User's Manual

Design
P/N 81-CO2MAN-001 3-25 September 2013
If personnel could be in the protected space at any time, the following safety devices shall be
integrated into the carbon dioxide fire suppression system (Reference Paragraph 1-6.1):
• Pneumatic pre-discharge alarm (Pressure Operated Siren)
• Pneumatic Discharge delay (Discharge Delay)
• Addition of a distinctive odor to the discharging carbon dioxide (Odorizer Part No. 
81-897637-000 and 10030080), or automatic alarms that are activated by an oxygen or
carbon dioxide detector, or establishment and enforcement of confined space entry
procedures
• Warning signs in accordance with NFPA 12 (Warning Signs Part No. 06-231866-8XX
• Carbon dioxide system Lock-Out valve (Lockout Valves)
All closed sections of pipe (i.e., upstream of any time delay or lockout valves) shall be fitted
with a Safety Outlet (Part No. 81-803242-000).
3-5.4.2 DISCHARGE NOZZLES
For total flooding of large enclosures, Type "S" and Type "M" nozzles are generally used. For
total flooding of ducts and small enclosures, the Type "V" nozzle may be used.
The number of nozzles required depends on the following considerations:
• Maximum Spacing: 20 ft. (6.1 m)
• Flow Rate: Up to 120 lb./min (55 kg/min) per nozzle for "S" and "V" nozzles; Up to 240
lb./min (110 kg/min) per nozzle for "M" nozzles
If obstructions within the protected space interfere with the efficient distribution of the carbon
dioxide or if lower nozzle flow rates are desired, it may be necessary to increase the quantity
of nozzles.
The type of nozzles selected and their placement shall be such that the discharge will not
unduly splash flammable liquids or create dust clouds that might extend the fire, create an
explosion, or otherwise adversely affect the contents of the enclosure.
3-5.4.3 PRESSURE RELIEF VENTING
Pressure relief venting shall be verified and provided in accordance with NFPA 12.
WARNING
The Pneumatic Discharge Delay and any other valve that controls the flow of
agent shall be fitted with a manual bypass control that is supervised to alert
personnel when the device is in the bypass mode.