VESDA VLC-EX Product Guide
VESDA by Xtralis
iv
www.xtralis.com
Regional regulatory requirements and notices
EN54-20
The base VLC detector, as used in the VLC-EX has been tested and approved to EN 54-20.
The product must use a power supply conforming to EN 54-4.
The product is compliant with EN 54-20 sensitivity requirements provided the following conditions are met:
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For a Class A detector, hole sensitivity must be better than 1.5% obscuration/m and transport time less than 60
seconds
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For a Class B detector, hole sensitivity must be better than 4.5% obscuration/m and transport time less than 90
seconds
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For a Class C detector, hole sensitivity must be better than 10% obscuration/m and transport time less than
120 seconds
These limits should be verified using ASPIRE2 during the design of the sampling pipe network.
The product is compliant with EN 54-20 flow monitoring requirements provided the following conditions are met:
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The minor low and minor high flow thresholds should be set at 85% and 115% respectively
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The flow through the detector predicted by ASPIRE2 should be in the range 20 to 65 lpm
Additional information:
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Class A detectors passed EN 54-20 approvals testing with 30 holes and 0.05% obscuration/m detector
sensitivity
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Class B detectors passed EN 54-20 approvals testing with 36 holes and 0.09% obscuration/m detector
sensitivity
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Class C detectors passed EN 54-20 approvals testing with 40 holes and 0.165% obscuration/m detector
sensitivity
Approvals
The VLC-EX contains a standard VLC-EX detector inside an IP rated enclosure so as to meet the particular
requirements of Exn. Refer to the VLC data sheet (Doc no: 09362) for a list of approvals relevant to the standard
VLC. While the performance requirements of the VLC-EX have been verified by Xtralis to be equivalent or better
than the standard VLC, the VLC-EX is not formally listed as a product variant by these agencies.
The base VLC detector, as used in the VLC-EX, has been tested and approved by the following:
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UL
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ULC
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FM
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LPCB
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VdS
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CCC
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ActivFire
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NF (Système de Sécurité Incendie – www.marque-nf.com)
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VNIIPO
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CE
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EN 54-20
Regional approvals listings and regulatory compliance vary between VESDA product models. Refer to
www.xtralis.com for the latest product approvals matrix.
Document: 20755_01
Part Number: 29881
Summary of Contents for VESDA VLC-500-EX
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