Carbon Dioxide Suppression Systems Safety Upgrade

Carbon Dioxide
Suppression Systems Safety Upgrade
ARE YOU COMPLIANT?
The purpose of this brochure is to provide you the
mechanical requirements needed for upgrading existing
CO2 systems to meet the revised NFPA Standard 12, 2011
Edition, which addresses personnel safety and reliability.
These are mandatory upgrades for new and all existing
systems that were required to be in compliance by
Examples covered in the NFPA Standard 12
where CO2 is suitable include:
• Where clean agent concentrations are above LOAEL
or result in oxygen levels less than 8%.
• Where energized electrical equipment is >400 volts
and have grouped cables.
December 31, 2008.
These changes implemented by the NFPA Standard 12,
reflect a continuing effort to improve “life safety” features
• Where unclose-able openings limit the ability to
build concentrations or require extended discharge
not offered by other agents.
of both new and existing CO2 fire extinguishing systems.
Kidde offers an array of Clean Agent and CO2 product
• Marine cargo holds and some engine rooms.
lines to provide a wide selection of gaseous agent fire
protection options. When CO2 is selected as the suitable
agent, these safety devices need to be considered.
This information is not intended to take the place of a
EXISTING INSTALLATIONS
Existing systems shall be upgraded to meet the
requirements for graphic safety signs, lock-out valves,
complete review of the NFPA Standard 12, 2011 Edition.
pneumatic time delays and pneumatic pre-discharge alarms
The current edition should be consulted for all noted
where suitable.
changes, exceptions and clarifications included in the
standard, but not presented herein.
All existing CO2 systems shall be upgraded by adding new
signage and hazard lockout valves as a minimum. Further,
for total flooding applications, pneumatic pre-discharge
delays and sirens are required if hazard occupation is possible.
Pneumatic pre-discharge sirens may be a good choice for
local application systems where CO2 concentrations exceed
7.5% or where personnel are exposed to unsafe CO2 levels.
If hazards are normally occupied rooms, a clean agent system
may be a suitable alternative.
The installation of graphic safety signs does not require
any modifications to the system and should be completed
immediately.
The addition of supervised lock-out valves, pneumatic
pre-discharge alarms and pneumatic time delays may
require that the system flow calculations be verified
for proper system performance. That is, the additional
equipment adds equivalent pipe length to the system. The
pneumatic pre-discharge alarm requires carbon dioxide
flow to sound. The revised design should be in accordance
with the agent quantity requirements of the standard.
However, for high value areas that are not normally
These modifications could necessitate revisions to the pipe,
occupied, a CO2 fire system may be a good choice.
the valves and/or the discharge nozzles.
NFPA STANDARD #12: CARBON DIOXIDE
UPGRADE ILLUSTRATION FOR HIGH PRESSURE CO2
The following are the safety considerations required for new and existing systems:
LOCKOUT VALVES
ALARMS
For all new and existing CO2 systems, manual lockout valves shall be
provided, rare exceptions apply. Status switches for lockout valves
shall report to the system control unit or building fire alarm panel. In
a low-pressure system, the tank shutoff valve shall not be considered
as a lockout valve, except where the tank supplies a single hazard or is
protecting multiple interrelated hazards.
Provide automatic alarms at the entry to and within such spaces that
are protected by carbon dioxide fire systems. Establish confined space
entry procedures for CO2 system lockout and enforce limited area access.
PRE-DISCHARGE ALARM AND TIME DELAY
A pneumatic pre-discharge time delay and pneumatic alarm shall be
provided for the following enclosures:
• Most total flooding systems hazard spaces
• Local application systems which expose personnel to CO2
concentrations in excess of 7.5% for longer than 5 minutes
OLFACTORY INDICATION
Addition of a distinctive odor to the discharging carbon dioxide serves
as an indication that carbon dioxide gases are present. Personnel
should be trained to recognize the odor and evacuate spaces where
the odor is detected. Check for suitability of olfactory indication.
DISCHARGE PRESSURE SWITCH
A discharge pressure switch shall be installed between the carbon
dioxide supply and the lockout valve. Activation of a pressure switch
shall operate warning alarms.
MAINTENANCE SWITCH
A maintenance switch shall be wired into the solenoid release circuit
to permit a means of electrically disabling the system. This meets the
code requirement of a disconnect switch.
The current NFPA Standard 12 does not allow the use of Class 150
malleable iron fittings. All system upgrades should include the use of
Class 300 or Class 600 fittings for the modified portion of the systems.
Refer to the NFPA 12 standard for specific requirements pertaining to
low pressure and high pressure applications.
EXTINGUISHING SYSTEMS, 2011 EDITION
OTHER CONSIDERATIONS FOR UPGRADES TO EXISTING CO2 SYSTEMS
System Release Control Panels – Kidde offers conventional, addressable and multiple hazard control panels, all in
conformance with UL 864 listings. Enclosure options: NEMA 1, as well as industry exclusive NEMA 4, and 12 are available.
ALTERNATE SUPPRESSOR OPTIONS
If safety concerns drive the decision for an alternate method of fire protection, Kidde offers these four gaseous agent systems
for consideration. These options provide proven fire suppression qualities, are environmentally friendly and cause no adverse
effects to equipment.
CLEAN AGENTS: FM-200 & Novec 1230
INERT GASES: Nitrogen & Argonite
WE CAN HELP!
We understand that staying on top of codes and being current with all of the regulatory requirements can be difficult and
daunting. We are able and willing to leverage our knowledge and experience to help you navigate the compliance process.
Here are two ways that we can help you:
• You can call us for a packet of information about the current requirements so that you can assess your own
needs on your own schedule.
• We can arrange to meet with you at the site facility to discuss current system status and provide a path
to full compliance.
To arrange for a visit, to obtain additional information, to participate in a webinar or to simply speak with a
knowledgeable and experienced professional, please contact one of our North American Regional Sales Managers:
Northeast
Vernon Gross
T: 508.889.6890 E: vernon.gross@fs.utc.com
Mid Atlantic
Peter Nardelli
T: 508.878.1859 E: peter.nardelli@fs.utc.com
Southeast
Bruce Bowman
T: 708.465.6241 E: bruce.bowman@fs.utc.com
South Central
Shannon Porter
T: 713.244.4653 E: shannon.porter@fs.utc.com
Southwest
Ron Parker
T: 480.428.9003 E: ronald.parker@fs.utc.com
Midwest
Jeff DeTemple
T: 508.361.8478 E: jeff.detemple@fs.utc.com
Northwest
Chris Gendron
T: 612.206.5027 E: christian.gendron@fs.utc.com
Canada
Tareq El-Imam
T: 647.308.6482 E: tareq.el-imam@fs.utc.com
Kidde Fire Systems
400 Main Street, Ashland, MA 01721
www.kiddefiresystems.com
Kidde Fire Systems™ is a trademark of Kidde-Fenwal, Inc.
November 2015 © Kidde-Fenwal, Inc. All rights reserved.
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