TM 55-1930-209-14&P-19
Table 3-3. Preventive Maintenance Checks and Services for ROWPU System (Continued)
B -
Before
D -
Daily
Q - Quarterly
D -
During
W -
Weekly
S - Semiannually
A -
After
M -
Monthly
A - Annually
INTERVAL
ITEM
PROCEDURES
EQUIPMENT
ITEM
TO BE
CHECK FOR AND HAVE
IS NOT READY/
NO.
INSPECTED
REPAIRED OR ADJUSTED
AVAILABLE IF
B D A D W M Q S A
AS NECESSARY
2) Follow procedures above.
g. Flush each media filter simultaneously:
1) Position RO valves as indicated
below:
O = Open
X = Closed 1/20 = 1/2 open
A = Position A
B = Position B
C = Position C
RO Valve No.
Valve Position
1
A
2
A
3
A
4
C
5
O
6
O
7
X
12
O
18
O
19
X
2) Start seawater pump by turning pump
ON/OFF/START switch on control
station to START and then to ON.
3) After 10 minutes of flushing, stop sea-
water pump by turning pump ON/
OFF/START switch to OFF.
5
*
*
RO Block
Pressure
Pressure Tube
between
Membrane
P4 and P5
exceeds 25 psi.
NOTE
Clean RO block tube membranes when
the pressure difference between HP
pump discharge pressure gauge P4 and
brine discharge pressure gauge P5
exceeds 25 psi. Procedures are for nor-
mal cleaning operations using seawater
pump 1 for cleaning ROWPU 1 RO Block
and seawater pump 2 for cleaning
ROWPU 2 RO Block.
3-15
