1-2.1.2.2 Unbalanced System Agent Storage Container Temperature Range; 1-2.2 Extinguishing Agent; 1-2.2.1 Toxicity - Kidde Fire Systems ECS Manual

1-2.1.2.2 Unbalanced System Agent Storage Container Temperature Range

In unbalanced systems, where agent flows through the nozzles at varying rates, the agent
cylinder storage temperature range is 60°F and 80°F (16°C and 27°C).
The latest version of the flow calculation software is written and tested for a 70°F (21°C) agent
cylinder storage temperature (for more information see latest version of the Flow Calculation
Software User's Guide 06-236272-001). If the agent cylinder storage temperature is outside
of this range, an insufficient quantity of agent may be discharged from one or more nozzles in
an unbalanced system, resulting in one or more hazards receiving an insufficient concentration
of agent.
1-2.2 Extinguishing Agent
HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane) is a compound of carbon, fluorine and
hydrogen (CF
fire by a combination of chemical and physical mechanisms with minimal effect on the available
oxygen. This allows people to see and breathe, permitting them to leave the fire area safely.
HFC-227ea is acceptable for use in occupied spaces when used in accordance with the United
States Environmental Protection Agency (EPA) Significant New Alternatives Policy (SNAP)
program rules.
Although HFC-227ea is considered non-toxic to humans in concentrations necessary to
extinguish most fires, certain safety considerations should be observed when applying and
handling the agent. The discharge of HFC-227ea may create a hazard to people from the
undecomposed agent itself and from the decomposition products which result when the agent
is exposed to fire or other hot surfaces. Exposure to the agent is generally of less concern than
is exposure to the decomposition products. Unnecessary exposure to the agent or the
decomposition products should be avoided.
1-2.2.1 Toxicity
Unnecessary exposure to clean agents is to be avoided in accordance with the requirements of
NFPA-2001, 2000 Edition. As such, upon operation of a system pre-discharge alarm, all
personnel should immediately exit the protected space. In no case shall personnel remain in a
room in which there is a fire. In the very unlikely instance where a clean agent system should
discharge unexpectedly into an occupied room, all personnel should proceed in a calm and
orderly manner to an exit and leave the room.
HFC-227ea halocarbon clean agent has been evaluated for cardiac sensitization in accordance
with test protocols approved by the United States Environmental Protection Agency (U.S. EPA).
The EPA's SNAP Program classifies HFC-227ea as acceptable for use as a total flooding agent
in occupied spaces with specific limitations. Refer to the SNAP program rules or NFPA 2001 for
more information. HFC-227ea halocarbon clean agent has been judged acceptable by the U.S.
EPA for use in occupied spaces when used in accordance with the guidance of NFPA 2001. In
accordance with NFPA 2001. HFC-227ea halocarbon clean agent systems designed for use with
agent vapor concentrations up to nine volume per cent in air are permitted. See NFPA 2001,
2012 Edition Sect. 1-5, Safety. Although HFC-227ea has negligible toxicity in concentrations
needed to suppress most fires, certain safety considerations must be observed when applying
and handling the agent. The discharge of HFC-227ea halocarbon clean agent has negligible
toxicity in concentrations needed to suppress most fires, certain safety considerations must be
observed when applying and handling the agent. For example, HFC-227ea is a liquefied
compressed gas. Upon release to atmospheric pressure (e.g., from nozzles) the liquid flash
evaporates at a low temperature (2°F/-16°C). Thus, nozzles must be located to avoid direct
impingement on personnel.
06-236115-001
CHFCF ). It is colorless, odorless and electrically non-conductive. It suppresses
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General Information
October 2014