TM 55-1930-209-14&P-19 Table 4-2.  Preventive Maintenance Checks and Services for ROWPU System (Continued) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY 12) Flush chlorination unit with seawater before returning to normal operation as follows: (a) Turn valve CU3 to position B, WATER, to allow seawater to flush out acid. (b) Turn valve CU5 to position A, DRAIN, to allow flushing seawa- ter to drain to sump tank. (c) Turn function switch to FLUSH. (d) Flush to remove acid for 5 min- utes.  Turn function switch on control cabinet to OFF/RESET. (e) Return system to normal opera- tion. 8 Brine Feed Pump Check that oil level in chlorination unit brine feed pump is above indicated mark in air bleeder filler reservoir.  Add oil if necessary. 9 Metering Pump Check sight on metering pump to ensure oil level is at mark.  Add oil as necessary. 10 Metering Pump Monitor metering pump control unit to Control Unit assure chlorine status on LED display. 11 Chlorination Unit a.  Monitor ammeter to assure reading is Control Cabinet between 950-1000A (0.95-1.OkA). b.  Monitor voltmeter to assure reading is between 6.0-6.5 Vdc. 12 Equipment a.  Monitor CHLORINE STATUS display Monitoring page for chlorine content and pump System position. b.  Monitor SYSTEM STATUS display page to assure: 1) CHLORINE OPERATING OFF is normal. 4-11