Open all valves and jets, remove one of the filters and fill the tub through the filter intake to lessen the chance of air lock. Fill to fill line, reinstall the filter, and throw the breaker on. The pumps will go into priming mode automatically after the system runs through a short self check (as described in the manual). Make sure that water is flowing through the jets, don't run them dry for a long period of time if you don't see water being moved. If it appears you have an air lock (pumps are running but no water coming from the jets) you may need to stop and start the pumps several times to clear it - it took my new R8 quite a few times to get water flowing through pump 2 but it was not necessary to loosen any plumbing to release air pressure.