FIREFIGHTING, FIRE ALARM, AND FIRE SUPPRESSION SYSTEMS FOR
INLAND AND COASTAL LARGE TUG (LT)
FIRE DETECTION SYSTEM, TEST
Tools and Special Tools:
Tool Kit, General Mechanic's (Item 1, Table 2,
DA Form 4640
DA Form 4993
Heat Gun (Item 15, Table 2, WP 0046 00)
Smoke (Item 7, Table 1, WP 0050 00)
Set to ON the FIRE DETECTION SYSTEM. circuit
breaker in 120V emergency distribution panel
Two Watercraft Engineers, 88L
OPEN the fire detection panel and have the key
IONIZATION SMOKE DETECTOR TESTING
Prior to initiating the ionization smoke detector test, notify the proper personnel that a
test will be performed so that any alarm soundings can be ignored during the test
1. Activate an ionization smoke detector (figure 1, item 1) by discharging a 1 to 2 second blast of smoke
(figure 1, item 2) at one of the smoke detectors.
2. Observe that the following events occur:
a. The ionization smoke detector Light Emitting Diode (LED) (figure 1, item 3) illuminates.
The fire detection panel has a green and red LED for each zone. The green LED indi-
cates the system is operating normally and the red LED indicates an abnormal condition
in the zone. A red LED requires an investigation by the crew to determine the cause of
the abnormal condition.
b. The audible alarm bell (figure 2, item 1) sounds in the Enclosed Operating Station (EOS) and the proper
zone LED (figure 2, item 2) illuminates on the fire detection panel (figure 2, item 3).
The audible alarm bell sounds in the pilothouse (figure 3, item 1) and the proper zone indicator (figure 3,
item 2) illuminates on the remote indicating panel (figure 3, item 3).
3. Press the ALARM SILENCE switch (figure 4, item 1) on the CP-35 CONTROL UNIT (figure 4, item 2) and
observe the following:
a. The audible alarm bell (figure 2, item 1) has silenced in the EOS.
b. The audible alarm bell (figure 3, item 1) has silenced in the pilothouse.
The ALARM FLASHING WHEN SILENCED LED (figure 4, item 3) on the CP-35 CONTROL UNIT
(figure 4, item 2) is flashing.