TM 55-1930-209-14&P-3
d.
Check appearance of feedwater in seawater pump flow rate indicator F1 (Figure 3-1).
(1)
If feedwater is not too dirty (cloudy), go to step e.
(2)
If water is very dirty, stop pumps. Make sure seawater strainer is clean and seawater filter has been
drained.
(3)
Repeat steps c and d.
e.
Start coagulant pump by turning coagulant pump ON/OFF switch (Figure 3-1) to ON.
(1) Set pump stroke to 50 and speed control to 35 on coagulant pump control panel (Figure 3-5).
(2) Make sure amber indicator light comes on (Figure 3-5). If amber indicator lamp on coagulant pump
panel does not light, troubleshoot according to Table 4-1.
(3)
Make sure red indicator light does not come on. If red indicator light comes on, replace coagulant drum
(paragraph 4-7.1.3).
f.
Start inhibitor pump by turning inhibitor pump ON/OFF switch (Figure 3-1) to ON.
(1)
Set pump stroke control to 100 and speed control to 46 (Figure 3-5).
(2)
Make sure amber indicator light comes on (Figure 3-5). If amber indicator lamp on control panel does
not light, troubleshoot according to paragraph 4-4.
(3) Make sure red indicator light does not come on. If red indicator light comes on, replace inhibitor drum
(paragraph 4-7.1.3).
NOTE
As media filters fill up, vent valves on top of each filter may spew air and water
until filters are filled with water. Valves automatically close when filters are full.
These valves may open at any time during operation if air accumulates in media
filters.
g.
Ensure vent valves close when media filters are full of water.
h.
Check MEDIA FILTER OK indicator light (Figure 3-1).
(1)
If light is on, go to step i.
(2)
If light is out, check pressure readings on seawater pump discharge pressure gauge P1 and media filters
outlet pressure gauge P2.
(3)
If pressure difference exceeds 35 psi, backwash and flush media filters (paragraph 4-7.2).
(4)
If difference is less than 35 psi, check bulb. Replace if burned out.
i.
Check CARTRIDGE FILTER OK indicator light (Figure 3-1).
(1)
If light is on, go to step j.
(2)
If light is out, check pressure difference between media filters outlet pressure gauge P2 and cartridge
filter assembly outlet pressure gauge P3.
(3)
If pressure difference exceeds 12 psi, change cartridge cage assembly (paragraph 4-7.1.1).
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