I have a AH-Passport I/O control panel for my 3 ton Marine Airrrr system. I've read the manual throughly and I can figure out if it's possible to adjust the temperature range the system allows you to set for the boat. For instance, it currently allows you to set the temperature between 65 and 85 degrees. Since we're not at the boat during the winter and I'm trying to save some $$ on heating it, I want to set it down to 55, like you can on a house thermostat. Anyone have an idea on how to do this?