October 2,
2012
XTRALIS VESDA LASER INDUSTRIAL (VLI) – QUICK SETUP TECHNICAL GUIDE
For internal use only Authored by: Manuel Espaillat
2
Design Review
The design of VLI pipe networks in ASPIRE2 should have taken the following recommendations into consideration:
•
Utilize at least two pipes in the design (Pipe 2 and Pipe 3 recommended when only using two pipes) with a
pipe flow rate of at least 25+ ltr/min and a detector flow rate at least 50+ ltr/min as per ASPIRE2 , use higher aspirator
speed setting if required.
•
Ensure that for single pipe installations ASPIRE2 pipe flow rate is at least 50+ ltr/min, use a higher aspirator
speed setting if required.
•
Exhaust pipes (ASPIRE2 calculations are not needed) unless there is substantial pressure differential where
the exhaust pipe needs to go back to the sampling area, keep the exhaust pipe length at a minimum.
•
Connect the VLI to the installed pipe network, select relevant pipes in use through VSC, block pipes not in
use and ensure that the exhaust is not blocked.
Installation
VLI is often applied to harsh/extreme industrial environments, some key things to remember would be:
•
Countersink sampling points whenever possible to aide in preventing particulate/contaminant build up
around pipe sampling holes. Please refer to the “
Counter-Sinking Holes (VLI) Application Note”
(doc number
19782_01).
•
If the VLI is installed inverted (upside down) to prevent water condensate from reaching or affecting the VLI
internal components, please refer to the
“Removal of Water Condensate Application Note”
under the section
“Water Condensate Removal – Water Trap”
(doc number 17405_01).
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