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New Cosmos Electric NV-400 Installation Manual

Combustible gas detection system
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NV-400, 410, 500, 600
Combustible Gas Detection System
Installation Manual
This manual is for NV-400, 410, 500 and 600.
Thoroughly read this instruction manual before using the equipment so that
it can be used safely and correctly.
Keep this instruction manual where it is readily accessible
New-Cosmos Electric Co., Ltd.
Installation manual No..
GAE-024
Jan. 2006

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Summary of Contents for New Cosmos Electric NV-400

  • Page 1 NV-400, 410, 500, 600 Combustible Gas Detection System Installation Manual This manual is for NV-400, 410, 500 and 600.  Thoroughly read this instruction manual before using the equipment so that  it can be used safely and correctly. ...

  • Page 2: Table Of Contents

    Table of Contents 1. INTRODUCTION..........................2 2. SAFE OPERATION .......................... 2 3. UNPACKING........................……….3 4. INSTALLATION AND WIRING ....................... 4 4-1 How to Install the Indicator and Alarm Unit ................4 4-2 How to Install the Gas Detector ....................6 4-3 Wiring ............................

  • Page 3: Introduction

    1. Introduction Thank you very much for purchasing NV-400, 410, 500, 600, that is a gas detection /alarm system. This system is used to prevent leakage of combustible gas. This equipment continuously monitors for leakage of combustible gas, and indicates when a preset level has been exceeded by a lamp and sound. Thoroughly read this instruction manual before using the equipment so it can be used correctly.

  • Page 4: Unpacking

    1 ea. Sample gas collector PE-N3 (for Suction type gas detector head only) 1 ea. NV-□□□ instruction manual NV-400, 410, 500, 600 installation manual (this book) Test results of the equipment Optional items (separately sold) Rainproof cover KW-15 for Diffusion type gas detector head KD-5-N...

  • Page 5: Installation And Wiring

    4. Installation and Wiring 4-1 How to Install the Indicator and Alarm Unit The equipment can be hung on the wall or embedded. WARNING The indicator and alarm unit is not an explosion-proof construction. Install it in a non-hazardous area. CAUTION ...
  • Page 6 Fig.2 indicator alarm unit installation MEMO Leave a 40 cm space under equipment’s body maintenance work. Maintenance Bolt space Fig. 2 Embedding on a Panel Main body (2) How to embed on a panel ① Cut out a rectangular opening in the panel as shown in Fig. bolt (2) How to install Flush mount type panel 1) Cut a panel as shown in Fig 3.

  • Page 7: How To Install The Gas Detector

    4-2 How to Install the Gas Detector CAUTION  The gas detector must be handled with care to avoid damaging the explosion proof construction.  Do not install the Gas detector in locations listed below: -Location where the ambient temperature may drop lower than –３０˚C or exceed ４０˚C. -Location where dew condensation may occur.
  • Page 8 ・How to install the fixing plates Locate the gas detector head between the fixing plates (Saddle and Stand)and tighten the pan-head screw to fix. Fixing plate (saddle) Pan-head Fix on the wall with attached the Fixing plate (stand) M6 Hexagon Bolt and Nut. Fig .6 How to install the fixing plates ・How to install the Rainproof cover (optional item) and Rainproof cap(optional item) Tighten the screw to fix...
  • Page 9 ・Example : locations to install Drain pit A location where is not easy to access for maintenances. Fig.8 Example-location for suction type gas detector head CAUTION  Sample gas collector should be installed at high location where is free from sucking water. ・Installation for Rainproof cover(PW-51) Rainproof cover (PW-51) Gap plate...

  • Page 10: Wiring

    4-3 Wiring Use explosion-proof wiring in all potentially hazardous places. (1) Refer to the following (KD-5, PE-2DC) with regard to wiring for explosion-proof metal conduits. WARNING  When wiring, be sure to turn the indicator and alarm unit off before opening the cover of Gas Detector, otherwise it may become a source of ignition.
  • Page 11  Mounting Example (KD-5 Diffusion Type Detector) Partition Non-hazardous area Hazardous area Do not locate any joints of electrical conduits in this space Flexible Union coupling Diffusion Setting fitting Putty Gas Detector PYRACK Thick steel metal conduit Setting fitting Coupling may be placed on this side.
  • Page 12 KD-5 Diffusion Type Detector Cable outer Packing hole Washer hole diameter diameter diameter 11 to 11.9 PE-2DC Suction Type Detector Cable outer Packing hole Washer hole diameter diameter diameter 12 to 12.9 13 to 13.9 14 to 14.9...

  • Page 13: Wiring And Connection

    4-4 Wiring and Connection (1) Gas Detector Wiring and Connection WARNING  When wiring, be sure to turn off the indicator and alarm unit before opening the cover of Gas Detector, otherwise it may become a source of ignition.  Be sure to ground the indicator alarm block along with the Gas Detector.
  • Page 14 24V DC Input (with NVAL-52A Alarm Unit) 2) Wiring between Indicator Alarm Block and Gas Detector Use 600V vinyl-insulated electric cords (1V) or cables, such as the VCT and CVV (0.75 to 2 mm in diameter). The wiring length must be within the following ranges: Wire with 0.75 mm dia.: 200 m max.
  • Page 15 NV-4□□,500,600 Indicator Alarm Block (2) Connection of External Buzzer Contacts CAUTION Use external contacts for external buzzers or alarm indicators only.  Check that the load current or voltage will not be in excess of the contact capacity.  If interlock or other control is performed through the external buzzer contacts, we shall NOT take any ...
  • Page 16 Connection examples of alarm output terminals.  NV-4 or NV-600 Indicator Alarm Block  NV-500 Indicator Alarm Block...
  • Page 17 (3) Connection of the External Buzzer EB-5B By connecting the Zener Barrier for external buzzer output, the EB-5 External Buzzer will have a safety explosion-proof feature and can be used in hazardous places, such as gas filling sites. CAUTION  The EB-5 External Buzzer itself does not have an explosion-proof construction.

  • Page 18: Indicator Alarm Circuit Diagram

    5. Indicator Alarm Circuit Diagram A standard circuit diagram is shown below. The circuit diagram may vary depending on the specifications. In this case, refer to the relevant specifications. 5-1 100 to 240V AC Input NV-4 or NV-600 Indicator Alarm Block...
  • Page 19 NV-500 Indicator Alarm Block...

  • Page 20: Dc Input

    5-2 24V DC Input NV-4□□ or NV-600 Indicator Alarm Block...
  • Page 21 NV-500 Indicator Alarm Block...

  • Page 22: Glossary

    6. Glossary Indicator / Alarm unit: A unit that receives signals from the gas detector and indicates gas concentration and alarms. Detector: A unit that detects gas concentration and converts it to electric signals. Backup power source device: A device that supplies power to the gas detector, indicator / alarm unit in order to maintain its performance during a power failure.
  • Page 23 Date Revisions GAE-022 Jan. 2006 Additional copies of this Operation Manual are available. Contact the following address for ordering information. Distributor: Manufacturer: New Cosmos Electric Co., Ltd. 2-5-4 Mitsuya-naka Yodogawa-ku Osaka 532-0036, Japan Phone 81-6-6309-1505 Fax 81-6-6309-1514 Email e-info@new-cosmos.co.jp http://www.new-cosmos.co.jp...

This manual is also suitable for:

Nv-410Nv-500Nv-600

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