Flowserve NRS 2-3 User Manual
NRS 2-3
Installation Instructions 810414-01
Level Switch Type NRS 2-3
1
Contents
Page
Important Notes
Usage for the intended purpose ......................................................................................6
Safety Note .....................................................................................................................6
Warning ...........................................................................................................................6
Explanatory Notes
System description ..........................................................................................................7
Function .......................................................................................................................... 7
Design .............................................................................................................................8
Technical data ........................................................................................................... 8 – 9
Installation
Design “b” ......................................................................................................................10
Design “c”/“d” ................................................................................................................10
Tools ..............................................................................................................................10
Wiring
Design “b” ......................................................................................................................11
Wiring diagram for design “b” ........................................................................................11
Key to wiring diagram.................................................................................................... 11
Design “c”/“d” ................................................................................................................12
Wiring diagram for design “c”/“d”................................................................................... 12
Attention ........................................................................................................................12
Commissioning
Warning .........................................................................................................................13
Check wiring.................................................................................................................. 13
Apply mains voltage ......................................................................................................13
Adjust switchpoint “Low Level” ......................................................................................13
Adjust switchpoint “Pump
Adjust switchpoint “Pump
ON” ........................................................................................13
OFF” ......................................................................................14
Adjust switchpoint “High Level” ..................................................................................... 14
Table “Switchpoints” ......................................................................................................14
Operation
Warning .........................................................................................................................15
Correct switchpoints ......................................................................................................15
Check power .................................................................................................................15
Annex
Warning .........................................................................................................................16
Fault finding list for troubleshooting ............................................................................... 16
Declaration of conformity .............................................................................................. 17
2
Dimensions
207
7 9 10 11 12 13 14 15
NRS 2-3
OFF
ON
16654321
67.7
80
∅ 6
MAX
88
180
MIN
17
Fig. 1
169
NRS 2-3
MAX
OFF
ON
MIN
45.3 (9TE)
(TE = division units)
(1 TE = 5.08 mm)
128.5
3
Parts Drawings
7 9 10 11 12 13 14 15
NRS 2-3
D
C
C
MAX
OFF
E
F
KJ
ON
B
A
MIN
16654321
17
H
I
NRS 2-3
MAX
L
MAX 70 °C
OFF
4
ON
MAX 95 %
MIN
IP 10
Fig. 2
Key
A
LED “Low Level”
B
LED “Pump
C
LED “Pump
D
LED “High Level”
E
Adjustor for high level
F
Adjustor for pump
H
Adjustor for pump ON
I
Adjustor for low level
J
Fixing screws
K
Screw-type terminal strip
L
32way Euro card connector
ON”
OFF“
OFF
5
Important Notes
Usage for the intended purpose
Use level switch NRS 2-3 only in conjunction with GESTRA level transmitter
NRGT 26-1 as pump control.
Safety Note
The equipment must only be installed by qualified staff.
Qualified staff are those persons who – through adequate training in electrical
engineering, the use and application of safety equipment in accordance with
regulations concerning electrical safety systems, and first aid & accident
prevention – have achieved a recognised level of competence appropriate to
the installation and commissioning of this device.
Warning
The terminal strip of the NRS 2-3 is live during operation. This presents
the danger of electric shock.
Cut off power supply before inserting or removing the 19" slide-in unit and
before carrying out any installation or maintenance work.
6
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