The Open/Close module is for running a reversable motor a specific amount of time before turning off power. After an unspecified period of time, the motor is reversed for the specific time. For example, lowering a movie screen (it takes x seconds), watching the movie and then rolling the screen up (for the same x seconds). That would eliminate having to "hold" the up or down buttons to accomplish that task. But, that's not what you want.
What yopu do want is an On/Off module, 2443-222 which, BTW, is rated for 15A.