Product Guide VESDA ECO Detector by Xtralis
6 Detector Location 17898_05
In choosing the location for the ECO detector(s) the installer must consider the
following issues
• Aspirator Proximity – When fitted to the inlet pipe of the VESDA detector,
the ECO should be located more than 0.5 m (20 inches) from the VESDA
detector inlet.
• Flow Restriction – When mounted locally to the gas source, i.e. some
distance away from the aspirating device, ensure that there will be
adequate sample flow through the ECO to permit adequate operation.
• Gas Density – The gas to be sampled may be significantly lighter, e.g.
Hydrogen, or heavier, e.g. Hydrogen Sulphide, than air and as such will
gather in higher concentrations in high/low levels within the detection
space, especially areas such as ceiling voids, inspection pits and
stairwells. NB. Training materials are available from Xtralis to provide a
full understanding of the implications of gas characteristics when designing
the installation.
• Cabling – The installer must consider the cabling requirements of the
ECO within the scope of the overall site installation, refer to the Electrical
installation section on page 11.
• Access – The installer must ensure that there is sufficient access to the
ECO detector, i.e. that the indicators can be seen, the cover can be
removed for service and maintenance activities and that there is sufficient
access to the gas test port if it is to be used.
• Mounting – Finding a suitably long straight section of pipe with sufficient
access to fit the body of the detector, without interfering with other
equipment in the location.
• Environment – That the ambient local environment where the unit is to be
placed does not exceed its specification, which must include the
consideration of local sources of heat (e.g. radiators), cold (e.g. freezers),
humidity and EMI (e.g. radio transmitters, electrical installations switching
high currents and/or voltages etc.).
Location of the ECO detector should be pre-planned to take account of all of the
above factors. In existing systems it may be necessary to run additional pipe work
for the benefit of gas detection.
For further information on designing air sampling pipe networks please refer to the
Pipe Network Design and Installation Manuals or contact your local Xtralis Field
Applications Engineer (FAE).
To Next Page
Loading...
