REMINDER: Sea-Fire 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.
SYSTEM OPERATIONS
Sea-Fire units described in this manual are automatically actuated by a heat actuated tube.
Discharge will occur as a result of direct flame impingement. The Sea-Fire FT system uses
the supplied length of temperature sensitive tubing as both detection and delivery system.
The tubing should be routed close to the hazard, where fire is likely to occur, but away from
heat sources that could accidentally cause it to operate. Upon flame impingement, the tubing
will rupture, and the extinguishing agent will discharge through the rupture point. No separate
discharge nozzle is needed.
CAUTION: IN CASE OF EXTINGUISHER DISCHARGE, DO NOT RUSH TO OPEN THE
PROTECTED COMPARTMENT. LET THE EXTINGUISHING AGENT WORK FOR SEVERAL
MINUTES. HAVE A PORTABLE EXTINGUISHER AVAILABLE AND USE CARE WHEN
OPENING THE COMPARTMENT.
AVOID BREATHING FIRE RELATED FUMES OR VAPOR.
NOTE: It is important to retain the designed vapor concentration within the compartment to
insure complete fire outage. Upon discharge, all powered ventilation (blowers) must be shut
down.
PRESSURE SWITCH
Sea-Fire “FT” series extinguishers are equipped with a factory installed pressure switch which
is intended for cylinder pressure supervision and may also be used to control other electrical
functions (engine shutdown, air exchange equipment, electric supply, 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
in order to return the affected equipment to an operational mode after extinguisher 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 PRESSURE SWITCH FOR ELECTRICAL LOADS OVER RATED CAPACITY.
SWITCH SPECIFICATIONS
4.0 AMPS AT 12 VDC
2.0 AMPS AT 28 VDC
For applications requiring larger load capacities, see OPTIONAL EQUIPMENT section IN
THIS manual or contact factory.
DIESEL ENGINES
Continued operation of diesel engine(s) and or powered ventilation units will deplete the
extinguishing agent and may cause a fire re-flash. Diesel engine(s) must be automatically
shutdown upon extinguisher discharge.
Note: Power ventilation (blowers) that exceeds one air change per minute within the protected
compartment must be automatically shutdown upon extinguisher discharge.*
*ABYC requirement - Standard A-4
GASOLINE ENGINES
WARNING: GASOLINE ENGINES AND FANS SHOULD BE AUTOMATICALLY OR
MANUALLY SHUT DOWN AT TIME OF DISCHARGE.
Shutdown may be accomplished by interruption of the electrical circuit between the ignition
switch and the engine coils.
NOTE: Sea-Fire optional engine interrupt systems will automatically shut down engines and
powered ventilation upon discharge of the fire SUPPRESSION system. They are available in
12 and 24-volt models with 3, 5 or 8 control circuits, refer to OPTIONAL EQUIPMENT section
in this manual.
3
