ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0021 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR INSTRUCTIONS
MICRO-FILTRATION SYSTEM CLEANING OPERATION UNDER
USUAL CONDITIONS
e. Repeat the SOAK / FILL/RECIRC sequence for a total of up to one hour.
f. Set the MF Clean switch back to FILL/RECIRC to continue with the normal cycle and
timing to completion.
g. While cleaning the MF modules, refill the MF feed tank with product water from the
distribution system. This water will be used to rinse the MF system.
6. Drain #2: Drain the caustic cleaning solution from the RO feed tank and MF modules as follows
(see Figure 9 for valve location):
a. Set the Tank Heater switch to OFF.
b. Close Clean Return Valve V-702.
c. If using the cleaning waste storage tank, open valves V-705 and V-706 on Adaptors A-12
and A-16 that are connected together on the cleaning waste tank (see Figure 5 for valve
location).
d. Make sure the A-16 adaptor valve V-706 on the other side of the waste tank is closed.
e. If not using the waste tank, open valve V-705 on Adaptor A-12 at the end of the cleaning
waste hoses (see Figure 6).
f. Set the MF Clean switch to DRAIN #2. The RO feed pump starts and flushes the
cleaning solution from the tank through the MF and out the waste hose.
NOTE
When the tank level reaches the Low Level Switch, the alarm sounds and the RO
feed pump stops. Occasionally the RO pump will lose prime before reaching the
low level. In this case, if the RO pump does not stop within 15 seconds from when
the tank level reads zero, stop the RO pump.
CAUTION
Failure to close MF Clean Feed Valve V-704 will result in water flow back into the
RO feed tank rather than out as required.
e. After the RO feed pump is stopped, close MF Clean Feed Valve V-704.
7. Drain #3: Set the Clean switch to Drain #3 to purge the remaining caustic detergent cleaning
solution from the MF modules with air as follows:
a. A normal air purge drain down cycle automatically sequences.
b. Cleaning solution drains out through the cleaning waste hoses.
c. During the drain #3 cycle, slightly open MF Clean Feed Valve V-704 for just a moment to
push cleaning solution out of the cleaning bypass piping.
d. The Clean light flashes during operation and turns off when complete.
8. Rinse the MF system with product water as follows:
WARNING
Chemical dust. Wear a protective face shield, chemical gloves, and a dust mask
when handling sodium bisulfite. Avoid inhaling chemical dust or fumes. Failure to
observe this warning may result in mild irritation of the nose, throat, eyes, and
skin.
0021 00-15
