When raising steam on a boiler, the superheater drains should __________.
Remain open or partially open until steam blows through the lines, and then the valves should be closed
Be opened to remove condensate, and then closed when the first burner is lit
Be closed until just before line pressure is reached, and then given a short blow period
Be closed until after the air cock is closed, and then opened until the boiler is placed on line
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