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 TM 55-1925-273-10-1
0080 00
! CAUTION
Media tank inlet pressure must not exceed 45 PSI (3.1 bar) and differential pressure must not
exceed 35 PSI (2.4 bar), or damage could occur to the media filter tank.
4.
Align the media filter maintenance mode valves (figure 21, item 6) to the "BACKWASH" position as shown in figure 24.
5.
Slowly OPEN RO-V-2 (figure 21, item 2), media filter supply, to backwash the media filter.
6.
Verify that the media filter INLET PRESSURE gauge (figure 21, item 7) does not exceed 45 PSI (3.1 bar).
7.
Verify that the pressure differential between the media filter INLET PRESSURE gauge (figure 21, item 7) and the
media filter OUTLET PRESSURE gauge (figure 21, item 8) does not exceed 20 PSI (2.4 bar).
8.
BACKWASH the media filter for a minimum of 10 minutes, or until differential pressure between the media filter
INLET PRESSURE gauge (figure 21, item 7) and the media filter OUTLET PRESSURE gauge (figure 21, item 8) is
less than 5 PSI (0.3 bar).
9.
CLOSE RO-V-2 (figure 21, item 2), media filter supply.
MEDIA FILTER MODES & VALVE POSITIONS
OPERATIONAL MODES
(BOOSTER PUMP AND HIGH PRESSURE PUMP RUNNING)
NORMAL
BYPASS
MAINTENANCE MODES
(BOOSTER PUMP ONLY)
BACKWASH
RINSE
Figure 24. Media Filter Maintenance Mode Valve Positions
0080 00-20
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