© 2003 Tyco Safety Products PAGE 3 of 14
I.S. SYSTEM 800
17A-13-I
11/03
EQUIPMENT:
PUBLICATION:
ISSUE No. & DATE:
SYSTEM 800 - INTRINSICALLY SAFE MX ADDRESSABLE FIRE DETECTION
SYSTEM
INSTALLATION INSTRUCTIONS
1. INTRODUCTION
This manual details the information required to install the
Intrinsically Safe MX Addressable Fire Detection System
designed by Thorn Security Limited.
The control equipment of the Fire Detection System must be
connected by Isolating interfaces to System 800 only.
An Isolated Sounder System is available for use with System
800.
Note: In the I.S. manual for System 800, the words
‘Isolating Interface’ and ‘Galvanic Isolator’ are
equivalent and interchangeable.
System 800 also requires an EXI800 Interface Module which is
connected between the control equipment and the Safety
Barrier.
2. GENERAL
WARNING:
THE DESIGNED SYSTEM DOCUMENTATION MUST
BE READ AND UNDERSTOOD BEFORE ANY WORK
IS PERFORMED. THERE IS A POSSIBILITY THAT A
HAZARD EXISTS OR WILL OCCUR DURING
INSTALLATION. ALL
APPROPRIATE SAFETY
PRECAUTIONS MUST BE ADHERED TO AT ALL
TIMES
. ALL RISKS SHOULD BE DOCUMENTED.
The installation of I.S. systems must be carried out by suitably
trained Thorn Security Limited engineers.
It is important that I.S. systems designed, installed,
commissioned and serviced by Thorn Security Limited
personnel fully conform with all conditions specified in BS EN
60079-14:1997 (CP for the selection, installation and
maintenance of electrical apparatus for use in potentially
explosive atmospheres).
The complete fire detection system must meet all BS5839 Pt. 1
requirements except when overridden by any special
requirements within the Hazardous Area.
The installation should be performed in such a way as to avoid
external damage to the apparatus and insulation which would
impair the integrity of the designed system.
Wiring should be installed, as far as is practicable, in positions
that will prevent exposure to mechanical damage, the effects of
heat and corrosive or solvent substances. Where such
exposure cannot be avoided, protective measures must be
taken.
All apparatus and connections should be clearly marked in
order that their usage/relationship to other devices can be
readily recognised.
All isolating I.S. interface units and isolating sounder drivers
must be sited in a Safe Area (ie, an area with no definable
hazard). Isolating I.S. interfaces and isolating sounder
drivers if used exclusively in floating systems do not require a
High Integrity earth but require a local earth for cable screens.
Note: Where there is a need to site the safety barriers in
a Hazardous Area because of cable length
limitations, the barrier must be housed in either
an ‘N’ type (Zone 2 only), or Flameproof (Zone 1
or 2) enclosure which are certified for this
purpose. In no circumstances must these
enclosures be used in a Zone 0 environment.
3. CERTIFICATION REQUIREMENTS
The Intrinsically Safe systems used for the protection of low
voltage fire detection systems produced by Thorn Security
Limited have been certified category ‘ia’ by the British
Approvals Service for Electrical Equipment in Flammable
Atmospheres (BASEEFA).
• System 800 can be used for a Gas Group IIC
hazard in a Zone 0, Zone 1 or Zone 2 environ-
ment.
• Sounder System (BASEEFA Ex872028) can be
used for a Gas Group IIC hazard in a Zone 0,
Zone 1 or Zone 2 environment.
For information on Gas Groups and Zones refer to document,
26A-01-G1 - Use of Electrical Equipment in Fire Detection
And Extinguishing Systems for Protection of Hazardous
Areas.
3.1 SYSTEM 800
This system provides an Intrinsically Safe fire detection circuit
to category ‘ia’ for gas group IIC in Zone 0, Zone 1 and Zone
2. The equipment which can be installed is as follows:
www.acornfiresecurity.com
www.acornfiresecurity.com
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