Carbon Dioxide and Halon Gas Release (CKT FR)

circuitry may be verified with its test circuit, as

dual system, one for the magazine inner structure and

previously described.

one for the outer.

Power supplies for the bearing and stator

For each machinery space, auxiliary machinery

indicating and alarm circuit associated with the

room, and the engine room, a pressure switch (manual

electric plant control console are taken from the

reset) is installed in the Halon actuating line at the

console. Power supply for the circuits associated with

remote actuating station in the CCS. This switch

the IC/SM alarm switchboards is taken from these

actuates the following:

switchboards.

-- An alarm module on the circuit F alarm

switchboard in the damage control area of the

CARBON DIOXIDE AND HALON

CCS, operation of which has been previously

GAS RELEASE (CKT FR)

described

Circuit FR provides a means of indicating when

-- Audible alarms, type IC/B3S4 bells, in the

carbon dioxide or Halon gas is released in compart-

machinery space protected

ments protected by a fixed-gas, fire-extinguishing

system. This system is classified as nonvital readiness

A rotating red beacon in the space protected

class 1.

-- A two-dial lamp-type indicator (red ALARM

Two dial lamp indicators with red lens or white

and white POWER-ON lenses) outside each

lens are installed at the access to each compartment

access to the protected space

that is to be monitored and at the local actuating

A rotary snap switch is installed at each local

stations for machinery spaces and the gas turbine

Halon actuating station that will silence the audible

enclosures.

signals and maintain the red light at each access until

Single lamp-type indicators (red HALON RLSE

reset.

lens) are installed at the local actuating station for all

of the diesel enclosures, the flammable liquid

Pressure switches, one each in the discharge lines

storeroom, and the paint mixing and issue room.

of the primary and reserve banks of Halon cylinders,

energize a two-dial lamp-type indicator (two red

Bells, types IC/B2S4 (EXP) and IC/B3S4 are

lenses--HALON RLS PRI and HALON RLS RSV)

installed in the protected spaces.

located at each local actuating station and on the

Rotary flashing red beacons are installed in the

damage control console in the CCS.

machinery spaces to supplement the bells, due to the

The installation for each ship's service diesel

high noise levels.

generator enclosure consists of a pressure-operated

Alarm modules of the circuit F-type IC/SM

switch (manual reset) in the Halon actuating line in the

switchboard in the damage control area of the CCS are

CCS, which energizes the following when the gas is

assigned to this system.

released:

Switches at the PCC activate the GT Halon

-- Alarm signals on the alarm switchboard for

system, Switches at the turbine enclosure energize a

circuit Fin the damage control area of CCS

Halon ready indicator at the console.

-- A type IC/BS4(EXP) bell within the space

A separate installation is provided for each

compartment protected. The protected compartments

-- A two-dial lamp-type indicator (red ALARM

are the Mk 13 Mod 4 GMLS magazine, auxiliary

lens and white POWER-ON lens) installed

machinery rooms No. 1, 2, and 3, SS diesel generator

outside of each access to the protected space

enclosures No. 1, 2, 3, and 4, the engine room, the

A rotary snap switch is installed at the local Halon

flammable liquids storeroom, the gas cylinder

actuating station to de-energize the audible alarm

storeroom, and the paint mixing and issue room,

within the space while retaining the red light at the

The configuration of the system and number of

access.

systems a compartment may have will depend on the

A pressure switch in the discharge line of the

size of the compartment, the equipment in the

Halon bank energizes a single dial (red HALON RLS

compartment, and the purpose of the compartment.

lens) lamp-type indicator at the local Halon actuating

For example, the Mk 13 Mod 4 GMLS magazine is a

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