Fike Clean Agent System - 2.3 Safety Recommendations

SECTION 2 – DESIGN
Page 2 of 39 Fike Clean Agent System w/ FM-200™ UL / ULC Ex4623
Revision Date: January, 2010 Manual P/N: 06-215 (Rev G) FM 3010715
2.2.3 CLASS “B” FLAMMABLE LIQUIDS – AUTOMATICALLY OR MANUALLY ACTIVATED SYSTEMS
Systems that are protecting hazards containing Class B Flammable Liquids MUST be designed for the highest
concentration required of the specific fuels listed. Therefore, the designer must perform an audit of the hazard
space to identify the flammable liquids involved and their associated design concentrations. The fuel that requires
the highest concentration shall be the one that determines the design concentration for the hazard.
All Class B Flammable Liquids fire tests were conducted using commercial grade heptane to obtain a design
concentration of 8.7%. Please contact Fike for the design requirements of all other Class B flammable liquids.
2.3 SAFETY RECOMMENDATIONS
The following are safety recommendations as outlined in NFPA 2001, Section 1. The designer must be aware of
the occupancy of the hazard(s) being protected as they complete their evaluation of the project and make
adjustments or recommendations as necessary.
2.3.1 NORMALLY OCCUPIED SPACES
Protected spaces that are considered to be Normally Occupied (e.g. computer room, clean room, etc.) can be
designed for concentrations shown in Table 2.3.1 that correspond to a maximum permitted human exposure time
of five (5) minutes.
Concentration
Exposure
Time
9.0% 5.00 minutes
9.5% 5.00 minutes
10.0% 5.00 minutes
LOAEL 10.5% 5.00 minutes
11.0% 1.13 minutes
11.5% 0.60 minutes
12.0% 0.49 minutes
TABLE 2.3.1
2.3.2 NORMALLY NON-OCCUPIED SPACES
Protected spaces that are considered to be Not Normally Occupied (e.g. flammable liquids storage room) can be
designed for concentrations above the LOAEL concentration. Where personnel could possibly become exposed,
measures shall be taken to limit their exposure to the times shown in Table 2.3.1.
2.3.3 ALL SPACES
In the absence of the information needed to determine the expected exposure times, the following provisions shall
apply.
 Where egress takes longer than 30 seconds, but less than 1 minute, the design concentration
CANNOT exceed 10.5% by volume.
 Concentrations exceeding 10.5% by volume are permitted only in areas that are not normally
occupied by personnel – provided that personnel in the area can escape the area in 30 seconds. No
unprotected personnel shall enter the area during agent discharge.