Kidde Fire Protection 400 Series, Design, Installation, Operation, And Maintenance Manual

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General Information
06-237518-001 1-19 July 2018
1-5.6 Agent Pressure verse Temperature Formulas
See the individual Agent sections for the corresponding graphs.
1-5.7 Operating Temperature Range Limitations
The Kidde IGS has an operating temperature range of -20° to 50°C (-4° to 122°F).
During discharge the temperature within the protected enclosure will drop approx. 5 – 10 °C
(9-18 °F). The temperature will rise again after approx. 2 – 3 min.
1-5.7.1 Storage
The seemless steel container is filled to 300 bar at 15°C (4351 psig at 60°F) or 200 bar at 15°C
(2901 psig at 60°F) as listed on the label. The pressure of the stored Agent varies substantially
with temperature changes, as illustrated by the temperature verses pressure graphs shown
previously for each Agent. When discharged, the Agent is a gas and is uniformly distributed as
it enters the fire area.
1-6 NOISE CONSIDERATION
Hard disc drives may fail during release of Kidde IGS due to acoustic noise issues. At specific
frequencies and decibel (dB) levels, vibrations transfer through the flexible stainless steel
cover of a hard drive case transmitting vibration into the inner workings of the drive, causing
the read/write element to misalign and fail. The combination of audible warning alarms and
nozzle sound are currently believed to be the most important factor that may cause hard discs
to “vibrate” and fail. Typical sound level from an Inert gas nozzle is approx. 120 – 130 db
measured in a distance of 2 meters.
Note: Warning alarms are typically 110 – 120 db or must be a minimum of 10 db above the
ambient sound level during normal operation processes.
To the best of Kidde Fire Protection’s knowledge, the reported failures happened during testing
or from unexpected releases where no fires were involved. As such, normal server shutdown
was not initiated and time delays did not operate, thus not permitting sufficient time for the
discs to stop spinning. Therefore, it is important to ensure proper shutdown of computer
systems prior to discharge if possible. Additionally, when testing systems, it is advisable to
initiate a shutdown prior to the test.
Other precautionary measures may also be taken such as housing the drives within sound
proof cabinets or the use of solid state drives, for further information consult your drive
manufacturer and/or Kidde Fire Protection.
Table 1-3. Agent Pressure Verse Temperature Formulas
Agent Temp. Unit 200 bar 300 bar
IG-100 °F P = 0.555(t) + 167.2 P = 0.894(t) + 247.1
°C P = 0.999(t) + 185.0 P = 1.610(t) + 275.7
IG-541 °F P = 0.616(t) + 163.6 P = 1.019(t) + 239.7
°C P = 1.108(t) + 183.3 P = 1.835(t) + 272.4
IG-55 °F P = 0.575(t) + 166.0 P = 0.943(t) + 244.2
°C P = 1.035(t) + 184.4 P = 1.697(t) + 274.4
IG-01 °F P = 0.600(t) + 164.5 P = 1.005(t) + 240.6
°C P = 1.080(t) + 183.7 P = 1.809(t) + 272.8