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SECTION
904 ALTERNATIVE AUTOMATIC FIRE-EXTINGUISHING SYSTEMS
[F]
904.1 General. Automatic fire-extinguishing systems, other
than automatic sprinkler systems, shall be designed, installed,
inspected, tested and maintained in accordance with the provisions
of this section and the applicable referenced standards.
[F]
904.2 Where required. Automatic fire-extinguishing systems
installed as an alternative to the required automatic sprinkler
systems of Section 903 shall be approved
by the fire code official. Automatic fire-extinguishing
systems shall not be considered alternatives for the purposes
of exceptions or reductions allowed by other requirements
of this code.
[F]
904.2.1 Commercial hood and duct systems. Each required
commercial kitchen exhaust hood and duct system required
by the International Fire Code or the International Mechanical
Code to have a Type I hood shall be protected with an approved
automatic fire-extinguishing system installed in accordance
with this code.
[F]
904.3 Installation. Automatic fire-extinguishing systems
shall be installed in accordance with this section.
[F]
904.3.1 Electrical wiring. Electrical wiring shall be
in accordance with the ICC Electrical Code.
[F]
904.3.2 Actuation. Automatic fire-extinguishing systems
shall be automatically actuated and provided with a manual
means of actuation in accordance with Section 904.11.1.
[F]
904.3.3 System interlocking. Automatic equipment interlocks
with fuel shutoffs, ventilation controls, door closers,
window shutters, conveyor openings, smoke and heat vents
and other features necessary for proper operation of the
fire-extinguishing system shall be provided as required
by the design and installation standard utilized for the
hazard.
[F]
904.3.4 Alarms and warning signs. Where alarms are required
to indicate the operation of automatic fire-extinguishing
systems, distinctive audible and visible alarms and warning
signs shall be provided to warn of pending agent discharge.
Where exposure to automatic-extinguishing agents poses a
hazard to persons and a delay is required to ensure the
evacuation of occupants before agent discharge, a separate
warning signal shall be provided to alert occupants once
agent discharge has begun. Audible signals shall be in accordance
with Section 907.9.2.
[F]
904.3.5 Monitoring. Where a building fire alarm system
is installed, automatic fire-extinguishing systems shall
be monitored by the building fire alarm system in accordance
with NFPA 72.
[F]
904.4 Inspection and testing. Automatic fire-extinguishing
systems shall be inspected and tested in accordance with the
provisions of this section prior to acceptance.
[F]
904.4.1 Inspection. Prior to conducting final acceptance
tests, the following items shall be inspected:
1. Hazard specification for consistency with design hazard.
2.
Type, location and spacing of automatic- and manual-initiating
devices.
3. Size, placement and position of nozzles or discharge
orifices.
4. Location and identification of audible and visible
alarm devices.
5. Identification of devices
with proper designations.
6. Operating instructions.
[F]
904.4.2 Alarm testing. Notification appliances, connections
to fire alarm systems and connections to approved supervising
stations shall be tested in accordance with this section
and Section 907 to verify proper operation.
[F] 904.4.2.1 Audible and visible signals. The
audibility and visibility of notification appliances signaling
agent discharge or system operation, where required, shall
be verified.
[F]
904.4.3 Monitor testing. Connections to protected premises
and supervising station fire alarm systems shall be tested
to verify proper identification and retransmission of alarms
from automatic fire-extinguishing systems.
[F]
904.5 Wet-chemical systems. Wet-chemical extinguishing
systems shall be installed, maintained, periodically inspected
and tested in accordance with NFPA 17 A and their listing.
[F]
904.6 Dry-chemical systems. Dry-chemical extinguishing
systems shall be installed, maintained, periodically inspected
and tested in accordance with NFPA 17 and their listing.
[F]
904.7 Foam systems. Foam-extinguishing systems shall be
installed, maintained, periodically inspected and tested in
accordance with NFPA 11 and NFPA 16 and their listing.
[F]
904.8 Carbon dioxide systems. Carbon dioxide extinguishing
systems shall be installed, maintained, periodically inspected
and tested in accordance with NFPA 12 and their listing.
[F]
904.9 Halon systems. Halogenated extinguishing systems
shall be installed, maintained, periodically inspected and
tested in accordance with NFPA 12A and their listing.
[F]
904.10 Clean-agent systems. Clean-agent fire-extinguishing
systems shall be installed, maintained, periodically inspected
and tested in accordance with NFPA 2001 and their listing.
[F]
904.11 Commercial cooking systems. The automatic fire-extinguishing
system for commercial cooking systems shall be of a type recognized
for protection of commercial cooking equipment and exhaust
systems of the type and arrangement protected. Preengineered
automatic dry- and wet-chemical extinguishing systems shall
be tested in accordance with UL 300 and listed and labeled
for the intended application. Other types of automatic fire-extinguishing
systems shall be listed and labeled for specific use as protection
for commercial cooking operations. The system shall be installed
in accordance with this code, its listing and the manufacturer's
installation instructions. Automatic fire-extinguishing systems
of the following types shall be installed in accordance with
the referenced standard indicated, as follows:
1. Carbon dioxide extinguishing
systems, NFPA 12.
2. Automatic sprinkler systems,
NFPA 13.
3. Foam-water sprinkler system
or foam-water spray systems, NFP A 16.
4. Dry-chemical extinguishing
systems, NFPA 17.
5. Wet-chemical extinguishing systems, NFP A 17 A.
Exception:
Factory-built commercial cooking recirculating systems that
are tested in accordance with UL 71 OB and listed, labeled
and installed in accordance with Section
304.1 of the International Mechanical Code.
[F]
904.11.1 Manual system operation. A manual actuation
device shall be located at or near a means of egress from
the cooking area a minimum of 10 feet (3048 mm) and a maximum
of 20 feet (6096 mm) from the kitchen exhaust system. The
manual actuation device shall be installed not more than
48 inches (1200 mm) or less than 42 inches (1067 mm) above
the floor and shall clearly identify the hazard protected.
The manual actuation shall require a maximum force of 40
pounds (178 N) and a maximum movement of 14 inches (356
mm) to actuate the fire suppression system.
Exception: Automatic sprinkler systems shall not be required
to be equipped with manual actuation means.
[F]
904.11.2 System interconnection. The actuation of the
fire suppression system shall automatically shut down the
fuel or electrical power supply to the cooking equipment.
The fuel and electrical supply reset shall be manual.
[F]
904.11.3 Carbon dioxide systems. When carbon dioxide
systems are used, there shall be a nozzle at the top of
the ventilating duct. Additional nozzles that are symmetrically
arranged to give uniform distribution shall be installed
within vertical ducts exceeding 20 feet (6096 mm) and horizontal
ducts exceeding 50 feet (15240 mm). Dampers shall be installed
at either the top or the bottom of the duct and shall be
arranged to operate automatically upon activation of the
fire-extinguishing system. Where the damper is installed
at the top of the duct, the top nozzle shall be immediately
below the damper. Automatic carbon dioxide fire-extinguishing
systems shall be sufficiently sized to protect against
all hazards venting through a common duct simultaneously.
[F] 904.11.3.1 Ventilation system. Commercial-type
cooking equipment protected by an automatic carbon dioxide-extinguishing
system shall be arranged to shut off the ventilation system
upon activation.
[F]
904.11.4 Special provisions for automatic sprinkler systems.
Automatic sprinkler systems protecting commercial-type cooking
equipment shall be supplied from a separate, readily accessible,
indicating-type control valve that is identified.
[F] 904.11.4.1 Listed sprinklers. Sprinklers used
for the protection of fryers shall be tested in accordance
with UL 199E, listed for that application and installed
in accordance with their listing.
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