End Cap; Holes; Exhaust; Filters - Xtralis ICAM ILS-1 Product Manual

Xtralis ICAM ILS-1 Product Guide

4.4 End Cap

The end of the pipe is terminated with a 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 swarf entering the pipe. Always blow compressed air through the pipe after
drilling to clear any debris before final connection to the equipment. In standard installations, with pipe
hanging from ceiling, the holes should be placed underneath, so the smoke can easily rise up into the
holes.

4.6 Exhaust

In most installations the exhaust should be left open but it may sometimes be necessary to connect pipe
to the exhaust port to divert the exhaust away from the location of the unit e.g. to reduce noise, reduce
risk of interference/deliberate obstruction, improved environmental protection etc.
Pipe of the same specification as the sampling pipe runs should be used and its length limited to a
maximum of 10 m to avoid significant reduction in the air flow. Care should be taken to position the new
exhaust outlet where it cannot be accidentally or deliberately blocked.

4.7 Filters

The sampled air is passed through a filter (order code: FL53) before entering the detector chamber.

4.8 Standard Pipe Configurations

All configurations with maximum pipe length or number of sample holes should have the Alarm (Fire)
threshold set to Level 1 and Fan Speed set to 9. The use of additional bends as described in Section
4.3 will have minimal effect on performance (e.g. response time).
Note: Stated limits are based on EN54-20 certification testing. Reductions in pipe length may allow the
fan speed to be reduced and/or number of holes or alarm threshold level increased. Results of
such changes, or non-standard or unbalanced configurations, should be verified by using Xtralis
ASPIRE2, Pipe Design Program.
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Figure 4-2: End cap with hole drilled in center
Figure 4-3: Filter at the inlet of an ILS system
Xtralis ICAM
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