FIRE DETECTION SYSTEM, REPLACE - TM-55-1925-292-14-P0211

TM 55-1925-292-14&P

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UNIT MAINTENANCE

FIREFIGHTING, FIRE ALARM, AND FIRE SUPPRESSION SYSTEMS FOR

INLAND AND COASTAL LARGE TUG (LT)

FIRE DETECTION SYSTEM, REPLACE

INITIAL SETUP:

Tools and Special Tools:

References:

Tool Kit, General Mechanic's (Item 1, Table 2,

FM 55-502

Multimeter (Item 3, Table 2, WP 0046 00)

Materials/Parts:

Tag, Danger (Item 8, Table 1, WP 0050 00)

Equipment Conditions:

Set to OFF the FIRE DETECTION SYSTEM. cir-

cuit breaker in 120V emergency distribution

Personnel Required:

panel No. 1. Lock out and tag out (FM 55-502).

Two Watercraft Engineers, 88L

IONIZATION SMOKE DETECTOR REPLACEMENT

REMOVAL

1. Turn the ionization smoke detector cover (figure 1, item 1) slightly counterclockwise and remove.

WARNING

Take great care when working around electrical equipment. Contact between

unprotected body parts and electrical conductors can cause serious injury or

death. Do not wear jewelry or other conductive items while servicing energized

electrical equipment. Failure to comply with these precautions can cause seri-

ous injury or death.

2. Take voltage readings with a multimeter at the terminals (figure 1, item 2) to ensure that the electrical circuits

are deenergized. If voltage is present, ensure that the proper circuit breakers are OFF, locked out, and

tagged out (FM 55-502). If no voltage is present, continue with the procedure.

3. Label and disconnect the electrical wiring (figure 1, item 3) from the terminals (figure 1, item 2). If an end of

line device (capacitor) (figure 1, item 4) is connected to the terminals, remove the capacitor and set it aside

for later installation.

4. Remove the two screws (figure 1, item 5) that secure the ionization smoke detector back plate (figure 1, item 6)

to the junction box (figure 1, item 7).

5. Remove the ionization smoke detector back plate (figure 1, item 6).

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