TM 10-4610-310-14
OPERATOR MAINTENANCE
LIGHTWEIGHT WATER PURIFIER
ULTRAFILTRATION MEMBRANE
MAINTENANACE CLEANING
INITIAL SETUP
Materials/Parts
Special Environmental Conditions
Sodium Hypochlorite (item 18, WP 0136 00)
Follow local regulations for discharge
Tools
Stop watch (item 49, WP 0135 00)
Chlorine Test Strips (481126-50)
GENERAL
This work package contains information and instructions to maintain the three ultrafiltration cartridges in the
Ultrafiltration (UF) module used in the Lightweight Water Purifier (LWP). If the Trans-membrane Pressure (TMP)
increases faster than 4 psi in 24-hours, it will be necessary to perform this instruction every 24 hours.
PROCEDURE
CAUTION
All hose connections must be clean. Dirt or debris may be ingested into the piping system. Failure to follow this
precaution may render the solenoid valves on the UF module inoperable. Failure to follow this precaution may
result in damage to equipment.
1. Make sure the cleaning tank T4 on the chemical injection/cleaning module is clean and free of any debris. If
dirty, clean the cleaning tank with product water.
2. Fill the cleaning tank with product water through 6-foot gray hose on chemical injection/cleaning module.
Fill to the bottom of the cleaning return fitting located on the side of the cleaning tank. Open diverter ball
valve V13. Chlorinated product water is acceptable with this procedure.
3. Shut down the LWP. See WP 0013 00.
4. Ensure cleaning tank drain valve is closed and remove plug from Y-strainer. Remove mesh screen. See
Figure 1.
CLEANING TANK T4
CLEANING TANK
OUTLET
Y-STRAINER
CLEANING
TANK
DRAIN
VALVE
MODULE
SHOWN ON SIDE
Figure 1. Y-Strainer Location.
