VESDA® Test Transformer (VTT-100)
Contents
1. inhaling the smoke plume as it contains small quantities of HCI The wire burn tests particularly the 1m and 2 x 1m tests produce sufficiently high temperatures to generate small quantities of hydrogen chloride However test personnel are unlikely to be exposed to concentrations of hydrogen chloride that exceed the Occupational Exposure Standard OES of 5ppm in a 15 minute period unless they are directly exposed to the smoke plume VESDA VTT 100 User Manual It is strongly recommended that personnel wear appropriate protective equipment such as an E1 respirator confirming to EN140 and goggles without ventilation conforming to EN166 under the following situations It is impractical to perform remote switching of the transformer Multiple tests are required Personnel are within the immediate vicinity e g 2m of the smoke source Due to the nature of Hot Wire tests there is a minor fire hazard It is strongly recommended that an appropriate type of fire extinguisher e g CO or dry powder is available during the test It is the responsibility of the person carrying out the tests that the electrical equipment used is maintained at all times for safety In particular check that the supply voltage selector is set appropriately the correct fuse is fitted for the selected voltage and that a power cord with suitable local approvals is used If in doubt please seek guidance from a suitably qualified electrician2. 3 0 Equipment Set Up CAUTION Ensure that the mains input voltage selector is set to suit the supply voltage and the fuse fitted has the correct rating If the voltage selector does not match the supply voltage in use then do the following 1 Turn the unit off and disconnect the power supply cord 2 Using a screwdriver undo the screws that hold the transparent cover in place and remove the cover 3 Select the correct voltage to match your supply on the selector switch 4 Replace the transparent cover and redo the cover screws If the fuse is not the correct rating for the supply voltage in use then do the following VESDA VTT 100 User Manual 1 Turn the unit off and disconnect the power supply cord 2 Eject the fuse drawer 3 Remove the existing fuse and replace with one of the correct rating See below 4 Reinsert the fuse drawer The timer must be in mode A with the scale set to min minutes and the scale showing from 0 to 3 maximum of three minutes operation The timer should appear like this If the timer does not match this picture then do not operate the unit Contact VESDA support to resolve this issue It is recommended to confirm the accuracy of the burn period using a stopwatch and a suitable multimeter connected to the output terminals before conducting any live tests If this is necessary seek guidance from a suitably qualified electrician Remotely switching
3. UK United Kingdom VTT 10000 EUR Europe VTT 10000 USA United States 251 001 Test Wire 100m length The wire has the following technical specifications 10 0 1 mm strands insulated with PVC to a radial thickness of 0 3mm and the cross sectional area of the conductor being 0 078mm All parts can be ordered from your local VESDA distributor Further Information Contact your nearest Vision Fire amp Security office or distributor for further information
4. VESDA VTT 100 User Manual Australia and Asia Vision Fire amp Security Private Bag 215 495 Blackburn Road Mount Waverley VIC 3149 Australia Ph 61 3 9211 7200 Fax 613 9211 7201 Free Call 1 800 700 203 The Americas Vision Fire amp Security 700 Longwater Drive Norwell MA 02061 USA Ph 781 740 2223 Toll Free 800 229 4434 Fax 781 740 4433 Europe and the Middle East Vision Fire amp Security Vision House Focus 31 Mark Road Hemel Hempstead Herts HP2 7BW UK Ph 44 1442 242 330 Fax 441442 249 327 www vesda com This document may not be reproduced in whole or in part by any means without the prior express written permission of the copyright owner Copyright 2003 Vision Fire amp Security Pty Ltd A C N 008 009 514 The manufacturer reserves the right to change designs or specifications without obligation and without further notice VESDA LaserTEKNIC LaserPLUS LaserSCANNER LaserCOMPACT LaserFOCUS VESDAnet VESDAlink ASPIRE AutoLearn VSM VConfig InfoWORKS PROACTIV PRECISION and VSC are trademarks used under licence by the distributor PO Part No 20333 Revision No 03 Vision Systems VESDA Test Transformer VTT 100 Test Transformer Guide Private and Confidential February 2004 VESDA VTT 100 User Manual VESDA VTT 100 User Manual Table of Contents 1 0 Introduction 2 0 Preparation and precautions 3 0 Equipment Set Up 4 0 Preparation and connection of the test
5. d the wire from the airflow WARNING At no time is it appropriate to open the VTT 100 There are no user serviceable parts inside VESDA VTT 100 User Manual 5 0 Smoke Test Ensure that the local fire panel is isolated from the external fire reporting equipment and that any automatic extinguishing or suppressant systems are similarly isolated Connect power to the VTT 100 and turn the switch on At this point there is 6VAC applied across the test wire the switch will illuminate and the green indicator on the timer will begin to flash The test wire will become hot and a small quantity of smoke will be generated WARNING The test wire becomes very hot during the test and will cause burns if held in the hand Care must be taken throughout this test process Turn the unit off after the timed burn period is complete Smoke shall be generated and the time for the detection should be recorded to ensure that transport and alarm times are within the local regulatory requirements 6 0 References Note that appropriate guidance should be noted to the local and applicable standards and regulations such as the following BS5389 Part1 2002 BS6266 1992 BS6266 2002 which cross references to the BFPSA Code of Practice NFPA 76 2002 BFPSA Code of Practice for Category 1 Aspirating detection systems Appendix A This Appendix is published on the BFPSA website at www bfpsa org uk BFPSA British Fire Protection Systems Assoc
6. iation VESDA VTT 100 User Manual 7 0 Specification Type VTT 10000 Voltage Input 220 240VAC 50Hz or 110 120VAC 60Hz Input Rating 800mA 240VAC 50Hz 1 6A 120VAC 60Hz Fuse 220 240VAC 800mA T Anti surge 110 120VAC 1 6A T Anti surge Output 6VAC nominal 20A Operating Time Maximum on time 3 minutes 180 seconds Minimum off time between tests 7 minutes 420 seconds Protection IP30 Indoor use only This product is not to be used in the presence of moisture 8 0 Compliance Safety EN 61558 1 1997 Safety of power transformers power supply units and similar EN 61558 2 6 1997 Particular requirements for safety isolating transformers for general use EMC EN 50081 1 EMC Generic Emissions EN 50082 1 EMC Generic Immunity FCC Part 15 Class A Emissions For users in the USA This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation For users Europe Australia and or New Zealand Warning This is a class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures VESDA VTT 100 User Manual 9 0 Ordering Information VESDA Part Numbers e VTT 10000 VTT 10000 AUS Australia VTT 10000
7. power to the VTT 100 from the mains outlet can assist in the reduction of possible smoke inhalation by personnel Applicable code wire burn recommendations VESDA VTT 100 User Manual BS6266 1992 recommends a burn time of 60s for one metre wire lengths and 180s for 2 metres e The NFPA 76 code also recommends the same tests with an additional test with a burn time of 60s using 2 x 1m wires connected in parallel 4 0 Preparation and connection of the test wire The test wire samples should be carefully measured and cut to the required length The ends should be stripped at approximately 15mm using a suitable tool If in doubt please seek guidance from a suitably qualified electrician WARNING Only use the recommended test wire Under no circumstances should test wires be shorter than 60cm or 2x1m in parallel This is likely to age or blow the inlet fuse and may cause an unnecessary inconvenience Ensure that no power is connected to the VTT 100 Insert the test wire between the output terminals and lay it on a supporting non combustible platform It is important to ensure that there are no cross overs of the wire It may be helpful to first coil the wire using a pen or pencil as a temporary former and then lay it out Alternatively an arrangement to support the wire may be used with the precaution of a fire blanket positioned beneath the wire If the equipment is in a high airflow area then it may be required to shiel
8. tive The unit must be operated for no more than three 3 minutes continuously and must be left off immediately after operating for a period of at least seven 7 minutes to allow it to cool Note The unit is protected against over temperatures by a thermal switch Once tripped the thermal switch will not allow operation for an extended period up to an hour regardless of power being present or not The thermal switch cannot be bypassed or reset manually VESDA VTT 100 User Manual Vision Fire amp Security Vision Systems VESDA Test Transformer Modal VTT10000 SN 904238 016 aput 0 60 hz LSATSOnA Part Number VTT 10000 2 0 Preparation and precautions When performing a hot wire test ensure that local standards and regulations are understood and have been adhered to where applicable Also ensure that the VESDA detection equipment being proved tested is isolated from both the local fire authority notification alerts and any suppressant actioning devices WARNING The hot wire test is intended to trigger a response from the Aspirating Detector under test ensure that the consequences of this activation are understood and under control Precautions must also be taken to ensure that all people present are aware that the test is being conducted and that those who are required to remain in the immediate vicinity of the test are suitably attired for the smoke levels about to be created WARNING Avoid
9. wire 5 0 Smoke Test 6 0 References 7 0 Specification 8 0 Compliance oN ND DO OW N 9 0 Ordering Information VESDA VTT 100 User Manual 1 0 Introduction This Guide describes the use of the VESDA Test Transformer VTT 100 previously known as the Hot Wire Test Power Supply Unit PSU to test very early warning aspirated smoke detection equipment The unit provides 6VAC output from 220 240VAC or 110 120VAC mains supply High current is passed through a test cable in order to heat it which causes its insulation to burn giving off smoke A timer is incorporated to provide a selectable burn period of up to 3 minutes Note The timer also helps to prevent the unit being inadvertently left on for an extended period The unit must never be left on and unattended The rocker switch on the top of the unit is the on off switch When power is applied and the unit is turned on the green POWER indicator on the timer flashes and power is applied to the output terminals until the set time has elapsed Once the timer has timed out the output is switched off and the red OUT indicator on the timer illuminates The POWER indicator then stops flashing and remains illuminated The timer is reset when the switch is turned off and will run for the full selected period when the switch is turned on again Note The on off switch may be illuminated while the unit is switched on This is not an indication that the output is ac
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