5.2 System Actuation.
5.2.1 All systems shall have both automatic and manual methods of actuation.
5.2.1.1 The automatic and manual means of system actuation, external to the control head or
releasing device, shall be separate and independent of each other so that a failure of one will
not impair the operation of the other.Copyright NFPA
5.2.1.2 When a listed releasing mechanism is used employing a single line for mechanical
detection and remote manual control, the remote manual control shall be installed inline, prior
to all detection devices, so malfunction of one does not impede operation of the other.
5.2.1.3 Automatic detection and system actuation shall be in accordance with the
manufacturer’s listed installation and maintenance manual.
5.2.1.4 All devices necessary for proper operation of the system shall function simultaneously
with the system operation.
5.2.1.5 Operation of any manual actuator shall be all that is required to bring about the full
operation of the system.
5.2.1.6 At least one manual actuator shall be provided for each system.
5.2.1.7 All operating devices shall be designed, located, installed, or protected so that they are
not subject to mechanical, environmental, or other conditions that could render them
inoperative or cause inadvertent operation of the system.
5.2.1.8 An audible or visual indicator shall be provided to show that the system has operated,
that personnel response is needed, and that the system is in need of recharge.
5.2.1.9 The extinguishing system shall be connected to the fire alarm system, if provided, in
accordance with the requirements of NFPA 72, so that the actuation of the extinguishing system
will sound the fire alarm as well as provide the function of the extinguishing system.
5.2.1.10* A readily accessible means for manual actuation shall be located in a path of egress.
When manual actuation is used for cooking-related protection, the manual actuation device
shall be installed no more than 48 in. (1200 mm), and no less than 42 in. (1067 mm), above the
floor and shall clearly identify the hazard protected.
5.2.1.11 Automatic systems protecting common exhaust ducts only shall not require a remote
manual actuator.
5.2.1.12 The means for mechanical actuator(s) shall be mechanical and shall not rely on
electrical power for actuation.
5.2.1.13 Electrical power shall be permitted to be used for manual actuation if a reserve power
supply is provided or if supervision is provided as per Section 5.3.
5.3 Supervision.
5.3.1 Where electrical power is required to operate the fixed automatic fire-extinguishing
system, the system shall be monitored by a supervisory alarm with a reserve power supply
provided.
5.3.1.1 Where supervision of any or all of the following is provided, it shall be designed to
give an indication of trouble in the following: Copyright NFPA
(1) Automatic detection system
(2) Electrical actuation circuit
(3) Electrical power supply
5.3.1.2 Signals indicating the failure of supervised devices or equipment shall give prompt and
positive indication of any failure and shall be distinct from signals indicating operation or
hazardous conditions.
5.3.2 Where fixed automatic fire-extinguishing systems include automatic mechanical
detection and actuation as a backup detection system, electrical power monitoring and a reserve
power supply shall not be required.
5.3.3 Where fixed automatic fire-extinguishing systems are interconnected or interlocked with
the cooking equipment power sources so that if the fire-extinguishing system becomes
inoperable due to power failure, all sources of fuel and heat to all cooking appliances serviced
by those power sources shall automatically shut off.
5.4* System Location.
5.4.1 Wet chemical containers and expellant gas assemblies shall be located within the
temperature range specified in the manufacturer’s listed installation and maintenance manual.
5.4.2 If ambient temperatures outside the manufacturer’s operating temperature range are
expected, protection shall be provided to maintain the temperature within the listed range.
5.4.3 Wet chemical containers and expellant gas assemblies shall not be located where they
could be subjected to mechanical, chemical, or other damage.
5.4.4 Where damage due to chemical or mechanical exposure is expected, protective devices
such as enclosures or guards acceptable to the authority having jurisdiction shall be provided.
5.4.5 Wet chemical containers and expellant gas assemblies shall be accessible for inspection,
maintenance, and recharge.
5.4.6 Wet chemical containers and expellant gas assemblies shall be located per the
manufacturer's limitations but not where they will be exposed to the fire.
5.5 Discharge Nozzles.
All discharge nozzles shall be located to minimize damage or misalignment and be within the
limitations and cons