TM 55-1925-284-14&P
0014 00
11. Allow the air to scour the bottom of the media tank (figure 4, item 9) for at least 30 minutes.
12. Press the STOP button (figure 3, item 1) on the MSD motor controller (figure 3, item 2).
13. Verify that the blower (figure 4, item 1) has stopped.
14. CLOSE valve MSD-6 BLOWER DISCH TO AIR SCOURING SOV (figure 4, item 7).
NOTE
Ensure that the sewage holding tank has adequate capacity to hold the effluent from the
media tank before proceeding with this procedure.
15. OPEN valve MSD-9 MEDIA TANK DRAIN (figure 4, item 4) and drain the contents of the media tank
(figure 4, item 9) to the sewage holding tank (figure 4, item 10).
16. Allow the media tank (figure 4, item 9) to drain for a minimum of 30 minutes.
17. CLOSE valve MSD-9 MEDIA TANK DRAIN (figure 4, item 4).
NOTE
Do not allow sewage to enter the media tank before it has been filled with water.
19. OPEN valve SD-1 SEWAGE INLET TO MSD (figure 4, item 2).
20. Return all valves to their normal operating position (WP 0005 00).
21. Perform the startup procedure for operation under usual conditions (WP 0005 00).
22. Notify the vessel that the MSD is operational and the water closets can be used.
CLEAN MEDIA TANK
DISASSEMBLY
1. Perform the Air Scour and Pump Out Media Tank procedure in this work package through step 19.
NOTE
Ensure that the sewage holding tank has adequate capacity to hold the effluent from the
media tank before proceeding with this procedure. If the sewage tank is full, discharge
the effluent to a proper shore based facility prior to continuing with this procedure.
2. OPEN valve MSD-9 MEDIA TANK DRAIN (figure 4, item 4) and empty the clean water from the media tank
(figure 4, item 9) into the sewage holding tank (figure 4, item 10).
3. Loosen the potable water pipe coupling (figure 5, item 1) and remove the potable water fill piping
(figure 5, item 2) from the media tank inspection cover (figure 5, item 4).
4. Verify that valve MSD-5 BLOWER DISCHARGE SHUTOFF (figure 4, item 8) is CLOSED and that the blower
(figure 4, item 1) is not operating.
5. CLOSE, lock out, and tag out (FM 55-502) CA-81 LP AIR SHUTOFF (figure 5, item 3).
0014 00-7