Kidde Fire Protection 400 Series, Design, Installation, Operation, And Maintenance Manual

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General Information
July 2018 1-6 06-237518-001
1-4 SYSTEM DESCRIPTION
Kidde IGS combines an environmentally safe fire suppression Agent, highly effective detection
devices, and specially developed components for fast Agent discharge. The resulting rapid
suppression of a fire reduces property damage and products of combustion to the lowest
possible level. These systems are electrically or manually operated, with a normal design
discharge time of 60 seconds maximum for US Class B fires and EU Class B and C fires. A
discharge time of 120 seconds is allowed for all Class A fires and for US Class C fires. Agent
storage containers can be strategically located throughout a protected zone, eliminating
expensive piping.
Kidde Systems are designed for the following classes of fire:
•
Class A Surface Fires—cellulosic material (wood, paper, etc.)
• Class B–flammable liquids
• Class C (EU)–flammable gases
• Class C (USA)–electrical equipment
For hazards beyond the scope described in this manual, the designer must consult with Kidde
on the suitability of the Agent for the protection, necessary design concentration, and
personnel exposure effects from that concentration. The Agent shall not be used on fires
involving the following materials, unless they have been tested to the satisfaction of the
Authority Having Jurisdiction (AHJ):
•
Certain chemicals or mixtures of chemicals, such as cellulose nitrate and gunpowder, that
are capable of rapid oxidation in the absence of air
• Reactive metals such as lithium, sodium, potassium, magnesium, titanium, zirconium, ura-
nium and plutonium
• Mixtures containing oxidizing materials, such as sodium chlorate or sodium nitrate.
• Metal hydrides
• Chemicals capable of undergoing autothermal decomposition, such as certain organic per-
oxides and hydrazine
A Kidde IGS may involve several elements as described in the following sections.
1-4.1 Central Cylinder Bank
When multiple cylinders are required, Kidde IGS cylinders can be setup in central cylinder
banks with sufficient total capacity to store the required quantity of selected inert agent for the
largest space to be protected. The cylinders in the bank are each connected to a discharge
manifold or series of manifolds via flexible high-pressure discharge hoses. The connection on
the manifold is to a manifold check valve which allows for removal of single cylinders for
maintenance as required, leaving the system in operation without loss of agent through the
connection point should a release of the remaining cylinders be required. Cylinder banks should
abide by the following requirements:
•
Do not locate a cylinder bank where it can be rendered inoperable or unreliable due to me-
chanical damage, exposure to chemicals or harsh weather conditions, or by any other fore-
seeable cause. Where exposure to any such conditions is unavoidable, then a suitable
enclosure or other protective measures must be employed to protect the cylinders.
• The cylinders in a bank shall be securely supported to a wall or other solid structure in a
manner that allows for safe, convenient individual inspecting/servicing.
• Ensure that access to each cylinder valve’s pressure gauge is available for routine mainte-
nance procedures.
Additionally if required by space constraints, one common bank could be split into multiple
groups. However, each group would have to be accounted for in the flow calculation software
and require its own release unit. Where required, a reserve bank shall consist of as many
multiples of the primary supply as the authority having jurisdiction considers necessary. Main
and reserve supplies may be permanently connected to the distribution piping, arranged so
that a safe and easy exchange from main to reserve cylinders can be undertaken.
CAUTION
Electronic main and reserve switches must not be located inside the protected
space.