If you are running it from the Alde screen, the 110V power is turned on one line, the propane is turned on at another line on the display. In addition, you can set the 110V to high or low power.
The recirculating pump (under the dinette seat has speed settings. If it's set to slow, it will take a while to get going.
The Alde fluid tank is behind a panel in the cabinet above the toilet. It needs to be full up to the line when things are running.
There are multiple air bleed points around the trailer. Each one needs to be opened long enough to eliminate air from the system.
None of this (other that turning things on from the panel) should be required in normal use. The first time the system is fully run, you probably will get air out and need to put some fluid in.