HP Performance Optimized Datacenter 20c User Guide - North America

Life safety systems 21
Fire suppression
system stages
Beats per minute Description Personnel actions
Warning
20 An alarm condition exists Personnel may investigate
Pre-discharge
120 Countdown to fire suppression
agent has started
Personnel should evacuate
Post-discharge
Steady Fire suppression agent is released Personnel should not enter,
contact local AHJ
The fire system operator panel indicates which initiation sequence has begun with indicator lights and a
panel alarm. These signals are also available to the site BMS system, if connected.
After the fire suppression system is activated by either a 60-second VESDA signal or a 30-second manual fire
pull, a countdown begins before the fire suppression agent is released to the HP POD 20c interior through the
fire suppression system piping.
VESDA initiation
The VESDA fire suppression system signal has two levels that the system cycles through when smoke is
detected.
• Level 1—Indicates that the potential for a fire is present. The strobes are illuminated and the horns are
in the Warning stage. A fire has not yet been detected and personnel may investigate to determine if
there is a potential for a fire or if a false indication has occurred.
• Level 2—Indicates that fire does exist. VESDA Level 1 has already have been reached, the strobes
illuminate, and the horn progresses to the Pre-discharge stage. A 60-second countdown to fire
suppression agent release begins and personnel should evacuate immediately.
Press the fire suppression abort button to interrupt the fire suppression release countdown. Pressing the abort
button resets the countdown to 10 seconds, regardless of the amount of time elapsed from the original
60-second countdown. The abort button can be pressed multiple times to reset the fire suppression release
agent countdown to 10 seconds. The fire suppression agent is released when the countdown is exhausted
and the horn progresses to the Post-discharge stage.
Personnel can press and hold the fire suppression abort button to stop the original 60-second initiation
sequence. When the abort button is released, the system countdown resets to 10 seconds. The fire
suppression agent release begins when the 10-second countdown is over and the horn progresses to the
Post-discharge stage.
Manual initiation
Manual initiation causes the fire strobe lights to illuminate, the horn to move to the Pre-discharge stage, and
the 30-second countdown to the release of the fire suppression agent begins. The agent release is certain at
this time and cannot be aborted. After the fire suppression agent is released, the system moves to the
Post-discharge stage.
The fire suppression abort button is inactive if a manual fire button was activated. All personnel should
immediately evacuate.
Emergency egress
The HP POD 20c includes the following features for life safety egress on all access doors:
• Panic bar
• Door strikes