(Forall (?Self ?Time)
(<=> (Active ?Time Open-Feedwater-Heater ?Self)
(And (Open-Feedwater-Heater ?Self)
(Active ?Time Heat-Exchanger ?Self))))
(Forall (?Self ?Time)
(<=> (Active ?Time 2-1-Open-Feedwater-Heater ?Self)
(And (2-1-Open-Feedwater-Heater ?Self)
(Active ?Time 2-1-Port-Thermal-Component ?Self)
(Active ?Time Open-Feedwater-Heater ?Self))))
(Forall (?Self ?Time)
(<=> (Active ?Time 2-2-Open-Feedwater-Heater ?Self)
(And (2-2-Open-Feedwater-Heater ?Self)
(Active ?Time 2-2-Port-Thermal-Component ?Self)
(Active ?Time Open-Feedwater-Heater ?Self))))
(Forall (?Self ?Time)
(<=> (Active ?Time 3-1-Open-Feedwater-Heater ?Self)
(And (3-1-Open-Feedwater-Heater ?Self)
(Active ?Time 3-1-Port-Thermal-Component ?Self)
(Active ?Time Open-Feedwater-Heater ?Self))))