This series valve is available as a pressure differential pilot actuated valve as
well as an Actuator driven valve
These valves may be used in the system to direct flow. In the NORMAL POSITION the discharge gas is routed through the main condenser. In the ENERGIZED POSITION the discharged gas is routed through the auxiliary condenser and the return routed to the main condenser. No check valve is needed. This diagram is a typical heat reclaim configuration.