Flowserve NRA 1-3 User Manual
GESTRA Steam Systems
NRA 1-3
Installation Instructions 818678-00
Test Station
NRA 1-3
1
2
Contents
Page
Important Notes
Usage for the intended purpose ..............................................................................................................4
Safety note .............................................................................................................................................4
Danger ...................................................................................................................................................4
ATEX (Atmosphère Explosible) .................................................................................................................4
Explanatory Notes
Scope of supply ......................................................................................................................................5
Description .............................................................................................................................................5
Function .................................................................................................................................................5
System components ...............................................................................................................................5
Technical Data
NRA 1-3
Name plate / marking .............................................................................................................................7
Dimensions NRS 1-3
Installation
Test station NRA 1-3a .............................................................................................................................9
Test station NRA 1-3e .............................................................................................................................
Note .......................................................................................................................................................9
Tools .......................................................................................................................................................9
............................................................................................................................................. 6, 7
...............................................................................................................................8
9
Functional Elements
NRA 1-3................................................................................................................................................10
Key ....................................................................................................................................................... 11
Wiring
Connecting line of temperature sensor for detecting the temperature of the installation .......................12
Connecting line of measuring electrodes ..............................................................................................12
Wiring ..................................................................................................................................................12
Attention .............................................................................................................................................. 12
Tools ....................................................................................................................................................13
Wiring diagram for test station NRA 1-3 ............................................................................................... 13
Basic Settings
Factory setting .....................................................................................................................................14
Contents – continued –
Page
Commissioning
Check wiring ........................................................................................................................................14
Set operating mode ..............................................................................................................................14
Note .....................................................................................................................................................15
Establishing the number of measuring channels ...................................................................................15
Note .....................................................................................................................................................15
Switching on supply voltage .................................................................................................................15
Operation, Alarm and Test
Specification of keys and display ..........................................................................................................16
Key to codes on seven-segment displays ..............................................................................................16
Start .....................................................................................................................................................17
Setting banking-up of condensate, mode 1 and 6 .................................................................................17
Setting banking-up of condensate, mode 2 and 7 .................................................................................18
Alarm messages ................................................................................................................................... 19
Alarm list, maintenance interval and test, mode 1 to 7 .................................................................... 19, 20
Note .....................................................................................................................................................20
Malfunctions .........................................................................................................................................20
Decommissioning
NRA 1-3................................................................................................................................................21
Danger .................................................................................................................................................21
Disposal
NRA 1-3................................................................................................................................................21
Annex
Declaration of Conformity CE ................................................................................................................22
3
4
Important Notes
Usage for the intended purpose
Use the test station NRA 1-3 only in conjunction with the electrodes NRG 16-19, NRG 16-27 and
NRG 16-28 for monitoring steam traps for banking-up of condensate and loss of steam.
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 personnel who – through
adequate training – have achieved a recognised level of competence.
Danger
The terminal strips of the test station NRA 1-3 are live during operation.
This presents the danger of electric shock.
Cut off power supply before mounting, removing or connecting the terminal strips.
ATEX (Atmosphère Explosible)
According to the European Directive 94/9/EC the equipment must not be used in explosion risk areas.
Explanatory Notes
Scope of supply
NRA 1-3
1 Test station NRA 1-3
1 Installation manual
Description
The measuring electrode detects banking-up of condensate and steam loss either directly in the steam
trap or in separate test chambers.
The measuring electrodes NRG 16-27, NRG 16-28 feature an additional temperature sensor for
measuring the temperature of the condensate.
Up to 16 measuring electrodes and a temperature sensor for measuring the temperature of the installa
tion can be connected to the test station NRA 1-3.
Function
The following electrodes can be used for monitoring steam traps:
n Measuring electrode NRG 16-19 for detecting banking-up of condensate or steam loss (electrode
submerged or exposed)
n Measuring electrode NRG 16-27, NRG 16-28 for detecting steam loss and banking-up of conden-
sate, with the condensate temperature being measured by an integrated temperature sensor
Three LEDs indicate banking-up of condensate, steam loss and malfunction in measuring electrode
(cable disruption, short circuit) and a three-digit seven-segment display shows the number of the
faulty steam trap. If more than one steam trap are defective the numbers of the faulty traps are
indicated one after another.
If banking-up of condensate, steam loss or malfunction in measuring electrode is indicated, an output
relay for the collective alarm will also be energised.
When using the measuring electrodes NRG 16-27, NRG 16-28 you can set the switchpoint for the
message “Banking-up of condensate” as a function of the separately detected temperature of the
installation or of the temperature measured in the steam trap.
The seven-segment display indicates every 6 months the maintenance interval of the measuring
electrodes in the form of an error code.
The seven-segment display indicates also status and error messages.
-
System components
TRG 5-63 (e. g.)
Temperature sensor with resistance thermometer Pt 100 for measuring the temperature of the
installation.
NRG 16-19
Measuring electrode for detecting banking-up of condensate or steam loss (electrode submerged or
exposed).
NRG 16-27, NRG 16-28
Measuring electrode for detecting banking-up of condensate or steam loss (electrode submerged or exposed) with integrated temperature sensor PT 1000 for measuring the temperature of the condensate.
5
6
Technical Data
NRA 1-3
Supply voltage
230 V, 50 / 60 Hz
115 V, 50 / 60 Hz optional
Input
16 inputs for measuring electrodes NRG 16-19, NRG 16-27, NRG 16-28
1 input for temperature sensor, e. g. TRG 5-63, temperature sensing element Pt 100
Output
1 volt-free relay contact
Contact material: AgNi 0,15
Max. contact rating for switching voltages of 24 V AC/DC, 115 V AC and 230 V AC:
4 A resistive / inductive
Electrode voltage
12 V
Banking-up of condensate setting
Difference temperature condensate/installation dts 1 K to 100 K, adjustable in steps of 1 K
(mode 1 and 6)
Difference temperature condensate/switchpoint banking-up of condensate dtC 1 K to 100 K,
adjustable in steps of 1 K (mode 2 and 7)
Switchpoint banking-up of condensate 0 °C to 255 °C, adjustable in steps of 5 K (mode 2 and 7)
Indicators and adjustors
1 Three-digit seven-segment LED display, red, for indicating faulty steam traps and status and error
messages
3 LEDs for indicating banking-up of condensate, steam loss and malfunction in measuring electrode
3 Pushbuttons for parameter settings
1 Ten-pole code switch for system configuration
Delay of response
max. 5 sec.
Power consumption
max. 4 W
External fuse
63 mA
Design
NRA 1-3a: for wall mounting
NRA 1-3e: for panel mounting
Protection
NRA 1-3a: IP 65 to EN 60529
NRA 1-3e: Front: IP 65 to EN 60529, back: IP 00
Protection class
NRA 1-3a: 2 (completely insulated)
Max. admissible ambient temperature
55 °C
Enclosure
Material: ABS
Technical Data – continued –
NRA 1-3 – continued –
Cable entry / Wiring
Cable gland with integral cable clamp, 8 x M 16 x 1.5, 17 five-pole screw-type terminals,
conductor size 1.5 mm
Max. cable length
50 m
Weight
Approx. 2 kg
Name plate / marking
Admissible ambient temperature
2
Safety note
Equipment designation
Electrical rating
Protection
Fig. 1
Manufacturer
Disposal note
CE marking
Specification for ordering
spare parts
7
8
Technical Data – continued –
Dimensions NRA 1-3
Fig. 2
Test station NRA 1-3 a
137
146.7
226.5
Fig. 3
Test station NRA 1-3 e
Front panel cut-out 236x151
105
146.7
226.5
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