Sea-Fire FK-5-1-12 User manual

PN: 123-330, Rev. F Page 1of 52
FK-5-1-12
Model NFG and NFD Fire Suppression Systems
Installation, Operation, and Maintenance Manual
This manual is an integral part of the system approval. The suppression system must
be installed and maintained in accordance with all listed requirements.
U.S. Coast Guard Approved
162.029/248/0
FM Approved
3045557
Read and comply with these instructions, warnings, and limitations before installing.
Suitable for use on:
NFG 25-100 Models: 20F (-7C) to 130F (54C)
NFD 101-825 Models: 20F (-7C) to 130F (54C)
NFD 826-1800 Models: 32F (0C) to 130F (54C)
Always maintain this manual
nearby for operator reference.
Manual PN: 123-330, Rev. F
Printed in the USA.

PN: 123-330, Rev. F Page 2of 52
Warnings
WARNING
CONCENTRATED AGENT AND BY-PRODUCT OF APPLICATION TO FIRE ARE TOXIC.
AVOID BREATHING OF FUMES OR PROLONGED EXPOSURE. ACCIDENTAL DISCHARGE
DURING HANDLING OR INSTALLATION MAY CAUSE SERIOUS INJURY. BEFORE
ATTEMPTING TO INSTALL THIS DEVICE, READ AND COMPLY WITH INSTRUCTIONS,
WARNINGS, AND LIMITATIONS CONTAINED IN THIS MANUAL. DO NOT LIFT, CARRY
OR HANDLE BY THE SENSOR VALVE / DETECTOR. THE SENSOR VALVE / DETECTOR IS
VISUALLY DESCRIBED IN FIGURE 12 OF THIS MANUAL. DO NOT DROP. KEEP AWAY
FROM HEAT. KEEP AWAY FROM CHILDREN.
A SAFETY DATA SHEET (SDS) IS INCLUDED IN THIS MANUAL.
WARNING
PRIOR TO PERFORMING MAINTENANCE WITHIN THE PROTECTED COMPARTMENT,
ALWAYS INSTALL THE SAFETY PIN INTO THE SUPPRESSION SYSTEM TRIGGER
ASSEMBLY TO AVOID ACCIDENTAL DISCHARGE.
UPON COMPLETION OF MAINTENANCE, REMOVE THE SAFETY PIN FROM TRIGGER
ASSEMBLY, AND STORE THE SAFETY PIN IN THE HOLE OF THE RELEASE BRACKET
BEHIND THE ACTUATOR LEVER AS A BACK-STOP IN FARTHEST HOLE FROM
CABLE/HOOK ASSEMBLY.
Installation Manuals currently available in English, German, Italian, and Spanish. Other
languages available from your local distributor.
Installation Handbücher momentan verfügbar auf Englisch, Deutsch, Italiener, und
Spanisch. Andere Sprachen, die verfügbar sind von Ihrem örtlichen Verteiler.
Manuales de la instalación actualmente disponible en inglés, alemán, italiano, y
español. Otros idiomas disponibles de su distribuidor local.
Manuali di installazione attualmente disponibile in inglese, tedesco, italiano e
spagnolo. Le altre lingue disponibili dal suo distributore locale

PN: 123-330, Rev. F Page 3of 52
Table of Contents
Warnings..........................................................................................................................2
Application.......................................................................................................................4
Limitations .......................................................................................................................5
System Operations ..........................................................................................................8
Supervisory Pressure Switch.......................................................................................9
Switch Specifications ..................................................................................................9
System Status Indicator Light Operation ....................................................................9
Pressure Relief Assembly (Burst Disk).......................................................................10
Interaction with Engines, Generators and Powered Ventilation (Blowers) ..............10
Diesel Engines or Generators, Powered Ventilation (Blowers) ................................11
Gasoline Engines or Generators ...............................................................................11
Relationship to Portable Fire Extinguishers ..............................................................11
Manual Discharge Capability ....................................................................................11
Installation.....................................................................................................................12
I. Cylinder Installation ...............................................................................................12
Wall Mounting ..........................................................................................................13
II. Cable Assembly Installation ..................................................................................15
Test Procedure..........................................................................................................19
III. System Status Indicator Light Installation............................................................23
Installation Requirements .............................................................................................25
System Maintenance / Inspection.................................................................................26
Cylinder Inspection / Cylinder Testing ......................................................................26
Agent Weight Inspection ..........................................................................................29
Pressure Gauge Inspection .......................................................................................30
Reading the Pressure Gauge (Inspection).................................................................30
Pressure vs. Temperature Graphs ............................................................................31
System Status Indicator Light Inspection..................................................................31
Glass Bulb (Temperature Sensor) Inspection............................................................31
Cable Inspection........................................................................................................32
Specification Tables ..................................................................................................32
Table 6: NFG - Automatic and Manual/Automatic Fire Suppression Systems .....32
Table 7A: NFD - Automatic and Manual/Automatic Fire Suppression Systems...33
Table 7B: NFD Automatic and Manual/Automatic Fire Suppression Systems .....35
Two Year NFG and NFD Series Limited Warranty..........................................................36
Conditions......................................................................................................................36
Additional Servicing .......................................................................................................37
Out of Warranty Replacements / Recharges.................................................................37
Safety Data Sheets.........................................................................................................38
Installation Inspection Checklist....................................................................................46

PN: 123-330, Rev. F Page 4of 52
Application
FK-5-1-12 (1,1,1,2,2,4,5,5,5-NONAFLUORO-4-(Trifluoromethyl)-3- Pentanone), the
extinguishing agent used in all Sea-Fire NFG and NFD series fire suppression systems, is
a suitable EPA accepted alternate replacement for Halon. FK-5-1-12 is an electrically
nonconductive and residue free extinguishing agent that requires no cleanup. FK-5-1-
12 is also referred to as dodecaflouro-2-methylpentan-3-one, which is a fluoroketone.
These features and the versatility of design make the NFG and NFD series fire
suppression system models ideal for a broad range of applications. These applications
would include marine, commercial, and industrial use where electrical or flammable
liquids are the likely source of fire.
Sea-Fire NFG and NFD series have passed a rigid testing program and carry Factory
Mutual (FM Approvals) and United States Coast Guard (USCG) approvals for fire
suppression applications in marine pleasure craft, un-inspected vessels, and
Subchapter “T” inspected vessels, subject to the approval of the Local Officer in
Charge, Marine Inspection (OCMI). This would include many applications such as
unoccupied engine and generator rooms, electrical compartments, paint, and
flammable storage lockers.
FK-5-1-12 extinguishing agent is offered commercially by several chemical
manufacturers. Sea-Fire systems contain FK-5-1-12 product only from manufacturers
that are listed and approved by FM Approvals (FM).
Sea-Fire Marine offers all models compliant to applicable European Directives.
Systems will be shipped as requested.
•For orders requested compliant to Pressure Equipment Directive (PED) a
Declaration of Conformance (DOC) shall be included.
Sea-Fire Marine is pursuing the United Kingdom Pressure Equipment (Safety)
Regulations (PESR) 2016 approval. Due to the unpredictable nature of the UK PESR
being required for our application, throughout this manual the references to PESR or
UKCA marking are intended as future options and are not a declaration that systems
have this approval.
European and UK Markings:
•PED - Pressure Equipment Directive 2014/68/EU –CE mark
•PESR - Pressure Equipment (Safety) Regulation 2016 –UKCA mark

PN: 123-330, Rev. F Page 5of 52
Limitations
Sea-Fire NFG and NFD model series FK-5-1-12 automatic fire suppression systems are
designed and tested to extinguish Class B (flammable liquid) fires in enclosed
compartments only.
The Maximum (Max) area of coverage is based on the Minimum (Min) height box
footprint.
Table 1: Installations have the following enclosure limitations (feet)
Model
Minimum
height [ft]
Maximum
height [ft]
Max. Area of
coverage [ft2]
Max. Radial
Reach [ft]
NFG 25-75
2
6
37.5
8.7
NFG 76-100
2
14
100.0
14.1
NFD 101-825
2
14
412.5
28.7
NFD 826-1800
2
14
1024
35.8
Table 2: Installations have the following enclosure limitations (meters)
Model
Minimum
height [m]
Maximum
height [m]
Max. Area of
coverage [m2]
Max. Radial
Reach [m]
NFG 25-75
0.61
1.8
3.5
2.6
NFG 76-100
0.61
4.3
9.3
4.3
NFD 101-825
0.61
4.3
38.3
8.8
NFD 826-1800
0.61
4.3
95.1
10.9
Enclosure permeability and agent hold time:
The enclosure must be sufficiently sealed to retain the suppression agent for a period
of at least 15 minutes (Reference NFPA 2001, Sect 9.8.5). Any openings (doors or
hatches) will allow discharging agent to escape and will seriously affect the ability of
the agent to extinguish the fire.

PN: 123-330, Rev. F Page 6of 52
Enclosure pressure relief:
The discharge of extinguishing agent creates both a negative pressure when first
discharged and subsequently a positive pressure in the enclosure. For proper function
of the extinguishing agent and to avoid structural damage to the enclosure, these
pressure variations must be controlled. These pressures can be relieved via a room
pressure relief device. One guide to determine the required pressure relief device is
the FSSA Guide “Estimating Enclosure Pressure and Pressure Relief Vent Area for
Applications Using Clean Agent Fire Extinguishing Systems.” (www.fssa.net)
Ambient temperature:
Sea-Fire NFG and NFD model series fire extinguishers are designed and tested to
operate in the following temperature ranges:
NFG 25-100 Models: 20F (-7C) to 130F (54C)
NFD 101-825 Models: 20F (-7C) to 130F (54C)
NFD 826-1800 Models: 32F (0C) to 130F (54C)
Additional information is provided about the temperature effects on the extinguishing
agent pressure in the System Maintenance Section of this manual.
Sea-Fire NFG and NFD suppression systems are designed to induce a minimum
atmospheric concentration of 5.85% within the protected compartment. This is
equivalent to a 30% safety factor on a 4.5% Minimum Extinguishing Concentration
(MEC). In addition to gasoline and diesel fuel, other flammable liquids with MEC
values equal to or below 4.5% for FK-5-1-12 may be protected by Sea-Fire NFG and
NFD systems.
The specification tables in this manual list the minimum and maximum approved
compartment volume (size) allowable for each model (per NFPA 2001, UL 2166, FM
5600*). Volume can be determined by multiplying the compartment’s length x width
x height which equals the volume in ft³ or m³ (L x W x H = V).
*NFPA 2001: Standard on Clean Agent Fire Extinguishing Systems; UL 2166:
Halocarbon Clean Agent Extinguishing System Units; FM 5600: Approval Standard for
Clean Agent Extinguishing Systems
Models described in this manual are stock available in 25 ft³ (0.7 m³) intervals.
Systems are available in 1 ft³ (0.03 m³) intervals if desired. Exact calculations and/or
measurements of the protected space should be accomplished if ordering these
models. The Specification Table shows the area of protection range available for
ordering within each basic model. For simplicity, throughout this manual, only the
stock sizes will be noted.
NFG and NFD systems are designed for only one Cylinder (single nozzle) to protect the
entire space. Using two Cylinders to achieve combined coverage is not acceptable.

PN: 123-330, Rev. F Page 7of 52
CAUTION:
NEVER INSTALL A UNIT WITH A VOLUME RATING LESS THAN THE GROSS
VOLUME OF THE COMPARTMENT TO BE PROTECTED. DO NOT DEDUCT FOR
ENGINES, REMOVABLE TANKS OR OTHER EQUIPMENT.
Exception: If the boat manufacturer has placed a permanently affixed label in the
engine compartment specifying the gross volume less the volume of permanently
installed tankage, then this volume may be used to determine the proper size
suppression system. Check the Specification Table for proper application before
making installation.

PN: 123-330, Rev. F Page 8of 52
System Operations
Sea-Fire units described in this manual are automatically actuated by a temperature
sensitive UL listed glass bulb tested in accordance with *UL 199. These bulbs are
manufactured and tested to be activated at a minimum temperature.
•200°F (93°C) when immersed in a liquid bath or approximately 250°F (121°C)
when tested using an air bath.
•175°F (79°C) when immersed in a liquid bath or approximately 225°F (104°C)
when tested using an air bath.
The actual activation temperature of the bulb in a fire scenario is influenced by
numerous factors including air velocity, rate of temperature rise, air flow, location,
etc. The discharge temperature ranges (approximate) are shown in the Specification
Table 5 and 6, and on the label attached to each unit.
These systems have been tested to United States Coast Guard (USCG), UL 2166 and
FM 5600 requirements for Automatic Extinguisher Unit Automatic Operation Fire
Tests.
* UL 199: Standard for Safety of Automatic Sprinklers for Fire Protection Service.
Discharge Temperature Ranges (approximate):
NFG 25 –75: 200 - 250°F (93 - 121 °C)
NFG 76 –100: 175 - 225°F (79 - 107°C)
NFD 101 –1800: 175 - 225°F (79 - 107°C)
CAUTION:
IN CASE OF SUPPRESSION SYSTEM DISCHARGE, DO NOT IMMEDIATELY OPEN THE
PROTECTED COMPARTMENT. THE PROTECTED SPACE MUST BE KEPT CLOSED FOR AT
LEAST 15 MINUTES TO ALLOW THE FIRE TO BE EXTINGUISHED AND SURFACES TO
COOL SUFFICIENTLY TO PREVENT REFLASH. STOP BLOWERS AND SECURE HATCHES.
HAVE A PORTABLE EXTINGUISHER AVAILABLE AND USE CARE WHEN OPENING
COMPARTMENT.
CAUTION:
AVOID BREATHING FIRE RELATED FUMES OR VAPOR.
After a system discharge, one must observe all warnings before entering the hazard
area. Integrity must be maintained to prevent the migration of products of
decomposition to adjacent areas outside of the protected space.

PN: 123-330, Rev. F Page 9of 52
Only trained personnel with Self Contained Breathing Apparatus (SCBA) and
protection gear shall enter the space prior to ventilating for 15 minutes. When
ventilating the protected space of products of combustion, care should be taken to
allow smoke, decomposition products, etc., to clear the vessel, away from personnel,
muster stations, embarkation areas, etc. Upon arriving in port, qualified fire
suppression system maintenance personnel must perform post-fire maintenance.
Note: It is important to retain the designed vapor concentration within the
compartment to ensure a complete fire outage. Upon discharge, engine(s) and all
powered ventilation (blowers) must be shut down.
Supervisory Pressure Switch
•Sea-Fire NFG and NFD series suppression systems are equipped with a factory
installed pressure switch which is intended for Cylinder pressure monitoring and
supervision and may also be used to control other electrical functions (engine
shutdown, air exchange equipment etc.).
•When using the pressure switch as an electrical disconnect for any equipment
shutdown function, a means of overriding (bypassing, shunting) the pressure
switch must be provided to return the affected equipment to an operational
mode after suppression system discharge has occurred.
•The pressure switch is a single pole single throw (SPST) type that is normally
closed (NC) with the system in the charged condition. Discharge or loss of system
pressure will release the contacts to an open state thereby cutting off any
electrical current flow.
NEVER USE THE PRESSURE SWITCH FOR ELECTRICAL LOADS OVER ITS RATED
CAPACITY.
Switch Specifications
4.0 A at 12 VDC
2.0 A at 28 VDC
For applications requiring larger load capacities, contact the factory.
System Status Indicator Light Operation
All Sea-Fire pre-engineered fire suppression systems approved for marine applications
are packaged with an indicator light and faceplate. USCG approval requires that the
indicator light must be installed for system supervision and operator awareness at
each helmsman’s station. The basic light and panel, unless replaced by an upgraded
Sea-Fire Display Panel must be installed. When properly installed, activation of
electrical power to the system will illuminate the light indicating normal charge
condition. System discharge or loss of pressure will immediately turn off the indicator
light.

PN: 123-330, Rev. F Page 10 of 52
If the indicator light is not lit when power is applied, check for the following
conditions:
1. Check the pressure indicator gauge for proper range.
2. Check the fuse and indicator light and replace if defective (lamp replacements
available from factory).
3. Check for loose electrical connections.
4. Remove and weigh the system Cylinder as described in the System
Maintenance Section of this manual.
Table 3: Light Kit Available Options
Part No.
Description
130-117
12 VDC Green Light
130-118
24 VDC Green Light
130-394
12 VDC Green LED
130-395
24 VDC Green LED
Pressure Relief Assembly (Burst Disk)
All models are protected from over pressure of system.
NFG Models 25 –100 and NFD Models 101 –825 are protected by the design of the
glass bulb temperature / pressure relationship. Sea-Fire Marine maintains a
Department of Transportation (DOT) Special Permit, DOT-SP-11598 for these models.
NFD Models 826 –1800 have a definite purpose Pressure Relief Device (PRD) designed
and manufactured per CGA S-1.1 installed on the manifold. Do not remove or perform
any maintenance on this device. Removing or loosening this device will cause the
contents under pressure to escape. Only Sea-Fire provided PRDs are authorized for
use with these systems.
Interaction with Engines, Generators and Powered Ventilation (Blowers)
Sea-Fire offers optional engine interrupt systems which will automatically shut down
engines, generators, and powered ventilation upon discharge of the fire suppression
system. They are available with 4, 6, or 8 control circuits and operate between 9 –32
VDC. Shutdown may be accomplished by interruption of the electrical circuit between
the ignition switch and the engine coils.
It is the responsibility of the system designer / installer to comply with the following
instructions on Diesel and Gasoline Engines / Generators.