Related Manuals for GESTRA NRS 2-3
Summary of Contents for GESTRA NRS 2-3
- Page 1 GESTRA Steam Systems NRS 2-3 Installation Instructions 810414-02 Level Switch Type NRS 2-3...
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Page 2: Table Of Contents
ATEX (Atmosphère Explosible) .........................4 Explanatory Notes Scope of supply ............................5 System description ..........................5 Function ..............................5 Designs ..............................5 Technical Data NRS 2-3 ..............................6 Dimensions ............................7 Functional Elements NRS 2-3 ..............................8 Key .................................9 Installation Design “b” ............................0 Design “c”/“d” ............................0 Tools ..............................0... - Page 3 Contents – continued – Page Commissioning Danger ..............................4 Note ..............................4 Checking wiring ............................4 Applying mains voltage ........................4 Adjusting switchpoint “Low Level” ......................4 Adjusting switchpoint “Pump ON” ......................4 Adjusting switchpoint “Pump OFF” ......................4 Adjusting switchpoint “High Level” .......................5 Note ..............................5 Table switchpoints ..........................5 Operation Danger ..............................6 Note ..............................6...
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Page 4: Important Notes
Important Notes Usage for the intended purpose Use level switch NRS 2-3 only in conjunction with GESTRA level transmitter NRGT 26- for pump control. Safety note The equipment must only be installed and commissioned by qualified and adequately trained per- sonnel. -
Page 5: Explanatory Notes
Installation manual Installation manual System description The level switch type NRS 2-3 is an analogue electronic control instrument (pump control) for the capacitance level transmitter type NRGT 26-S. In combination with this transmitter the equipment can signal the following levels: High level, low level, level control unit and can be used as level controller for steam boilers and pressurized hot-water plants. -
Page 6: Technical Data
Technical Data NRS 2-3 Type approval no. GL 99249-96HH LR 98/20074 BV 067/Bo RINA No ELE/30298/2 KR HMB0690-MS002 DNV A-8394 Mains voltage 230 V ± 0 %, 50/60 Hz 5 V ± 0 %, 50/60 Hz (option) 24 V ± 0 %, 50/60 Hz (option) -
Page 7: Dimensions
Technical Data – continued – Dimensions 9 10 11 12 13 14 15 ∅ 6 NRS 2-3 67.7 NRS 2-3 45.3 (9TE) (TE = division units) Fig. 1 ( TE = 5.08 mm) -
Page 8: Functional Elements
Functional Elements NRS 2-3 9 10 11 12 13 14 15 NRS 2-3 NRS 2-3 MAX 70 ° C MAX 95 % IP 10 Fig. 2... -
Page 9: Key
Functional Elements – continued – LED “Low Level” LED “Pump ” LED “Pump ” LED “High Level” Adjustor for high level Adjustor for pump Adjustor for pump Adjustor for low level Fixing screws Screw-type terminal strip 32way Euro card connector... -
Page 10: Installation
Installation Design “b” . Drill four holes into the mounting panel of the control cabinet. 2. Put level switch onto the mounting panel and align. 3. Insert matching screws and fasten. Design “c”/“d” . Install guide rails and screw-type connector into 9" mounting panel. 2. -
Page 11: Electrical Connection
Electrical Connection Design “b” Wiring is effected via the two screw-type terminal strips. Use screened two-core cable, conductor size 0.5 mm , max. cable length 50 m for the supply of the level transmitter. Wiring diagram for design “b” G 2.5 A Fig. -
Page 12: Wiring Diagram For Design "C
Electrical Connection – continued – Design “c”/“d” Wiring is effected via the 32 pole screw-type connector. Use screened two-core cable, conductor size 0.5 mm , max. cable length 50 m for the supply of the level transmitter. Wiring diagram for design “c”/“d” Fig. -
Page 13: Key To Wiring Diagram
Electrical Connection – continued – Key to wiring diagram Level transmitter, output 4 – 20 mA High level Water level controller (fill control) Low level (LED red/green) Connection for another device, e. g. NRR 2-3... -
Page 14: Commissioning
2. Make sure that the mains supply corresponds to the wiring carried out on the equipment. Applying mains voltage . Switch on the mains supply and verify that the NRS 2-3 is receiving power. The LED B or C will illuminate to verify this. -
Page 15: Adjusting Switchpoint "High Level
Commissioning – continued – Adjusting switchpoint “High Level” . Fill the tank until the max. admissible water level is reached. 2. Turn the adjustor E from the right stop slowly to the left until the red LED D lights up. Note You can directly change the switchpoints over the whole measuring range of the level transmitter by using the adjustors I for... -
Page 16: Operation
Operation Danger The terminal strip of the NRS 2-3 is live during operation. This presents the danger of electric shock. Cut off power supply before removing or inserting the 9" slide-in unit or undertaking any kind of installation or maintenance work. -
Page 17: Operational Malfunctions
Operational Malfunctions Danger 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 9" slide-in unit and before carrying out any installation or maintenance work. -
Page 18: Annex
Annex Declaration of conformity We hereby declare that the equipment NRS 2-3 conforms to the following European guidelines: LV guideline 73/23/EC version 93/68/EC ■ EMC guideline 89/336/EC version 93/68/EC ■ which are based on the following harmonised standards: LV standard EN 60947-5-: 99 73/23/EC version 93/68/EC ■... - Page 19 For your notes...
- Page 20 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 www.gestra.de 8044-02/807cm · 997 GESTRA AG · Bremen · Printed in Germany...
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