Thank you very much for the info.
As mentioned I upgraded from a mechanical pak which ran the pump 24/7 (no filter cycle on those). I didnt get this doc with the new pak but I will read the doc and hopefully get my new unit figured out.
Assuming that the filter cycle is the only time the heater will run, will this be an issue in a Central Ontario winter? Or should I look at adding a circ pump to the tub?