a three-input one-output open feedwater heater
(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))))