FIRETRACE FK-5-1-12 - Design Procedure; Hazard Enclosure Limitations; Enclosure Size and Nozzle Limitations

800027-A 20 06/05/2023
Cylinder Pressure
Temperature
Pressure
°F
°C
psig
bar
0
-17.8
139
9.6
10
-12.2
147
10.1
20
-6.7
155
10.7
30
-1.1
163
11.2
40
4.4
171
11.8
50
10.0
179
12.3
60
15.5
187
12.9
70
21.1
195
13.4
80
26.7
203
14.0
90
32.2
211
14.5
100
37.8
219
15.1
110
43.3
227
15.7
120
48.9
235
16.2
130
54.4
243
16.8
Table 19 - Cylinder Pressure-Temperature Relationship
4.3 Design Procedure
The following procedures should be used to design a Firetrace FK-5-1-12 Self-Contained Automatic Indirect Fire Suppression Unit. In addition, the
applicable requirements specified in Chapter 5 of NFPA 2001 should be followed.
a. Conduct a survey and analysis of the hazard to be protected.
b. Determine the height, length, and width of the enclosure. Calculate the volume. All of these parameters must be within the dimensional
limits specified in this Manual.
c. Determine the anticipated minimum and maximum ambient temperatures expected within the enclosure to be protected.
d. Determine the minimum design concentration required for the hazard.
e. Determine the integrity of the enclosure and if any openings must be closed at the time of agent discharge.
f. Determine the cylinder size required based on the hazard volume limitations and enclosure size.
Remember, as cautioned in Section 2 of this Manual, only one (1) extinguisher unit can be used to protect one (1) hazard.
g. Based on the total quantity of agent being used at the maximum ambient temperature expected within the enclosure, evaluate personnel
safety exposure limits.
h. Determine the location of the FK-5-1-12 cylinder.
i. Determine the location and quantity of nozzles required based on the size and configuration of the enclosure.
j. Determine the routing and quantity of discharge network required. The discharge network and fitting limitations must not be exceeded.
k. Determine the arrangement and placement of the Firetrace detection tubing (FDT).
l. Determine any auxiliary equipment requirements such as a pressure switch(s) to sound alarms, shut-down ventilation, shut-off electrical
power, etc.
m. Prepare system drawings, bill of materials list, etc.; following the applicable sections of Chapter 5 of NFPA 2001, as needed.
4.4 Hazard Enclosure Limitations
4.4.1 Enclosure Size and Nozzle Limitations
The maximum dimensions and area coverage for each size unit are shown in Table 20 - Enclosure Size and Nozzle Limitations. The protected
enclosure can be any size, shape, or volume, provided that the dimensions do not exceed the limitations shown in Table 20 - Enclosure Size and
Nozzle Limitations.