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 TM 55-1925-273-10-2
OPERATOR'S MANUAL
INLAND AND COASTAL LARGE TUG (LT)
OPERATION UNDER UNUSUAL CONDITIONS
FIRE DAMPER OPERATION
INITIAL SETUP:
References:
Personnel Required:
TM 55-1925-273-SDC
One Crewmember, Any MOS
VENTILATION DAMPER OPERATION
Dampers are located in the ventilation ductwork throughout the vessel. They serve to balance the amount of air provided to
various compartments. In the event of a fire, the dampers are CLOSED to prevent "fanning" the fire. The following proce-
dure provides instructions for closing and opening dampers.
SYSTEM OPERATION
CLOSE DAMPER
1.
Remove the locking pin (figure 1, item 1).
2.
Move the damper lever (figure 1, item 2) in the SHUT direction as indicated on the lever guide (figure 1, item 3).
3.
Install the locking pin (figure 1, item 1).
OPEN DAMPER
1.
Remove the locking pin (figure 1, item 1).
2.
Move the damper lever (figure 1, item 2) in the OPEN direction indicated on lever guide (figure 1, item 3).
3.
Install the locking pin (figure 1, item 1).
2
3
SHUT
OPEN
1
Figure 1. Fire Damper Operation
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