ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0024 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR INSTRUCTIONS
MICRO-FILTRATION SYSTEM CLEANING WITH REVERSE OSMOSIS
SYSTEM ACID CLEANING OPERATION UNDER USUAL CONDITIONS
2. Recirculate the acid cleaning solution through the MF as follows:
a. Set the MF Clean Switch to FILL/RECIRC. The RO pump starts to automatically fill the
MF modules and establish recirculation through the MF modules.
b. Turn the Tank Heater Switch to AUTO 2. The heaters heat the cleaning solution and
automatically cut off when the temperature reaches 110 degrees F.
c. Check that there is an indication of MF Flow at the OCP display. If not, make sure that
the valves are properly positioned.
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 using the
distribution system auxiliary hose. 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.
3. 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 10 for valve location).
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).
0024 00-12
