Incite Fire ASD 532, Operating Manual

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Mounting
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5.5.8 Creating the sampling holes
The hole diameters for the sampling holes have to be determi-
ned and created by the customer as described in Sec. 4.4.4.4
and according to the specifications of the “ASD PipeFlow” cal-
culation software or according to Sec. 0.
The sampling holes must be drilled cleanly so that no burrs or
pressure points result. Use “new” drills with correctly ground
surfaces (
Fig. 25 ).
Whistling noises are a sign that the holes have not been
neatly drilled. If so, the holes should be re-drilled and/or de-
burred.
For space surveillance, the sequence of hole diameters set
out in Sec. 4.4.4.4
and the specifications of the
“ASD PipeFlow” calculation software must be observed
strictly.
If required, the sampling holes can be made using the special
“sampling hole clips” (see 5.5.9).
Fig. 25 Creating the sampling holes
For equipment monitoring, the sampling holes are drilled in the sampling fixture. The sampling holes are drilled into the sam-
pling fixture in the direction of the air outlet from the object to be monitored. If required, these sampling holes can be fitted with
sampling funnels (Sec. 5.5.10).
5.5.9 Mounting the sampling hole clips and maintenance clips
Possible only with plastic tubes (PVC/ABS)!
At each required position in the sampling pipe drill a hole 8.5
mm in diameter (uniform Ø). The holes are made at right an-
gles, in the centre of the pipe axis (as shown in
Fig. 25 ).
The sampling hole clips are available in various sizes
(Ø 2.0 / 2.5 / 3.0 / 3.5 / 4.0 / 4.5 / 5.0 / 5.5 / 6.0 / 6.5 / 7.0 mm).
To determine the required sampling hole clips, refer to
Sec. 4.4.4.4 and the specifications of the “ASD PipeFlow” cal-
culation software or Sec. 0.
The sampling hole clips and the maintenance clips are clipped
onto the sampling tube so they snap into the 8.5 mm borehole,
Fig. 26 .
Fig. 26 Mounting clips
5.5.10 Mounting the sampling funnel
Possible only with plastic tubes (PVC/ABS)!
For equipment monitoring objects with a high air-flow rate
(strong ventilation), the sampling holes can be fitted with fun-
nels for optimal smoke detection.
If forced ventilation is used in rooms and/or on equipment, the
use of sampling funnels is imperative.
The sampling funnels are secured to the tube of the sampling
fixture and adjusted to the previously drilled sampling holes as
described in 0 (see
Fig. 27 ).
Fig. 27 Using sampling funnels
Angled hole
Pressure points
Burrs
wrong
correct
Hole not at
pipe centre
If whistling noises,
deburr or countersink
Sampling hole
Sampling
hole
clip
Maintenance
clip
Maintenance
sampling hole,
Ø 8.5 mm
Hole,
Ø 8.5 mm
PVC or ABS
sampling tube
Screws,
M4 x 25
Click pipe clamp
Top part
of funnel
Tube of
sampling fixture
Sampling hole
Bottom part
of funnel Funnel
opening
Funnel opening
Sampling funnel
Support rail
ASD532 Operating Manual