2-18. ROUTINE SHUTDOWN TO STAND-BY. Use this procedure when the ROWPU is to be shut down for 3 hours or less
Figure 2-48. Routine Shutdown to Stand-By
Fully open system pressure control valve (1).
Push HIGH PRESSURE PUMP STOP (2).
After the feed flow drops below 60 gpm, push BOOSTER PUMP STOP (3).
Push CHEMICAL PUMP STOP (4).
Push RAW WATER PUMP STOP (5).
Turn COMPRESSOR OFF/ON switch (6) to OFF position.
Close air storage valve V72 (7).
· If ROWPU is kept in stand-by more than 3 hours, the RO elements may lose performance
and require cleaning. Use temporary secured shutdown procedures (para. 2-22) when a
longer shutdown is anticipated.
· When operating in brackish or seawater and ROWPU is kept in stand-by for 3 hours or
more, severe corrosion of piping and equipment will occur if brackish or seawater is not
flushed from system. Perform temporary secured shutdown procedures (para. 2-22)
Allow media filter to drop in pressure to less than 5 psi (34 kpa) before opening main circuit
breaker or shutting down generator.
Turn MAIN CIRCUIT BREAKER (8) to OFF.
Shut down generator.
Change 12 2-87