800027-A 23 06/05/2023
4.5.2 Actual Concentration
To calculate the actual concentration (C
tmax
) achieved in the protected enclosure, at the maximum anticipated ambient temperature, the following
equation should be used:
where: W = agent being used (lb)
V = volume of the protected enclosure (ft³)
s = specific volume of superheated FK-5-1-12 vapor (ft³/lb)
s can be approximated by using the following formula:
Where: t = maximum anticipated ambient temperature (°F)
CAUTION
Care must be taken to ensure that the actual concentration, at the maximum anticipated ambient temperature in the protected enclosure
does not exceed the values specified in NFPA 2001.
4.6 Maximum Protected Volume Limitations
The maximum volume that can be protected by the Firetrace FK-5-1-12 units is dependent on the design concentration and the minimum ambient
design temperature specified for a given hazard.
The following sections can be used for FK-5-1-12 (regardless of agent, and for a standard NFPA defined class of fire as specified.
For more detailed information and an expanded range of temperatures for each system, please refer to the tables in APPENDIX B – PROTECTED
VOLUMES BASED ON DESIGN CONCENTRATIONS.
4.6.1 Class A Fires (All FK-5-1-12 agents)
Table 26 – Class A Fire Enclosure Volume Limitations
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