In addition to the following procedures, seawater pumps can be started and
stopped at local control switches in void 2 starboard.
Make sure switchboard circuit breakers P6 and P7 are closed (ON).
Before starting seawater pumps, start ROWPU compressed air system according to procedures in Chapter 12.
To supply seawater to both ROWPU's, start seawater pumps I and 2 by turning seawater pump OFF/ON/START
switch to ON at ROWPU 1 and ROWPU 2 control stations. To supply seawater to only one ROWPU, turn
appropriate switch to ON.
While operating, perform during operation checks in steps i thru m.
Check for leaks, paying special attention to all joints, valves, fittings, and piping. Report leaks to shift leader so
corrective action can be taken.
Check for loose or missing securements and fasteners. Tighten or replace as necessary.
k Use insulated tools to check wiring for loose connections. De-energize and tighten as necessary.
Be alert to unusual noises, smells, or overheating that might indicate a pending malfunction.
While supplying seawater to ROWPU's and chlorination unit or for ballasting using seawater pumps 1 and 2,
perform the following:
Check for normal operation and for leaks.
Watch seawater strainer input and output pressure gauges:
A pressure of 2-4 Hg is normal.
If pressure difference reaches 8 Hg, turn handle on strainer to move seawater through clean basket.
Remove and dean dirty basket (see seawater strainer placard).
If operating in clean water, drain seawater filters 15 seconds for every 8 hours of
operation. If operating In dirty water, drain seawater filters 15 seconds for each
hour of operation.
Drain seawater filters as follows:
To drain seawater filter
Open SW valves no.:
22 and 26
23 and 26
1 and 2
22, 23, and 26
Close valves SW22, SW23, and/or SW26 after draining.