Installing the Detector
3.5
Installation Cables
The following guideline for the cable installation:
•
All cables to the detector must be well shielded in order to comply with EMC
requirement (see Table 21).
•
Ground the detector to the nearest ground point (not more than 3m from the
detector location).
•
Install the detector with the cable entries placed downwards.
3.5.1
Conduit Installation
The conduit used for the cabling must comply with the following:
•
To avoid water condensation or water in the detector, install the detector with
the conduits placed downward to include drain holes.
•
When using the optional tilt mount, use flexible conduits for the last portion
connecting to the detector.
•
For installations in atmospheres as defined in group B of the NFPA 72E, seal
the conduits
’
inlets.
•
When pulling the cables through the conduits, ensure that they are not
tangled or stressed. Extend the cables about 30cm/12
”
beyond the detector
location to accommodate wiring after installation.
•
After the conductor cables have been pulled through the conduits, perform a
continuity test.
