8
October 2010
AUTOMATIKPRODUKTER
AUTOMATIKPRODUKTER
ATEX – Duct Smoke Detector
4
Project planning
The Duct Smoke Detector LRS 04 Ex is designed for application in rectangular
ventilation ducts of 0.5 m to 1 m in diameter. In ventilation ducts with a round
cross section, application is possible for Ø from 0.2 m to 1 m. The detection
range to the side of the inlet tube in the channel is approx. 500 mm. The air
channel base must be positioned such that reliable smoke detection can be
assumed. Any interference factors that may impair safe functioning of the LRS
04 Ex must be ruled out. If required, the length of the inlet tube must be
adjusted accordingly, see chapter 9 Installation.
Fig. 4-01
A recommendation for project planning is provided in Fig. 02.
In order to ensure reliable smoke detection in larger channels several LRS 04 Ex
should be used. In doing this, the parameters of the ventilation duct with regard
to monitoring of the centre of the air flow must be observed.
Fig. 4-02
Direction of air flow
A1: Ideal operating environment
A2: Increased dust load
B: Area not suitable for early smoke detection
Hydraulic diameter
