If you connect the unit so that it will start whenever you turn on the other machine, you may not be able to comply with the three minute rule that states that you have to wait at least 3 minutes before you turn the compressor back on after you have turned it off. Turning the unit on and off frequently will strain the unit greatly and may cause malfunction or break-down. If you necessarily need to connect the unit to another machine, you must consult with an authorized retailer about the specifics before doing so.