SECTION 1 – EQUIPMENT
UL / ULC Ex4623 Fike Clean Agent System w/ FM-200™ Page 3 of 25
FM 3010715 Manual P/N: 06-215 (Rev G) Revision Date: January, 2010
HFC-227ea systems provided for Normally Non-Occupied Spaces can be designed for concentrations in
excess of the LOAEL concentration of 10.5%. Where a possibility exists for personnel to be exposed, means
shall be provided to limit exposure times in accordance with the above table. In the absence of the information
needed to fulfill the conditions listed above, the following provisions shall apply.
Where egress takes longer than 30 seconds but less than 1 minute, the HFC-227ea system shall not
be designed for a concentration exceeding the LOAEL of 10.5% by volume.
Where egress takes less than 30 seconds, the HFC-227ea system can be designed for a
concentration that exceeds the LOAEL of 10.5% by volume.
1.4.3 TOXICITY
With a database in excess of 70 toxicity tests, HFC-227ea has been extensively tested and approved by
institutions and agencies around the world. The LC50 toxicity rating for HFC-227ea is greater than 800,000 ppm.
When you consider that most HFC-227ea systems are designed for concentrations providing 105,000 ppm or
less, it is evident that HFC- 227ea is safe to use.
HFC-227ea will decompose to form halogen acids when exposed to extremely high temperatures. The formation
of these acids is minimized by using fast-acting Fike detection and control systems, and proper system design
and installation of the piping system to deliver the agent quickly. The generation of by-products from the HFC-
227ea discharge will be minimal when properly applied.
1.4.4 NOISE
The high-pressure discharge from the nozzle(s) of a system can cause noise that is loud enough to be startling,
but ordinarily insufficient to cause traumatic injury.
1.4.5 TURBULENCE
The high velocity discharge from the nozzle(s) can be sufficient enough to dislodge substantial objects located
directly in the discharge path. Enough general turbulence may be created within the enclosure to move
unsecured paper and light objects.
1.4.6 1.4.6 CHILLING
Direct contact with the vaporizing agent being discharged from the nozzle(s) will have a chilling effect on objects
and can cause cryogenic burns to the skin. The liquid phase vaporizes rapidly when mixed with air, thus limiting
the hazard to the immediate vicinity of the discharge nozzle.
1.4.7 VISIBILITY
Although HFC-227ea is odorless, discharging the agent into a humid atmosphere may cause a reduction in
visibility for a brief period of time due to condensation of water vapor normally present in the room atmosphere.
1.4.8 PRESSURE
The normal operating pressure of a Fike HFC-227ea clean agent extinguishing system unit is 360 psig @ 70
o
F
(24.8 bar
@ 21
o
C). This is accomplished by adding a charge of nitrogen to the HFC-227ea agent. Since these
are pressurized vessels, care must be observed when handling, filling and transporting storage containers. The
anti-recoil devices (baffle plugs or baffle plates) MUST be in place whenever the charged container is removed
from the piping network.
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