17
MAN0530 Issue 09 October 03 Searchline Excel
2104M0506
The beam path and immediate surrounds should be kept free of obstructions that might hinder the free
movement of air in the protected area or block the infrared beam. A clear beam path of 20cm diameter or
greater is recommended. In particular, for optimum availability, avoid areas affected by the following.
a. Steam vents and plumes
b. Smoke stacks and chimneys
c. Walkways and personnel areas
d. Splash and spray, e.g. from moving equipment, cooling towers, etc.
e. Parking, loading, cranes, vehicle temporary stops, e.g. bus stops, road junctions, etc.
f. Vegetation, e.g. shrubs, bushes, branches, etc. - if currently clear, movement due to
weather and future growth or planting must be considered
Note: Where c. and d. cannot be avoided, consider indicating the beam by marking the walkway
or road with paint.
Unit cowl
Telescope
clearance arc
-radius more
than 30cm
Beam
clearance arc
-radius more
than 10cm
Notes:
1. In order to fit the alignment telescope, used during the alignment process, a clear
accessible arc of at least 30cm radius is required close to the unit’s cowling as shown.
2. A clear beam path of at least 10cm radius or greater is recommended.
3. INSTALLATION AND OPERATION
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