GESTRA NRG 16-12 Installation Instructions Manual Download Page 3 | Manualshive

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Contents

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Electrical Connection

NRG 6-2, NRG 7-2, NRG 9-2 .....................................................................................................9

Optional for NRG 6-2, NRG 7-2, NRG 9-2 ..................................................................................9

Wiring diagram .....................................................................................................................................20

Voltage table .........................................................................................................................................2

Note .....................................................................................................................................................2

Tools .....................................................................................................................................................2

Checking electrical connection .............................................................................................................2

Applying mains voltage .........................................................................................................................2

Commissioning

Page

Danger .................................................................................................................................................23

Disposal................................................................................................................................................23

Decommissioning

High-level alarm ...................................................................................................................................22

Note .....................................................................................................................................................22

Operation

Fault-finding list for troubleshooting ......................................................................................................22

Operational Malfunctions

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Summary of Contents for NRG 16-12

Page 1: ... NRG 16 12 NRG 17 12 NRG 19 12 Installation Instructions 818626 02 Level Electrode NRG 16 12 NRG 17 12 NRG 19 12 GESTRA Steam Systems EN English ...

Page 2: ...6 12 NRG 17 12 NRG 19 12 step 2 15 Attention 15 Important notes 16 Tools 16 Installation NRG 16 12 NRG 17 12 NRG 19 12 7 Corrosion resistance 8 Sizing 8 Name plate marking 8 Dimensions NRG 16 12 NRG 17 12 9 Dimensions NRG 19 12 10 Technical Data NRG 16 12 NRG 17 12 NRG 19 12 11 Key 14 Design NRG 16 12 NRG 17 12 NRG 19 12 12 Optional for NRG 16 12 NRG 17 12 NRG 19 12 13 Key 14 Functional Elements N...

Page 3: ...2 NRG 17 12 NRG 19 12 19 Wiring diagram 20 Voltage table 21 Note 21 Tools 21 Checking electrical connection 21 Applying mains voltage 21 Commissioning Page Danger 23 Disposal 23 Decommissioning High level alarm 22 Note 22 Operation Fault finding list for troubleshooting 22 Operational Malfunctions ...

Page 4: ...reas Safety note The equipment must only be installed 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 ATEX Atmosphère Explosible The equipment constitutes a simple item of electrical equipment as defined in DIN EN 50020 section 5 4 According to ...

Page 5: ...sk with set screw measuring surface extension optional 1 Retaining ring optional 1 Installation manual Description The level electrode NRG 1 12 detects the max liquid level high level alarm in a steam boiler The operation of the electrode is based on the conductivity measuring principle using the electrical conductivity of water for signaling one liquid level n High level alarm MAX alarm The NRG 1...

Page 6: ...e operation the level electrode tip is not immersed in boiler water and no high level alarm is given A high level alarm will only be raised if the electrode tip is submerged for more than 3 seconds A high level alarm will also be activated if the insulating seals placed between the electrodes and the body are no longer pressure tight allowing water to penetrate into the body However in this instan...

Page 7: ...PEEK Four pole connector Polyamide PA Terminal box 3 2161 G AlSi8Cu3 optional Lengths available 500 mm 1000 mm 1500 mm Cell constant C 0 13 cm 1 with measuring surface extension 0 3 cm 1 without measuring surface extension Response sensitivity 10 µS cm at 25 C cell constant 0 3 cm 1 0 5 µS cm at 25 C cell constant 0 13 cm 1 Electrical connection Four pole connector cable gland M 16 Terminal box ma...

Page 8: ... continued Sizing The body must not be subjected to pulsating stress Welds and flanges of the electrode are designed to withstand dynamic loading bending and alternating stress The dimensional allowances for anti cor rosive additives reflect the latest state of the technical art Name plate marking Equipment designation Fig 1 Fig 2 Fig 3 ...

Page 9: ...nical Data continued Dimensions NRG 16 12 NRG 17 12 Fig 4 NRG 16 12 with measuring surface extension Fig 5 NRG 17 12 without measuring surface extension 8 165 85 1500 23 30 272 85 1500 30 ISO 228 1 ISO 228 1 ...

Page 10: ...10 Technical Data continued Dimensions NRG 19 12 Fig 6 NRG 19 12 without measuring surface extension 283 120 1500 30 ISO 228 1 ...

Page 11: ...11 Design NRG 16 12 NRG 17 12 NRG 19 12 Fig 9 Fig 10 Fig 7 Fig 8 N8 N 10 0 5 ISO 228 1 33 9 8 0 a 1 2 3 4 5 7 6 ...

Page 12: ...12 Functional Elements NRG 16 12 NRG 17 12 NRG 19 12 Fig 11 i h f e b c d g ...

Page 13: ...13 Functional Elements continued Optional for NRG 16 12 NRG 17 12 NRG 19 12 Fig 13 Fig 12 j k l k m n o ...

Page 14: ...0 Electrode thread Thermal insulation provided on site d 20 mm outside of thermal insulation of steam generating unit Screw M 4 Cover Upper part of terminal box Connecting plate Sealing element Contact plate for level electrode Cable clamp Cable gland M 16 PG 9 Housing screws M 4 a Cable entry M 20 x 1 5 b Housing cover c Nut d PE connection e Terminal strip Design Functional Elements continued Ke...

Page 15: ...suring length taking minimum length into account 3 Mark length of electrode tip 4 4 Unscrew electrode tip 4 from measuring electrode 1 and cut tip 5 Screw electrode tip 4 into measuring electrode 1 and tighten Slide spring 3 along electrode tip 4 so that its bent end completely enters into small bore 2 6 If a measuring surface extension is required slip disk 6 onto electrode tip 5 ensuring that th...

Page 16: ...t exceed 45 and that the length of the electrode rod is limited to 1000 mm Fig 15 n If the electrode is installed outdoor it must be provided with a weather proof cover supplied by GESTRA Alternatively the electrode can be provided with a terminal box made from aluminium Tools n Open end spanner A F 13 DIN 3110 ISO 3318 n Open end spanner A F 36 DIN 3110 ISO 3318 n Scriber n Hacksaw n Flat file cu...

Page 17: ...tion NRG 16 12 NRG 17 12 NRG 19 12 DN100 Fig 16 20 20 DN 20 24 5 24 5 20 20 Fig 14 Fig 17 DN 50 20 3000 20 90 20 90 Centre distance Fig 15 1 4 DN 20 DN 20 p q r s t m a x 1 0 0 0 2 0 45 p q t s r p s t 10 s w u x y x y v w x ...

Page 18: ... the approval of the boiler standpipe the relevant regulations must be considered r Vent hole Provide bore as close as possible to the boiler wall s High water HW t Electrode rod d 8 mm u Protection tube DN 80 DN 100 according to French regulations v Protection tube DN 100 w Electrode distance 14 mm creepage distances and clearances x Low water LW y Reducer DIN 2616 2 K 88 9 x 3 2 42 4 x 2 6 W ...

Page 19: ...ting plate into the upper part of the terminal box and align the cable 8 Hold cable with cable clamp and cable gland in position 9 Mount lid and insert screw 10 Put upper part of the terminal box onto the level electrode and fix it firmly with screw Optional for NRG 16 12 NRG 17 12 NRG 19 12 Wiring via terminal box made from aluminium Screened four core cable e g I Y St Y 2 x 2 x 0 8 or LIYCY 4 x ...

Page 20: ...20 Electrical Connection continued Wiring diagram Fig 18 Fig 20 This wiring diagram is only valid for France Fig 19 L N Safety chain L N Safety chain ...

Page 21: ...screws size 1 n Screwdriver for slotted screws size 2 5 completely insulated according to DIN VDE 0680 1 n Open end spanner A F 18 19 Voltage table Use this voltage table as a reference when checking whether the level electrode is submerged or if there is a malfunction Please take the wiring diagram of the electrode NRS 1 8 into account Fig 18 Fig 20 Note n The self checking routine of the amplifi...

Page 22: ...ns voltage Wire electrode according to wiring diagram Fault 033 The electrode rods have earth contact Remedy Check and change position of installation High level reached no function Fault 019 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 020 The isolating valves of the external measuring pot are cl...

Page 23: ...onents boards must be disposed of separately For the disposal of the level electrode observe the pertinent legal regulations concerning waste disposal Danger Risk of severe burns and scalds to the whole body Before removing the level electrode make sure that the vessel or measuring pot are depressurised 0 bar and cooled down to room temperature 20 C ...

Page 24: ...003 GESTRA AG Bremen Printed in Germany 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 Web www gestra de ...

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