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 TM 55-1905-242-14
0012 00
Accommodation Module Ventilation
Accommodation module ventilation is provided by two blowers mounted in the accommodation module bulkheads aft of
frame 23, port and starboard. These blowers force air out of the accommodation module. Natural ventilation is provided by
two vents in the overhead, port and starboard, aft of frame 27. Additional natural ventilation is provided by vents located in
the forward bulkhead of the accommodation module, port and starboard. All four of these natural vents may be opened and
closed as required by conditions. The blowers are powered by the vessel's 24 Vdc electrical system through the control and
distribution panel in the pilothouse.
Battery Compartment Ventilation
Battery compartment ventilation is provided by an explosion proof blower mounted in the accommodation module bulkhead
aft of frame 30, starboard. The blower draws air out of the battery compartment through a flexible vent hose and exhausts
it to the atmosphere outside the accommodation module. Because of the potential for explosive gas generation caused by the
charging/discharging of the batteries, this fan normally runs at all times. The blower is powered by the vessel's 24 Vdc
electrical system through the control and distribution panel in the pilothouse.
Water Closet Compartment Ventilation
The water closet compartment is ventilated by a blower mounted under the pilothouse deck. The blower's intake draws air
through the aft bulkhead of the water closet compartment and exhausts it through a port in the pilothouse base at frame 34,
starboard. The blower is powered by the vessel's 24 Vdc electrical system through the control and distribution panel in the
pilothouse. Fan operation is controlled by a door switch and timer. When the water closet door is closed, the blower begins
to run. After the blower has run for five minutes, the timer shuts it off. The timer resets when the water closet door is opened.
Engine Room Ventilation
The engine room is ventilated by two blowers mounted in the engine room overhead aft of frame 35. These blowers draw air
from the engine room. Fresh air is supplied to the engine room through intake ducts located on bulkhead 31, port and
starboard. Both the intake and the exhaust ducts have fire flaps to permit the operator to secure all air flow to the engine
room in case of fire. The exhaust duct is manually controlled from the aft deck, while the intake ducts are controlled from
the pilothouse by means of T-handle controls. Power for the blowers is derived from the vessel's 24 Vdc electrical system
through the control and distribution panel in the pilothouse.
END OF WORK PACKAGE
0012 00-3/4 blank
0012 00-3
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