Primary And Secondary Air Intake - Siemens FDA241 Planning, Mounting

3.1.5 Primary and secondary air intake

Building Technologies
Fire Safety
Primary air intake
In the case of rooms with an air conditioning unit or ventilation system (4), the
primary air intake (1) is located at the suction point (3) or the suction channel. This
enables rapid smoke detection.
Secondary air intake
When the air conditioning unit or ventilation system is switched off, the smoke is
detected by the secondary pipe system (2).
1
4
1 Primary air intake
2 Secondary pipe system
2
3
3 Suction point
4 Air conditioning unit or ventilation system
System description
Air aspiration variants
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2017-09-12
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