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NRS 1- 8

Installation Instructions 818612-03

Level Switch NRS 1-8

GESTRA Steam Systems

EN

English

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Содержание NRS 1-8

Страница 1: ...1 NRS 1 8 Installation Instructions 818612 03 Level Switch NRS 1 8 GESTRA Steam Systems EN English ...

Страница 2: ...n 4 Function 5 System components 5 Design 5 NRS 1 8 12 Attention 12 Tools 12 Key 12 Examples of installation 13 Installation Electrical Connection NRS 1 8 14 Voltage table 14 Attention 14 Notice 14 Tools 14 Wiring diagram 15 NRS 1 8 6 Corrosion resistance 7 Name plate marking 7 Dimensions 8 Technical Data NRS 1 8 9 Key 11 Component Parts NRS 1 8 10 Key 11 Functional Elements ...

Страница 3: ...Contents continued Commissioning Page Water level limiter 17 Notice 17 Operation Fault finding list for troubleshooting 17 18 Operational Malfunctions Danger 18 Disposal 18 Decommissioning Water level limiter 16 Performance Test Declaration of Conformity 19 Annex ...

Страница 4: ... level alarm with periodic self checking routine designed for use in conjunction with level electrodes NRG 16 12 PN 40 NRG 17 12 PN 63 NRG 19 12 PN 160 The equipment combination detects the MAX water level high level limiter Application in steam and pressurised hot water plants in accordance with TRD 602 sheet 1 and sheet 2 as well as EN 12952 and 12953 ATEX Atmosphère Explosible The equipment con...

Страница 5: ...peration correct water level in boiler n Alarm level in boiler too high n Alarm malfunction in level switch or level electrode A green LED indicates power supply Two red LEDs signal an alarm in the event of high water level or system malfunction The failure of one channel loss of redundancy is signalled by one red LED The equipment combination of electrode NRG 16 12 NRG 17 12 or NRG 19 12 and leve...

Страница 6: ...el electrode without measuring surface extension and cell constant 0 3 0 5 µS cm at 25 C when used in conjunction with level electrode with measuring surface extension and cell constant 0 13 see data sheet NRG 16 12 Indicators and adjustors Two LEDs for Alarm one LED for Power one button TEST 1 one toggle switch TEST 2 INSPECTION Mains voltage 230 V 10 50 60 Hz please state voltage when ordering S...

Страница 7: ...the equipment is used for the intended purpose its safety is not impaired by corrosion Technical Data continued Name plate marking Equipment designation Fig 1 Mains voltage Sensitivity of response Delay of response External fuse ...

Страница 8: ...8 Technical Data continued Dimensions Fig 2 106 7 32 51 Fig 3 112 85 ...

Страница 9: ...9 Component Parts 7 2 3 6 5 4 Fig 4 Fig 5 Fig 6 1 NRS 1 8 1 ...

Страница 10: ...10 Fig 7 b 9 0 a MAX 55 C MAX 95 IP 65 Functional Elements NRS 1 8 ...

Страница 11: ...try flexible 6 Cable entry housing 7 Fixing hole d 4 3 mm 9 Toggle switch TEST 2 INSPECTION for internal self checking 0 Red LED High level alarm a Button TEST 1 for simulating a high level alarm b Green LED Power indicating power supply Component Parts Functional Elements Key ...

Страница 12: ... base 2 3 Select cable entry 5 and remove corresponding seal On mounting panel 1 Loosen cover screws 1 and detach cover 3 from base 2 2 Unscrew mounting clip 4 3 Drill hole 7 marked in the base to 4 3 mm 4 Select cable entry 5 6 and remove corresponding seal 5 Fix base with two M4 screws onto mounting panel 1 Cover screws 2 Base 3 Upper part of housing 4 Mounting clip 5 Cable entry flexible 6 Cabl...

Страница 13: ...13 Installation continued Fig 8 4 2 5 8 6 6 3 1 Fig 9 7 7 MAX 55 C MAX 95 IP 65 Examples of installation ...

Страница 14: ...iring diagram for NRS 1 8 Fig 10 Fig 11 Attention n To protect the switching contacts provide circuit with a 2 5A slow blow fuse or according to TRD regulations 1 0 A for 72 h operation n The screen must not make any other electrical contact Notice n The self checking routine of the level switch NRS 1 8 reduces U1 2 all 40 seconds to zero volt n Connect screen only to terminal 8 of the level switc...

Страница 15: ...15 Electrical Connection continued Wiring diagram Fig 10 Fig 11 This wiring diagram is only applicable for France Safety circuit Safety circuit L N L N ...

Страница 16: ... the automatic self testing routine is activated at this point in time an alarm will only be raised after twice the response delay time has elapsed 5 To simulate a high level alarm when the electrode tip is exposed press button TEST 1 a Press and hold down the button until the response delay has elapsed Both red LEDs 0 must then light up 6 To test the self checking circuitry of the level switch pr...

Страница 17: ...ndancy in the level switch i e failure of one or two of the channels Replace level switch High water level reached no function Fault The water level exceeds the high level mark but neither of the two red LEDs 0 lights up Remedy Check whether the protection tube is provided with a vent hole If the electrode is fitted in a measuring pot outside the boiler check positions of isolating valves Measure ...

Страница 18: ...observe the pertinent legal regulations concerning waste disposal Danger The terminal strips of the NRS 1 8 are live during operation This presents the danger of electric shock Cut off power supply before mounting or removing the terminal strips and the housing cover Operational Malfunctions continued If faults occur that are not listed above or cannot be corrected please contact our service centr...

Страница 19: ...irective 89 336 eec version 93 68 eec n Low Voltage Standard EN 50178 n EMC Standard EN 50081 2 EN 50082 2 This declaration is no longer valid if modifications are made to the equipment without consultation with us Quality Assurance Manager Lars Bohl Academically qualified engineer Head of the Design Dept Uwe Bledschun Academically qualified engineer Bremen 03rd January 2005 GESTRA AG ...

Страница 20: ...3967 08 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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