Ampcontrol gasguard, Installation, Operation & Maintenance Manual

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GASGUARD IS CONTROLLER Issue: R2, Date: 26/09/2011, CRN: 7502
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5
Controller Installation
5.1 Ensuring Safe Installation
The Controller requires to be installed into a system along with appropriate devices providing input signals (sensors)
and output control/indication (fan controls, beacons, sirens, SCADA systems etc.).
Before the Controller can be installed, there are a number of things that need to be considered and understood to
prevent incorrect or unsafe operation of the Controller or the system into which it is installed.
Along with relevant competence, and an understanding of the target application, the following points should be
considered:-
5.1.1 Ensure that the information provided in sections 2.3 and 2.4 is fully understood.
It is extremely important that the limitations of the controller are understood to prevent incorrect
installation and use from creating a potentially dangerous risk. If in doubt as to the nature of the
limitations or their implication, consult a competent authority such as a supervisor or Ampcontrol
applications engineer.
5.1.2 Ensure that the information in sections 2.6 to 2.9 is understood. Specific attention should be
paid to the highlighted notes regarding incorrect Controller settings.
It is extremely important that the functionality of the controller is understood to prevent incorrect
configuration creating a potentially dangerous risk. If in doubt as to the nature of the limitations or their
implication, consult a competent authority such as a supervisor or Ampcontrol applications engineer.
5.1.3 Ensure that the application into which the Controller is being installed has been properly
defined, approved and designed.
Any system intended to mitigate the risk of injury needs to be properly designed and implemented. Such
a system must be the result of structured risk analysis with the outcomes used to define the system
requirements. These requirements, in turn, will guide the choice of instrumentation, logic solvers and
actuators needed to implement the system. Understanding the needs of the system will ensure proper
selection of equipment.
5.1.4 Ensure that the Controller will properly perform the required functions within the system design.
It is important to understand how the Controller is intended to interact with other equipment within a
system. For safe and reliable use, it is crucial that neither the Controller’s logical operation nor its
signalling be compromised by incompatibilities with connected equipment.
5.1.5 Ensure that the intended devices to be connected to the Controller are compatible with the entity
parameters as specified on the Controller’s certificate of compliance (conditions of safe use).
Check the terminal parameters of all devices intended to be connected to the Controller against the
Controller’s certificate of conformance. If in doubt, consult a competent authority, or contact an
Ampcontrol applications engineer.
CAUTION!
The user is responsible for maintaining the Ex ia Intrinsic Safety rating by complying with
the “List of Special Conditions” outlined in the certificate ( Appendix C – Approvals ).