Observe vent vessel hose for up to 10 minutes to check clarity of
Perform bull's eye test and readjust polymer as necessary.
- Set sodium hexametaphosphate to run.
Slowly close vent vessel.
- Adjust regulate product flow valve. Ensure product water flow gauge
6 to 12 GPM for salt water or up to 16 for fresh or brackish water, and RO
pressure gauge does not exceed 960 psi for salt water or 500 psi for fresh
Ensure brine flow gauge is between 16 to 24 GPM, and RO vessels
gauge does not exceed 100 psid.
Set chlorine to run and close vent product water.
- Wait five minutes and check product water pH, chlorine residual, and
TDS for standards.
Adjust as needed.
The chlorine residual will not be
accurate until after 30 minutes of contact time.
PART D - OPERATION OF THE 600-GPH ROWPU
Ensure soldiers accurately complete DA Form 1713-R every hour of operation.
You should check the recordings every two hours. Ensure soldiers accurately
complete DA Form 1714-R each time water is issued from the water point.
Check that the soldiers remove the brine hose from the brine tank when tank
is full and place it at least 25 feet downstream from raw water intake.
Shut down the ROWPU when the product tanks are full.
The soldiers will
monitor operation and troubleshoot as needed.
You must ensure the soldiers complete during-operation PMCS. Check that the
soldiers maintain 5 ppm chlorine residual at the point of production.
Remind consumers that when unit water supplies have been procured from a
potable distribution point, the potable water chlorine residual at the point
of consumption (such as water trailers, collapsible fabric drums, water
cans, and lyster bags) will be at least 1 ppm, or higher, if prescribed by
the command surgeon.
PART E - SHUTDOWN OF THE 600-GPH ROWPU
Check that the soldiers perform the correct procedures for shutdown.
three procedures for shutdown are normal shutdown for less than 24 hours,
normal shutdown for more than 24 hours, and extended shutdown for 72 hours