Will it be plumbed below water level? If so you only need to start a siphon as you usually would and the pump will prime and return water back to the tank.
If it is plumbed with rigid line you can do this; if the tube goes up and over the top, you can put an airline tube up the intake side and suck the airpocket out of the top of the elbow.
This trick will ONLY work if both ends of the pipe is submerged.
if this didnt help, just try locating more info in the DIY section