Flowserve NRS 2-4 User Manual
NRS 2-4
Installation Instructions 810427- 00
Level Switch Type NRS 2-4
A Siebe Group Product
1
Dimensions/Parts Drawings
NRS 2-4
MAX
NRS 2-4
MAX
128,5
Fig. 1
169
45.72 (9TE)
(TE = division units)
1 TE = 5.08 mm)
E
D
A
F
C
B
MAX 70°C
MAX 95%
Fig. 2
2
IP 10
Key
A
32 way Euro card connector
B
C
D
E
F
OPERATION
LED
LED MALFUNCTION WIRE
LED DEFECTIVE PROBE
LED HIGH LEVEL
Fixing screws
3
Contents
Page
Important notes
Safety Note .....................................................................................................................5
Warning ...........................................................................................................................5
Explanatory Notes
System description ......................................................................................................... 6
Function .......................................................................................................................... 6
Design ............................................................................................................................. 6
Technical Data ................................................................................................................7
Installation
Design “c”/“d” ..................................................................................................................8
Tools ................................................................................................................................ 8
Wiring
Design “c”/“d” ..................................................................................................................9
Wiring diagram ................................................................................................................9
Key to wiring diagram ...................................................................................................10
Attention...................................................................................................................... ..10
Commissioning
Warning.........................................................................................................................11
Important note .............................................................................................................. 11
Check wiring .................................................................................................................11
Apply mains voltage......................................................................................................11
Check switching function ..............................................................................................11
Check voltage ...............................................................................................................11
Table 1 Measuring voltages ..........................................................................................12
Annex
Warning.........................................................................................................................13
Fault finding list .............................................................................................................13
Declaration of conformity ..............................................................................................13
4
Important Notes
Safety Note
Use level switch NRS 2-4 in combination with GESTRA level probe type
NRG 211 only.
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- 4 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.
5
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