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Zorluk: ZorPhysical Security Controls and Environmental Measures

An infrastructure manager is auditing the environmental and life-safety controls of a newly built core network distribution facility. The server room relies on a total-flooding clean-agent gaseous fire suppression system to protect high-density switches and fiber interconnects. During a simulated system test, concern is raised regarding structural room integrity and agent containment when the high-pressure gas discharges. Which HVAC and airflow control procedure must be implemented upon fire suppression activation to ensure maximum suppression effectiveness while preventing structural damage?

  1. Automatically actuate motorized dampers to seal HVAC supply and return ducts while opening dedicated pressure relief vents to manage displacement pressure.Cevap
  2. B
    Maintain full capacity operation of the primary HVAC exhaust fans to extract combustion smoke while the clean agent dissipates.
  3. C
    Switch the HVAC system into a high-volume negative pressure mode to draw surrounding ambient air into the room during discharge.
  4. D
    Engage auxiliary wet-pipe sprinkler heads simultaneously to cool room boundaries and absorb the expanding gaseous agent.

Cevap

Automatically actuate motorized dampers to seal HVAC supply and return ducts while opening dedicated pressure relief vents to manage displacement pressure.
Clean-agent gaseous fire suppression systems function by rapidly discharging gas into an enclosed space to achieve a specific chemical concentration. Automatically closing HVAC supply and return dampers prevents the agent from diluting or escaping into neighboring zones. Concurrently, opening dedicated pressure relief vents dissipates the sudden rise in room pressure during discharge, safeguarding the structural integrity of walls and ceiling enclosures.

Adım Adım Çözüm

1
Analyze total-flooding clean-agent fire suppression operational requirements.
Gaseous agents (such as FM-200 or Novec 1230) require an enclosed room to maintain minimum design concentration for suppressing fire without oxygen depletion or equipment corrosion.
Air leakage through open ductwork dilutes the suppression agent.
2
Evaluate pressure dynamics during rapid gas discharge.
Discharging high-pressure gaseous agents within seconds creates a positive pressure wave that can damage drywalls, ceiling tiles, and doors if unvented.
Pressure relief vents calibrated for over-pressure release protect room integrity without permitting continuous ambient airflow.
3
Determine correct HVAC damper and vent control sequence.
Motorized fire/smoke dampers on main HVAC ducts must instantly close upon discharge signal, while dedicated pressure relief vents open temporarily to release peak pressure.
This sequence ensures structural safety while keeping suppression agent concentration contained.

Anahtar Kavram

Clean-Agent Fire Suppression and Environmental HVAC Interlocks
Tahmini Süre:2m 0s
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Konular

Physical Security Controls and Environmental Measures

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