DIRECT SUPPORT MAINTENANCE
FIREFIGHTING, FIRE ALARM, AND FIRE SUPPRESSION SYSTEMS FOR
INLAND AND COASTAL LARGE TUG (LT)
FIRE DETECTION SYSTEM, REPAIR
Tools and Special Tools:
Tool Kit, General Mechanic's (Item 1, Table 2,
Multimeter (Item 3, Table 2, WP 0046 00)
Tag, Danger (Item 8, Table 1, WP 0050 00)
Set to OFF the FIRE DETECTION SYSTEM. cir-
Two Watercraft Engineers, 88L
cuit breaker in 120V emergency distribution
panel No. 1. Lock out and tag out (FM 55-502).
1. Using the proper key, OPEN the door to the fire and smoke detection panel.
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. Remove the fuse cover (figure 1, item 1) from the plastic retaining pins (figure 1, item 2).
3. Take voltage readings with a multimeter at the PS-35 TB-1 terminals 1, 2, and 3 (figure 1, item 3). If voltage
is present, verify that the correct circuit breakers are OFF, locked out, and tagged out (FM 55-502). If no
voltage is present, continue with the procedure.