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TM 55-1905-223-24-18-1
1-23.  Bilge/Ballast and Firemain Piping System.  The bilge/ballast and firemain
piping systems remove accumulated water from the bilges, transfers seawater to and
from seawater ballast tanks, and supplies seawater to the firemain, countermeasure
washdown (CMWD), and AFFF foam proportioners.
a.  Bilge/Ballast Piping System.  The bilge/ballast piping system (FIGURE 1-10)
draws bilge water from selected ship bilges and discharges it overboard. The system
also draws seawater from the sea chest and distributes it to selected ballast
(seawater) tanks and draws seawater from the ballast tanks and discharges it
overboard, or to another ballast tank.  In an extreme emergency, the bilge/ballast
piping system can be aligned to supply ballast water to the firemain.  System
control is maintained through a combination of valves as shown in FIGURE 1-14. The
system consists of the bilge/ballast pump, bilge manifold, and ballast manifold.
Power for the bilge/ballast pump is supplied from the main switchboard 240 Vac
distribution panel and controlled by start and stop pushbuttons on the engine room
console.
b.  Fire Main and Foam Piping System.  The fire main and foam piping system
(FIGURE 1-11) draws seawater from the sea chest to pressurize the fire main,
countermeasure washdown (CMWD), and AFFF foam proportioners.  System control is
maintained through a combination of valves as shown in FIGURE 1-11. The system
consists of fire pumps No. 1 and No. 2, and auxiliary fire pump. The fire main
supplies seawater to fire stations, the countermeasure washdown station, and the
AFFF foam proportioners.  Power to fire pumps No. 1 and No. 2 is supplied by the
main switchboard 240 Vac distribution panel.  Control of the pumps is provided from
start and stop pushbuttons adjacent to the pumps or from stop and start pushbuttons
on the engine room console.  The auxiliary fire pump will also pressurize the fire
main.  This pump is powered by the bowthruster/auxiliary fire pump diesel engine.
1-24.  Seawater Cooling Piping System.  The seawater cooling piping system (FIGURE
1-12) provides seawater for cooling and air conditioning units AC-1, AC-Z, and AC-3.
Seawater is also provided to the port and starboard stern tubes for lubrication,
cooling, and flushing and to the marine sanitation device.  System control is
maintained through a combination of valves as shown in FIGURE 1-12.  The system
consists of the auxiliary seawater cooling pump and a duplex strainer in the piping
drawing seawater from the sea chest.  The seawater regulating valves located in the
emergency generator room provide a constant air conditioner condenser cooling water
pressure.  The seawater cooling pump receives power through the auxiliary machinery
motor control center with a RUN indicator lamp on the EOS.
1-25.  Hydraulic Oil Supply Piping System.  The hydraulic oil supply piping system
(FIGURE 1-13) replenishes the hydraulic oil storage tank and supplies hydraulic oil
to supply points in the following compartments:  boatswain storeroom, bowthruster
room, and steering gear room.  The supply points provide hydraulic oil for the
following:
a.  Boatswain Storeroom.  Bow ramp winch hydraulic power pack and starboard bow
anchor windlass hydraulic power pack.
b. Bowthruster Room.  Port bow anchor windlass hydraulic power pack and
bowthruster hydraulic power pack.
c. Steering Gear Room.  Port side - Steering gear hydraulic power pack and
Starboard side - Stern anchor winch hydraulic power pack.
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