VDOT-ASD-100 Aspiration Detector
Velocity Detection
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VDOT-ASD-100 Aspirating Smoke Detector User’s Manual V1
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Clean the sampling pipework
a.
The sampling point can be cleaned using a proper tool (e.g. a tooth pick or sharp needle)
to remove the dust build up on the sampling hole.
b.
To clean the capillary tube, it can be removed from the pipe and use compressed air to
blow the dust away.
c.
To clean the whole sampling pipework system, a sampling pipe must be removed from
the pipe inlet and introduce high airflow providing by a compressor into the sampling
pipe to blow off the dust in the pipework and the sampling holes. Alternatively, to ease
the maintenance, a three ways valve can be installed before the pipe inlet so that a
maintenance inlet is provided on the three ways valve. In normal operation, the valve is
switched to connect the sampling pipe and the detector pipe inlet. In maintenance
occasion, it is switched to connect the sampling pipe and the maintenance inlet so that
the high airflow can be introduced to the maintenance inlet directly.
