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.

PN: 123-330, Rev. F Page 11 of 52
Diesel Engines or Generators, Powered Ventilation (Blowers)
USCG and American Boat and Yacht Council (ABYC) –Standard A-4, Fire Fighting
Equipment (Section A-4.7.3.3) both require the following:
The system shall be designed and installed so that the engine(s),
generator(s), and blower(s) located in the protected space shut down
automatically and after discharge the minimum required design
concentration (5.85 % FK-5-1-12) must remain.
Gasoline Engines or Generators
It is optional to automatically shut down gasoline engines and generators, but it is
highly recommended. In the case of engine compartment fire, you must still manually
shut down engine(s) or generator(s) before manual discharge, or immediately after
automatic discharge of the fire suppression system.
Relationship to Portable Fire Extinguishers
Sea-Fire pre-engineered systems shall be considered as supplementary to the number
of portable fire extinguishers required on-board and are designed and intended for
enclosed unoccupied compartment installations that are not subject to direct weather
or water.
Manual Discharge Capability
US Coast Guard approval requires the installation of manual discharge capability on all
systems installed in compartments of 1,000 ft³ and larger. Sea-Fire offers manual
discharge cables for this purpose. Models with manual cable connections are
designated as “M”following the system size. “M” designates manual/automatic. “A”
alone designates automatic only.
Table 4: Cable Assembly Part Numbers
Part Number
Description
136-0###
Cable Assembly, SMAC, XXX ft: Bidirectional Pull with Manual /
Auto Face Plate
136-2###
Cable Assembly, SMAC, XXX ft: Bidirectional Pull with Manual /
Auto Face Plate and Fire-Resistant Sleeve
Only Sea-Fire cables are authorized for use with Sea-Fire suppression systems. Sea-
Fire cables are offered in lengths from 1 ft to 100 ft (0.3 m to 30.5 m).

PN: 123-330, Rev. F Page 12 of 52
Installation
READ THE ENTIRE INSTRUCTION MANUAL AND CYLINDER NAMEPLATE PRIOR TO
INSTALLATION.
These installation instructions are intended to cover most normal installations.
Additional technical or application information can be obtained by contacting:
Sea-Fire Marine - USA Sea-Fire Europe, LTD
9351 G Philadelphia Rd. or Unit D2
Baltimore, Maryland Discovery, Voyager Park
Tel: [phone] Portfield Rd.
Website: www.Sea-Fire.com Portsmouth, Hants
PO3 5FN, United Kingdom
Tel: [phone]
Website: www.Sea-Fire.co.uk
Only one system (Cylinder) may be used to protect a compartment. If more than one
suppression system is used to achieve the required amount of agent concentration,
there is no guarantee that several suppression systems will actuate simultaneously as
each suppression system operates independently. Several suppression systems may
be used only if each independent suppression system can protect the entire volume of
the compartment.
CAUTION:
1. DO NOT INSTALL IN AN AREA DESIGNATED FOR OCCUPANCY.
2. ACCIDENTAL DISCHARGE MAY CAUSE SERIOUS INJURY.
3. HANDLE THE CYLINDER WITH EXTREME CARE.
4. WEAR EYE PROTECTION.
5. DO NOT LIFT OR CARRY THE CYLINDER BY THE MANIFOLD OR
ACTUATOR COMPONENTS.
6. DO NOT ATTEMPT TO LOOSEN OR REMOVE ANY SUPPRESSION SYSTEM
COMPONENTS.
I. Cylinder Installation
Step 1 Carefully remove Cylinder from carton and visually check for damage in
shipment.
Step 2 Loosen the mounting Bracket Cylinder holding straps and remove the
Cylinder from the bracket. Although the Sensor Valve / Detector is protected,
care should be exercised to avoid striking the Sensor Valve / Detector.
•For models with a bolted-on valve guard, remove the guard once the
cylinder is at its final location.

PN: 123-330, Rev. F Page 13 of 52
Step 3 Best practices:
Do Place Unit:
Do Not Place Unit:
a. As high as possible, no more than 3
feet below the ceiling, on
compartment bulkhead for
mounting.
b. With detector head near the area
in which a fire is most likely to
occur. This would be on the fuel
line side of the engine, near the
carburetor, or fuel pump.
c. At the centerline of the bulkhead
wall (left to right).
d. Against the forward bulkhead.
e. Vertical or horizontal as described
per model.
f. Between the engines when two
engines are to be protected.
g. Avoiding immediate obstructions to
the discharge orifices.
a. Near a fresh air or ventilation duct
supply opening.
b. Near an access door.
c. Underside or inside of an access
door or panel.
d. Extremely close to the turbocharger
or exhaust system.
e. Where an accumulation of standing
water could block sensor or cause
corrosion.
f. On the underside of a cover or
compartment hatch that could be
thrown clear due to possible
explosion.
g. On a ceiling.
h. Too close to a room corner or large
obstruction.
WARNING:
FAILURE TO FOLLOW THESE INSTALLATION INSTRUCTIONS MAY RESULT
IN SYSTEM FAILURE.
Step 4 To ensure that the Cylinder is operational, both the weight and pressure
indicator must conform to the Cylinder specification as shown on the
nameplate. Weigh the Cylinder (less the Bracket) on an accurate calibrated
scale before installing. Record the date and weight on the tag provided for
this purpose.
Wall Mounting
Models NFG 25 - 100 and NFD 101 –825 may be installed vertically or horizontally
with the following angular / off-set limitations. Vertical installation is recommended
for optimum performance. The off-set is defined as the distance below the level line
from the end of the Bracket. The discharge orifice spray pattern must be oriented
away from the wall and towards the room.

PN: 123-330, Rev. F Page 14 of 52
Models NFG 25 - 100
•Vertical installation.
•Horizontal with a minimum 8°
angle or 1” (25.4mm) offset
below level.
Models NFD 101 - 200
•Vertical installation.
•Horizontal with a minimum 5°
angle or 1/2” (12.7mm) offset
below level.
Models NFD 201 - 825
•Vertical installation.
•Horizontal with a minimum 2.5°
angle or
1/2” (12.7mm) offset below
level.
Models NFD 826 –1800
•Vertical Installation Only
WARNING:
WHEN INSTALLING CYLINDER IN HORIZONTAL POSITION, THE ACTUATOR (TOP OF
CYLINDER) MUST NEVER BE LOWER THAN THE BOTTOM OF THE CYLINDER OR
PROPER DISCHARGE OF AGENT WILL NOT OCCUR (SEE Figure 1 ABOVE).
Step 5 Locate the Bracket in the desired position (Vertical - Sensor Valve / Detector
Head up, or horizontal (Figure 1). Ensure the bulkhead or mounting surface is
solid enough to hold the weight of the unit. Fasteners are not included. Use
medium strength (Grade 5, Property Class 8.8) or better grade material.
oFor bracket PN: 130-249 and PN 130-805 (small holes) the minimum
fastener size is 1/4” (M6) diameter.
oFor all other bracket assembly part numbers the minimum size
fastener is 5/16” (M8) diameter [recommend 3/8” (M10) diameter].
Four (4) fasteners must be utilized for each bracket. See Table 5 for the
quantity and hole sizes for each respective Bracket.
Using the Bracket as a template, mark and drill holes in the bulkhead and
install the Bracket ensuring that all fasteners are thoroughly tight.
Figure 1: Horizontal Mounting

PN: 123-330, Rev. F Page 15 of 52
Step 6 Carefully attach the Cylinder to the Bracket. The Sensor Valve / Detector
Head should point towards the engine or the center of the compartment.
The nameplate and gauge should be visible. Tighten the bracket straps so
that the Cylinder body is firmly and securely held in place by its bracket
(worm drive clamps must be torqued to 75-85 in-lb, (6-7 ft-lb)). Ensure that
the 180° discharge orifices do not face the wall.
Depending on the model, the Bracket Strap will be one of 2 different types:
•Screw drive coil, Philips / hex drive ---------- NFG 25 –100 and NFD 101 - 825
•Two-piece bracket / saddle assembly -------- NFD models 826 - 1800
Table 5: Brackets
II. Cable Assembly Installation
CAUTION:
TO AVOID KINKING OF CABLE, DO NOT PUSH CABLE TO RETRACT THE CORE.
CAUTION:
TO PREVENT ACCIDENTAL DISCHARGE DURING CABLE INSTALLATION, VERIFY THAT
THE MANUAL DISCHARGE LEVER SAFETY PIN IS PROPERLY INSTALLED (SEE FIGURE 8).
Step 1 Select the proper location for remote pull station.
a. Manual discharge release pull stations should never be installed in the protected
compartment.
b. Locate discharge pull handle at the helm station with full view and easy access by
the operator.
c. The area selected must be structurally secure and provide at least 12”(305 mm)
of clearance at the rear of the panel to facilitate cable hardware.
Model
Assembly
Mounting
Holes
(Qty x Dia)
Model
Assembly
Mounting
Holes
(Qty x Dia)
NFD 101 - 200
130-250
4 x .39”
(9.9 mm)
NFG 25
130-249
2 x 0.29”
(7.2 mm)
NFD 201 - 300
130-251
NFD 301 - 400
130-252
NFG 26 - 75
130-775
4 x 0.39”
(9.9 mm)
and
4 x 0.22”
(7.1 mm)
NFD 401 - 525
130-253
NFD 526 - 675
130-254
NFD 676 - 825
130-777
6” x 0.39”
(9.9 mm)
NFG 76 - 100
130-805
NFD 826 - 1800
130-009
13 x 7/16”
(10.7 mm)

PN: 123-330, Rev. F Page 16 of 52
Step 2 Install the cable along the routing between cable ends.
a. Do not install the cable in an area where the possibility of physical abuse is likely.
Where practical, follow the same cable path as installed by the boat manufacturer
(if a replacement cable).
b. Route the cable to allow it to lie in its most natural state. The cumulative bend in
the cable run must never exceed 720°. This is equivalent to eight right (90°)
angles. Use extreme care when bending cable to avoid kinking. Never form a
bend with a radius of less than 5”(127 mm). Selection of the correct size Sea-Fire
cable length will reduce excess cable coil.
c. Position the cable in its routing, but do not secure currently. Steps 3A thru 3F
must be completed prior to securing cable in its final location.
•Do not connect cable to the Cylinder currently.
NOTE:
The cable may be installed from either direction using the existing Bi-Directional
hardware installed on the system.
Fire Resistant Sleeve, PN: 138-2XX to protect cables from short term exposure up to
500°F (260°C) is available. Contact the factory or an authorized distributor for
additional information.
Step 3 Mounting cable faceplate and release T-Handle.
Confirm the faceplate supplied with cable and/or the Cylinder Assembly. The
faceplate heading should be “MANUAL/AUTOMATIC” (See Figure 2).
Figure 2: Manual / Automatic Systems Use Faceplate 124-026
a. Using the manual discharge faceplate (Figure 2) as a template, mark and drill a
13/32”(10.4 mm) hole.
b. Remove the protective backing from the faceplate. While aligning the holes,
place even pressure upon the faceplate. To ensure a good bond, the temperature
should be more than 50°F (10°C).

PN: 123-330, Rev. F Page 17 of 52
c. Following the diagram in Figure 3, install the jam nut and lock washer on the cable
end-outer. Screw the jam nut to the end of the threads. Insert the cable end
through the panel and faceplate hole. Pull the cable end-inner (threaded shaft)
out to its fullest travel. Install ferrule by screwing onto the cable end-outer until it
bottoms out. Use pliers on the back side, holding the cable end-outer while
turning the ferrule. Use pliers with rubber tips or another non-scratching grip. Do
not over tighten.
Figure 3: Faceplate Installation
d. Pull the cable end-inner (threaded shaft) out to its fullest travel and slide the
rubber O-Ring over the threads on the shaft. Hold the cable end-inner from
rotating by using the safety pin in the cross hole or by using needle nose pliers.
Install the T-Handle on the cable end-inner, screwing it on until it bottoms out.
Do not over tighten. Remove the safety pin from the cable end-inner.
Figure 4: T-Handle Installation
Safety pin
T-Handle
O-Ring
Ferrule

PN: 123-330, Rev. F Page 18 of 52
e. Pull on the Cylinder (S-Hook) end of the cable to retract the handle into the
Ferrule. It may be necessary to softly push on the T-Handle at the same time to
seat the O-Ring. Align the cross holes in the T-Handle and ferrule and insert the
safety pin through both items so that the end of the safety pin shows out the far
side of the Ferrule.
CAUTION:
THE SAFETY PIN MUST BE THROUGH THE RED T-HANDLE AND NOT THE
CABLE END-INNER, REFERENCE FIGURE 5.
Figure 5: Safety Pin
Leave the safety pin inserted through the T-Handle / Ferrule, but do not install the
red safety seal at this time.
f. Turn the T-Handle / Ferrule so that the word “FIRE”is vertical or oriented as
needed.
Note: This action will result in the entire cable rotating along its length.
g. Ensure that the cable can rotate and remain in a natural state.
h. Tighten the jam nut behind the instrument panel to lock in the position and
orientation of the T-Handle / Ferrule.
Step 4 Securing cable in place.
a. Secure the cable along its length.
i. Nylon cable ties should be used for cable securing. Fasten and support the
cable on straight runs only. Do not secure at locations where cable bends.
ii. At the Cylinder/actuator S-Hook end:
a) The cable should have a minimum straight length of 6”(15 cm) before
making any bends. The cable should be secured on a straight run before
making a bend.
b) The cable should be secured within 6”to 18”(15 cm –46 cm) of the
Cylinder. Some flexibility will be needed to move the cable for servicing
the Cylinder.

PN: 123-330, Rev. F Page 19 of 52
CAUTION:
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY PLACE UNDUE PRESSURE ON THE
HAIRPIN COTTER PIN, CAUSING IT TO MALFUNCTION.
iii. Do not install cables with other wiring. Do not use tie wire around the cables.
b. Temporarily remove the safety pin and test the cable operation. Never push
cable. Pull the cable from the Cylinder (S-Hook) end, then, pull the T-Handle and
repeat. The cable must move freely without friction or binding. Reinstall the
safety pin and confirm that the release handle is now locked in place.
CAUTION:
ACCIDENTAL DISCHARGE DURING HANDLING OR INSTALLATION MAY CAUSE
SERIOUS INJURY. DO NOT REMOVE FACTORY INSTALLED SAFETY (PULL) PIN FROM
CYLINDER SENSOR VALVE / DETECTOR UNTIL INSTALLATION IS COMPLETED AND
CHECKED.
Step 5 Installation Verification and Test Requirement.
Specification / Regulation
•USCG –Navigation and Vessel Inspection (NVIC 6-72, Section V, Page 71) requires
a maximum of 40 lb of force required at the T-Handle (pull station) to activate
system discharge.
•UL 2166 –Standard for Clean Agents, Section 42 requires a pull station shall not
require a pull of more than 178 N (40 lbf).
•NFPA 2001, Section 4.3 requires “Manual Controls shall not require a pull force of
more than 40 lb (178 N) nor a movement of 14 inches.
•Sea-Fire: minimum of 10 lb of force required at the S-Hook (extinguisher) to
activate system discharge.
Test Procedure
CAUTION:
DO NOT PUSH THE (FIRE) T-Handle while installing the Cable Assembly to
avoid kinking the cable core. Pull the S-Hook at the opposite end to retract the
T-Handle.
After the initial routing of the Cable Assembly is completed:
a. Attach a scale (PN: 128-212 Cable Test Fixture) to the S-Hook (Cylinder end) in
place of the Cylinder Release assembly.

PN: 123-330, Rev. F Page 20 of 52
b. Attach a scale (PN: 128-092 Digital Scale) to the T-Handle (pull station) end of the
cable assembly. A Testing Hook, PN: 128-115 is available to facilitate attaching
the scale. (Scales available from Sea-Fire or others may be used)
c. Pull on the T-Handle scale, monitoring the displayed force, until 10 lb (4.5 kg) is
shown on the S-Hook (Cylinder end) scale.
d. Ensure that the required force at the T-Handle (pull station) does not exceed 40 Ib
(18.2 kg) to achieve 10 lb (4.5 kg).
i. If less than 40 lb (at the pull station) of force achieves the 10 lb (at the
Cylinder), complete the cable assembly installation per Step 6.
ii. If greater than 40 Ib of force was exerted to achieve 10 lb, the cable routing
must be inspected and likely changed. Repeat the inspection until less than
40 lb achieves that 10 lb (at the Cylinder).
e. Remove both scales. Pull on the S-Hook at the Cylinder to retract the cable.
f. Reinstall safety pin and confirm that release handle is now locked in place.
g. Attach the tamper resistant round plastic tie to the safety pin by passing the tie
through the safety pin ring and around the cable assembly. Insert the end of the
tie into cable end and pull up snug. The tie provides a means of deterring
accidental discharge and determining if manual actuation has occurred.
CAUTION:
DO NOT USE NYLON CABLE TIES IN PLACE OF THE TAMPER RESISTANT TIE FOR
SAFETY PIN.
Note: Limit the quantity and tightness of tie downs to avoid restriction.
A maximum of 720° in turns, and no less than 5”(127 mm) of radius per turn
should be utilized.
Step 6 Connecting the cable assembly to the Cylinder (Figure 7).
Note: The cable may be installed from either direction using the
existing Bi-Directional hardware installed on the system.
a. Confirm that the Cylinder is mounted in its bracket, the cable pull handle end is
installed and the cable is correctly routed to the Cylinder.
b. Insert the S-Hook (Figure 6-A) into the actuator lever from the front side (over top
of the 2 mounting screws in the Release Bracket (Figure 7-B). After the S-Hook is
connected to the lever, align the groove in the cable end-outer (Figure 6-B) with
the slot in the Release Bracket assembly (Figure 7-C).
c. Insert the Hairpin Cotter Pin provided with the cable into the release bracket, over
top of the cable end (Figure 7-D).
•There may be a slight bend (bump) in the cable between where it is
attached to the actuator lever and where the cable end - outer is clipped
into the Release Bracket. This is normal.