Ok, I'm guessing that the Red and Green power the internal motor through built in limit switches, in which case it shouldn't matter if you leave power applied to Red or Green indefinately. You could prove that by watching the current on your power supply while using the supplied center-off toggle switch. Command it to open and watch the current while holding the switch. I'm guessing that the current drops as soon as the flapper reaches the commanded position, even if you do not release the switch?