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
NOTE
The CLEAN light flashes during the cleaning cycle and turns off when the cycle is
completed (approximately 26 minutes). The RO pump stops. If the heaters were
on, they also turn off at the completion of the cleaning cycle.
Extended cleaning is required if the operator has chosen to wait 40 hours after the
first transmembrane pressure (TMP) alarm, the maximum TMP has been exceeded,
the water temperature does not reach at least 100 F during the cleaning cycle, or
the TMP is higher than the normal reading after cleaning (3 to 5 psi at 50 to 60 gpm
MF Feed Flow).
d. If extended cleaning is required, perform the following steps:
1) Set the MF CLEAN switch to SOAK. This interrupts the clean cycle and leaves
the cleaning solution in the MF modules to soak.
2) Soak for 15 minutes.
3) Set the MF Clean switch back to FILL/RECIRC for one minute.
4) Repeat the SOAK / FILL/RECIRC sequence for a total of one hour.
e. Set the MF Clean switch back to FILL/RECIRC to continue with the normal cycle and
timing to completion.
f. 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.
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.
CAUTION
Failure to add sodium bisulfite to the chlorinated product water that is used for
cleaning will result in MF membrane failure.
g. Add two caps of bisulfite from the bisulfite bottle to the MF feed tank while refilling.
4. Drain #2: Drain the acid cleaning solution from the RO feed tank and MF modules as follows:
a. Set the Tank Heater Switch to OFF.
b. Close Clean Return Valve V-702 (see Figure 7 for valve location).
c. If the cleaning waste tank is used, 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 the cleaning waste tank is not used, 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.
0021 00-10
