Code of Massachusetts Regulations › 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS › Chapter 9 - Fire Protection Systems › Section 904 - ALTERNATIVE AUTOMATIC FIRE-EXTINGUISHING SYSTEMS › Subsection 904.11 - Commercial cooking systems

Current through Register 1525, July 5, 2024
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: [F]
1. Carbon dioxide extinguishing systems, NFPA
				12.
2.
Automatic sprinkler
				systems
, NFPA 13.
3.
				Foam-water sprinkler system or foam-water spray systems, NFPA 16.
4. Dry-chemical extinguishing systems, NFPA
				17.
5. Wet-chemical extinguishing
				systems, NFPA 17A.
Exception:
Factory-built commercial cooking
				  recirculating systems that are tested in accordance with UL 710B and
listed
,
labeled
and installed in accordance
				  with Section 304.1 of the
International Mechanical
				  Code
.
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. [F]
Exception:
Automatic sprinkler
				  systems
shall not be required to be equipped with manual actuation
				  means.
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 (15 240 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. [F]