Flowserve NRGS15-1 User Manual
GESTRA Steam Systems
NRGS 15-1
Installation Instructions 818479-00
Level Switch NRGS 15-1
Contents
Page
Important notes
Usa ge for the intended purpose.......................................................................................8
Safety note.......................................................................................................................8
Danger .............................................. ...............................................................................8
Explan atory Notes
Scope of supply ...............................................................................................................9
Function............................................ ...............................................................................9
Technical data................................................................................................................10
Corrosion resistance......................................................................................................12
Establishing Functions
Select functio n ...............................................................................................................13
Factory setting ...............................................................................................................14
Cutting electrode ti ps to length ......................................................................................14
Adjust functio n ...............................................................................................................15
Set sensitivity range.......................................................................................................15
Tools ........................................................... ...................................................................15
Installation
Level switch NRGS 15-1................................................................................................16
Align terminal box ..........................................................................................................17
Remove terminal box.....................................................................................................17
Mount terminal box .......................................................... ..............................................18
Tools ........................................................... ...................................................................18
Wiring
Connec t level switch NRGS 15-1...................................................................................19
Tools ........................................................... ...................................................................19
Wir ing diagram............................................ ...................................................................20
Commissioning
Chec k wiring ..................................................................................................................21
Apply mains voltage.......................................................................................................21
Chec k switching functions..............................................................................................22
Malfunctions / Troubleshooting
Fault finding list..............................................................................................................24
Replace electronic circuit board.....................................................................................25
2
Conte nts
Page
Annex
Adjust other functions ....................................................................................................26
Installation in non-metallic vessel ..................................................................................27
Revise d..........................................................................................................................27
Examples of Installation.................................................................................................28
3
Dimensions
180
130
~355 1000
b = 60
12
A. F. 41
1" BSP to DIN ISO 228
Fig. 1
4
Func tio na l El eme nts
A
B
40
C
D
1
234
A. F. 41
E
>14
Fig. 2
50
65-70
Fig. 3
Ø 40
1" BSP to DIN
N10
0.5
N8
5
Functional Elements
Fig. 4
MAX 70 °C
%
MAX 95 %
IP 65
F
G
8
O
9
N
M
2
7
6
1
4
3
3 4
5
H
15
14
13
12
11
10
9
8
7
7
7
6
6
6
5
5
5
4
4
4
I
2
1
2
1
J
JKL
Fig. 5
6
Key
1
LED 1 red
2
LED 2 red
3
LED 3 yellow
4
LED 4 red
5
LED "Mains supply ON" green
6
Code switch S1
7
Potentiometer for ti me delay (0 to 30 sec.)
8
TEST button
9
RESET button
A
Gasket
Therma l insulation
B
C
Electrode thread 1" BSP to DIN E N 228
Joint ring Ø33x39 to DIN 7603 made from 1.4301
D
E
Seating surface
F
Housing lid
G
Housing screws (cross recess head screws M4)
H
Terminal strip for control cable connection
Cable gland 3xM16x1.5
I
J
Terminal strip for mains supply
K
Fixing screws for electronics insert
L
PE connection
M
Fixing nut for terminal box
N
Term inal lugs for electrode wires, functional earth
O
Term inal 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 mi nimum 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
expres sly rejects a ny claims for any damage resulting from improper usage.
Safety note
The equipment must only be installed and c ommissioned 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 s calds 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 term inal strip of the level sw itch is live during operation. This presents
the danger of electric s hock!
Cut of f po we r s upp l y before opening the housing cover of the level switch!
After removing the housing cov e r check aga in 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 Ø33x39 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 Ø33x39 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 inte grated 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 sw itching channels 1 and 4 are fixed, the switchting chan nels 2 and
3 can be adjusted via code switch to suit individual requirements. The tips of the electrode
are cut to l ength on site in order to establish the desired switchpoints of the associated
switching channels.
The following functions are possibl e:
■ 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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