GESTRA Steam Systems
NRGS 15-1
Installation Instructions 818479-00
Level Switch NRGS 15-1
Contents |
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Page |
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Important notes |
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Usage for the intended purpose…………………………………………………………………………… |
8 |
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Safety note……………………………………………………………………………………………………….. |
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Danger …………………………………………………………………………………………………………….. |
8 |
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Explanatory Notes |
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Scope of supply ………………………………………………………………………………………………… |
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Function …………………………………………………………………………………………………………… |
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Technical data…………………………………………………………………………………………………. |
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Corrosion resistance ………………………………………………………………………………………… |
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Establishing Functions |
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Select function ………………………………………………………………………………………………… |
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Factory setting ………………………………………………………………………………………………… |
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Cutting electrode tips to length ………………………………………………………………………….. |
14 |
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Adjust function ………………………………………………………………………………………………… |
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Set sensitivity range…………………………………………………………………………………………. |
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Tools ……………………………………………………………………………………………………………… |
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Installation |
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Level switch NRGS 15-1…………………………………………………………………………………… |
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Align terminal box ……………………………………………………………………………………………. |
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Remove terminal box ……………………………………………………………………………………….. |
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Mount terminal box ………………………………………………………………………………………….. |
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Tools ……………………………………………………………………………………………………………… |
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Wiring |
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Connect level switch NRGS 15-1……………………………………………………………………….. |
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Tools ……………………………………………………………………………………………………………… |
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Wiring diagram………………………………………………………………………………………………… |
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Commissioning |
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Check wiring …………………………………………………………………………………………………… |
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Apply mains voltage…………………………………………………………………………………………. |
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Check switching functions…………………………………………………………………………………. |
22 |
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Malfunctions / Troubleshooting |
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Fault finding list ……………………………………………………………………………………………….. |
24 |
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Replace electronic circuit board…………………………………………………………………………. |
25 |
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Contents |
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Page |
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Annex |
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Adjust other functions ………………………………………………………………………………………. |
26 |
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Installation in non-metallic vessel ………………………………………………………………………. |
27 |
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Revised………………………………………………………………………………………………………….. |
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Examples of Installation ……………………………………………………………………………………. |
28 |
3
Dimensions
180
130
~355
b = 60
A. F. 41
1″ BSP to DIN ISO 228
1 2
1000
Fig. 1
4
Functional Elements
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A |
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B |
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40 |
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A. F. 41 |
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C |
E |
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1 |
2 |
3 |
4 |
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D |
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>14 |
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50 |
65-70 |
N10 |
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Ø 40 |
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1″ BSP to DIN |
0.5 |
N8 |
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Fig. 2 |
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Fig. 3 |
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Functional Elements
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MAX 70°C |
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% |
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MAX 95% |
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IP 65 |
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F |
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G |
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Fig. 4 |
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6 |
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1 |
2 |
3 |
4 |
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H |
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15 |
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14 |
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O |
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12 |
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11 |
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9 |
10 |
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9 |
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I |
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7 |
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N |
4 |
6 |
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3 2 |
5 |
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4 |
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M |
1 |
2 |
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1 |
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J |
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L |
K |
J |
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Fig. 5 |
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6 |
Key
1LED 1 red
2LED 2 red
3LED 3 yellow
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4 |
LED 4 red |
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5 |
LED «Mains supply ON» green |
6Code switch S1
7Potentiometer for time delay (0 to 30 sec.)
8TEST button
9 RESET button
AGasket
BThermal insulation
CElectrode thread 1″ BSP to DIN EN 228
DJoint ring Ø33×39 to DIN 7603 made from 1.4301
ESeating surface
FHousing lid
GHousing screws (cross recess head screws M4)
HTerminal strip for control cable connection
I Cable gland 3xM16x1.5
J Terminal strip for mains supply
KFixing screws for electronics insert
LPE connection
MFixing nut for terminal box
NTerminal lugs for electrode wires, functional earth
OTerminal strip for pushbuttons
7
Important notes
Usage for the intended purpose
The level switch NRGS 15 — 1 is designed for detecting and signalling levels in liquids with a minimum electrical conductivity.
The equipment must only be used within the admissible pressure and temperature ratings.
Any type of use differing from the usage described above must be considered as improper. The resulting risk will have to be borne by the user alone. The manufacturer hereby expressly rejects any claims for any damage resulting from improper usage.
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.
Danger
Danger
When loosening the level electrode steam or hot water might escape. This presents the danger of severe scalds to the whole body.
It is essential not to mount or dismantle the electrode unless the boiler pressure is verified to be zero!
The electrode becomes hot during operation. Touching the hot equipment presents the risk of severe burns to hands and arms. All installation, removal and maintenance work must only be performed when the system is cold.
Danger
The terminal strip of the level switch is live during operation. This presents the danger of electric shock!
Cut off power supply before opening the housing cover of the level switch! After removing the housing cover check again that the system is deenergized.
To check the power supply or the correct functioning, switch the level switch on again. This work must only be performed by qualified personnel.
8
Explanatory Notes
Scope of supply
NRGS 15-1
■1 Level electrode with four tips
■1 Terminal box with integrated level switch
■1 Joint ring Ø33×39 to DIN 7603, made of 1.4301 E8P
■1 Installation manual
or
NRGS 15-1
■1 Level electrode with four tips
■1 Terminal box with integrated level switch and built-in Test and Reset pushbutton
■1 Joint ring Ø33×39 to DIN 7603, made of 1.4301 E8P
■1 Installation manual
Function
The level switch NRGS 15-1 is a compact-type system consisting of a level electrode with four tips and an integrated level switch. For the correct functioning of the equipment the water must have a minimum conductivity of >0.5µS/cm at 25°C.
In the integrated level switch a time-delayed switching channel, an output relay and a signal LED are assigned to each one of the four electrode tips.
The functions of the switching channels 1 and 4 are fixed, the switchting channels 2 and 3 can be adjusted via code switch to suit individual requirements. The tips of the electrode are cut to length on site in order to establish the desired switchpoints of the associated switching channels.
The following functions are possible:
■Electrode rod 1 exposed / switching channel 1 energizes relay 1 = low level 1 with optional performance test and lock-out function
■Electrode rod 2 exposed / switching channel 2 energizes relay 2 = low level 2
■Electrode rod 3 exposed or submerged / switching channel 3 energizes relay 3 as a function of time = timed pump control (fill/discharge control)
■Electrode rod 3 exposed or submerged / switching channel 3 energizes relay 3 = on/off pump control (fill/discharge control)
■Electrode rod 4 submerged / switching channel 4 energizes relay 4 = high level
9
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GESTRA NRGS 15-1 Installation instructions manual
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GESTRA NRGS 15-1 Original installation & operating manual
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GESTRA Steam Systems
NRGS 15-1
╞
Installation Instructions 818479-00
Level Switch NRGS 15-1
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[Page 1] GESTRA NRGS 15-1 1 EN English Level switch NRGS 15-1 Original Installation Instructions 818479-04 |
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[Page 2] GESTRA NRGS 15-1 2 Contents Page Important notes Usage for the intended purpose …………………………………………………………………………………………………4 Function ………………………………………………………….. |
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[Page 3] GESTRA NRGS 15-1 3 Contents Page — continued — Electrical connection Level switch NRGS 15-1 ………………………………………………………………………………………………………..19 Connecting level switch NRGS 15-1 ………………. |
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[Page 4] GESTRA NRGS 15-1 4 Important notes Usage for the intended purpose The level switch NRGS 15-1 is designed for detecting and signalling four different liquid levels and works for instance in condensate and feedwater tanks, steam boilers and (pressurised) hot-water in-… |
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[Page 5] GESTRA NRGS 15-1 5 Danger When loosening the level electrode steam or hot water might escape. This presents the danger of severe scalds to the whole body. Do NOT remove the level switch unless the boiler pressure is verified to be 0 bar. The level switch becomes ho… |
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[Page 6] GESTRA NRGS 15-1 6 ATEX (Hazardous Area) LV (Low Voltage) Directive and EMC (Electromagnetic Compatibility) The equipment meets the requirements of the Low Voltage Directive 2014/68/EU and the EMC Directive 2014/30/EU. According to the European Directive 2014/34/EC… |
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[Page 7] GESTRA NRGS 15-1 7 Level switch NRGS 15-1 Technical Data Service pressure PN 25, 25 bar at 224°C Mechanical connection Screwed G 1A, ISO 228 Materials Screw-in body: 1.4571, CrNiMoTi17-12-2 or 1.4404, A 470 316L for NPT thread Electrode rods: 1.4571, CrNiMoT… |
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[Page 8] GESTRA NRGS 15-1 8 Technical Data Level switch NRGS 15-1 Cable entry / electrical connection 3 cable glands with integral cable clamps (M 16) 1 two-pole terminal strip for power supply. 1 twelve-pole terminal strip for connecting the control cables. 1 four-po… |
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[Page 9] GESTRA NRGS 15-1 9 Protection Manufacturer Disposal note De-energizing delay / Response sensitivity Service pressure/temperature Safety note Equipment designation Name plate / marking Fig. 1 Technical Data Before removing cover, isolate from power supplies. See in… |
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[Page 10] GESTRA NRGS 15-1 10 4 3 A Technical Data Dimensions 180 357 1000 Fig. 2 b = 60 G 1A, ISO 228 130 ∅ 42 — continued — |
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[Page 11] GESTRA NRGS 15-1 11 Selecting function Before installing and commissioning the NRGS 15-1 ascertain the settings for the required functions. Five functions are available: Function 1 Default factory setting for equipment without pushbutton Code switch Toggle switch… |
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[Page 12] GESTRA NRGS 15-1 12 F Fig. 3 Establishing Functions Level switch NRGS 15-1 Fig. 4 7 65 § » 890 ! ( ) % $ & / 1234 15s 0s 5s 25s 30s 20s10s — continued — |
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[Page 13] GESTRA NRGS 15-1 13 Establishing Functions Establishing functions 1. Set the code switch & to the desired function. For this purpose you can use a screwdriver with a thin blade. 2. Use a waterproof marker to enter the established function for each electrod… |
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[Page 14] GESTRA NRGS 15-1 14 Establishing Functions Adjusting sensitivity range The default factory setting for the response sensitivity is ≥ 10 μS/cm. If the electrical conductivity of the boiler water is below 10 μS/cm at 25°C use the code switch & to change the… |
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[Page 15] GESTRA NRGS 15-1 15 Note n For the approval of the boiler standpipe the relevant regulations must be considered. n Refer to page 18 for typical installation examples. n Install the level switch only in a vertical position. n The seating surfaces of the standpi… |
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[Page 16] GESTRA NRGS 15-1 16 4 3 21 A B = Installation Fig. 5 NRGS 15-1 Ra 3.2 0.5 ∅ 40 b d c 50 ≥50 65 – 70 G 1A, ISO 228 Ra 12.5 Fig. 6 a 40 — continued — |
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[Page 17] GESTRA NRGS 15-1 17 1. Determine the measuring lengths of the electrode tips and enter the lengths in the table «Functions». 2. Cut the electrode tips 1 2 3 4 to lengths with a bolt cutter. 3. Deburr the end faces of the electrode tips. … |
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[Page 18] GESTRA NRGS 15-1 18 Examples of installation e Flange PN 40, DN 50, DIN EN 1092-01 or flange PN 40, DN 100, DIN EN 1092-01 f For the approval of the boiler standpipe with connecting flange the relevant regulations must be considered. g e. g. reducer … |
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[Page 19] GESTRA NRGS 15-1 19 Electrical connection Level switch NRGS 15-1 A self-locking fixing nut § connects the terminal box to the electrode part. Before establishing the electrical connection you can turn the terminal box through max. +/- 180° into the desired direct… |
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[Page 20] GESTRA NRGS 15-1 20 Tools n Screwdriver, size 2 n Screwdriver, size 2.5, completely insulated according to VDE 0680 Electrical connection Wiring diagram Fig. 9 4 2 1 5 6 7 8 9 10 11 13 2 3 4 1 4 3 2 1 TEST RESET 4 3 2 1 14 15 12 NL 4 Mains supply Electrode wir… |
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[Page 21] GESTRA NRGS 15-1 21 Attention n The following relocations of cables with basic insulation are not permissible: Mains and control cables in low voltage areas. n To prevent the welding together of contacts provide an external slow-blow fuse T 2.5 A for the output c… |
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[Page 22] GESTRA NRGS 15-1 22 Commissioning procedure Checking switchpoints and functions Danger The terminal strip of the level switch is live during operation. This presents the danger of electric shock! Always cut off power supply to the equipment before mounting, removing … |
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[Page 23] GESTRA NRGS 15-1 23 Commissioning procedure Checking switchpoints and functions Timed pump control (fill control) = electrode tip 3 Activity Display Function Lower water level until it is below the switchpoint «Pump ON». Electrode rod 3 emerges LED 3 ill… |
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[Page 24] GESTRA NRGS 15-1 24 Attention Before carrying out the fault diagnosis please check: Supply voltage: Is the equipment supplied with the mains voltage specified on the name plate? Wiring: Is the wiring in accordance with the wiring diagram? Troubleshooting Indic… |
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[Page 25] GESTRA NRGS 15-1 25 Troubleshooting Indication, diagnosis and remedy Switchpoint has been reached — incorrect function Status and indication Error Remedy Incorrect function when switchpoint is reached The electrode tips have been cut to the wrong length. Assign t… |
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[Page 26] GESTRA NRGS 15-1 26 Removing and disposing of the level switch Removing and disposing of the level switch Before removing the level switch take it out of service and cut off its voltage supply. 1. Undo the cover screws ( and remove the housing lid ). (Fig. 3, 4) 2…. |
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[Page 27] GESTRA NRGS 15-1 27 Adjust other functions The level switch assigns one switching channel to each electrode tip. The functions of the switching channels 1 and 4 are fixed, the switchting channels 2 and 3 can be adjusted via code switch & to suit individual req… |
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[Page 28] GESTRA NRGS 15-1 28 818479-04/08-17cm (808588-06) · GESTRA AG · Bremen · Printed in Germany GESTRA AG Münchener Straße 77 28215 Bremen Germany Telefon +49 421 3503-0 Telefax +49 421 3503-393 E-mail [email protected] Web www.gestra.de Agencies all … |