TM 55-1930-209-14&P-19 Section II Table 4-2.  Preventive Maintenance Checks and Services for ROWPU System 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 CHLORINATION SYSTEM WARNING Be sure electrical power is OFF before performing any maintenance on electrical systems.  Redtag appropriate switches and circuit breakers with: "WARNING - DO NOT ACTIVATE.  REPAIRS BEING MADE." Observe all safety precautions at the beginning of this manual.  Hazardous chemical materials are used with this equipment.  Always use approved breath- ing devices when working with chemi- cals.  Avoid chemical contact with eyes, skin and clothing.  Always wear safety glasses, gloves, and rubber aprons when handling chemicals. 1 All Components NOTE When performing BEFORE and AFTER PMCS, make sure all circuit breakers are open (OFF): 1.  Circuit breakers P5 and P8 are open (OFF) to panels 1 and 2. 2.  Power panel circuit breaker 9P5 is open (OFF) to chlorinate unit con- trol panel. 3.  Power panel 1 circuit breaker 10P5 is open (OFF) to metering pump controller motor. 4.  Power panel 2 circuit breaker 8P8 in open (OFF) to vent for 8 con- troller motor. a.  .Wipe all components clean, especially flowmeters, indicators, control panels and electrolytic cells (Void 2 port). b.  Check for leaks paying special attention Class III leaks. to joints, valves, fittings and piping. Report leaks to shift leader or bargemas- ter for corrective action. 4-5