A reheat coil piping arrangement with a 2-way control valve on the return line, accompanied by an autoflow balance and shut-off valve on the hot water return and an autoflow strainer and shut-off valve on the hot water supply is detailed in the top diagram. A reheat coil piping arrangement featuring a 3-way control valve connecting the hot water supply and return lines, complete with an autoflow balance valve and an optional high-point vent on the return branch alongside an autoflow strainer valve on the supply line is featured in the bottom diagram.
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