a two input two-output open feedwater heater
(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))))