Dräger Flame 5000 Instrucciones De Uso página 12

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Installation
For further information see: "Technical data", page 14.
3.3 Installation check-points
3.3.1 Mechanical installation
● When locating the Dräger Flame 5000 consideration should be given to
maintenance access to the detector and should allow for easy detector
removal for maintenance or repair.
● The detector mounting should be secure and vibration free. It is advisable to
check the detection locations, prior to fabrication of the mounting supports,
as changes are frequently made during construction at site which can affect
detector coverage.
● The detector should be fixed to a stable supporting structure using the
mounting bracket provided. The supporting structure must allow for
horizontal adjustment of the detector orientation. The support structure
should be in place prior to detector installation.
● The threaded flame path of the enclosure cover and body must be protected
from damage during installation. Any such damage can destroy the validity
of the enclosure.
● The detector electronics shall be protected from mechanical damage and
external sources of EMI such as X-rays, RFI and electrostatic discharge.
● Fit the mounting bracket to the support structure using 8 mm bolts (not
provided). The detector (bracket) should be oriented to provide the desired
coverage.
● The hex head bolts should be fitted to the enclosure body prior to mounting
to the bracket. The detector enclosure body should then be fitted to the
mounting bracket. The bolts fit into key slots in the bracket. Twist the
enclosure to locate the bolts; these are then tightened using a 6 mm Allen
key.
3.3.2 Electrical installation
In order to maintain compliance with the EMC regulations it is essential the
electrical installation be engineered correctly.
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● It is advisable to check the detection locations, prior to fabrication of the
mounting supports, as changes are frequently made during construction at
site.
● Detector cabling must be segregated from cables carrying high-speed data
or high-energy and/or high-frequency signals and other forms electrical
interference.
● The detector requires a clear unobstructed view of the local hazard. In order
to avoid local obstructions, such as pipe-work and cable trays, a 2 m
(6.56 ft) helix should be allowed in the detector cabling.
● The detector should only be installed just prior to commissioning.
Experience shows that the detector can be damaged due to cable testing
operations (Insulation Tests, etc).
● Isolate all associated power supplies. Ensure that they remain OFF until
required for commissioning.
● The electronics subassembly shall be protected from mechanical damage
and external sources of EMI such as X-rays, RFI and electrostatic
discharge.
● The enclosure's external earth stud should be connected to a local earth
point.
● Remove the blanking plug(s) from the enclosure body gland entries.
● Fit approved cable glands using sealing washers to maintain ingress
protection.
● Prepare the cable tails. The cable screens should be cut back to the crotch
at the detector and insulated from contact with the enclosure or any other
local earth. The twist in each pairs should be maintained to within 1"
(25 mm) of the termination. Cable tails should be 8ʺ (200 mm) long.
● Where plastic junction boxes are used, the cable screens (shields) should
be maintained to within 1ʺ (25 mm) of the termination and fully insulated.
● Where unscreened cables are used for panel wiring, then all cables must be
suitably twisted into pairs and video cables should be segregated from other
signal sources.
● All cable screens (shields) should be connected to the local clean earth at
the control panel. The screens and twisted pairs should be maintained to
within 1ʺ (25 mm) of the terminations.
Instructions for use |
Dräger Flame 5000