A) The F.O. Inlet and outlet valves should be kept shut, but steam heating valves should be kept crack open so as to keep the heater warm. B) F.O. Inlet and outlet valves should be kept shut and heating valves also should be completely shut and should be drained of any remaining F.O. c) F.O. Inlet and outlet valves should be kept crack open so that the F.O. recirculation can take place. d) F.O. inlet and outlet valve should be kept shut while outlet valve should be left open so that « Previous Next »
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