Xtralis ICAM ILS-2, Руководство по эксплуатации продукта

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ICAM ILS-2 Product Guide ICAM by Xtralis
12 www.xtralis.com
4.4 End Cap
A
B
Legend
A End Cap
B Sampling Hole
Figure 4-2: End cap with hole drilled in center
The end of the pipe is terminated with an end cap, usually with a hole drilled in its center. If the end cap is not
used, then almost no air will be drawn through the side holes. The end cap can be considered a sampling point
if required.
4.5 Holes
The sampling pipe is perforated with sampling holes and can be drilled before or after installation. Care should
be taken to avoid debris entering the pipe. Always blow compressed air through the pipe after drilling to clear
any debris before final connection to the equipment.
Notes:
l
The installer can drill the required holes in the sampling pipes either prior to or during installation, as per
the sampling pipe network design.
l
In standard configuration, with pipe hanging from ceiling, holes should be placed underneath, so the
smoke can easily rise up into the hole.
l
It is important that the correct diameter sampling holes be drilled, as this affects system performance and
efficiency.
l
Sampling holes must be drilled at 90 degree angles to the pipe.
l
Attach adhesive labels to identify the sampling points.
4.6 Exhaust
In most installations the exhaust should be left open. However, in some cases it may be necessary to
connect pipe to the exhaust port to divert the exhaust away from the location of the unit. Examples include
noise reduction, risk of interference/deliberate obstruction, improved environmental protection and pressure
equalization.
Where the ICAM ILS-2 is located outside the protected area, consideration must be given to returning the
exhaust air to the protected environment to balance pressure differences that may exist between the two
areas. In the majority of applications, this is not necessary as pressure differences are minimal.
Examples of where the exhaust should be returned to the protected area include:
l
where pressure differences exceed 50 Pa from where the detector is located outside the protected area.
l
where there are hazardous substances inside the protected area, for example hospital operating theaters,
laboratories.
Pipe of the same specification as the sampling pipe runs should be used and its length limited to a maximum
of 30 ft (10 m) to avoid significant reduction in the airflow. Care should be taken to position the new exhaust
outlet where it cannot be accidentally or deliberately blocked.
Return air pipes need to be as short as possible to minimize the effect of airflow resistance in the return air
pipe network.