When air pressure regulator gauge reading stabilizes at 3-5 psi, open valve SW44 to vent seachest.
Close generator cooling seachest blowdown valve.
Do not open seachest valve SW37 unless valve SW44 is open.
To return seachest to normal operation, open valves SW37 and SW49. Start at least one of the
generators and check sea strainer inlet gauges.
If sea strainer inlet gauges do not indicate near normal reading, repeat steps a thru g above.
Seawater system shutdown procedures
This shutdown procedure shuts off seawater to the chlorination and air
conditioning units. If these units are obtaining seawater from the seawater pumps,
an alternative supply of seawater must be provided by following procedures in
Shutdown seawater system as follows:
If ballasting, proceed according to paragraphs 3-3.5 and 3-3.6.
If supplying seawater to ROWPU's using seawater pump(s) 1 and/or 2, proceed according to
If supplying seawater to generator cooling, proceed according to paragraph 3-4.2.
If supplying seawater to air conditioning and chlorination units using cooling pump, proceed
according to paragraph 3-4.3.
Perform after operation checks.
Shutdown seawater supply to ROWPU's
Stop seawater pump(s) by turning OFF/ON/START switch to OFF on ROWPU 1 and/or ROWPU 2 control
Close valves SW1 and SW2 in void 2 starboard.
Shutdown generator cooling seawater supply
Make sure all generator engines are stopped.
Close valve SW37.
Shutdown seawater supply to air conditioning and/or chlorination units when using cooling pump.
Push STOP button on cooling pump motor controller.
Push main switch to OFF.
Close valve SW3.