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C927
Manual No. PCN002-13
Issue C.v.2
GDS2000
MODULAR GAS ALARM
OPERATING HANDBOOK
This document is not contractual and the equipment specifi cation may be modifi ed at any time without prior notice.
E:
sales@gds-technologies.co.uk
T:
0113 286 0166
F:
0113 287 8178
www.gds-technologies.co.uk
GDS TECHNOLOGIES LTD
|
FUSION POINT
|
ASH LANE
|
GARFORTH
|
LEEDS
|
LS25 2GA
|
UK
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Summary of Contents for GDS 2000
- Page 1 OPERATING HANDBOOK This document is not contractual and the equipment specifi cation may be modifi ed at any time without prior notice. sales@gds-technologies.co.uk 0113 286 0166 0113 287 8178 www.gds-technologies.co.uk GDS TECHNOLOGIES LTD FUSION POINT ASH LANE GARFORTH LEEDS LS25 2GA...
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Page 2: Table Of Contents
COPYRIGHT All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior permission of GDS Technologies Ltd. -
Page 3: Description
DESCRIPTION The GDS 2000 is a modular system designed to operate in conjunction with gas and fire sensors. Each card and connected sensor may be used as a gas/fire monitor with its own alarm outputs or coupled together with other units to form a multi-channel system of any required size, having separate and common alarm outputs. - Page 4 COMMON FACILITIES CARD (OPTIONAL) Is used in multi-channel systems to provide alarm outputs which are common to all cards within the same enclosure, and may be inserted into any slot within the enclosure. The facilities card collects alarm information from all the connected cards and provides common alarm functions as follows: Low alarm indicator Low alarm relay...
- Page 5 OVERRANGE INDICATOR Red long-life L.E.D. Initiated when the gas concentration exceeds the trip point. Adjustable between 10% and 100% F.S. preset to 100% F.S. (Gas Alarm Modules). Constant sounder. Overrange indicator may be used to provide a third alarm trip. ALARM RESET Alarm circuits when latched may only be reset when the hazard has cleared.
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Page 6: Technical Specification
TECHNICAL SPECIFICATION POWER REQUIREMENTS DC 24v (nominal) operating range 21 to 32v. AC 110, 230± 6% 50 Hz. POWER CONSUMPTION 2.5w per module (normal operating condition). 5W per module (full alarm condition). SENSOR CURRENT 150 to 550mA adjustable constant current drive (no field adjustment required). SENSOR CABLE Catalytic - 3 core 1.5mm - screened, M.I.C.C., S.W.A –... -
Page 7: Installation
INSTALLATION The GDS 2000 Series control instrumentation is designed for installation in a safe area only. Siting of the instrument should be chosen with regard to the following points: (a) away from sources of local heat and with room for adequate ventilation. -
Page 8: Commissioning
Cable ducts, trenches and manholes are also likely places where a build up of heavy gases may collect. When siting a head in such places it is most important to ensure that there is no likelihood of flooding by water, or excessive dust which may block the sintered disc and prevent gas reaching the sensor. - Page 9 CALIBRATION Establish calibration figures with respect to the L.E.L. limit or the T.L.V. limit of the calibration gas being used. The following calibration gases are recommended: Flammable gases - 2.5% methane in air Toxic gases - T.L.V. When using this gas ensure adequate ventilation. If necessary zero each detector channel in clean air (for ambient oxygen monitoring the meter reading should be adjusted to read 20.8%).
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Page 10: Service - Routine Attention
FIRE SENSORS Before applying power to the instrument, ensure that all detector heads are terminated according to Fig 4 page 14 (2 wire loop powered) and at the alarm panel in accordance with connecting detail Fig 3 Page 14. Switch on power to the instrument. Allow ten minutes for the detector head to stabilize. For further instruction see fire sensor supplier manual. - Page 11 TWICE YEARLY MAINTENANCE SCHEDULE All zeros at the control unit to be checked, logged and aligned. Each detector to be gas tested and reading logged (sensitivity checked). Field indicators to be tested. All alarm set points checked and re-aligned. Lamp Test. All faulty parts replaced where required.
- Page 12 T E C H N O L O G I E S SERVICE / MAINTENANCE PLAN GDS Technologies can offer comprehensive maintenance & service cover on all of your gas detection systems. Should you require further details, please complete and fax / return this document for an immediate response.
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Page 13: Table Of Lower Explosive Limits
TABLE OF LOWER EXPLOSIVE LIMITS - L.E.L. The figures quoted below are taken from British Standards Institute publication BS 5354 Part 1: 1976 and show the L.E.L. of some of the more common gases and vapours: L.E.L. % VOLUME Acetone ..................2.1 Ammonia ..................15.0 Benzene .................. -
Page 14: Alarm And Facilities Card Front Panel
Fig.1... -
Page 15: Fig. 2
Fig. 2 ALARM CARD - COMPONENT DETAIL Fuse Sensor supply adjust 20mA output Sensor adjust supply Sensor supply test point 4mA output adjust Inhibit Overrange alarm adjust Hi alarm adjust Lo alarm adjust Accept/Reset Sounder Inhibit Reset Jumper Terminals M - MANDALAatic alarm reset - link 2&3 I - 4-20mA output - link 2&3 (factory set) Y - 24V DC sensor supply - 4-20mA transmitters - link 1&2 X - Adjustable sensor supply - pellistor only - link 2&3... -
Page 16: Alarm And Facilities Card Terminal Connections
Fig. 3... -
Page 17: Sensor Connections
Fig 4 SENSOR – 3 WIRE Gas Detector Detector Head Control Unit mV (pellistors) or 3 wire CV Y SIG Sensor SENSOR – 2 WIRE Gas Detector Control Unit Transmitter Y SIG Sensor INFRA RED SENSOR – 3 WIRE Gas Detector Control Unit Transmitter 24V +... - Page 18 This document is not contractual and the equipment specifi cation may be modifi ed at any time without prior notice. sales@gds-technologies.co.uk 0113 286 0166 0113 287 8178 www.gds-technologies.co.uk GDS TECHNOLOGIES LTD FUSION POINT ASH LANE GARFORTH LEEDS LS25 2GA...
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