Chapter 4: Application guidelines
26 Alarmline II Digital Linear Heat Sensor Cable Technical Manual
Three locations are recommended for the sensor cable to provide complete
detection on the conveyor belt.
Table 13: Recommended locations
Problems with friction from a misaligned belt or a seized bearing will
cause an overheat – by placing the sensor cable as close as possible to
the roller bearings the earlier a potential incident can be detected. A
controlled shutdown can be implemented preventing a potential fire
incident. It is recommended that cable is run down both sides of the
conveyor.
If the conveyor is covered it is recommended that sensor cable is fixed to
the canopy above the conveyor belt to detect for any fires on the belt,
enabling a controlled shutdown preventing potential fire spread by the
moving escalator.
It is a recommendation that sensor cable can also be installed
the conveyor to detect any fires that may occur due to trash or
combustible fuel that may have fallen from the conveyor belt.
Figure 4: Sensor cable installation for covered conveyor
The sensor cable should be installed in such a way as to not interfere with
maintenance and to prevent mechanical damage. Fixing clips should be selected
based upon fixing location and available fixing surfaces (most commonly edge
clips have been used to fit to the metal framework of the conveyor).
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