TM0110 Page 10 of 22 Issue 1.00
CHAPTER 3
INSTALLATION AND COMMISSIONING
3.1 GENERAL
Installation of the fire detection and alarm system must comply with all applicable national and local
regulations, standards and working practices.
Take care not to install cables in the proximity of high voltage cables or in areas likely to induce
electrical interference. Junction boxes should be avoided, but if they have to be installed then they
must clearly be labelled "Fire Alarm". Refer to Figure 4 for the External Wiring Diagram.
It is recommended that screened cables be used throughout the installation. All cables must be
stripped in accordance with the manufacturer's guidelines. They must be secured to the enclosure
using appropriate metal compression glands and metal locking nuts in conjunction with a metal shake
proof washer to ensure that the cable metal sheath is bonded to the enclosure.
The cabling for the detection and sounder circuits is classed as low voltage and should be segregated
from mains voltages. The pre-formed knockouts shown in Figure 5 must be carefully removed, where
required, using a flat broad-bladed screwdriver and hammer. Use of excessive force should not be
required and may damage the enclosure around the knockout. The surrounding paint must be
carefully removed to permit metal to metal contact between the enclosure and cable gland.
The total current supplied by the panel power supply is 2.5A, which is shared by the auxiliary alarm
devices, common fire and fault output devices and auxiliary 28V supply peripherals. Panel load
calculations MUST not exceed 2.5A.
WARNING
The static handling procedures must be adhered to and extreme caution must be exercised
when working inside the control panel due to the presence of mains voltage 230 V AC.
Static Sensitive Devices
A static sensitive device is any transistor or integrated circuit that may be permanently damaged due
to electrostatic potentials and is generally encountered during routine handling, repair and
transportation.
Static electricity is produced almost every time plastics or textiles are stroked or separated. Static
charges are collected on adjacent conductors and are delivered in the form of sparks passing
between conductors through insulating space or material. The perspiration layer on the human skin is
a sufficient medium to store induced static charges and deliver them to any receptive conductor such
as a component or printed circuit board.
All static sensitive devices are marked accordingly, but it is good
engineering practice to treat all components and boards with the
same degree of protection.
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