depending on suction or crankcase pressure. Figure 5-3The high-pressure oil from the pump entersshows the compressor at rest. The two cylinderschamber A of the capacity control valve. It then passesequipped with the unloader element are unloaded andthrough an orifice in the top of the piston to chamber B,will remain unloaded until the compressor is started andforcing the piston to the end of its stroke against springthe oil pressure reaches normal operating pressure.A. When the piston of the valve is forced against springFigure 5-3.—Capacity control system.5-3
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