG 26-40 can be installed together with one GESTRA level elec- trode for water level limiting or for high-level alarm in a single protection tube or exter- nal level pot (inside diameter 100 m). Fig. 5 - 8. If the level limiting electrode is installed inside the vessel, it must be at least 40 mm away from the upper vent hole. -
Page 10: Dimensions Nrg 26-40
Installation - continued - Dimensions NRG 26-40 NRG 26-40 GESTRA Steam Systems 373 300 477 400 583 500 GESTRA 688 600 794 700 b = 68 899 800 1004 900 1110 1000 1214 1100 1319 1200 1423 1300 1528 1400... -
Page 11: Nrg 26-40
Installation - continued - NRG 26-40 1. Check seating surfaces. Fig. 3 2. Place supplied joint ring 3 onto seating surface of the threaded standpipe or flange. Fig. 3 3. Apply a light smear of heat resistant silicone grease (e. g. WINIX ®... -
Page 12: Examples Of Installation
Examples of installation NRG 26-40 G 3/4 G 3/4 DN 50 DN 50 ≤ 90° ≤ 90° ∅ 20 ∅ 20 Fig. 5 Fig. 4 Protection tube (provided on site) for Protection tube (provided on site) for installation installation inside the boiler... -
Page 13: Key
Examples of installation NRG 26-40 - continued - Tube e. g.. 33.7 x 3.2 Fig. 8 Inclined installation, e. g. in steam boilers Flange PN 40, DN 50, DIN EN 1092-01 (single electrode) Flange PN 40, DN 100, DIN EN 1092-01 (combination of electrodes) For the approval of the boiler standpipe with connecting flange the relevant regulations must be considered. -
Page 14: Electrical Connection
Electrical connection NRG 26-40 GESTRA Steam Systems GESTRA 2 3 4 5 6 7 8 9 0 Fig. 9 Fig. 10 Cover screws (cross recess head screws M4) Green LED for CAN bus communication Body cover Red LED for bus malfunction... -
Page 15: Connection Of Level Electrode
Connection of level electrode The level electrode NRG 26-40 is equipped with a M 12 sensor connector and a M 12 sensor jack, both A-coded and with 5 poles. For connecting the electrode and wiring the CAN bus devices control cable assemblies (with plug and socket) of various lengths are available as add-on equipment. -
Page 16: Wiring Diagram And Pin Assignments Of Connector / Jack
Electrical connection - continued - Wiring diagram and pin assignments of connector / jack NRG 26-40 Ω Fig. 11 120 Ω 120 Ω Fig. 12 Fig. 13 Fig. 14 RES 1 RES 2 CAN bus line, twisted pair control cable Pin 2: Supply voltage 24 V DC+ (red) Terminating resistor 120 Ω, RES 1 or RES 2... -
Page 17: Can Bus Wiring Diagram
The max. baud rates and cable lengths indicated above are based on empirical values obtained by GESTRA. In certain cases it may be necessary to reduce the baud rate in order to ensure operational safety. The type of wiring has a strong influence on the electromagnetic compatibility (EMC) ... -
Page 18: Can Bus Voltage Supply
If a safety power supply unit (e. g. SITOP smart, 24 V, 2.5 A) is used for the voltage supply of the CAN bus do not tap the supply voltage from the terminals 1 and 5 of the GESTRA control devices. -
Page 19: Node Id
NRG 16-42 X – 1 X + 1 Factory setting Modulating level control URZ 40 NRS 2-40 NRR 2-40 NRG 26-40 Reserved X – 2 X – 1 X + 1 X + 2 Factory setting Automatic continous blowdown control... -
Page 20: Factory Setting
Basic settings - continued - Factory setting The level electrode features the following factory set default values: Baud rate: 250 kB/s Attenuation of the measuring signal: 19 sec. Node ID: 041 Establishing / changing node ID If several identical systems are to communicate in a CAN bus network, set a different node ID for each system (e. -
Page 21: Code Switch Settings
Basic settings - continued - Code switch settings 2 3 4 5 6 7 8 9 0 2 3 4 5 6 7 8 9 0 Node ID Node ID Fig. 16 (Factory setting) Fig. 17 (Example 1) Baud rate Cable length 250 kBit/s 125 m... -
Page 22: Commissioning Procedure
Commissioning procedure Applying supply voltage Check that the level electrode NRG 26-40 is connected to the associated control unit NRS 2-40 or the level controller NRR 2-40 according to the wiring diagram. Fig. 11, 12 + 15 Apply supply voltage to the control unit NRS 2-40 or the level controller NRR 2-40. -
Page 23: Operation
6. Unplug the CAN bus connector. Set the original node ID and baud rate. Plug in the CAN bus connector. The level electrode NRG 26-40 works now with the new attenuation setting. 7. Put housing cover a in place and fix it with screws =. -
Page 24: Troubleshooting
Troubleshooting Indication, diagnosis and remedy Attention Before carrying out the fault diagnosis please check: Supply voltage: Is the level electrode supplied with the voltage specified on the name plate? Wiring: Is the wiring in accordance with the wiring diagram? Indication of malfunctions Equipment does not work accurately Error Remedy... -
Page 25: Further Notes
Troubleshooting - continued - Indication, diagnosis and remedy - continued - Equipment fails to work Error Remedy Power failure. Switch on supply voltage. Check all electrical connections. The thermal fuse has been triggered. LEDs 1 - 4 of Check ambient temperature, make sure that it does not the control units NRS 2-40 and NRR 2-40 are flashing exceed 70°... -
Page 26: Maintenance
Clean the electrode rod with a wet cloth. Removing and disposing of the level electrode Removing and disposing of level electrode NRG 26-40 1. Switch off supply voltage. 2. Detach sensor connector and sensor jack b and plug them together. - Page 27 For your Notes...
- Page 28 Agencies all over the world: www.gestra.de GESTRA AG Münchener Straße 77 28215 Bremen Germany Telefon +49 421 3503-0 Telefax +49 421 3503-393 E-mail info@de.gestra.com www.gestra.de 810274-05/06-17cm (808457-08) · GESTRA AG · Bremen · Printed in Germany...
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