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Decommissioning

Exchanging the conductivity switch

1. Switch off mains voltage.
2. Undo cover screws

and remove the housing cover

(Fig. 2, 3)

3. Detach mains and control cables from terminal strips

and pull lines out of the cable glands.

4.  Detach connecting line to conductivity electrode.
5.  Remove conductivity switch.
6.  Install and connect new conductivity switch.
7.  Attach connecting line to conductivity electrode.
8.  Apply mains voltage.

Danger

The terminal strips of the conductivity switch LRS 1-7 are live during operation.

This presents the risk of severe cases of electric shock!

Always

cut off power supply

to the equipment before mounting, removing or connecting

the terminal strips!

Disposal

Dismantle the conductivity switch and separate the waste materials, using the material specification

as a reference. Electronic component parts such as the circuit board must be disposed of separately!

For the disposal of the conductivity switch observe the pertinent legal regulations concerning waste

disposal.

Содержание LRS 1-7

Страница 1: ...1 LRS 1 7 Installation Operating Instructions 818872 02 Conductivity Switch LRS 1 7 GESTRA Steam Systems EN English ...

Страница 2: ...n 5 LRS 1 7 9 Key 10 Dimensions Functional Elements Electrical Connection Technical Data LRS 1 7 6 7 Name plate Marking 8 Connecting conductivity electrode LRG 16 9 11 Attention 11 Connecting conductivity electrode ERL 16 LRG 16 4 11 Connecting conductivity switch LRS 1 7 12 Connecting power output 12 Attention 12 Tools 12 Wiring diagram for conductivity switch LRS 1 7 continuous blowdown control ...

Страница 3: ...ooting 20 21 Malfunctions LRS 1 7 18 Note 18 Operation Danger 22 Exchanging the conductivity switch 22 Disposal 22 Decommissioning Commissioning Keys and indicators 15 Checking electrical connection 15 Applying mains voltage 15 Factory setting 16 Setting parameters 16 17 ...

Страница 4: ...nance work must only be performed by qualified staff who through adequate training have achieved a recognised level of competence LV Low Voltage Directive and EMC Electromagnetic Compatibility The equipment meets the requirements of the Low Voltage Directive 2014 35 EU and the EMC Directive 2014 30 EU ATEX Atmosphere Explosible According to the European Directive 2014 34 EU the equipment must not ...

Страница 5: ...steam boiler installations The two point controller controls a continuous blowdown valve and auto matically closes it when the boiler is shut down In addition the valve can be opened and closed at certain intervalvs purging pulses This prevents the continuous blowdown valve from getting stuck A current signal of 4 20 mA is available for external processing The current signal is proportional to the...

Страница 6: ...mit MAX adjustable between 0 5 and 9999 μS cm or 0 25 up to 5000 ppm Correction factor adjustable between 0 05 and 5000 adjustable in increments of 0 001 Temperature coeffizient Tk 0 0 3 0 per C adjustable in increments of 0 1 Actual value output option 0 5 mA in the event of failure E 01 E 04 at the end of the start phase 4 mA corresponds to 0 5 μS cm 20 mA corresponds to 10 200 500 1000 6000 999...

Страница 7: ...class 2 totally insulated Ambient temperature Max 70 C Housing Housing material Polycarbonate Cable entry Wiring Cable gland with integral cable clamp 3 x M 16 x 1 5 1 four pole screw type terminal strip for power supply 1 three pole screw type terminal strip for connecting the continuous blowdown valve 1 three pole screw type terminal strip for MAX limit 1 two pole screw type terminal strip for c...

Страница 8: ...ies See installation instructions Avant d ouvrir le couvercle dèconnecter complètement l appareil Voir instructions de montage Vor Öffnen des Deckels Gerät freischalten Betriebsanleitung beachten 250 V T 2 0 A 6VA LRS 1 7 0 5 10000μS cm 0 25 5000ppm GESTRA AG Münchener Str 77 D 28215 Bremen Tamb 70 C 158 F IP65 50 60 Hz VS Nr Mat Nr 230VAC Leitfähigkeitsschalter Conductivity Limit Switches Commuta...

Страница 9: ...9 Dimensions Functional Elements Fig 2 LRS 1 7 7 2 1 6 Fig 3 c b 0 9 8 5 3 4 a 180 129 6 0 d ...

Страница 10: ...ached 4 LED 4 The continuous blowdown valve opens 5 LED 5 Continuous blowdown valve in operating position 6 Seven segment display indication of actual value or setpoint temperature error code 7 Pushbuttons 8 Cover screws cross recess head screws M4 9 Housing cover 0 M 12 sensor jack 5 poles A coded a Terminal strips b Cable glands 3 x M 16 x 1 5 c Sealing plug d Fixing hole 4 5 mm Key ...

Страница 11: ... cable assembly is not used a screened five core control cable e g Ölflex 110 CH manufactured by Lapp 5 x 0 5 mm2 or LiYCY 5 x 0 5 mm2 Max cable length between conductivity electrode and switch 30 m with conductivites from 0 5 to 10 μS cm max 10 m Connecting conductivity electrode LRG 16 9 Attention n If the above mentioned control cable assembly is not used the connecting line must be provided wi...

Страница 12: ... it by turning the knurled nut Connecting conductivity switch LRS 1 7 Attention n Mains and control cables with basic insulation must not be located in areas of extra low voltage n Provide conductivity switch with fuse see Technical Data n Provide control circuit with a slow blow fuse 2 0 A n Provide connected contactors with RC combinations according to manufacturer s specification to ensure inte...

Страница 13: ... connector male g Connecting line h Conductivity electrode ERL 16 LRG 16 4 without Pt 100 L2 must remain live after the burner stand by operation is shut down until the continuous blowdown valve is motored to close L1 and L2 must be connected to an external conductor of the same phase Fig 4 P1 P2 LRS 1 7 P3 P14 f j i P5 P4 P7A P7B P6 m k g h i Current output 4 20 mA load max 500 Ω j Limit contact ...

Страница 14: ...ne h Conductivity electrode ERL 16 LRG 16 4 without Pt 100 Fig 5 P1 P2 LRS 1 7 P3 P14 f j i e g h i Current output 4 20 mA load max 500 Ω j Limit contact MAX k S1 Disconnector l F1 Fuse output contact F2 Fuse conductivity switch m Electric or pneumatic three way valve m Valve OPEN Fluid is flowing through Valve CLOSED Fluid is discharged or retained Safety position Spring to close Contacts shown a...

Страница 15: ...n the seven segment display LED 3 MAX limit reached LED 4 Continuous blowdown valve opens LED 5 Continuous blowdown valve in operating position Keys and indicators 1 Make sure that the conductivity switch is wired as specified in the wiring diagram 2 Make sure that the supply voltage agrees with the specification on the name plate Checking electrical connection Apply mains voltage First the type d...

Страница 16: ...Key Adjustment range Key Indication P P 1 Setpoint W 1 _SP E P 0 5 9999 µS cm to change press buttons E SAVE return to 1 setpoint 2 MAX limit 2 _AL E P 0 5 9999 µS cm to change press buttons E SAVE return to 2 MAX limit 3 Correction of measured value 3 _CF E P 0 050 5 000 to change press buttons E SAVE return to 3 correction of measured value 4 PT 100 4 _Pt E P ON OFF to change press buttons E SAV...

Страница 17: ...he conditions of the installation Setting further parameters n The electrical conductivity is measured in μS cm In some countries ppm parts per million is used instead Conversion 1 μS cm 0 5 ppm In parameter 5 Unit you can specify the desired unit of measurement This unit setting is then applicable for all conductivity readings and settings If you choose ppm as unit of measurement please use a wat...

Страница 18: ...ng interval has been activated Actual value X set point W Indication of actual value X LEDs 1 and 5 illuminated Continuous blowdown valve in OPERATING position Actual value X set point W Indication of actual value X LEDs 1 and 4 illuminated The continuous blowdown valve is motored into the OPEN position Once the conductivity has fallen by 10 of the setpoint the valve is motored into the OPERATING ...

Страница 19: ...ne Replace conductivity electrode E 02 Signal from resistance thermo meter Pt 100 corresponds to a temperature of 280 C Check connecting line Replace conductivity electrode E 03 Short circuit in conductivity electrode Check connecting line replace conductivity electrode E 04 Interruption in conductivity electrode Check connecting line replace conductivity electrode If an error is indicated the LED...

Страница 20: ...g the knurled nut Error code E 01 LED LEDs 3 and 5 are illuminated Fault Signal from resistance thermometer Pt 100 corresponds to a temperature of 0 C Remedy Check connecting line Replace conductivity electrode Error code E 02 LED LEDs 3 and 5 are illuminated Fault Signal from resistance thermometer Pt 100 corresponds to a temperature of 280 C Remedy Check connecting line Replace conductivity elec...

Страница 21: ...rrection of measured value and if necessary temperature coefficient 4 1 TK Fault Indicated conductivity reading is smaller than the reference value Remedy Change correction factor 3 Correction of measured value and if necessary temperature coefficient 4 1 TK Fault The measured value cannot be adapted by changing the correction factor or the temperature coefficient Remedy Remove conductivity electr...

Страница 22: ...ity electrode 8 Apply mains voltage Danger The terminal strips of the conductivity switch LRS 1 7 are live during operation This presents the risk of severe cases of electric shock Always cut off power supply to the equipment before mounting removing or connecting the terminal strips Disposal Dismantle the conductivity switch and separate the waste materials using the material specification as a r...

Страница 23: ...23 For your notes ...

Страница 24: ...8782 02 GESTRA AG Bremen Printed in Germany Agencies all over the world www gestra de GESTRA AG Münchener Straße 77 28215 Bremen Germany Telefon 49 421 3503 0 Telefax 49 421 3503 393 E mail info de gestra com Web www gestra de ...

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