Just had a reputable company come out and install a new Trane XL16C Dual Fuel Heat Pump (3 ton) w/ Honeywell IAQ today and haul away my dying contractor grade Carrier 48gs gas pack (3.5 ton). The installers did a very good job made every effort to answer any questions I had. Now that I have had time to coexist with my system for a few hours I have some questions.
1) The installer showed me the dip switches where the CFM can be adjust. I believe that the settings are 350, 400 (default), and 450. Is this cfm setting for when the blower is at 100%? I believe the installer said, yes. If so seeing that my previous unit was a 3.5 ton should I bump the switch to run at 450?
2) What are the variable speed rules for the blower on heat mode? cool mode? i.e. x% for y time. How can I tell when the blower is running at 100%?
3) Since this unit has a 2 stage compressor, what are the rules for when the compressor engages stage 2? Can this be driven by or displayed on thermostat?
Thank you for your help.