TM 55-1930-209-14&P-3
b.
Gradually reduce HP pump diesel engine throttle setting to idle (Figure 3-2). Leave engine idling.
c.
Open throttling valve RO7.
d.
Stop coagulant pump and Inhibitor pump at control station by setting ON/OFF switches (Figure 3-1) to OFF.
e.
After HP pump diesel engine has been running at Idle for about 5 minutes, stop engine by pushing in on
shutdown lever (Figure 3-2).
f.
Stop seawater pump by turning pump OFF/ON/START switch on control station (Figure 3-1) to OFF.
4-7.4.2 RO block membrane cleaning procedures.
a.
Install full drum of membrane cleaning agent (Hydrakleen-20) according to paragraph 4-7 4.3
b.
Perform step (1) below to clean ROWPU 1 Perform step (2) below to clean ROWPU 2.
(1)
For ROWPU 1 cleaning using seawater pump 1, position seawater (SW) valves as indicated:.
o = open
x = closed.
SW valve no.
1
5
7
9
11
13
16
19
20
22
24
29
Valve position
o
x
x
o
o
x
o
x
o
x
x
x
(2)
For ROWPU 2 cleaning using seawater pump 2, position SW valves as indicated ;
o = open
x = closed.
SW valve no
2
6
8
10
12
13
17
18
19
21
23
25.
Valve position
o
x
x
o
o
x
o
x
x
o
x
x
c.
Position RO valves as Indicated.
o = open
x = closed.
A = position A
C = position C.
RO valve no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Valve position
C
C
C
A
x
x
o
x
x
o
x x x
x x o x o o o
d.
Open vent on top of RO block to allow air to escape.
e .
Start seawater pump 1 for ROWPU 1 or pump 2 for ROWPU 2 by setting OFF/ON/START switch on control
station (Figure 3-1) to ON.
f.
Close RO block vent after a steady stream of water flows from vent (Figures NO TAG and NO TAG).
g.
Close seawater valve SW9 for ROWPU 1 or SW10 for ROWPU 2 to allow water/Hydraldeen solution to
recirculate.
h.
Open valves RO13 and RO14 to allow Hydrakleen to drain out and return to drum.
i.
After water circulates for 15 minutes, stop seawater pump.
j.
Close valves RO13 and RO14.
k.
Disconnect used drum of Hydrakleen-20, and attach a new drum according to paragraph 4-7.4 3
l.
Open valves RO13 and RO14 m Start seawater pump.
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