TM 55-1930-209-14&P-4Table 3-2. System ValvesFigures1-2 & 1-3Label IdentificationTypeCalloutLocationandValveFunction2-wayCU1*In chlorination unit manifold drainCHLORINATION PRESSURE RELIEFline(PRESET): Allows relief drainage frommanifold to sump in case of pressurebuild-up in chlorination unit cells2-wayCU2*In recirculating (circulating) pumpCHLORINATION SYSTEM HOLDING TANKsuction line from holding tankOUTPUT TO RECIRCULATING PUMP:(recycle tank)Allows flow from holding tank torecirculating pump during normal operation3-wayCU3*In acid tank outlet lineCHLORINATION DESCALING OPERATIONFLOW CONTROL: In WATER position,allows flush water to flow to recirculatingpump to flush out both residual hypochlorite(before flushing with acid), and acid (duringscale flushing operation). In ACID position,allows acid to flow from acid tank torecirculating pump during scale flushingoperation. Closed (OFF) during normaloperation3-wayCU4*In recirculating pump dischargeCHLORINATION RECIRCULATING PUMPlineOUTPUT CONTROL: Allows recirculatingpump discharge to flow to heat exchangersand cells during normal operation and, when50% open, during scale flushing operation3-wayCU5*In acid tank inlet lineCHLORINATION DESCALING OPERATIONFLOW CONTROL: In ACID position, allowsacid to flow back to acid tank during scaleremoval operation. In DRAIN position,allows flush water to drain overboard duringscale flushing operation. Closed (OFF)during normal operation2-wayCU6*In holding tank cell input lineCHLORINATION SYSTEM HOLDING TANKCELL OUTPUT: Allows cell output to flow toholding tank during normal operation2-wayCU6AIn holding tank cell output lineCHLORINATION HOLDING TANK INPUT:Allows cell output to flow from valve CU6 toholding tank3-wayCU*In brine tank outlet lineCHLORINATION BRINE FLOW CONTROL:Allows brine to flow from brine tank to brinepump and allows draining in brine tank3-3
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