VESDA Pipe Network Installation Guide VESDA by Xtralis
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Generally, a VESDA VLP or VESDA VLS detector should not monitor more than four AHUs, a VESDA VLC
should not monitor more than two, and a VESDA VLF should not monitor more than one AHU.
Legend
A Sampling Pipe
B Return grille
C End cap without a hole
D Sampling hole
Figure 5-10: Sampling over a return air grille
5. Drill sampling holes as specified in the design documents.
6. The pipework must always have an end cap without a hole in it.
5.2.2 Supply Air Sampling
Refer to Return Air Grilles (Section 5.2.1), or use a Duct design (Section 5.2.3).
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