FIRE AND SMOKE DETECTION PANEL - TM-55-1925-292-14-P0054

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TM 55-1925-292-14&P

There are 15 24-volt ionization smoke detectors in various locations throughout the vessel. The 24- volt ioniza-

tion smoke detectors contain a set of normally open contacts that close when smoke is detected. When the

contacts are closed, the fire and smoke detection panel in the EOS detects the condition and sounds the alarm.

There are three thermal heat detectors. One each is located in the Emergency Diesel Generator (EDG) room,

the galley, and the crew's mess/recreation area. The thermal heat detectors are similar to the smoke detectors

except the contacts close when a temperature of 135 F (55.2 C) is sensed.

The fire alarm system sounds two system bells and energizes a beacon. One bell is located in the pilothouse,

and the other one is in the EOS. The beacon is mounted in the radio room. The bells and beacon are provided

as an independent indication of a fire alarm condition.

The fire alarm system is capable of detecting heat and smoke. It relies on various sensors placed throughout

the vessel to detect the alarm condition. The sensors are grouped into four zones on the vessel (Refer to figure

4):

Zone 1

Pilothouse and radio room

Zone 2

01 level and Emergency Diesel Generator (EDG) room

Zone 3

Boatswain's store, main deck passageway, galley, and crew's mess area

Zone 4

Auxiliary Machine Space (AMS) 1, engine room, AMS 2, and towing gear locker

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