VESDA VLI Product Guide
VESDA by Xtralis
iv
www.xtralis.com
Regional Regulatory Requirements and Notices
UL
For open area protection the fire alarm threshold (signal) that initiates an evacuation procedure via the Fire
Alarm Panel must not be set less sensitive than 0.625%/ft. The detector can send this signal via the Fire
Alarm Panel Output signal or the Pre-alarm output signal.
Through validation testing, Underwriters Laboratories Inc. has verified that VESDA ECO gas detectors, when
installed within the sample pipe network, present no significant effects on the smoke detection performance of
VESDA. The use of the ASPIRE2 calculation software is required to verify system design performance with
all devices included in the design.
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:
The minor low and minor high flow thresholds should be set at 85% and 115% respectively
Additional information:
VESDA VLI was successfully tested and passed the EN 54-20 fire tests with the following configurations:
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Class C with 64 holes and a Fire-1 setting of 0.15% obscuration/m
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Class B with 28 holes and a Fire 1 setting of 0.15% obscuration/m
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Class A with 24 holes and an Alert setting of 0.06% obscuration/m
Note:
These configurations were chosen to illustrate the maximum capability of the VESDA VLI in terms
of number of holes and sensitivity in a clean environment and necessitated the use of holes with a
diameter less than 3mm. As stated in Section 4.1, for industrial applications with high background
levels, hole sizes of less than 3mm should be avoided. Thus, the maximum number of holes may
not be realizable in some applications.
In all applications an ASPIRE2 design must be prepared to meet appropriate EN54-20 sensitivity transport
time targets, taking into consideration all factors including any local codes and standards for maximum
transport times.
Product Listings
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UL
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ULC
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ActivFire
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LPCB
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CE - EMC and CPD
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EN 54-20
Regional approvals listings and regulatory compliance vary between product models. Refer to www.xtralis.com for
the latest product approvals matrix.
Document: 18500_A2
Part Number: 29674
Содержание VESDA VLI
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