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Note. Certain materials in this group may require
increased concentrations to achieve satisfactory
extinguishment. Consult the technical support
centre for details of specific risk.
Caution.
FM-200
®
is not effective on the following: -
Class A Deep seated fires��
Class D Combustible metals��
Chemicals capable of auto-thermal recomposition��
Chemicals capable of rapid oxidation��
Enclosures with hot surfaces (>400 °C) (752 °F)
Hazard Structure
The protected enclosure shall be bounded by rigid
elements of building construction�� The ceiling should be
not less than 0��3 m (1�� ft) above the hazard��
During agent discharge, the hazard enclosure will
experience a pressure change�� Consideration should be
given to mitigating these pressure changes��
•
•
•
•
•
Hazard Volume
In total flooding applications the risk area must comprise
an enclosed space with no significant openings so that the
design concentration can be achieved and maintained��
Generally, the calculation is based on an empty area;
the subsequent furniture and fittings having little effect
on the actual concentration�� Similarly, large equipment
cabinets and control panels should not be considered in
the calculation as it is assumed that the internal area is
required to be filled with agent��
Each enclosed space is considered as a risk area and
requires at least one nozzle�� A floor void, ceiling void,
cable duct, etc��, is treated as a separate adjacent area and
requires simultaneous discharge to occur��
Ceiling obstructions such as beams that are less than
300 mm (12
”
) below the slab need not be considered��
Obstructions greater than 300 mm (12
”
) can affect the
distribution of agent and may require additional nozzles��
Consult the technical support centre if in doubt��
To determine the volume refer to the site drawings,
ensuring that the scale is accurate and that heights are
denoted, or make a sketch of the area adding dimensions
and any relevant details�� Calculate the volume of each
area��
37
© 2010 Macron Safety Systems (UK) Limited
SECTION 3 - SYSTEM DESIGN
EQUIPMENT:
FM-200® (UL/FM)
PUBLICATION:
14A-07H
ISSUE No.
02
DATE:
2010-03
Содержание FM-200
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