This series valve is available as a pressure differential pilot actuated valve as
well as an Actuator driven valve
In the NORMAL POSITION, discharge is routed to the main condenser and the auxiliary is pumped out. No solenoid valve is needed. In the ENERGIZED POSITION, discharge is routed to the auxiliary condenser and the return routed to the main condenser. No check valve is needed. The pump out is closed. This diagram is a typical heat reclaim configuration.