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
5. Recirculate the caustic detergent cleaning solution through the MF modules 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. 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.
6. Drain #2: Drain the caustic cleaning solution from the RO feed tank and MF modules as follows
(see Figure 12 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 cleaning waste storage 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.
0024 00-17
