ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0015 00
OPERATOR INSTRUCTIONS
START-UP AFTER A SHORT TERM OR STANDBY SHUTDOWN
WITHOUT DRAINING OPERATION UNDER USUAL CONDITIONS
RO SYSTEM START-UP
1. Check to make sure that Main Pressure Control Valve HVC-401 is fully open (see Figure 2 for
valve location).
2. Toggle the ALARM switch to RESET to clear the RO Feed Tank Level Low Alarm.
3. Make sure the MF feed pump has stopped (the MF Pump indicator light should go off) and that
High Pressure Pump Valve V-212 is open, then start the RO feed pump.
4. Wait until a steady RO Reject Flow rate greater than 10 gpm is indicated on the OCP readout and
the RO Feed pressure is steady. If, while waiting, the RO Feed Tank level drops below 85%,
start the MF Feed Pump.
NOTE
HP Pump P-5 starts first followed by Pump P-6 after a 10 second time delay. It is normal
for a high product TDS alarm to sound after the high pressure pumps are started.
5. START the MF Feed Pump if not already on.
6. Immediately START the High Pressure Pumps.
CAUTION
The MF will not begin the automatic timing of the backwash interval until the first
backwash is manually initiated. Failure to do this will lead to rapid fouling of the MF
membrane, which will require chemical cleaning to restore.
7. Make sure the MF feed tank is at least full, then push the MF Backwash Start button to
manually initiate the first backwash cycle. (The Backwash Start button green light will stay lit until
the PLC detects that the air compressor is off and the RO tank level is at 100 to 105%. Then the
PLC will start the backwash and establish the normal automatic backwash timing. The green light
will flash on and off during the backwash then stay off when the backwash cycle is done.)
NOTE
Several HCV-401 valve adjustments will be required to obtain the correct product flow.
Allow up to several minutes between valve adjustments for flow and pressure to stabilize.
Normal product flow is 20.5 to 21 gpm on seawater and 25.5 to 26 gpm on freshwater and
brackish water up to 20,000 mg/l TDS surface water or 2500 mg/l TDS ground water.
8. Set the Pressure Control valves.
a. For seawater: fully close Auxiliary Pressure Control Valve V-401A, then slowly CLOSE
Main RO Pressure Control Valve HCV-401 until the normal product flow rate is obtained,
or the RO feed pressure reaches 1200 psig, or the valve is closed.
b. For fresh or brackish waters, set Auxiliary Pressure Control Valve V-401A to 50% closed,
then slowly CLOSE Main RO Pressure Control Valve HCV-401 until the normal product
flow rate is obtained. If HCV-401 is fully closed and the normal product flow is not
obtained, open HCV-401, fully close HCV-401A and then adjust HCV-401.
9. Reset the high TDS alarm if on. If the alarm won't reset, refer to RESPONDING TO NORMAL
OPERATION ALARMS in WP 0016.
10. Check the TQG voltage and adjust to 416 volts if needed (TQG TM 5-6115-545-12).
0015 00-10
