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
3. Recirculate the RO acid cleaning solution from the RO feed tank, through the RO feed pump,
through the RO elements, and back to the RO feed tank as follows:
a. Set the SYSTEM MODE SWITCH to RO CLEAN.
b. Start the RO feed pump.
c. Set the Tank Heater switch to AUTO 2.
d. The RO reject flow indicates whether or not cleaning solution is recirculating.
e. Continue recirculation for one hour.
4. Force-air drain the RO elements as follows:
a. Stop the RO feed pump.
b. Turn the Tank Heater switch to OFF.
c. Close RO Clean Feed Valve V-701.
d. Close Product Utility Valve V-511
e. Make sure RO Air Purge Valve V-913 is closed (see Figure 9 for valve location).
f. Connect one end of the auxiliary air hose (from BII) to the quick-disconnect fitting in Air
System Section 1 above the compressor opposite Pressure Gauge PI-902.
g. Connect the other end of the auxiliary air hose to the quick-disconnect fitting at RO Air
Purge Valve V-913 in the feed inlet to RO vessel #1.
h. Slowly and only partially open RO Purge Valve V-913. This will force most of the
cleaning solution out of the RO, back through Clean Return Valve V-702, and into the RO
feed tank so that it can be used to clean the MF.
i. Close Valve V-913 when air is observed to be discharging into the RO feed tank.
j. Disconnect the auxiliary air hose first at Valve V-913 then at Air System Section 1.
Return the auxiliary air hose to the BII.
RO PURGE VALVE V-913
AUXILIARY AIR HOSE
AIR SYSTEM SECTION 1
Figure 9. Auxliary Air Hose Connections for Force-Air Draining the RO Elements.
5. End the RO acid cleaning as follows:
a. Set the SYSTEM MODE SWITCH to STANDBY.
b. Place the hose from RO Vessel Drain Valve V-408 into a bucket. Open the valve. Drain
the remaining solution into the bucket. Close the valve when draining is completed.
c. Place the hose from HP Pump Outlet Drain Valve V-302 into a bucket. Open the valve.
Drain the remaining solution into the bucket. Close the valve when draining is completed.
d. Place the hose from RO Feed Piping Drain Valve V-304 into a bucket. Open V-304 and
V-701. Drain the remaining solution into the bucket. Close both valves when draining is
completed.
e. Empty the bucket(s) into the RO feed tank.
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