Does anyone know how the heat pump preferred setting on the Intellitouch system works? The manuals give no explanation and I have spoke to a Pentair tech twice in the past week and he was adamant that the Intellitouch systems decides which is most effective (ie the heat pump or the gas heater) - That is a pretty useless answer and doesn't help me much. When pushed he states that the gas heater is activated when there is a 6 degree difference between the ambient temperature and the desired pool heat. I have tested that and that is not true. I would have expected the Intellitouch to move from heat pump to gas heater when the ambient reaches below about 40 degrees. Any thoughts or help?