PN: 123-194, Rev. F
Page 5 of 44
Enclosure permeability and agent hold time:
The enclosure must be sufficiently sealed to retain the suppression agent for a period
of at least 15 minutes (Reference NFPA 2001, Sect 8.8.5). Any openings (doors to
hatches) will allow discharging agent to escape and will seriously affect the ability of
the agent to extinguish the fire.
Enclosure pressure relief:
The discharge of extinguishing agent creates both a negative pressure, when first
discharged, and subsequently a positive pressure in the enclosure. For proper function
of the extinguishing agent and to avoid structural damage to the enclosure – these
pressure variations must be controlled. These pressures can be relieved via a room
pressure relief device. One guide to determine the required pressure relief device is
the FSSA Guide “Estimating Enclosure Pressure and Pressure Relief Vent Area for
Applications Using Clean Agent Fire Extinguishing Systems.” (www.fssa.net)
Ambient temperature:
Sea-Fire “FG” and “FD” model series fire extinguishers are designed and tested to
operate in the following temperature ranges:
FG Models:
0
F (-18
C) to 130
F (54
C)
FD Models:
20
F (-7
C) to 130
F (54
C)
Additional information is provided about the temperature effects on the extinguishing
agent pressure in the System Maintenance Section of this manual.
Sea-Fire “FG” and “FD” extinguishers are designed to induce a minimum atmospheric
concentration of 8.7 percent within the protected compartment. This is equivalent to
a 30% safety factor on a 6.7% Minimum Extinguishing Concentration (MEC). In
addition to gasoline and diesel fuel, other flammable liquids with MEC values equal to
or below 6.7% for HFC-227ea may be protected by Sea-Fire “FG” and “FD” systems.
The specification table in this manual lists the minimum and maximum approved
compartment volume (size) allowable for each model (per NFPA 2001, UL 2166, FM
5600*).
Содержание FD 1001-1500
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