5 |
DRAIN OPERATIONS |
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A. PUMP FROM FORWARD TORPEDO ROOM BILGES
TO EXPANSION TANK WITH DRAIN PUMP |
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1. Open the forward bilge sump suction
valve in the forward torpedo room.
2. Open the drain line forward stop valve
in the pump room.
3. Open the drain pump suction valve.
4. Open the drain pump discharge valve
to the compensating system. (The compensating water main leads to the top of the expansion tank through valves normally locked
OPEN as shown in Figure 5-1.)
5. Start the drain pump.
6. Observe the drain pump indicator
lamps to determine whether the water in the
drain pump air chambers is at the proper level
(see Sections 3B2 and 3B5).
The water is at the proper level when
only the lower light marked DRAIN PUMP.
LOW is ON.
When both lights are ON, the water level
is too high. Admit additional air into the air
chambers by means of the 225-pound air connection to the drain pump.
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When both lights are OUT, the water
level is too low. Expel some air from the air
chambers by means of the vent valve on the
drain pump.
7. After the forward bilge has been
emptied, open the middle bilge sump suction
valve at the after end of the torpedo room.
8. Shut the forward bilge sump suction
valve in the forward torpedo room.
9. After the middle bilge has been
emptied, open the after bilge sump suction
valve at the after end of the torpedo room.
10. Shut the middle bilge sump suction
valve.
11. Stop the drain pump when the after
bilge has been emptied.
12. Shut the drain pump suction valve.
13. Shut the drain pump discharge valve
to the compensating system.
14. Shut the drain line forward stop valve.
15. Shut the after bilge sump suction valve
at the after end of the torpedo room.
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41
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Figure 5-1. PUMP FROM FORWARD TORPEDO ROOM BILGES
TO EXPANSION TANK WITH DRAIN PUMP
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41
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B. PUMP FROM PUMP ROOM BILGES TO SEA
WITH DRAIN PUMP |
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1. Open the forward bilge sump suction
valve in the pump room.
2. Open the drain pump suction valve.
3. Open the stop check valve and sea
valve on the drain pump overboard discharge
line.
4. Start the drain pump.
5. Observe the drain pump indicator
lamps to determine whether the water in the
drain pump air chambers is at the proper
level (see Sections 3B2 and 3B5).
The water is at the proper level when
only the lower light marked DRAIN PUMP
LOW is ON.
When both lights are ON, the water level
is too high. Admit additional air into the air
chambers by means of the 225-pound air connection to the drain pump.
When both lights are OUT, the water
level is too low. Expel some air from the air
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chambers by means of the vent valve on the
drain pump.
6. When the forward bilge has been
emptied, open the middle bilge sump suction
valve in the pump room.
7. Shut the forward bilge sump suction
valve.
8. When the middle bilge has been
emptied, open the after bilge sump suction
valve in the pump room.
9. Shut the middle bilge sump suction
valve.
10. Stop the drain pump when the after
bilge has been emptied.
11. Shut the drain pump suction valve.
12. Shut the stop check valve and sea
valve on the drain pump overboard discharge
line.
13. Shut the after bilge sump suction valve
in the pump room.
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42
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Figure 5-2. PUMP FROM PUMP ROOM BILGES TO SEA
WITH DRAIN PUMP.
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42
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C. PUMP FROM FORWARD TORPEDO ROOM BILGES
TO SEA WITH DRAIN PUMP |
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1. Open the forward bilge sump suction
valve in the forward torpedo room.
2. Open the drain line forward stop valve
in the pump room.
3. Open the drain pump suction valve.
4. Open the stop check valve and sea
valve on the drain pump overboard discharge
line.
5. Start the drain pump.
6. Observe the drain pump indicator
lamps to determine whether the water in the
drain pump air chambers is at the proper
level (see Sections 3B2 and 3B5).
The water is at the proper level when
only the lower light marked DRAIN PUMP
LOW is ON.
When both lights are ON, the water level
is too high. Admit additional air into the air
chambers by means of the 225-pound air connection to the drain pump.
When both lights are OUT, the water
level is too low. Expel some air from the air
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chambers by means of the vent valve on the
drain pump.
7. After the forward bilge has been
emptied, open the middle bilge sump suction
valve at the after end of the torpedo room.
8. Shut the forward bilge sump suction
valve in the forward torpedo room.
9. After the middle bilge has been
emptied, open the after bilge sump suction
valve at the after end of the torpedo room.
10. Shut the middle bilge sump suction
valve.
11. Stop the drain pump when the after
bilge has been emptied.
12. Shut the drain pump suction valve.
13. Shut the stop check valve and sea
valve on the drain pump overboard discharge
line.
14. Shut the drain line forward stop valve.
15. Shut the after bilge sump suction valve
at the after end of the torpedo room.
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49
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Figure 5-3. PUMP FROM FORWARD TORPEDO ROOM BILGES
TO SEA WITH DRAIN PUMP.
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43
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D. PUMP WATER FROM COLLECTING TANK TO EXPANSION TANK
WITH DRAIN PUMP |
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1. Unlock and open the drain pump suction valve from the collecting tank located
in the after engine room. This valve normally
is locked SHUT.
2. Open the drain suction stop check
valve from the collecting tank.
3. Open the drain line aft stop valve in
the pump room.
4. Open the drain pump suction valve.
5. Open the drain pump discharge valve
to the compensating system. (The compensating water main leads to the top of the expansion tank through valves normally locked
OPEN as shown in Figure 5-4.)
6. Start the drain pump.
7. Observe the drain pump indicator
lamps to determine whether the water in the
drain pump air chambers is at the proper level
(see Sections 3B2 and 3B5).
The water is at the proper level when
only the lower light marked DRAIN PUMP
LOW is ON.
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When both lights are ON, the water level
is too high. Admit additional air into the
air chambers by means of the 225-pound air
connection to the drain pump.
When both lights are OUT, the water
level is too low. Expel some air from the air
chambers by means of the vent valve on the
drain pump.
8. When the water has been transferred,
stop the drain pump. When all water has been
pumped out, the liquidometer gage-will show
the collecting tank filled with fuel.
9. Shut the drain pump suction valve.
10. Shut the drain pump discharge valve
to the compensating system.
11. Shut the drain line aft stop valve in the
pump room.
12. Shut the drain suction stop check
valve from the collecting tank in the after
engine room.
13. Shut and lock the drain pump suction
valve from the collecting tank.
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44
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Figure 5-4. PUMP WATER FROM COLLECTING TANK TO EXPANSION TANK
WITH DRAIN PUMP.
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E. PUMP WATER FROM COLLECTING TANK TO EXPANSION TANK
WITH TRIM PUMP |
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1. Unlock and open the drain pump suction valve from the collecting tank located in
the after engine room. (This valve normally
is locked SHUT.)
2. Open the drain suction stop check
valve from the collecting tank.
3. Open the drain line aft stop valve in
the pump room.
4. Open the drain pump cross connection
valve.
5. Open the trim pump suction valve on
the trim manifold.
6. Open the trim pump discharge valve on
the trim manifold.
7. Open the drain pump discharge valve
to the trim manifold.
8. Open the drain pump discharge valve
to the compensating system. (The compensating water main leads to the top of the expansion tank through valves normally locked
OPEN as shown in Figure 5-5.)
9. Open the priming pump suction stop
valve at the priming float valve.
10. Open the trim manifold priming vent
valve leading to the priming float valve.
11. Start the priming pump. Observe the
priming pump vacuum gage. If the gage
reads below about 20 inches, the trim pump is
not fully primed since this vacuum reading
indicates the float valve is not filled with
water. (The sealing water tank gage must
register at least two-thirds full for effective
operation of the priming pump.)
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12. Stop the priming pump when the gage
reads about 20 inches, indicating high vacuum.
13. Shut the trim manifold priming vent
valve.
14. Shut the priming pump suction stop
valve. (Operations 9 to 14 inclusive may be
omitted if the trim system is filled with water
from previous use.)
15. Turn the trim pump control rheostat to
the slowest speed position. Start and operate
the trim pump. Adjust speed to obtain desired
rate of pumping. (Effective pumping is indicated by air flow which can be felt when holding the hand over the vent on the 225-pound
service air manifold and a discharge reading
of the trim meter which measures flow in
pounds. If there is no flow, repeat priming
operation.)
16. When the water has been transferred,
stop the trim pump.
17. Shut the trim pump suction valve on
the trim manifold.
18. Shut the trim pump discharge valve on
the trim manifold.
19. Shut the drain pump discharge valve
on the trim manifold.
20. Shut the drain pump discharge valve
to the compensating system.
21. Shut the drain pump cross connection
valve.
22. Shut the drain line aft stop valve.
23. Shut the drain suction stop check valve
from the collecting tank.
24. Shut and lock the drain pump suction
valve from the collecting tank.
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45
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Figure 5-5. PUMP WATER FROM COLLECTING TANK TO EXPANSION TANK
WITH TRIM PUMP.
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F. PUMP FROM POPPET VALVE DRAIN TANK TO SEA
WITH DRAIN PUMP |
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1. Open the poppet valve drain tank suction valve on the drain manifold in the forward torpedo room.
2. Open the drain line forward stop valve
in the pump room.
3. Open the drain pump suction valve.
4. Open the stop check valve and sea valve
on the drain pump overboard discharge line.
5. Start the drain pump.
6. Observe the drain pump indicator
lamps to determine whether the water in the
drain pump air chambers is at the proper level
(see Sections 3B2 and 3B5).
The water is at the proper level when
only the lower light marked DRAIN PUMP
LOW is ON.
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When both lights are ON, the water level
is too high. Admit additional air into the air
chambers by means of the 225-pound air connection to the drain pump.
When both lights are OUT, the water
level is too low. Expel some air from the air
chambers by means of the vent valve on the
drain pump.
7. Stop the drain pump when the poppet
valve tank has been emptied.
8. Shut the drain pump suction valve.
9. Shut the stop check valve and sea valve
on the drain pump overboard discharge line.
10. Shut the drain line forward stop valve
in the pump room.
11. Shut the poppet valve drain tank suction valve.
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46
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Figure 5-6. PUMP FROM POPPET VALVE DRAIN TANK TO SEA
WITH DRAIN PUMP.
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