
This installers guide is intended for the use of system specifiers, surveyors, designers and installers.
The intention of this guide is to provide information for the correct installation of IGD’s range of 2-Wire
gas detection systems. This guide indicates correct cabling practice, types of cabling which can be
used and options available to correctly design and install a 2-wire gas detection system. This guide is
not intended as a design or specification guide, these are available separately.
Note that System control panels, detector nodes, battery backup modules and power boosters are all
supplied with their own manuals. Their general specifications and performances are available both in
their individual manuals and published data sheets. This data is not reproduced in this guide.
Failure to follow this installers guide could compromise operation of the 2-Wire gas detection system
so please follow the enclosed information carefully.
Systems should be designed and installed by competent persons. A competent person being defined
by the UK Health and Safety Executive as:
A competent person is someone who has sufficient training and experience or knowledge and other
qualities that allow them to assist you properly. The level of competence required will depend on the
complexity of the situation and the particular help you need.
IGD’s gas detection systems are capable of installation by electrical installation engineers. Design of
a system is not covered in this guide and should be undertaken by a competent person. The design
should include:
The Nature of the Gas Hazard and Appropriate Placement of Detectors
Clear Indication to workers That a Gas Hazard Exists and the Action They Must Take
Interaction Between the Gas Detection System and Other Systems
The Necessary Safe Operating Procedures That Must be in Place
IGD can provide help to design systems where help is required and can also provide training for
surveyors, specifiers, designers and installers.
All Gas Detectors shipped from IGD are pre-calibrated. It is not always necessary to re-calibrate a
newly installed system on site but it is recommended that commissioning is undertaken.
Commissioning should be undertaken by persons trained to do so. Commissioning should ensure that
the system performs and interfaces correctly to all connected devices, host systems and operates to
the required cause and effect.
IGD are available to answer question using our on-line ticketing system available through our website.
NOTE that ATEX equipment has specific requirements for cable protection and glanding to housings.
These requirements are detailed in manuals for such equipment available through our website.
INTRODUCTION
Summary of Contents for TOC-635
Page 4: ...SECTION 1 MOUNTING DETAILS FOR EQUIPMENT...
Page 10: ...SECTION 2 SITING GAS DETECTORS...
Page 17: ...SECTION 3 GENERAL CABLING PRINCIPLES CABLE TYPES AND CABLE SIZING...
Page 24: ...SECTION 4 MAKING DEVICE CONNECTIONS TO DETECTOR NODES...
Page 43: ...SECTION 5 Control Panel Interfaces and Connections...
Page 67: ...Notes...